Astronics Corp NASDAQ:ATRO Historical Prices

Below are the 8000 trading days of historical prices for ATRO.

#	Exchange	Symbol	Date	Open	High	Low	Close
8000	NASDAQ	ATRO	Fri, Apr 19, 2024	15.92	16.22	15.83	16.02
7999	NASDAQ	ATRO	Thu, Apr 18, 2024	16.25	16.45	15.96	16.00
7998	NASDAQ	ATRO	Wed, Apr 17, 2024	16.86	16.94	16.12	16.12
7997	NASDAQ	ATRO	Tue, Apr 16, 2024	16.62	16.83	16.54	16.66
7996	NASDAQ	ATRO	Mon, Apr 15, 2024	17.03	17.16	16.67	16.77
7995	NASDAQ	ATRO	Fri, Apr 12, 2024	16.95	17.27	16.82	17.01
7994	NASDAQ	ATRO	Thu, Apr 11, 2024	17.18	17.18	16.79	17.00
7993	NASDAQ	ATRO	Wed, Apr 10, 2024	17.04	17.20	16.72	17.08
7992	NASDAQ	ATRO	Tue, Apr 9, 2024	17.82	17.99	17.46	17.49
7991	NASDAQ	ATRO	Mon, Apr 8, 2024	17.92	17.97	17.70	17.72
7990	NASDAQ	ATRO	Fri, Apr 5, 2024	17.66	17.79	17.64	17.70
7989	NASDAQ	ATRO	Thu, Apr 4, 2024	18.33	18.33	17.66	17.70
7988	NASDAQ	ATRO	Wed, Apr 3, 2024	17.55	18.15	17.50	18.09
7987	NASDAQ	ATRO	Tue, Apr 2, 2024	18.11	18.34	17.67	17.70
7986	NASDAQ	ATRO	Mon, Apr 1, 2024	19.20	19.20	18.40	18.41
7985	NASDAQ	ATRO	Thu, Mar 28, 2024	18.97	19.35	18.83	19.04
7984	NASDAQ	ATRO	Wed, Mar 27, 2024	18.38	19.03	18.30	18.92
7983	NASDAQ	ATRO	Tue, Mar 26, 2024	18.63	18.63	18.16	18.19
7982	NASDAQ	ATRO	Mon, Mar 25, 2024	18.49	18.65	18.34	18.46
7981	NASDAQ	ATRO	Fri, Mar 22, 2024	19.09	19.31	18.34	18.41
7980	NASDAQ	ATRO	Thu, Mar 21, 2024	18.26	19.04	18.24	18.99
7979	NASDAQ	ATRO	Wed, Mar 20, 2024	17.56	18.17	17.54	18.08
7978	NASDAQ	ATRO	Tue, Mar 19, 2024	17.43	17.88	17.43	17.65
7977	NASDAQ	ATRO	Mon, Mar 18, 2024	17.63	17.70	17.46	17.50
7976	NASDAQ	ATRO	Fri, Mar 15, 2024	17.39	17.77	17.39	17.65
7975	NASDAQ	ATRO	Thu, Mar 14, 2024	17.78	17.93	17.35	17.41
7974	NASDAQ	ATRO	Wed, Mar 13, 2024	17.85	18.06	17.60	17.74
7973	NASDAQ	ATRO	Tue, Mar 12, 2024	18.00	18.00	17.64	17.91
7972	NASDAQ	ATRO	Mon, Mar 11, 2024	18.10	18.27	17.97	18.08
7971	NASDAQ	ATRO	Fri, Mar 8, 2024	18.60	18.78	17.99	18.15
7970	NASDAQ	ATRO	Thu, Mar 7, 2024	18.61	18.89	18.45	18.50
7969	NASDAQ	ATRO	Wed, Mar 6, 2024	18.28	18.62	18.24	18.50
7968	NASDAQ	ATRO	Tue, Mar 5, 2024	18.95	18.95	18.11	18.21
7967	NASDAQ	ATRO	Mon, Mar 4, 2024	19.07	19.25	18.43	18.90
7966	NASDAQ	ATRO	Fri, Mar 1, 2024	19.25	19.29	18.53	19.11
7965	NASDAQ	ATRO	Thu, Feb 29, 2024	20.11	20.36	18.53	19.17
7964	NASDAQ	ATRO	Wed, Feb 28, 2024	19.17	19.67	19.07	19.51
7963	NASDAQ	ATRO	Tue, Feb 27, 2024	19.38	19.60	19.23	19.36
7962	NASDAQ	ATRO	Mon, Feb 26, 2024	18.78	19.28	18.78	19.22
7961	NASDAQ	ATRO	Fri, Feb 23, 2024	18.74	18.96	18.55	18.94
7960	NASDAQ	ATRO	Thu, Feb 22, 2024	18.89	19.02	18.53	18.65
7959	NASDAQ	ATRO	Wed, Feb 21, 2024	19.00	19.13	18.87	18.91
7958	NASDAQ	ATRO	Tue, Feb 20, 2024	18.92	19.22	18.86	19.06
7957	NASDAQ	ATRO	Fri, Feb 16, 2024	19.13	19.27	18.88	19.19
7956	NASDAQ	ATRO	Thu, Feb 15, 2024	19.09	19.50	18.86	19.21
7955	NASDAQ	ATRO	Wed, Feb 14, 2024	18.54	19.00	18.47	18.87
7954	NASDAQ	ATRO	Tue, Feb 13, 2024	18.56	18.56	18.04	18.21
7953	NASDAQ	ATRO	Mon, Feb 12, 2024	18.40	19.25	18.40	19.16
7952	NASDAQ	ATRO	Fri, Feb 9, 2024	18.10	18.47	18.01	18.33
7951	NASDAQ	ATRO	Thu, Feb 8, 2024	17.78	18.08	17.65	17.99
7950	NASDAQ	ATRO	Wed, Feb 7, 2024	17.87	18.19	17.70	17.79
7949	NASDAQ	ATRO	Tue, Feb 6, 2024	17.45	17.99	17.45	17.74
7948	NASDAQ	ATRO	Mon, Feb 5, 2024	17.52	17.53	17.19	17.44
7947	NASDAQ	ATRO	Fri, Feb 2, 2024	17.38	17.75	17.27	17.64
7946	NASDAQ	ATRO	Thu, Feb 1, 2024	16.97	17.61	16.90	17.56
7945	NASDAQ	ATRO	Wed, Jan 31, 2024	17.41	17.49	16.89	16.91
7944	NASDAQ	ATRO	Tue, Jan 30, 2024	17.32	17.59	17.20	17.40
7943	NASDAQ	ATRO	Mon, Jan 29, 2024	17.29	17.52	16.98	17.44
7942	NASDAQ	ATRO	Fri, Jan 26, 2024	17.42	17.45	17.06	17.28
7941	NASDAQ	ATRO	Thu, Jan 25, 2024	17.71	17.98	17.26	17.40
7940	NASDAQ	ATRO	Wed, Jan 24, 2024	17.28	17.65	17.28	17.43
7939	NASDAQ	ATRO	Tue, Jan 23, 2024	17.33	17.56	17.09	17.22
7938	NASDAQ	ATRO	Mon, Jan 22, 2024	16.95	17.35	16.95	17.16
7937	NASDAQ	ATRO	Fri, Jan 19, 2024	16.69	16.94	16.36	16.87
7936	NASDAQ	ATRO	Thu, Jan 18, 2024	16.24	16.58	16.13	16.45
7935	NASDAQ	ATRO	Wed, Jan 17, 2024	16.03	16.33	15.87	16.09
7934	NASDAQ	ATRO	Tue, Jan 16, 2024	16.76	16.91	16.17	16.32
7933	NASDAQ	ATRO	Fri, Jan 12, 2024	16.93	17.08	16.75	16.94
7932	NASDAQ	ATRO	Thu, Jan 11, 2024	16.45	16.70	15.97	16.64
7931	NASDAQ	ATRO	Wed, Jan 10, 2024	16.33	17.80	16.05	16.66
7930	NASDAQ	ATRO	Tue, Jan 9, 2024	15.79	15.79	15.29	15.59
7929	NASDAQ	ATRO	Mon, Jan 8, 2024	15.69	15.96	15.56	15.96
7928	NASDAQ	ATRO	Fri, Jan 5, 2024	16.05	16.24	15.67	15.72
7927	NASDAQ	ATRO	Thu, Jan 4, 2024	16.55	16.59	16.13	16.14
7926	NASDAQ	ATRO	Wed, Jan 3, 2024	17.13	17.13	16.44	16.45
7925	NASDAQ	ATRO	Tue, Jan 2, 2024	17.29	17.47	16.83	17.23
7924	NASDAQ	ATRO	Fri, Dec 29, 2023	17.55	17.70	17.29	17.42
7923	NASDAQ	ATRO	Thu, Dec 28, 2023	17.59	17.66	16.73	17.59
7922	NASDAQ	ATRO	Wed, Dec 27, 2023	17.60	17.76	17.36	17.70
7921	NASDAQ	ATRO	Tue, Dec 26, 2023	17.08	17.75	16.99	17.58
7920	NASDAQ	ATRO	Fri, Dec 22, 2023	16.90	17.20	16.82	16.98
7919	NASDAQ	ATRO	Thu, Dec 21, 2023	16.71	16.92	16.51	16.80
7918	NASDAQ	ATRO	Wed, Dec 20, 2023	16.58	17.35	16.45	16.55
7917	NASDAQ	ATRO	Tue, Dec 19, 2023	16.18	16.66	16.14	16.64
7916	NASDAQ	ATRO	Mon, Dec 18, 2023	15.87	16.20	15.74	16.14
7915	NASDAQ	ATRO	Fri, Dec 15, 2023	16.30	16.30	15.75	15.77
7914	NASDAQ	ATRO	Thu, Dec 14, 2023	16.28	16.56	15.87	16.10
7913	NASDAQ	ATRO	Wed, Dec 13, 2023	15.72	16.29	15.58	16.06
7912	NASDAQ	ATRO	Tue, Dec 12, 2023	15.50	15.83	15.45	15.63
7911	NASDAQ	ATRO	Mon, Dec 11, 2023	15.19	15.59	15.19	15.57
7910	NASDAQ	ATRO	Fri, Dec 8, 2023	15.07	15.32	15.01	15.15
7909	NASDAQ	ATRO	Thu, Dec 7, 2023	15.10	15.20	14.85	15.15
7908	NASDAQ	ATRO	Wed, Dec 6, 2023	15.75	15.90	15.13	15.15
7907	NASDAQ	ATRO	Tue, Dec 5, 2023	15.69	15.91	15.51	15.73
7906	NASDAQ	ATRO	Mon, Dec 4, 2023	15.21	15.84	15.21	15.75
7905	NASDAQ	ATRO	Fri, Dec 1, 2023	14.73	15.38	14.73	15.33
7904	NASDAQ	ATRO	Thu, Nov 30, 2023	14.90	15.40	14.58	14.85
7903	NASDAQ	ATRO	Wed, Nov 29, 2023	15.26	15.49	14.78	14.90
7902	NASDAQ	ATRO	Tue, Nov 28, 2023	15.65	15.82	15.26	15.26
7901	NASDAQ	ATRO	Mon, Nov 27, 2023	15.31	15.79	15.19	15.77
7900	NASDAQ	ATRO	Fri, Nov 24, 2023	15.28	15.61	15.28	15.47
7899	NASDAQ	ATRO	Wed, Nov 22, 2023	15.56	15.64	15.28	15.39
7898	NASDAQ	ATRO	Tue, Nov 21, 2023	15.37	15.67	15.37	15.50
7897	NASDAQ	ATRO	Mon, Nov 20, 2023	15.50	15.65	15.47	15.50
7896	NASDAQ	ATRO	Fri, Nov 17, 2023	15.67	15.81	15.47	15.55
7895	NASDAQ	ATRO	Thu, Nov 16, 2023	15.42	15.62	15.06	15.52
7894	NASDAQ	ATRO	Wed, Nov 15, 2023	15.45	15.99	15.45	15.57
7893	NASDAQ	ATRO	Tue, Nov 14, 2023	15.23	15.50	15.11	15.46
7892	NASDAQ	ATRO	Mon, Nov 13, 2023	14.54	14.89	14.54	14.79
7891	NASDAQ	ATRO	Fri, Nov 10, 2023	14.32	14.93	14.11	14.72
7890	NASDAQ	ATRO	Thu, Nov 9, 2023	16.15	16.55	14.31	14.33
7889	NASDAQ	ATRO	Wed, Nov 8, 2023	16.24	16.55	16.11	16.55
7888	NASDAQ	ATRO	Tue, Nov 7, 2023	15.96	16.22	15.87	16.17
7887	NASDAQ	ATRO	Mon, Nov 6, 2023	16.00	16.00	15.81	15.97
7886	NASDAQ	ATRO	Fri, Nov 3, 2023	16.10	16.30	15.95	16.05
7885	NASDAQ	ATRO	Thu, Nov 2, 2023	15.53	15.93	15.50	15.84
7884	NASDAQ	ATRO	Wed, Nov 1, 2023	15.31	15.31	14.98	15.27
7883	NASDAQ	ATRO	Tue, Oct 31, 2023	15.07	15.38	15.06	15.33
7882	NASDAQ	ATRO	Mon, Oct 30, 2023	14.92	15.09	14.80	15.07
7881	NASDAQ	ATRO	Fri, Oct 27, 2023	14.92	14.99	14.66	14.80
7880	NASDAQ	ATRO	Thu, Oct 26, 2023	15.01	15.28	14.84	14.96
7879	NASDAQ	ATRO	Wed, Oct 25, 2023	15.01	15.60	14.82	14.98
7878	NASDAQ	ATRO	Tue, Oct 24, 2023	15.58	15.59	15.03	15.07
7877	NASDAQ	ATRO	Mon, Oct 23, 2023	15.07	15.50	15.01	15.45
7876	NASDAQ	ATRO	Fri, Oct 20, 2023	15.44	15.47	15.07	15.12
7875	NASDAQ	ATRO	Thu, Oct 19, 2023	15.53	15.59	15.30	15.37
7874	NASDAQ	ATRO	Wed, Oct 18, 2023	15.46	15.65	15.16	15.51
7873	NASDAQ	ATRO	Tue, Oct 17, 2023	15.35	15.78	15.32	15.57
7872	NASDAQ	ATRO	Mon, Oct 16, 2023	15.49	15.59	15.32	15.38
7871	NASDAQ	ATRO	Fri, Oct 13, 2023	15.81	15.81	15.12	15.27
7870	NASDAQ	ATRO	Thu, Oct 12, 2023	16.32	16.32	15.78	15.83
7869	NASDAQ	ATRO	Wed, Oct 11, 2023	16.43	16.70	16.20	16.31
7868	NASDAQ	ATRO	Tue, Oct 10, 2023	16.32	16.46	16.24	16.39
7867	NASDAQ	ATRO	Mon, Oct 9, 2023	16.06	16.38	15.35	16.23
7866	NASDAQ	ATRO	Fri, Oct 6, 2023	15.76	16.22	15.56	16.10
7865	NASDAQ	ATRO	Thu, Oct 5, 2023	15.93	16.09	15.84	15.91
7864	NASDAQ	ATRO	Wed, Oct 4, 2023	15.69	15.93	15.53	15.89
7863	NASDAQ	ATRO	Tue, Oct 3, 2023	15.67	15.95	15.66	15.70
7862	NASDAQ	ATRO	Mon, Oct 2, 2023	15.76	15.99	15.64	15.92
7861	NASDAQ	ATRO	Fri, Sep 29, 2023	16.19	16.35	15.77	15.86
7860	NASDAQ	ATRO	Thu, Sep 28, 2023	15.90	16.28	15.87	16.06
7859	NASDAQ	ATRO	Wed, Sep 27, 2023	15.58	15.92	15.50	15.86
7858	NASDAQ	ATRO	Tue, Sep 26, 2023	15.56	15.69	15.38	15.48
7857	NASDAQ	ATRO	Mon, Sep 25, 2023	15.50	15.83	15.45	15.69
7856	NASDAQ	ATRO	Fri, Sep 22, 2023	16.18	16.41	15.58	15.60
7855	NASDAQ	ATRO	Thu, Sep 21, 2023	16.26	16.39	16.13	16.18
7854	NASDAQ	ATRO	Wed, Sep 20, 2023	16.80	17.07	16.41	16.44
7853	NASDAQ	ATRO	Tue, Sep 19, 2023	16.65	16.80	16.59	16.73
7852	NASDAQ	ATRO	Mon, Sep 18, 2023	16.61	16.70	16.35	16.66
7851	NASDAQ	ATRO	Fri, Sep 15, 2023	16.58	16.68	16.41	16.57
7850	NASDAQ	ATRO	Thu, Sep 14, 2023	16.63	16.76	16.47	16.59
7849	NASDAQ	ATRO	Wed, Sep 13, 2023	16.45	16.55	16.27	16.50
7848	NASDAQ	ATRO	Tue, Sep 12, 2023	16.77	16.91	16.53	16.53
7847	NASDAQ	ATRO	Mon, Sep 11, 2023	16.82	16.82	16.82	16.82
7846	NASDAQ	ATRO	Fri, Sep 8, 2023	17.01	17.05	16.62	16.70
7845	NASDAQ	ATRO	Thu, Sep 7, 2023	17.05	17.15	16.81	16.95
7844	NASDAQ	ATRO	Wed, Sep 6, 2023	16.75	17.26	16.75	17.18
7843	NASDAQ	ATRO	Tue, Sep 5, 2023	17.41	17.50	16.77	16.78
7842	NASDAQ	ATRO	Fri, Sep 1, 2023	17.68	17.88	17.54	17.60
7841	NASDAQ	ATRO	Thu, Aug 31, 2023	17.82	17.89	17.39	17.53
7840	NASDAQ	ATRO	Wed, Aug 30, 2023	17.51	17.83	17.38	17.80
7839	NASDAQ	ATRO	Tue, Aug 29, 2023	17.21	17.73	17.01	17.63
7838	NASDAQ	ATRO	Mon, Aug 28, 2023	17.03	17.46	17.03	17.21
7837	NASDAQ	ATRO	Fri, Aug 25, 2023	16.81	16.95	16.45	16.95
7836	NASDAQ	ATRO	Thu, Aug 24, 2023	16.86	16.99	16.64	16.67
7835	NASDAQ	ATRO	Wed, Aug 23, 2023	17.17	17.50	16.98	17.02
7834	NASDAQ	ATRO	Tue, Aug 22, 2023	17.09	17.50	16.93	17.17
7833	NASDAQ	ATRO	Mon, Aug 21, 2023	16.87	17.99	16.86	16.99
7832	NASDAQ	ATRO	Fri, Aug 18, 2023	16.72	17.01	16.58	16.84
7831	NASDAQ	ATRO	Thu, Aug 17, 2023	16.87	17.16	16.79	16.81
7830	NASDAQ	ATRO	Wed, Aug 16, 2023	16.73	17.11	16.72	16.83
7829	NASDAQ	ATRO	Tue, Aug 15, 2023	16.97	17.13	16.58	16.64
7828	NASDAQ	ATRO	Mon, Aug 14, 2023	16.86	17.26	16.80	17.10
7827	NASDAQ	ATRO	Fri, Aug 11, 2023	17.03	17.36	16.86	16.96
7826	NASDAQ	ATRO	Thu, Aug 10, 2023	17.37	17.70	16.98	17.09
7825	NASDAQ	ATRO	Wed, Aug 9, 2023	17.01	17.63	16.85	17.22
7824	NASDAQ	ATRO	Tue, Aug 8, 2023	17.40	18.43	17.39	18.11
7823	NASDAQ	ATRO	Mon, Aug 7, 2023	17.36	18.64	17.34	17.42
7822	NASDAQ	ATRO	Fri, Aug 4, 2023	19.02	19.54	16.50	17.02
7821	NASDAQ	ATRO	Thu, Aug 3, 2023	20.81	21.60	20.59	21.13
7820	NASDAQ	ATRO	Wed, Aug 2, 2023	21.12	21.66	20.93	21.06
7819	NASDAQ	ATRO	Tue, Aug 1, 2023	20.87	21.78	20.87	21.53
7818	NASDAQ	ATRO	Mon, Jul 31, 2023	20.25	21.16	20.24	20.98
7817	NASDAQ	ATRO	Fri, Jul 28, 2023	20.47	21.08	20.16	20.24
7816	NASDAQ	ATRO	Thu, Jul 27, 2023	20.91	21.05	20.20	20.34
7815	NASDAQ	ATRO	Wed, Jul 26, 2023	20.60	21.43	20.60	20.86
7814	NASDAQ	ATRO	Tue, Jul 25, 2023	20.76	20.99	20.50	20.55
7813	NASDAQ	ATRO	Mon, Jul 24, 2023	21.42	21.73	20.94	20.99
7812	NASDAQ	ATRO	Fri, Jul 21, 2023	21.77	21.94	21.05	21.52
7811	NASDAQ	ATRO	Thu, Jul 20, 2023	21.79	21.93	21.36	21.70
7810	NASDAQ	ATRO	Wed, Jul 19, 2023	22.02	22.44	21.57	21.81
7809	NASDAQ	ATRO	Tue, Jul 18, 2023	19.74	22.05	19.56	22.01
7808	NASDAQ	ATRO	Mon, Jul 17, 2023	18.24	18.65	18.16	18.55
7807	NASDAQ	ATRO	Fri, Jul 14, 2023	18.65	18.65	18.06	18.29
7806	NASDAQ	ATRO	Thu, Jul 13, 2023	18.63	18.98	18.30	18.69
7805	NASDAQ	ATRO	Wed, Jul 12, 2023	19.39	19.39	18.61	18.66
7804	NASDAQ	ATRO	Tue, Jul 11, 2023	18.93	19.08	18.75	19.05
7803	NASDAQ	ATRO	Mon, Jul 10, 2023	18.59	19.00	18.59	18.89
7802	NASDAQ	ATRO	Fri, Jul 7, 2023	18.80	19.29	18.77	18.79
7801	NASDAQ	ATRO	Thu, Jul 6, 2023	19.21	19.47	18.64	18.79
7800	NASDAQ	ATRO	Wed, Jul 5, 2023	19.73	19.82	19.16	19.50
7799	NASDAQ	ATRO	Mon, Jul 3, 2023	19.90	20.08	19.75	19.96
7798	NASDAQ	ATRO	Fri, Jun 30, 2023	20.25	20.36	19.78	19.86
7797	NASDAQ	ATRO	Thu, Jun 29, 2023	20.08	20.54	19.80	20.16
7796	NASDAQ	ATRO	Wed, Jun 28, 2023	19.44	20.67	19.34	20.07
7795	NASDAQ	ATRO	Tue, Jun 27, 2023	19.25	19.62	19.09	19.43
7794	NASDAQ	ATRO	Mon, Jun 26, 2023	18.38	19.24	18.24	19.17
7793	NASDAQ	ATRO	Fri, Jun 23, 2023	18.83	18.91	18.06	18.44
7792	NASDAQ	ATRO	Thu, Jun 22, 2023	19.40	19.45	18.93	19.09
7791	NASDAQ	ATRO	Wed, Jun 21, 2023	18.17	20.19	18.02	19.61
7790	NASDAQ	ATRO	Tue, Jun 20, 2023	17.87	18.50	17.61	18.28
7789	NASDAQ	ATRO	Fri, Jun 16, 2023	18.14	18.18	17.76	17.88
7788	NASDAQ	ATRO	Thu, Jun 15, 2023	17.67	18.00	17.66	17.90
7787	NASDAQ	ATRO	Wed, Jun 14, 2023	18.19	18.33	17.73	17.81
7786	NASDAQ	ATRO	Tue, Jun 13, 2023	18.05	18.61	18.05	18.16
7785	NASDAQ	ATRO	Mon, Jun 12, 2023	17.76	18.19	17.57	18.04
7784	NASDAQ	ATRO	Fri, Jun 9, 2023	17.42	17.63	17.15	17.44
7783	NASDAQ	ATRO	Thu, Jun 8, 2023	17.81	17.86	17.44	17.53
7782	NASDAQ	ATRO	Wed, Jun 7, 2023	17.46	18.13	17.34	17.87
7781	NASDAQ	ATRO	Tue, Jun 6, 2023	16.58	17.40	16.58	17.34
7780	NASDAQ	ATRO	Mon, Jun 5, 2023	16.82	16.84	16.51	16.73
7779	NASDAQ	ATRO	Fri, Jun 2, 2023	16.30	16.95	16.26	16.94
7778	NASDAQ	ATRO	Thu, Jun 1, 2023	15.88	16.16	15.61	15.97
7777	NASDAQ	ATRO	Wed, May 31, 2023	16.06	16.24	15.80	15.90
7776	NASDAQ	ATRO	Tue, May 30, 2023	16.34	16.43	16.05	16.10
7775	NASDAQ	ATRO	Fri, May 26, 2023	16.45	16.71	16.30	16.36
7774	NASDAQ	ATRO	Thu, May 25, 2023	16.49	16.71	16.27	16.52
7773	NASDAQ	ATRO	Wed, May 24, 2023	16.97	16.97	16.46	16.61
7772	NASDAQ	ATRO	Tue, May 23, 2023	17.28	17.52	17.01	17.02
7771	NASDAQ	ATRO	Mon, May 22, 2023	17.11	17.58	17.11	17.31
7770	NASDAQ	ATRO	Fri, May 19, 2023	17.47	17.47	16.98	17.09
7769	NASDAQ	ATRO	Thu, May 18, 2023	16.79	17.26	16.79	17.22
7768	NASDAQ	ATRO	Wed, May 17, 2023	16.26	16.92	16.01	16.85
7767	NASDAQ	ATRO	Tue, May 16, 2023	16.05	16.31	16.01	16.10
7766	NASDAQ	ATRO	Mon, May 15, 2023	15.59	16.44	15.56	16.26
7765	NASDAQ	ATRO	Fri, May 12, 2023	15.64	16.31	15.38	15.58
7764	NASDAQ	ATRO	Thu, May 11, 2023	15.64	15.73	15.46	15.60
7763	NASDAQ	ATRO	Wed, May 10, 2023	16.81	17.08	15.45	15.86
7762	NASDAQ	ATRO	Tue, May 9, 2023	14.79	15.31	14.49	15.10
7761	NASDAQ	ATRO	Mon, May 8, 2023	15.31	15.40	14.70	14.80
7760	NASDAQ	ATRO	Fri, May 5, 2023	14.69	15.27	14.66	15.17
7759	NASDAQ	ATRO	Thu, May 4, 2023	14.88	14.91	14.07	14.51
7758	NASDAQ	ATRO	Wed, May 3, 2023	14.92	15.46	14.85	15.02
7757	NASDAQ	ATRO	Tue, May 2, 2023	14.88	14.88	14.63	14.80
7756	NASDAQ	ATRO	Mon, May 1, 2023	14.67	15.27	14.67	14.96
7755	NASDAQ	ATRO	Fri, Apr 28, 2023	14.64	14.94	14.61	14.74
7754	NASDAQ	ATRO	Thu, Apr 27, 2023	14.58	14.84	14.35	14.72
7753	NASDAQ	ATRO	Wed, Apr 26, 2023	14.95	15.09	14.50	14.58
7752	NASDAQ	ATRO	Tue, Apr 25, 2023	15.50	15.68	15.00	15.04
7751	NASDAQ	ATRO	Mon, Apr 24, 2023	15.82	16.16	15.66	15.69
7750	NASDAQ	ATRO	Fri, Apr 21, 2023	16.19	16.27	15.43	15.96
7749	NASDAQ	ATRO	Thu, Apr 20, 2023	15.80	16.33	15.72	16.12
7748	NASDAQ	ATRO	Wed, Apr 19, 2023	15.75	16.05	15.65	15.90
7747	NASDAQ	ATRO	Tue, Apr 18, 2023	15.86	16.16	15.76	16.00
7746	NASDAQ	ATRO	Mon, Apr 17, 2023	15.24	15.83	15.11	15.76
7745	NASDAQ	ATRO	Fri, Apr 14, 2023	15.58	15.58	14.97	15.22
7744	NASDAQ	ATRO	Thu, Apr 13, 2023	15.53	15.73	15.25	15.59
7743	NASDAQ	ATRO	Wed, Apr 12, 2023	15.02	15.57	14.96	15.47
7742	NASDAQ	ATRO	Tue, Apr 11, 2023	14.77	15.20	14.67	14.92
7741	NASDAQ	ATRO	Mon, Apr 10, 2023	13.80	14.73	13.80	14.69
7740	NASDAQ	ATRO	Thu, Apr 6, 2023	13.47	13.82	13.26	13.77
7739	NASDAQ	ATRO	Wed, Apr 5, 2023	13.42	13.82	12.91	13.13
7738	NASDAQ	ATRO	Tue, Apr 4, 2023	13.70	13.70	13.03	13.45
7737	NASDAQ	ATRO	Mon, Apr 3, 2023	13.37	13.75	13.26	13.62
7736	NASDAQ	ATRO	Fri, Mar 31, 2023	13.41	13.61	13.18	13.36
7735	NASDAQ	ATRO	Thu, Mar 30, 2023	13.42	13.45	13.11	13.26
7734	NASDAQ	ATRO	Wed, Mar 29, 2023	13.47	13.53	13.31	13.36
7733	NASDAQ	ATRO	Tue, Mar 28, 2023	13.00	13.39	12.41	13.35
7732	NASDAQ	ATRO	Mon, Mar 27, 2023	12.82	13.10	12.77	13.06
7731	NASDAQ	ATRO	Fri, Mar 24, 2023	12.49	12.73	12.26	12.69
7730	NASDAQ	ATRO	Thu, Mar 23, 2023	12.78	12.93	12.48	12.59
7729	NASDAQ	ATRO	Wed, Mar 22, 2023	13.15	13.15	12.72	12.73
7728	NASDAQ	ATRO	Tue, Mar 21, 2023	12.88	13.21	12.88	13.15
7727	NASDAQ	ATRO	Mon, Mar 20, 2023	12.63	12.90	12.57	12.62
7726	NASDAQ	ATRO	Fri, Mar 17, 2023	12.54	12.54	12.21	12.40
7725	NASDAQ	ATRO	Thu, Mar 16, 2023	12.43	13.02	12.36	12.79
7724	NASDAQ	ATRO	Wed, Mar 15, 2023	12.79	12.89	12.13	12.63
7723	NASDAQ	ATRO	Tue, Mar 14, 2023	13.26	13.40	12.92	13.11
7722	NASDAQ	ATRO	Mon, Mar 13, 2023	12.89	13.57	12.53	12.82
7721	NASDAQ	ATRO	Fri, Mar 10, 2023	13.37	13.55	12.92	13.14
7720	NASDAQ	ATRO	Thu, Mar 9, 2023	14.03	14.11	13.42	13.51
7719	NASDAQ	ATRO	Wed, Mar 8, 2023	14.57	14.65	13.81	13.98
7718	NASDAQ	ATRO	Tue, Mar 7, 2023	14.10	14.53	14.07	14.47
7717	NASDAQ	ATRO	Mon, Mar 6, 2023	14.87	14.87	13.82	14.12
7716	NASDAQ	ATRO	Fri, Mar 3, 2023	14.30	14.99	12.51	14.71
7715	NASDAQ	ATRO	Thu, Mar 2, 2023	14.95	15.98	14.89	15.71
7714	NASDAQ	ATRO	Wed, Mar 1, 2023	15.24	15.27	14.55	15.20
7713	NASDAQ	ATRO	Tue, Feb 28, 2023	14.74	15.54	14.74	15.24
7712	NASDAQ	ATRO	Mon, Feb 27, 2023	14.75	15.00	14.67	14.79
7711	NASDAQ	ATRO	Fri, Feb 24, 2023	14.78	14.78	14.34	14.59
7710	NASDAQ	ATRO	Thu, Feb 23, 2023	14.92	15.30	14.83	15.04
7709	NASDAQ	ATRO	Wed, Feb 22, 2023	14.54	15.11	14.43	14.79
7708	NASDAQ	ATRO	Tue, Feb 21, 2023	14.45	14.72	14.45	14.51
7707	NASDAQ	ATRO	Fri, Feb 17, 2023	14.89	15.12	14.56	14.59
7706	NASDAQ	ATRO	Thu, Feb 16, 2023	14.96	15.12	14.10	14.81
7705	NASDAQ	ATRO	Wed, Feb 15, 2023	14.93	15.35	14.77	15.22
7704	NASDAQ	ATRO	Tue, Feb 14, 2023	14.26	15.15	14.26	14.97
7703	NASDAQ	ATRO	Mon, Feb 13, 2023	13.88	14.49	13.79	14.44
7702	NASDAQ	ATRO	Fri, Feb 10, 2023	13.73	14.09	13.51	13.94
7701	NASDAQ	ATRO	Thu, Feb 9, 2023	14.43	14.61	13.79	13.81
7700	NASDAQ	ATRO	Wed, Feb 8, 2023	14.41	14.51	14.21	14.28
7699	NASDAQ	ATRO	Tue, Feb 7, 2023	14.49	14.80	14.33	14.60
7698	NASDAQ	ATRO	Mon, Feb 6, 2023	14.56	14.67	14.23	14.49
7697	NASDAQ	ATRO	Fri, Feb 3, 2023	14.80	15.16	14.52	14.66
7696	NASDAQ	ATRO	Thu, Feb 2, 2023	14.82	15.45	14.74	14.94
7695	NASDAQ	ATRO	Wed, Feb 1, 2023	14.81	15.35	14.60	14.79
7694	NASDAQ	ATRO	Tue, Jan 31, 2023	14.73	15.07	14.73	14.85
7693	NASDAQ	ATRO	Mon, Jan 30, 2023	14.51	14.93	14.51	14.68
7692	NASDAQ	ATRO	Fri, Jan 27, 2023	14.60	15.21	14.46	14.78
7691	NASDAQ	ATRO	Thu, Jan 26, 2023	15.01	15.22	14.20	14.46
7690	NASDAQ	ATRO	Wed, Jan 25, 2023	14.52	15.09	14.32	14.91
7689	NASDAQ	ATRO	Tue, Jan 24, 2023	14.60	15.21	14.43	14.86
7688	NASDAQ	ATRO	Mon, Jan 23, 2023	14.44	15.04	13.70	14.60
7687	NASDAQ	ATRO	Fri, Jan 20, 2023	11.75	14.86	11.56	14.66
7686	NASDAQ	ATRO	Thu, Jan 19, 2023	10.45	10.59	10.23	10.34
7685	NASDAQ	ATRO	Wed, Jan 18, 2023	10.72	10.78	10.45	10.50
7684	NASDAQ	ATRO	Tue, Jan 17, 2023	10.93	10.98	10.63	10.65
7683	NASDAQ	ATRO	Fri, Jan 13, 2023	10.82	11.13	10.82	10.99
7682	NASDAQ	ATRO	Thu, Jan 12, 2023	10.75	11.02	10.50	10.97
7681	NASDAQ	ATRO	Wed, Jan 11, 2023	10.21	10.88	10.21	10.74
7680	NASDAQ	ATRO	Tue, Jan 10, 2023	10.06	10.34	9.92	10.29
7679	NASDAQ	ATRO	Mon, Jan 9, 2023	10.80	10.80	10.17	10.18
7678	NASDAQ	ATRO	Fri, Jan 6, 2023	10.34	10.82	10.34	10.63
7677	NASDAQ	ATRO	Thu, Jan 5, 2023	10.13	10.41	9.93	10.33
7676	NASDAQ	ATRO	Wed, Jan 4, 2023	10.33	10.43	10.17	10.28
7675	NASDAQ	ATRO	Tue, Jan 3, 2023	10.38	10.73	10.00	10.14
7674	NASDAQ	ATRO	Fri, Dec 30, 2022	9.92	10.36	9.86	10.30
7673	NASDAQ	ATRO	Thu, Dec 29, 2022	9.63	10.06	9.49	10.01
7672	NASDAQ	ATRO	Wed, Dec 28, 2022	9.80	9.93	9.04	9.60
7671	NASDAQ	ATRO	Tue, Dec 27, 2022	9.37	9.86	9.34	9.77
7670	NASDAQ	ATRO	Fri, Dec 23, 2022	9.55	9.69	9.33	9.48
7669	NASDAQ	ATRO	Thu, Dec 22, 2022	9.74	9.74	9.26	9.53
7668	NASDAQ	ATRO	Wed, Dec 21, 2022	9.71	9.93	9.67	9.84
7667	NASDAQ	ATRO	Tue, Dec 20, 2022	9.62	9.73	9.23	9.58
7666	NASDAQ	ATRO	Mon, Dec 19, 2022	9.67	9.74	9.59	9.59
7665	NASDAQ	ATRO	Fri, Dec 16, 2022	9.57	9.80	9.39	9.67
7664	NASDAQ	ATRO	Thu, Dec 15, 2022	10.08	10.08	9.65	9.74
7663	NASDAQ	ATRO	Wed, Dec 14, 2022	10.36	10.47	10.10	10.14
7662	NASDAQ	ATRO	Tue, Dec 13, 2022	10.04	10.41	9.88	10.32
7661	NASDAQ	ATRO	Mon, Dec 12, 2022	10.45	10.45	9.69	9.84
7660	NASDAQ	ATRO	Fri, Dec 9, 2022	10.69	10.88	10.44	10.45
7659	NASDAQ	ATRO	Thu, Dec 8, 2022	10.64	10.91	10.46	10.88
7658	NASDAQ	ATRO	Wed, Dec 7, 2022	10.25	10.89	10.09	10.60
7657	NASDAQ	ATRO	Tue, Dec 6, 2022	9.51	10.85	9.51	10.40
7656	NASDAQ	ATRO	Mon, Dec 5, 2022	9.11	9.20	8.92	9.00
7655	NASDAQ	ATRO	Fri, Dec 2, 2022	8.51	9.15	8.25	9.13
7654	NASDAQ	ATRO	Thu, Dec 1, 2022	8.43	8.83	8.23	8.67
7653	NASDAQ	ATRO	Wed, Nov 30, 2022	7.92	8.40	7.81	8.40
7652	NASDAQ	ATRO	Tue, Nov 29, 2022	7.71	8.14	7.65	7.98
7651	NASDAQ	ATRO	Mon, Nov 28, 2022	8.17	8.26	7.66	7.76
7650	NASDAQ	ATRO	Fri, Nov 25, 2022	8.36	8.36	8.11	8.30
7649	NASDAQ	ATRO	Wed, Nov 23, 2022	8.28	8.49	8.19	8.31
7648	NASDAQ	ATRO	Tue, Nov 22, 2022	8.18	8.40	7.95	8.30
7647	NASDAQ	ATRO	Mon, Nov 21, 2022	8.06	8.47	7.95	8.11
7646	NASDAQ	ATRO	Fri, Nov 18, 2022	7.96	8.35	7.84	8.14
7645	NASDAQ	ATRO	Thu, Nov 17, 2022	7.60	7.82	7.46	7.79
7644	NASDAQ	ATRO	Wed, Nov 16, 2022	8.55	8.69	7.53	7.62
7643	NASDAQ	ATRO	Tue, Nov 15, 2022	8.59	8.97	8.34	8.90
7642	NASDAQ	ATRO	Mon, Nov 14, 2022	8.66	8.66	8.23	8.36
7641	NASDAQ	ATRO	Fri, Nov 11, 2022	8.65	8.96	8.54	8.78
7640	NASDAQ	ATRO	Thu, Nov 10, 2022	7.91	8.66	7.69	8.65
7639	NASDAQ	ATRO	Wed, Nov 9, 2022	8.10	8.17	7.59	7.61
7638	NASDAQ	ATRO	Tue, Nov 8, 2022	9.25	9.32	8.14	8.18
7637	NASDAQ	ATRO	Mon, Nov 7, 2022	9.48	9.54	9.30	9.48
7636	NASDAQ	ATRO	Fri, Nov 4, 2022	9.32	9.44	9.05	9.44
7635	NASDAQ	ATRO	Thu, Nov 3, 2022	8.86	9.32	8.78	9.17
7634	NASDAQ	ATRO	Wed, Nov 2, 2022	9.50	9.64	9.01	9.02
7633	NASDAQ	ATRO	Tue, Nov 1, 2022	9.41	9.60	9.31	9.56
7632	NASDAQ	ATRO	Mon, Oct 31, 2022	9.08	9.33	8.80	9.26
7631	NASDAQ	ATRO	Fri, Oct 28, 2022	8.91	9.30	8.81	9.14
7630	NASDAQ	ATRO	Thu, Oct 27, 2022	8.75	9.12	8.75	8.90
7629	NASDAQ	ATRO	Wed, Oct 26, 2022	8.58	8.85	8.40	8.67
7628	NASDAQ	ATRO	Tue, Oct 25, 2022	8.37	8.67	8.37	8.54
7627	NASDAQ	ATRO	Mon, Oct 24, 2022	8.27	8.44	8.10	8.42
7626	NASDAQ	ATRO	Fri, Oct 21, 2022	8.22	8.36	8.05	8.26
7625	NASDAQ	ATRO	Thu, Oct 20, 2022	8.32	8.49	8.07	8.14
7624	NASDAQ	ATRO	Wed, Oct 19, 2022	8.33	8.39	8.13	8.37
7623	NASDAQ	ATRO	Tue, Oct 18, 2022	8.27	8.46	8.25	8.30
7622	NASDAQ	ATRO	Mon, Oct 17, 2022	8.14	8.31	8.02	8.15
7621	NASDAQ	ATRO	Fri, Oct 14, 2022	8.03	8.23	7.99	8.02
7620	NASDAQ	ATRO	Thu, Oct 13, 2022	7.56	8.20	7.53	8.04
7619	NASDAQ	ATRO	Wed, Oct 12, 2022	8.07	8.07	7.56	7.72
7618	NASDAQ	ATRO	Tue, Oct 11, 2022	7.87	8.30	7.86	8.15
7617	NASDAQ	ATRO	Mon, Oct 10, 2022	7.75	8.05	7.60	7.96
7616	NASDAQ	ATRO	Fri, Oct 7, 2022	7.91	7.91	7.61	7.61
7615	NASDAQ	ATRO	Thu, Oct 6, 2022	7.95	8.13	7.86	7.93
7614	NASDAQ	ATRO	Wed, Oct 5, 2022	8.20	8.35	8.00	8.02
7613	NASDAQ	ATRO	Tue, Oct 4, 2022	8.42	8.72	8.29	8.37
7612	NASDAQ	ATRO	Mon, Oct 3, 2022	7.91	8.41	7.83	8.35
7611	NASDAQ	ATRO	Fri, Sep 30, 2022	8.03	8.23	7.84	7.86
7610	NASDAQ	ATRO	Thu, Sep 29, 2022	8.23	8.23	7.89	8.07
7609	NASDAQ	ATRO	Wed, Sep 28, 2022	8.44	8.46	8.24	8.36
7608	NASDAQ	ATRO	Tue, Sep 27, 2022	8.39	8.57	8.30	8.35
7607	NASDAQ	ATRO	Mon, Sep 26, 2022	8.28	8.59	8.25	8.34
7606	NASDAQ	ATRO	Fri, Sep 23, 2022	8.62	8.62	8.25	8.33
7605	NASDAQ	ATRO	Thu, Sep 22, 2022	8.75	8.83	8.27	8.62
7604	NASDAQ	ATRO	Wed, Sep 21, 2022	8.81	9.07	8.62	8.85
7603	NASDAQ	ATRO	Tue, Sep 20, 2022	8.31	8.76	8.23	8.75
7602	NASDAQ	ATRO	Mon, Sep 19, 2022	8.31	8.51	8.12	8.32
7601	NASDAQ	ATRO	Fri, Sep 16, 2022	8.54	8.54	8.19	8.38
7600	NASDAQ	ATRO	Thu, Sep 15, 2022	8.85	8.87	8.55	8.70
7599	NASDAQ	ATRO	Wed, Sep 14, 2022	8.86	8.94	8.64	8.86
7598	NASDAQ	ATRO	Tue, Sep 13, 2022	9.28	9.42	8.65	8.78
7597	NASDAQ	ATRO	Mon, Sep 12, 2022	8.87	9.45	8.80	9.41
7596	NASDAQ	ATRO	Fri, Sep 9, 2022	9.02	9.07	8.81	8.84
7595	NASDAQ	ATRO	Thu, Sep 8, 2022	8.50	8.90	8.46	8.83
7594	NASDAQ	ATRO	Wed, Sep 7, 2022	8.55	8.69	8.45	8.60
7593	NASDAQ	ATRO	Tue, Sep 6, 2022	8.76	8.77	8.50	8.60
7592	NASDAQ	ATRO	Fri, Sep 2, 2022	8.90	9.10	8.63	8.76
7591	NASDAQ	ATRO	Thu, Sep 1, 2022	9.30	9.30	8.72	8.76
7590	NASDAQ	ATRO	Wed, Aug 31, 2022	9.44	9.47	9.19	9.21
7589	NASDAQ	ATRO	Tue, Aug 30, 2022	9.79	9.83	9.42	9.47
7588	NASDAQ	ATRO	Mon, Aug 29, 2022	10.09	10.24	9.81	9.85
7587	NASDAQ	ATRO	Fri, Aug 26, 2022	10.94	10.94	10.00	10.07
7586	NASDAQ	ATRO	Thu, Aug 25, 2022	10.69	10.90	10.55	10.64
7585	NASDAQ	ATRO	Wed, Aug 24, 2022	11.06	11.22	10.67	10.73
7584	NASDAQ	ATRO	Tue, Aug 23, 2022	11.20	11.50	11.06	11.07
7583	NASDAQ	ATRO	Mon, Aug 22, 2022	11.32	11.38	11.02	11.25
7582	NASDAQ	ATRO	Fri, Aug 19, 2022	11.72	11.72	11.47	11.52
7581	NASDAQ	ATRO	Thu, Aug 18, 2022	11.78	12.03	11.74	11.90
7580	NASDAQ	ATRO	Wed, Aug 17, 2022	12.05	12.18	11.82	11.86
7579	NASDAQ	ATRO	Tue, Aug 16, 2022	11.85	12.31	11.66	12.23
7578	NASDAQ	ATRO	Mon, Aug 15, 2022	11.54	11.95	10.70	11.93
7577	NASDAQ	ATRO	Fri, Aug 12, 2022	11.50	11.88	11.12	11.67
7576	NASDAQ	ATRO	Thu, Aug 11, 2022	11.50	11.66	11.46	11.50
7575	NASDAQ	ATRO	Wed, Aug 10, 2022	11.55	11.74	11.34	11.50
7574	NASDAQ	ATRO	Tue, Aug 9, 2022	11.23	11.71	11.01	11.52
7573	NASDAQ	ATRO	Mon, Aug 8, 2022	11.00	11.22	10.66	11.17
7572	NASDAQ	ATRO	Fri, Aug 5, 2022	11.16	11.27	10.92	11.02
7571	NASDAQ	ATRO	Thu, Aug 4, 2022	11.08	11.50	10.94	11.34
7570	NASDAQ	ATRO	Wed, Aug 3, 2022	11.06	11.30	10.72	11.16
7569	NASDAQ	ATRO	Tue, Aug 2, 2022	11.00	11.21	10.78	10.95
7568	NASDAQ	ATRO	Mon, Aug 1, 2022	11.10	11.33	10.73	11.11
7567	NASDAQ	ATRO	Fri, Jul 29, 2022	10.70	11.27	10.70	11.22
7566	NASDAQ	ATRO	Thu, Jul 28, 2022	10.78	10.88	10.55	10.77
7565	NASDAQ	ATRO	Wed, Jul 27, 2022	10.34	10.70	10.34	10.66
7564	NASDAQ	ATRO	Tue, Jul 26, 2022	10.51	10.54	10.24	10.32
7563	NASDAQ	ATRO	Mon, Jul 25, 2022	10.29	10.49	10.15	10.47
7562	NASDAQ	ATRO	Fri, Jul 22, 2022	10.35	10.46	10.14	10.24
7561	NASDAQ	ATRO	Thu, Jul 21, 2022	10.52	10.52	10.14	10.41
7560	NASDAQ	ATRO	Wed, Jul 20, 2022	10.42	10.71	10.20	10.49
7559	NASDAQ	ATRO	Tue, Jul 19, 2022	10.53	10.70	10.41	10.49
7558	NASDAQ	ATRO	Mon, Jul 18, 2022	10.17	10.86	10.17	10.49
7557	NASDAQ	ATRO	Fri, Jul 15, 2022	9.96	10.69	9.65	10.08
7556	NASDAQ	ATRO	Thu, Jul 14, 2022	9.71	9.82	9.53	9.75
7555	NASDAQ	ATRO	Wed, Jul 13, 2022	9.76	10.00	9.73	9.88
7554	NASDAQ	ATRO	Tue, Jul 12, 2022	9.77	10.17	9.77	10.02
7553	NASDAQ	ATRO	Mon, Jul 11, 2022	10.55	10.55	9.79	9.84
7552	NASDAQ	ATRO	Fri, Jul 8, 2022	10.25	10.39	9.99	10.11
7551	NASDAQ	ATRO	Thu, Jul 7, 2022	9.88	10.47	9.88	10.19
7550	NASDAQ	ATRO	Wed, Jul 6, 2022	10.07	10.17	9.62	9.93
7549	NASDAQ	ATRO	Tue, Jul 5, 2022	10.18	10.18	9.84	10.06
7548	NASDAQ	ATRO	Fri, Jul 1, 2022	10.00	10.49	10.00	10.40
7547	NASDAQ	ATRO	Thu, Jun 30, 2022	9.67	10.19	9.56	10.17
7546	NASDAQ	ATRO	Wed, Jun 29, 2022	10.71	10.99	9.68	9.83
7545	NASDAQ	ATRO	Tue, Jun 28, 2022	10.86	11.12	10.54	10.54
7544	NASDAQ	ATRO	Mon, Jun 27, 2022	10.87	10.93	10.43	10.85
7543	NASDAQ	ATRO	Fri, Jun 24, 2022	10.79	11.05	10.72	10.76
7542	NASDAQ	ATRO	Thu, Jun 23, 2022	10.75	10.82	10.39	10.76
7541	NASDAQ	ATRO	Wed, Jun 22, 2022	10.80	10.95	10.61	10.76
7540	NASDAQ	ATRO	Tue, Jun 21, 2022	11.22	11.45	10.90	10.97
7539	NASDAQ	ATRO	Fri, Jun 17, 2022	10.94	11.15	10.69	11.08
7538	NASDAQ	ATRO	Thu, Jun 16, 2022	11.07	11.10	10.15	10.83
7537	NASDAQ	ATRO	Wed, Jun 15, 2022	10.91	11.50	10.89	11.34
7536	NASDAQ	ATRO	Tue, Jun 14, 2022	11.55	11.55	10.56	10.84
7535	NASDAQ	ATRO	Mon, Jun 13, 2022	11.16	11.65	10.80	11.55
7534	NASDAQ	ATRO	Fri, Jun 10, 2022	11.05	11.60	10.87	11.51
7533	NASDAQ	ATRO	Thu, Jun 9, 2022	11.57	11.64	11.26	11.28
7532	NASDAQ	ATRO	Wed, Jun 8, 2022	10.90	11.71	10.85	11.68
7531	NASDAQ	ATRO	Tue, Jun 7, 2022	10.72	10.93	10.64	10.89
7530	NASDAQ	ATRO	Mon, Jun 6, 2022	10.87	11.50	10.71	10.83
7529	NASDAQ	ATRO	Fri, Jun 3, 2022	10.77	10.89	10.40	10.74
7528	NASDAQ	ATRO	Thu, Jun 2, 2022	10.47	10.93	10.39	10.80
7527	NASDAQ	ATRO	Wed, Jun 1, 2022	10.59	10.75	10.45	10.52
7526	NASDAQ	ATRO	Tue, May 31, 2022	10.53	10.63	10.37	10.50
7525	NASDAQ	ATRO	Fri, May 27, 2022	10.31	10.60	10.08	10.55
7524	NASDAQ	ATRO	Thu, May 26, 2022	10.16	10.42	10.11	10.22
7523	NASDAQ	ATRO	Wed, May 25, 2022	9.83	10.12	9.83	10.06
7522	NASDAQ	ATRO	Tue, May 24, 2022	9.97	10.12	9.53	9.90
7521	NASDAQ	ATRO	Mon, May 23, 2022	10.15	10.20	9.82	10.03
7520	NASDAQ	ATRO	Fri, May 20, 2022	10.59	10.88	9.91	10.15
7519	NASDAQ	ATRO	Thu, May 19, 2022	10.75	11.14	10.45	10.51
7518	NASDAQ	ATRO	Wed, May 18, 2022	11.02	11.35	10.65	10.76
7517	NASDAQ	ATRO	Tue, May 17, 2022	10.84	11.40	10.72	11.20
7516	NASDAQ	ATRO	Mon, May 16, 2022	10.70	11.10	10.58	10.64
7515	NASDAQ	ATRO	Fri, May 13, 2022	10.57	10.86	10.47	10.71
7514	NASDAQ	ATRO	Thu, May 12, 2022	10.25	10.56	10.15	10.54
7513	NASDAQ	ATRO	Wed, May 11, 2022	10.68	11.12	10.30	10.36
7512	NASDAQ	ATRO	Tue, May 10, 2022	10.26	10.64	10.10	10.59
7511	NASDAQ	ATRO	Mon, May 9, 2022	10.45	10.45	9.67	10.12
7510	NASDAQ	ATRO	Fri, May 6, 2022	10.05	11.38	9.69	10.73
7509	NASDAQ	ATRO	Thu, May 5, 2022	9.76	9.92	9.70	9.80
7508	NASDAQ	ATRO	Wed, May 4, 2022	9.59	9.93	9.39	9.90
7507	NASDAQ	ATRO	Tue, May 3, 2022	9.55	9.76	9.34	9.50
7506	NASDAQ	ATRO	Mon, May 2, 2022	9.62	9.80	9.38	9.62
7505	NASDAQ	ATRO	Fri, Apr 29, 2022	9.99	10.44	9.66	9.69
7504	NASDAQ	ATRO	Thu, Apr 28, 2022	10.08	10.27	9.24	10.08
7503	NASDAQ	ATRO	Wed, Apr 27, 2022	10.29	10.50	9.98	10.00
7502	NASDAQ	ATRO	Tue, Apr 26, 2022	10.59	11.03	10.20	10.32
7501	NASDAQ	ATRO	Mon, Apr 25, 2022	10.83	11.17	10.45	10.73
7500	NASDAQ	ATRO	Fri, Apr 22, 2022	11.06	11.40	10.92	10.98
7499	NASDAQ	ATRO	Thu, Apr 21, 2022	11.65	11.75	11.01	11.13
7498	NASDAQ	ATRO	Wed, Apr 20, 2022	11.75	11.76	11.52	11.59
7497	NASDAQ	ATRO	Tue, Apr 19, 2022	11.69	12.01	11.61	11.63
7496	NASDAQ	ATRO	Mon, Apr 18, 2022	11.94	11.94	11.48	11.70
7495	NASDAQ	ATRO	Thu, Apr 14, 2022	12.09	12.26	11.92	11.97
7494	NASDAQ	ATRO	Wed, Apr 13, 2022	11.57	11.98	11.57	11.92
7493	NASDAQ	ATRO	Tue, Apr 12, 2022	11.39	11.82	11.29	11.58
7492	NASDAQ	ATRO	Mon, Apr 11, 2022	11.28	11.68	11.20	11.29
7491	NASDAQ	ATRO	Fri, Apr 8, 2022	11.83	11.87	11.31	11.37
7490	NASDAQ	ATRO	Thu, Apr 7, 2022	11.40	11.75	11.23	11.70
7489	NASDAQ	ATRO	Wed, Apr 6, 2022	11.43	11.60	11.00	11.43
7488	NASDAQ	ATRO	Tue, Apr 5, 2022	12.52	12.70	11.60	11.63
7487	NASDAQ	ATRO	Mon, Apr 4, 2022	13.00	13.11	12.44	12.51
7486	NASDAQ	ATRO	Fri, Apr 1, 2022	13.00	13.19	12.68	13.02
7485	NASDAQ	ATRO	Thu, Mar 31, 2022	13.11	13.31	12.78	12.93
7484	NASDAQ	ATRO	Wed, Mar 30, 2022	13.32	13.48	13.02	13.07
7483	NASDAQ	ATRO	Tue, Mar 29, 2022	13.52	13.76	13.32	13.40
7482	NASDAQ	ATRO	Mon, Mar 28, 2022	13.70	13.80	13.12	13.38
7481	NASDAQ	ATRO	Fri, Mar 25, 2022	13.74	14.38	13.64	13.74
7480	NASDAQ	ATRO	Thu, Mar 24, 2022	13.12	13.89	12.97	13.77
7479	NASDAQ	ATRO	Wed, Mar 23, 2022	13.24	13.26	12.94	13.00
7478	NASDAQ	ATRO	Tue, Mar 22, 2022	13.09	13.52	13.00	13.24
7477	NASDAQ	ATRO	Mon, Mar 21, 2022	13.12	13.20	12.86	13.00
7476	NASDAQ	ATRO	Fri, Mar 18, 2022	12.92	13.37	12.83	13.14
7475	NASDAQ	ATRO	Thu, Mar 17, 2022	13.00	13.00	12.73	12.90
7474	NASDAQ	ATRO	Wed, Mar 16, 2022	13.00	13.37	12.85	13.00
7473	NASDAQ	ATRO	Tue, Mar 15, 2022	12.99	13.11	12.71	12.99
7472	NASDAQ	ATRO	Mon, Mar 14, 2022	12.89	12.97	12.64	12.95
7471	NASDAQ	ATRO	Fri, Mar 11, 2022	13.38	13.45	12.78	12.78
7470	NASDAQ	ATRO	Thu, Mar 10, 2022	13.49	13.68	13.20	13.28
7469	NASDAQ	ATRO	Wed, Mar 9, 2022	13.34	13.99	13.28	13.68
7468	NASDAQ	ATRO	Tue, Mar 8, 2022	13.02	13.86	12.89	13.18
7467	NASDAQ	ATRO	Mon, Mar 7, 2022	13.00	13.52	12.88	12.88
7466	NASDAQ	ATRO	Fri, Mar 4, 2022	13.02	13.02	12.45	12.90
7465	NASDAQ	ATRO	Thu, Mar 3, 2022	14.16	14.16	13.01	13.18
7464	NASDAQ	ATRO	Wed, Mar 2, 2022	13.50	14.37	12.33	14.21
7463	NASDAQ	ATRO	Tue, Mar 1, 2022	14.70	14.70	14.05	14.17
7462	NASDAQ	ATRO	Mon, Feb 28, 2022	14.25	14.87	14.24	14.71
7461	NASDAQ	ATRO	Fri, Feb 25, 2022	14.06	14.29	13.97	14.23
7460	NASDAQ	ATRO	Thu, Feb 24, 2022	13.06	14.04	13.06	14.02
7459	NASDAQ	ATRO	Wed, Feb 23, 2022	13.71	13.75	13.48	13.56
7458	NASDAQ	ATRO	Tue, Feb 22, 2022	13.76	14.02	13.42	13.60
7457	NASDAQ	ATRO	Fri, Feb 18, 2022	14.13	14.57	13.88	13.93
7456	NASDAQ	ATRO	Thu, Feb 17, 2022	14.01	14.22	13.71	14.15
7455	NASDAQ	ATRO	Wed, Feb 16, 2022	13.84	14.10	13.77	14.08
7454	NASDAQ	ATRO	Tue, Feb 15, 2022	13.03	13.97	13.03	13.83
7453	NASDAQ	ATRO	Mon, Feb 14, 2022	13.55	13.77	13.29	13.43
7452	NASDAQ	ATRO	Fri, Feb 11, 2022	13.03	13.55	13.03	13.50
7451	NASDAQ	ATRO	Thu, Feb 10, 2022	12.67	13.29	12.67	13.10
7450	NASDAQ	ATRO	Wed, Feb 9, 2022	12.52	12.89	12.48	12.87
7449	NASDAQ	ATRO	Tue, Feb 8, 2022	12.16	12.84	12.16	12.49
7448	NASDAQ	ATRO	Mon, Feb 7, 2022	11.44	11.76	11.38	11.60
7447	NASDAQ	ATRO	Fri, Feb 4, 2022	11.45	11.48	11.11	11.38
7446	NASDAQ	ATRO	Thu, Feb 3, 2022	11.87	12.13	11.47	11.49
7445	NASDAQ	ATRO	Wed, Feb 2, 2022	11.97	12.19	11.47	12.03
7444	NASDAQ	ATRO	Tue, Feb 1, 2022	12.12	12.55	11.89	12.03
7443	NASDAQ	ATRO	Mon, Jan 31, 2022	11.79	12.18	11.70	12.03
7442	NASDAQ	ATRO	Fri, Jan 28, 2022	11.56	12.25	11.24	11.94
7441	NASDAQ	ATRO	Thu, Jan 27, 2022	12.40	12.40	11.50	11.61
7440	NASDAQ	ATRO	Wed, Jan 26, 2022	13.08	13.27	12.27	12.38
7439	NASDAQ	ATRO	Tue, Jan 25, 2022	12.22	13.07	12.02	13.00
7438	NASDAQ	ATRO	Mon, Jan 24, 2022	12.14	12.50	11.76	12.41
7437	NASDAQ	ATRO	Fri, Jan 21, 2022	12.18	12.49	12.08	12.36
7436	NASDAQ	ATRO	Thu, Jan 20, 2022	12.99	13.20	12.35	12.37
7435	NASDAQ	ATRO	Wed, Jan 19, 2022	12.86	13.24	12.72	12.99
7434	NASDAQ	ATRO	Tue, Jan 18, 2022	13.21	13.21	12.79	13.00
7433	NASDAQ	ATRO	Fri, Jan 14, 2022	12.68	13.17	12.48	13.11
7432	NASDAQ	ATRO	Thu, Jan 13, 2022	13.08	13.26	12.72	12.75
7431	NASDAQ	ATRO	Wed, Jan 12, 2022	13.32	13.46	13.02	13.03
7430	NASDAQ	ATRO	Tue, Jan 11, 2022	13.26	13.56	12.88	13.17
7429	NASDAQ	ATRO	Mon, Jan 10, 2022	13.57	13.75	12.93	13.26
7428	NASDAQ	ATRO	Fri, Jan 7, 2022	13.24	13.76	13.20	13.63
7427	NASDAQ	ATRO	Thu, Jan 6, 2022	13.27	13.48	12.98	13.33
7426	NASDAQ	ATRO	Wed, Jan 5, 2022	12.94	13.37	12.92	13.24
7425	NASDAQ	ATRO	Tue, Jan 4, 2022	12.13	12.89	12.13	12.87
7424	NASDAQ	ATRO	Mon, Jan 3, 2022	12.05	12.31	11.92	12.02
7423	NASDAQ	ATRO	Fri, Dec 31, 2021	12.00	12.16	11.87	12.00
7422	NASDAQ	ATRO	Thu, Dec 30, 2021	12.07	12.32	11.87	11.97
7421	NASDAQ	ATRO	Wed, Dec 29, 2021	11.95	12.13	11.66	12.07
7420	NASDAQ	ATRO	Tue, Dec 28, 2021	11.92	12.28	11.53	11.98
7419	NASDAQ	ATRO	Mon, Dec 27, 2021	11.73	11.94	11.58	11.91
7418	NASDAQ	ATRO	Thu, Dec 23, 2021	11.61	11.87	11.55	11.70
7417	NASDAQ	ATRO	Wed, Dec 22, 2021	11.30	11.56	11.22	11.56
7416	NASDAQ	ATRO	Tue, Dec 21, 2021	10.67	11.32	10.67	11.25
7415	NASDAQ	ATRO	Mon, Dec 20, 2021	10.81	10.92	10.35	10.54
7414	NASDAQ	ATRO	Fri, Dec 17, 2021	10.31	12.22	10.10	11.22
7413	NASDAQ	ATRO	Thu, Dec 16, 2021	10.56	10.85	10.22	10.31
7412	NASDAQ	ATRO	Wed, Dec 15, 2021	10.23	10.50	10.00	10.50
7411	NASDAQ	ATRO	Tue, Dec 14, 2021	10.37	10.49	10.16	10.26
7410	NASDAQ	ATRO	Mon, Dec 13, 2021	10.59	10.59	10.10	10.33
7409	NASDAQ	ATRO	Fri, Dec 10, 2021	11.04	11.04	10.51	10.70
7408	NASDAQ	ATRO	Thu, Dec 9, 2021	10.96	11.29	10.70	10.74
7407	NASDAQ	ATRO	Wed, Dec 8, 2021	10.73	11.32	10.73	11.13
7406	NASDAQ	ATRO	Tue, Dec 7, 2021	10.93	11.20	10.75	10.80
7405	NASDAQ	ATRO	Mon, Dec 6, 2021	10.22	11.00	10.08	10.80
7404	NASDAQ	ATRO	Fri, Dec 3, 2021	10.30	10.43	9.94	10.04
7403	NASDAQ	ATRO	Thu, Dec 2, 2021	10.36	10.50	10.00	10.30
7402	NASDAQ	ATRO	Wed, Dec 1, 2021	11.00	11.08	10.07	10.17
7401	NASDAQ	ATRO	Tue, Nov 30, 2021	10.75	10.75	10.23	10.46
7400	NASDAQ	ATRO	Mon, Nov 29, 2021	11.48	11.52	10.62	10.64
7399	NASDAQ	ATRO	Fri, Nov 26, 2021	11.61	11.67	10.81	11.42
7398	NASDAQ	ATRO	Wed, Nov 24, 2021	12.60	12.60	12.26	12.30
7397	NASDAQ	ATRO	Tue, Nov 23, 2021	12.62	12.91	12.36	12.42
7396	NASDAQ	ATRO	Mon, Nov 22, 2021	13.05	13.07	12.50	12.61
7395	NASDAQ	ATRO	Fri, Nov 19, 2021	12.89	13.07	12.65	12.70
7394	NASDAQ	ATRO	Thu, Nov 18, 2021	13.51	13.54	13.01	13.06
7393	NASDAQ	ATRO	Wed, Nov 17, 2021	13.62	13.77	13.44	13.52
7392	NASDAQ	ATRO	Tue, Nov 16, 2021	13.96	13.96	13.45	13.72
7391	NASDAQ	ATRO	Mon, Nov 15, 2021	14.32	14.47	13.83	14.00
7390	NASDAQ	ATRO	Fri, Nov 12, 2021	14.43	14.70	14.01	14.14
7389	NASDAQ	ATRO	Thu, Nov 11, 2021	14.40	14.78	14.16	14.44
7388	NASDAQ	ATRO	Wed, Nov 10, 2021	14.13	14.55	13.74	14.38
7387	NASDAQ	ATRO	Tue, Nov 9, 2021	14.31	14.39	13.91	14.24
7386	NASDAQ	ATRO	Mon, Nov 8, 2021	14.00	14.45	13.26	14.31
7385	NASDAQ	ATRO	Fri, Nov 5, 2021	13.87	14.58	13.87	14.55
7384	NASDAQ	ATRO	Thu, Nov 4, 2021	13.54	13.64	13.21	13.48
7383	NASDAQ	ATRO	Wed, Nov 3, 2021	13.00	13.67	13.00	13.51
7382	NASDAQ	ATRO	Tue, Nov 2, 2021	13.58	13.58	13.06	13.27
7381	NASDAQ	ATRO	Mon, Nov 1, 2021	12.90	13.59	12.90	13.52
7380	NASDAQ	ATRO	Fri, Oct 29, 2021	13.26	13.26	12.57	12.90
7379	NASDAQ	ATRO	Thu, Oct 28, 2021	12.87	13.24	12.64	12.76
7378	NASDAQ	ATRO	Wed, Oct 27, 2021	13.15	13.34	12.85	12.87
7377	NASDAQ	ATRO	Tue, Oct 26, 2021	13.25	13.42	12.96	13.19
7376	NASDAQ	ATRO	Mon, Oct 25, 2021	13.24	13.96	13.13	13.18
7375	NASDAQ	ATRO	Fri, Oct 22, 2021	13.45	13.60	13.14	13.27
7374	NASDAQ	ATRO	Thu, Oct 21, 2021	13.55	13.85	13.37	13.53
7373	NASDAQ	ATRO	Wed, Oct 20, 2021	13.72	13.90	13.24	13.56
7372	NASDAQ	ATRO	Tue, Oct 19, 2021	13.81	13.87	13.52	13.80
7371	NASDAQ	ATRO	Mon, Oct 18, 2021	13.94	13.94	13.47	13.71
7370	NASDAQ	ATRO	Fri, Oct 15, 2021	13.96	14.36	13.37	14.13
7369	NASDAQ	ATRO	Thu, Oct 14, 2021	13.78	13.86	13.42	13.68
7368	NASDAQ	ATRO	Wed, Oct 13, 2021	13.67	13.80	13.27	13.65
7367	NASDAQ	ATRO	Tue, Oct 12, 2021	13.72	13.95	13.61	13.69
7366	NASDAQ	ATRO	Mon, Oct 11, 2021	14.08	14.24	13.75	13.77
7365	NASDAQ	ATRO	Fri, Oct 8, 2021	14.13	14.15	13.90	13.90
7364	NASDAQ	ATRO	Thu, Oct 7, 2021	14.04	14.34	14.04	14.17
7363	NASDAQ	ATRO	Wed, Oct 6, 2021	14.01	14.13	13.74	14.00
7362	NASDAQ	ATRO	Tue, Oct 5, 2021	14.47	14.47	14.00	14.24
7361	NASDAQ	ATRO	Mon, Oct 4, 2021	14.78	14.96	14.27	14.38
7360	NASDAQ	ATRO	Fri, Oct 1, 2021	14.17	14.87	14.12	14.84
7359	NASDAQ	ATRO	Thu, Sep 30, 2021	14.20	14.38	14.05	14.06
7358	NASDAQ	ATRO	Wed, Sep 29, 2021	14.29	14.42	13.93	14.23
7357	NASDAQ	ATRO	Tue, Sep 28, 2021	14.54	14.65	14.03	14.24
7356	NASDAQ	ATRO	Mon, Sep 27, 2021	14.24	14.67	14.24	14.42
7355	NASDAQ	ATRO	Fri, Sep 24, 2021	14.03	14.25	14.01	14.11
7354	NASDAQ	ATRO	Thu, Sep 23, 2021	13.59	14.16	13.59	14.08
7353	NASDAQ	ATRO	Wed, Sep 22, 2021	13.08	13.64	13.08	13.54
7352	NASDAQ	ATRO	Tue, Sep 21, 2021	13.61	13.65	12.89	13.03
7351	NASDAQ	ATRO	Mon, Sep 20, 2021	12.82	14.26	12.55	13.66
7350	NASDAQ	ATRO	Fri, Sep 17, 2021	13.00	13.20	12.59	12.61
7349	NASDAQ	ATRO	Thu, Sep 16, 2021	13.11	13.11	12.82	12.96
7348	NASDAQ	ATRO	Wed, Sep 15, 2021	13.00	13.16	12.77	13.12
7347	NASDAQ	ATRO	Tue, Sep 14, 2021	13.63	13.65	12.93	12.99
7346	NASDAQ	ATRO	Mon, Sep 13, 2021	13.36	13.78	13.24	13.52
7345	NASDAQ	ATRO	Fri, Sep 10, 2021	13.27	13.46	13.02	13.19
7344	NASDAQ	ATRO	Thu, Sep 9, 2021	13.23	13.48	13.08	13.08
7343	NASDAQ	ATRO	Wed, Sep 8, 2021	13.65	13.74	13.28	13.29
7342	NASDAQ	ATRO	Tue, Sep 7, 2021	13.58	13.88	13.39	13.62
7341	NASDAQ	ATRO	Fri, Sep 3, 2021	13.97	13.97	13.42	13.69
7340	NASDAQ	ATRO	Thu, Sep 2, 2021	13.44	13.76	13.44	13.63
7339	NASDAQ	ATRO	Wed, Sep 1, 2021	13.48	13.54	13.32	13.41
7338	NASDAQ	ATRO	Tue, Aug 31, 2021	13.52	13.64	13.26	13.36
7337	NASDAQ	ATRO	Mon, Aug 30, 2021	14.06	14.06	13.43	13.50
7336	NASDAQ	ATRO	Fri, Aug 27, 2021	13.57	14.03	13.35	13.90
7335	NASDAQ	ATRO	Thu, Aug 26, 2021	13.38	13.51	13.16	13.32
7334	NASDAQ	ATRO	Wed, Aug 25, 2021	13.32	13.46	13.12	13.37
7333	NASDAQ	ATRO	Tue, Aug 24, 2021	13.25	13.75	13.24	13.41
7332	NASDAQ	ATRO	Mon, Aug 23, 2021	13.30	13.45	12.93	13.20
7331	NASDAQ	ATRO	Fri, Aug 20, 2021	12.74	13.26	12.54	13.14
7330	NASDAQ	ATRO	Thu, Aug 19, 2021	13.15	13.39	12.56	12.77
7329	NASDAQ	ATRO	Wed, Aug 18, 2021	13.36	13.68	13.03	13.22
7328	NASDAQ	ATRO	Tue, Aug 17, 2021	13.78	13.85	13.34	13.43
7327	NASDAQ	ATRO	Mon, Aug 16, 2021	13.57	14.28	13.26	13.98
7326	NASDAQ	ATRO	Fri, Aug 13, 2021	14.20	14.20	13.55	13.59
7325	NASDAQ	ATRO	Thu, Aug 12, 2021	14.66	14.67	14.03	14.12
7324	NASDAQ	ATRO	Wed, Aug 11, 2021	14.48	14.87	14.00	14.57
7323	NASDAQ	ATRO	Tue, Aug 10, 2021	14.16	14.30	13.62	14.22
7322	NASDAQ	ATRO	Mon, Aug 9, 2021	15.40	15.44	13.95	14.13
7321	NASDAQ	ATRO	Fri, Aug 6, 2021	15.61	16.80	15.10	15.56
7320	NASDAQ	ATRO	Thu, Aug 5, 2021	16.10	17.11	16.10	16.59
7319	NASDAQ	ATRO	Wed, Aug 4, 2021	16.17	16.36	15.72	15.96
7318	NASDAQ	ATRO	Tue, Aug 3, 2021	17.19	17.19	16.25	16.53
7317	NASDAQ	ATRO	Mon, Aug 2, 2021	17.16	17.74	17.01	17.06
7316	NASDAQ	ATRO	Fri, Jul 30, 2021	17.51	17.65	16.96	17.08
7315	NASDAQ	ATRO	Thu, Jul 29, 2021	17.75	17.95	17.53	17.55
7314	NASDAQ	ATRO	Wed, Jul 28, 2021	17.60	17.90	17.19	17.50
7313	NASDAQ	ATRO	Tue, Jul 27, 2021	17.50	17.85	17.26	17.33
7312	NASDAQ	ATRO	Mon, Jul 26, 2021	17.46	17.84	17.46	17.70
7311	NASDAQ	ATRO	Fri, Jul 23, 2021	18.01	18.19	17.36	17.42
7310	NASDAQ	ATRO	Thu, Jul 22, 2021	18.30	18.42	17.64	17.85
7309	NASDAQ	ATRO	Wed, Jul 21, 2021	18.68	19.09	18.15	18.45
7308	NASDAQ	ATRO	Tue, Jul 20, 2021	17.47	18.90	17.47	18.68
7307	NASDAQ	ATRO	Mon, Jul 19, 2021	17.94	18.40	16.97	17.38
7306	NASDAQ	ATRO	Fri, Jul 16, 2021	18.71	19.07	18.54	18.93
7305	NASDAQ	ATRO	Thu, Jul 15, 2021	18.35	18.66	18.22	18.41
7304	NASDAQ	ATRO	Wed, Jul 14, 2021	18.88	19.16	18.35	18.56
7303	NASDAQ	ATRO	Tue, Jul 13, 2021	19.09	19.22	18.61	18.79
7302	NASDAQ	ATRO	Mon, Jul 12, 2021	18.22	19.28	18.19	19.25
7301	NASDAQ	ATRO	Fri, Jul 9, 2021	17.99	19.00	17.92	18.43
7300	NASDAQ	ATRO	Thu, Jul 8, 2021	16.79	17.85	16.62	17.68
7299	NASDAQ	ATRO	Wed, Jul 7, 2021	17.26	17.67	16.79	17.18
7298	NASDAQ	ATRO	Tue, Jul 6, 2021	17.98	17.98	17.24	17.43
7297	NASDAQ	ATRO	Fri, Jul 2, 2021	17.93	18.06	17.52	17.81
7296	NASDAQ	ATRO	Thu, Jul 1, 2021	17.88	17.99	17.34	17.94
7295	NASDAQ	ATRO	Wed, Jun 30, 2021	16.47	17.60	16.37	17.51
7294	NASDAQ	ATRO	Tue, Jun 29, 2021	17.00	17.02	16.47	16.50
7293	NASDAQ	ATRO	Mon, Jun 28, 2021	17.42	17.45	16.68	16.83
7292	NASDAQ	ATRO	Fri, Jun 25, 2021	18.00	18.02	17.54	17.55
7291	NASDAQ	ATRO	Thu, Jun 24, 2021	17.99	18.01	17.56	17.92
7290	NASDAQ	ATRO	Wed, Jun 23, 2021	17.91	18.26	17.56	17.97
7289	NASDAQ	ATRO	Tue, Jun 22, 2021	18.17	18.17	17.21	17.92
7288	NASDAQ	ATRO	Mon, Jun 21, 2021	17.44	18.24	17.14	18.16
7287	NASDAQ	ATRO	Fri, Jun 18, 2021	18.21	18.44	17.35	17.39
7286	NASDAQ	ATRO	Thu, Jun 17, 2021	19.31	19.65	18.40	18.54
7285	NASDAQ	ATRO	Wed, Jun 16, 2021	19.68	19.99	19.33	19.45
7284	NASDAQ	ATRO	Tue, Jun 15, 2021	20.53	20.93	19.34	19.78
7283	NASDAQ	ATRO	Mon, Jun 14, 2021	19.38	20.61	19.21	20.51
7282	NASDAQ	ATRO	Fri, Jun 11, 2021	18.19	19.26	18.19	19.23
7281	NASDAQ	ATRO	Thu, Jun 10, 2021	18.18	18.42	18.02	18.03
7280	NASDAQ	ATRO	Wed, Jun 9, 2021	18.72	18.85	18.07	18.11
7279	NASDAQ	ATRO	Tue, Jun 8, 2021	18.79	19.42	18.37	18.62
7278	NASDAQ	ATRO	Mon, Jun 7, 2021	18.33	18.82	18.20	18.77
7277	NASDAQ	ATRO	Fri, Jun 4, 2021	17.43	18.27	17.43	18.24
7276	NASDAQ	ATRO	Thu, Jun 3, 2021	17.55	17.77	17.34	17.69
7275	NASDAQ	ATRO	Wed, Jun 2, 2021	17.69	17.96	17.13	17.61
7274	NASDAQ	ATRO	Tue, Jun 1, 2021	17.18	17.64	16.99	17.55
7273	NASDAQ	ATRO	Fri, May 28, 2021	17.14	17.26	16.80	16.96
7272	NASDAQ	ATRO	Thu, May 27, 2021	16.66	17.28	16.66	17.14
7271	NASDAQ	ATRO	Wed, May 26, 2021	16.15	16.46	16.04	16.41
7270	NASDAQ	ATRO	Tue, May 25, 2021	16.49	16.99	16.04	16.06
7269	NASDAQ	ATRO	Mon, May 24, 2021	16.01	16.35	16.00	16.31
7268	NASDAQ	ATRO	Fri, May 21, 2021	15.70	16.15	15.63	15.99
7267	NASDAQ	ATRO	Thu, May 20, 2021	15.66	15.66	15.20	15.50
7266	NASDAQ	ATRO	Wed, May 19, 2021	15.71	15.95	15.33	15.60
7265	NASDAQ	ATRO	Tue, May 18, 2021	15.80	16.14	15.66	16.00
7264	NASDAQ	ATRO	Mon, May 17, 2021	15.97	16.07	15.51	15.69
7263	NASDAQ	ATRO	Fri, May 14, 2021	16.51	16.62	16.04	16.09
7262	NASDAQ	ATRO	Thu, May 13, 2021	15.70	16.52	15.70	16.41
7261	NASDAQ	ATRO	Wed, May 12, 2021	15.83	15.97	15.57	15.61
7260	NASDAQ	ATRO	Tue, May 11, 2021	15.37	16.10	15.12	15.91
7259	NASDAQ	ATRO	Mon, May 10, 2021	15.69	15.86	15.25	15.68
7258	NASDAQ	ATRO	Fri, May 7, 2021	16.76	17.26	15.51	15.61
7257	NASDAQ	ATRO	Thu, May 6, 2021	17.56	17.56	16.22	17.11
7256	NASDAQ	ATRO	Wed, May 5, 2021	17.91	18.22	17.46	17.57
7255	NASDAQ	ATRO	Tue, May 4, 2021	17.79	17.95	17.20	17.69
7254	NASDAQ	ATRO	Mon, May 3, 2021	17.57	17.98	17.39	17.90
7253	NASDAQ	ATRO	Fri, Apr 30, 2021	17.00	17.47	17.00	17.41
7252	NASDAQ	ATRO	Thu, Apr 29, 2021	17.26	17.78	17.02	17.22
7251	NASDAQ	ATRO	Wed, Apr 28, 2021	17.10	17.23	17.05	17.15
7250	NASDAQ	ATRO	Tue, Apr 27, 2021	17.22	17.28	17.00	17.11
7249	NASDAQ	ATRO	Mon, Apr 26, 2021	17.34	17.65	17.19	17.23
7248	NASDAQ	ATRO	Fri, Apr 23, 2021	17.00	17.25	16.51	17.19
7247	NASDAQ	ATRO	Thu, Apr 22, 2021	17.35	17.45	16.97	16.98
7246	NASDAQ	ATRO	Wed, Apr 21, 2021	16.44	17.27	16.17	17.22
7245	NASDAQ	ATRO	Tue, Apr 20, 2021	17.12	17.40	16.52	16.63
7244	NASDAQ	ATRO	Mon, Apr 19, 2021	17.27	17.42	16.97	17.21
7243	NASDAQ	ATRO	Fri, Apr 16, 2021	17.31	17.41	16.89	17.36
7242	NASDAQ	ATRO	Thu, Apr 15, 2021	17.84	17.85	16.94	17.10
7241	NASDAQ	ATRO	Wed, Apr 14, 2021	17.64	18.07	17.52	17.59
7240	NASDAQ	ATRO	Tue, Apr 13, 2021	18.03	18.03	17.44	17.57
7239	NASDAQ	ATRO	Mon, Apr 12, 2021	18.62	18.62	17.70	18.29
7238	NASDAQ	ATRO	Fri, Apr 9, 2021	18.49	18.87	18.03	18.36
7237	NASDAQ	ATRO	Thu, Apr 8, 2021	18.31	18.40	17.90	18.39
7236	NASDAQ	ATRO	Wed, Apr 7, 2021	18.41	18.41	18.09	18.20
7235	NASDAQ	ATRO	Tue, Apr 6, 2021	18.40	18.78	18.37	18.43
7234	NASDAQ	ATRO	Mon, Apr 5, 2021	18.43	18.64	18.21	18.51
7233	NASDAQ	ATRO	Thu, Apr 1, 2021	18.22	18.49	17.95	18.24
7232	NASDAQ	ATRO	Wed, Mar 31, 2021	18.10	18.22	17.81	18.04
7231	NASDAQ	ATRO	Tue, Mar 30, 2021	17.54	18.28	17.40	17.97
7230	NASDAQ	ATRO	Mon, Mar 29, 2021	17.17	17.80	17.08	17.47
7229	NASDAQ	ATRO	Fri, Mar 26, 2021	17.69	17.94	17.00	17.33
7228	NASDAQ	ATRO	Thu, Mar 25, 2021	16.34	17.36	15.97	17.26
7227	NASDAQ	ATRO	Wed, Mar 24, 2021	17.29	18.02	16.65	16.66
7226	NASDAQ	ATRO	Tue, Mar 23, 2021	18.18	18.18	16.81	17.03
7225	NASDAQ	ATRO	Mon, Mar 22, 2021	18.76	18.83	18.04	18.42
7224	NASDAQ	ATRO	Fri, Mar 19, 2021	19.16	19.30	18.11	18.78
7223	NASDAQ	ATRO	Thu, Mar 18, 2021	18.59	19.58	17.87	19.00
7222	NASDAQ	ATRO	Wed, Mar 17, 2021	17.73	18.65	17.58	18.65
7221	NASDAQ	ATRO	Tue, Mar 16, 2021	17.95	17.95	17.24	17.77
7220	NASDAQ	ATRO	Mon, Mar 15, 2021	18.68	18.95	17.61	17.87
7219	NASDAQ	ATRO	Fri, Mar 12, 2021	17.34	18.58	17.34	18.41
7218	NASDAQ	ATRO	Thu, Mar 11, 2021	16.70	17.25	16.40	17.24
7217	NASDAQ	ATRO	Wed, Mar 10, 2021	15.85	17.05	15.84	16.52
7216	NASDAQ	ATRO	Tue, Mar 9, 2021	15.67	15.99	15.38	15.61
7215	NASDAQ	ATRO	Mon, Mar 8, 2021	15.88	16.32	15.41	15.79
7214	NASDAQ	ATRO	Fri, Mar 5, 2021	16.10	16.33	14.79	15.77
7213	NASDAQ	ATRO	Thu, Mar 4, 2021	16.42	17.16	15.12	15.78
7212	NASDAQ	ATRO	Wed, Mar 3, 2021	15.72	17.08	15.69	16.38
7211	NASDAQ	ATRO	Tue, Mar 2, 2021	16.32	16.74	15.58	15.58
7210	NASDAQ	ATRO	Mon, Mar 1, 2021	16.44	16.67	16.10	16.45
7209	NASDAQ	ATRO	Fri, Feb 26, 2021	16.43	16.61	15.52	15.80
7208	NASDAQ	ATRO	Thu, Feb 25, 2021	17.69	17.69	16.05	16.30
7207	NASDAQ	ATRO	Wed, Feb 24, 2021	16.08	17.65	15.98	17.57
7206	NASDAQ	ATRO	Tue, Feb 23, 2021	16.88	17.00	14.87	15.95
7205	NASDAQ	ATRO	Mon, Feb 22, 2021	16.58	17.77	16.53	17.52
7204	NASDAQ	ATRO	Fri, Feb 19, 2021	16.47	16.83	16.33	16.60
7203	NASDAQ	ATRO	Thu, Feb 18, 2021	16.67	16.90	16.10	16.25
7202	NASDAQ	ATRO	Wed, Feb 17, 2021	16.44	16.80	15.67	16.77
7201	NASDAQ	ATRO	Tue, Feb 16, 2021	15.97	16.25	15.83	16.14
7200	NASDAQ	ATRO	Fri, Feb 12, 2021	15.55	15.95	15.29	15.74
7199	NASDAQ	ATRO	Thu, Feb 11, 2021	15.36	15.83	15.05	15.56
7198	NASDAQ	ATRO	Wed, Feb 10, 2021	15.40	15.68	15.20	15.35
7197	NASDAQ	ATRO	Tue, Feb 9, 2021	14.81	15.29	14.44	15.17
7196	NASDAQ	ATRO	Mon, Feb 8, 2021	14.29	14.84	14.14	14.81
7195	NASDAQ	ATRO	Fri, Feb 5, 2021	14.26	14.31	13.99	14.08
7194	NASDAQ	ATRO	Thu, Feb 4, 2021	13.76	14.08	13.64	14.01
7193	NASDAQ	ATRO	Wed, Feb 3, 2021	13.16	13.65	13.16	13.61
7192	NASDAQ	ATRO	Tue, Feb 2, 2021	12.58	13.15	12.31	13.09
7191	NASDAQ	ATRO	Mon, Feb 1, 2021	12.59	12.80	12.11	12.29
7190	NASDAQ	ATRO	Fri, Jan 29, 2021	13.42	13.50	12.41	12.46
7189	NASDAQ	ATRO	Thu, Jan 28, 2021	13.78	13.96	13.11	13.35
7188	NASDAQ	ATRO	Wed, Jan 27, 2021	14.01	14.31	13.46	13.53
7187	NASDAQ	ATRO	Tue, Jan 26, 2021	14.29	14.61	14.15	14.39
7186	NASDAQ	ATRO	Mon, Jan 25, 2021	14.64	14.66	13.89	14.03
7185	NASDAQ	ATRO	Fri, Jan 22, 2021	14.23	14.80	14.03	14.67
7184	NASDAQ	ATRO	Thu, Jan 21, 2021	14.55	14.55	14.07	14.45
7183	NASDAQ	ATRO	Wed, Jan 20, 2021	14.58	14.64	14.41	14.50
7182	NASDAQ	ATRO	Tue, Jan 19, 2021	14.42	14.56	14.24	14.52
7181	NASDAQ	ATRO	Fri, Jan 15, 2021	14.07	14.18	13.80	14.14
7180	NASDAQ	ATRO	Thu, Jan 14, 2021	14.25	14.72	14.09	14.38
7179	NASDAQ	ATRO	Wed, Jan 13, 2021	13.31	14.09	13.22	14.00
7178	NASDAQ	ATRO	Tue, Jan 12, 2021	12.97	13.42	12.97	13.39
7177	NASDAQ	ATRO	Mon, Jan 11, 2021	12.85	13.38	12.80	12.91
7176	NASDAQ	ATRO	Fri, Jan 8, 2021	12.92	13.18	12.45	13.14
7175	NASDAQ	ATRO	Thu, Jan 7, 2021	13.12	13.20	12.65	12.71
7174	NASDAQ	ATRO	Wed, Jan 6, 2021	12.77	13.44	12.58	13.02
7173	NASDAQ	ATRO	Tue, Jan 5, 2021	12.12	12.70	12.12	12.47
7172	NASDAQ	ATRO	Mon, Jan 4, 2021	13.34	13.34	12.00	12.14
7171	NASDAQ	ATRO	Thu, Dec 31, 2020	13.06	13.32	12.94	13.23
7170	NASDAQ	ATRO	Wed, Dec 30, 2020	12.82	13.40	12.82	13.15
7169	NASDAQ	ATRO	Tue, Dec 29, 2020	13.65	13.65	12.58	12.75
7168	NASDAQ	ATRO	Mon, Dec 28, 2020	13.25	14.11	13.21	13.64
7167	NASDAQ	ATRO	Thu, Dec 24, 2020	13.03	13.50	12.75	13.08
7166	NASDAQ	ATRO	Wed, Dec 23, 2020	12.13	13.13	12.00	13.09
7165	NASDAQ	ATRO	Tue, Dec 22, 2020	12.12	12.17	11.71	11.95
7164	NASDAQ	ATRO	Mon, Dec 21, 2020	11.85	12.29	11.79	11.98
7163	NASDAQ	ATRO	Fri, Dec 18, 2020	12.28	12.59	12.03	12.40
7162	NASDAQ	ATRO	Thu, Dec 17, 2020	11.93	12.37	11.80	12.26
7161	NASDAQ	ATRO	Wed, Dec 16, 2020	12.13	12.34	11.71	11.95
7160	NASDAQ	ATRO	Tue, Dec 15, 2020	11.79	12.17	11.57	12.09
7159	NASDAQ	ATRO	Mon, Dec 14, 2020	11.91	12.22	11.59	11.64
7158	NASDAQ	ATRO	Fri, Dec 11, 2020	12.03	12.03	11.48	11.68
7157	NASDAQ	ATRO	Thu, Dec 10, 2020	12.01	12.34	11.92	12.12
7156	NASDAQ	ATRO	Wed, Dec 9, 2020	12.83	12.95	11.78	12.20
7155	NASDAQ	ATRO	Tue, Dec 8, 2020	12.36	12.73	12.23	12.62
7154	NASDAQ	ATRO	Mon, Dec 7, 2020	13.12	13.24	12.36	12.48
7153	NASDAQ	ATRO	Fri, Dec 4, 2020	12.90	13.18	12.65	13.15
7152	NASDAQ	ATRO	Thu, Dec 3, 2020	12.86	12.94	12.31	12.69
7151	NASDAQ	ATRO	Wed, Dec 2, 2020	11.80	12.59	11.50	12.50
7150	NASDAQ	ATRO	Tue, Dec 1, 2020	12.40	12.65	11.98	12.02
7149	NASDAQ	ATRO	Mon, Nov 30, 2020	12.20	12.20	11.25	11.42
7148	NASDAQ	ATRO	Fri, Nov 27, 2020	12.64	12.73	11.92	12.30
7147	NASDAQ	ATRO	Wed, Nov 25, 2020	12.38	12.82	11.95	12.55
7146	NASDAQ	ATRO	Tue, Nov 24, 2020	13.46	13.60	11.95	12.64
7145	NASDAQ	ATRO	Mon, Nov 23, 2020	12.27	13.15	11.84	12.82
7144	NASDAQ	ATRO	Fri, Nov 20, 2020	10.33	11.45	10.31	11.28
7143	NASDAQ	ATRO	Thu, Nov 19, 2020	9.20	9.54	8.99	9.50
7142	NASDAQ	ATRO	Wed, Nov 18, 2020	9.76	10.12	9.20	9.29
7141	NASDAQ	ATRO	Tue, Nov 17, 2020	9.01	9.33	8.55	9.29
7140	NASDAQ	ATRO	Mon, Nov 16, 2020	9.08	9.47	9.05	9.26
7139	NASDAQ	ATRO	Fri, Nov 13, 2020	7.76	8.76	7.75	8.71
7138	NASDAQ	ATRO	Thu, Nov 12, 2020	8.19	8.19	7.52	7.64
7137	NASDAQ	ATRO	Wed, Nov 11, 2020	8.93	8.93	8.28	8.40
7136	NASDAQ	ATRO	Tue, Nov 10, 2020	8.77	9.21	8.66	8.85
7135	NASDAQ	ATRO	Mon, Nov 9, 2020	7.55	8.92	7.55	8.50
7134	NASDAQ	ATRO	Fri, Nov 6, 2020	6.84	6.88	6.74	6.79
7133	NASDAQ	ATRO	Thu, Nov 5, 2020	6.77	6.90	6.74	6.81
7132	NASDAQ	ATRO	Wed, Nov 4, 2020	6.87	7.17	6.54	6.76
7131	NASDAQ	ATRO	Tue, Nov 3, 2020	6.84	7.12	6.72	6.97
7130	NASDAQ	ATRO	Mon, Nov 2, 2020	6.51	6.74	6.32	6.71
7129	NASDAQ	ATRO	Fri, Oct 30, 2020	6.92	7.15	6.30	6.40
7128	NASDAQ	ATRO	Thu, Oct 29, 2020	6.68	7.06	6.56	6.92
7127	NASDAQ	ATRO	Wed, Oct 28, 2020	6.81	7.00	6.61	6.62
7126	NASDAQ	ATRO	Tue, Oct 27, 2020	7.10	7.15	6.95	7.00
7125	NASDAQ	ATRO	Mon, Oct 26, 2020	7.58	7.63	7.05	7.14
7124	NASDAQ	ATRO	Fri, Oct 23, 2020	7.59	7.65	7.40	7.52
7123	NASDAQ	ATRO	Thu, Oct 22, 2020	7.45	7.62	7.39	7.52
7122	NASDAQ	ATRO	Wed, Oct 21, 2020	7.63	7.65	7.41	7.44
7121	NASDAQ	ATRO	Tue, Oct 20, 2020	7.63	7.74	7.57	7.63
7120	NASDAQ	ATRO	Mon, Oct 19, 2020	7.77	7.93	7.49	7.51
7119	NASDAQ	ATRO	Fri, Oct 16, 2020	7.84	7.88	7.67	7.74
7118	NASDAQ	ATRO	Thu, Oct 15, 2020	8.07	8.07	7.60	7.77
7117	NASDAQ	ATRO	Wed, Oct 14, 2020	7.94	8.12	7.90	7.91
7116	NASDAQ	ATRO	Tue, Oct 13, 2020	8.14	8.14	7.88	7.97
7115	NASDAQ	ATRO	Mon, Oct 12, 2020	8.29	8.43	8.14	8.29
7114	NASDAQ	ATRO	Fri, Oct 9, 2020	8.23	8.45	8.07	8.24
7113	NASDAQ	ATRO	Thu, Oct 8, 2020	8.14	8.21	7.79	8.09
7112	NASDAQ	ATRO	Wed, Oct 7, 2020	8.16	8.16	7.81	8.07
7111	NASDAQ	ATRO	Tue, Oct 6, 2020	8.34	8.45	7.72	7.74
7110	NASDAQ	ATRO	Mon, Oct 5, 2020	8.12	8.27	8.09	8.20
7109	NASDAQ	ATRO	Fri, Oct 2, 2020	7.65	8.10	7.65	8.05
7108	NASDAQ	ATRO	Thu, Oct 1, 2020	7.74	8.01	7.74	7.91
7107	NASDAQ	ATRO	Wed, Sep 30, 2020	7.68	7.95	7.62	7.72
7106	NASDAQ	ATRO	Tue, Sep 29, 2020	7.93	7.93	7.67	7.70
7105	NASDAQ	ATRO	Mon, Sep 28, 2020	8.00	8.29	7.96	7.99
7104	NASDAQ	ATRO	Fri, Sep 25, 2020	7.55	7.99	7.55	7.87
7103	NASDAQ	ATRO	Thu, Sep 24, 2020	7.85	7.85	7.42	7.60
7102	NASDAQ	ATRO	Wed, Sep 23, 2020	8.36	8.53	7.89	7.90
7101	NASDAQ	ATRO	Tue, Sep 22, 2020	8.33	8.57	8.18	8.32
7100	NASDAQ	ATRO	Mon, Sep 21, 2020	8.67	8.73	8.21	8.26
7099	NASDAQ	ATRO	Fri, Sep 18, 2020	8.60	9.14	8.56	9.00
7098	NASDAQ	ATRO	Thu, Sep 17, 2020	8.42	8.58	8.27	8.54
7097	NASDAQ	ATRO	Wed, Sep 16, 2020	8.00	8.67	7.92	8.52
7096	NASDAQ	ATRO	Tue, Sep 15, 2020	8.21	8.38	7.89	7.98
7095	NASDAQ	ATRO	Mon, Sep 14, 2020	8.22	8.22	8.01	8.14
7094	NASDAQ	ATRO	Fri, Sep 11, 2020	8.00	8.21	7.76	8.14
7093	NASDAQ	ATRO	Thu, Sep 10, 2020	8.28	8.35	7.90	7.92
7092	NASDAQ	ATRO	Wed, Sep 9, 2020	8.60	8.60	8.22	8.26
7091	NASDAQ	ATRO	Tue, Sep 8, 2020	8.70	8.81	8.48	8.49
7090	NASDAQ	ATRO	Fri, Sep 4, 2020	9.16	9.25	8.70	8.83
7089	NASDAQ	ATRO	Thu, Sep 3, 2020	9.27	9.57	8.88	8.92
7088	NASDAQ	ATRO	Wed, Sep 2, 2020	8.97	9.56	8.96	9.29
7087	NASDAQ	ATRO	Tue, Sep 1, 2020	8.96	9.07	8.75	8.96
7086	NASDAQ	ATRO	Mon, Aug 31, 2020	9.58	9.58	9.00	9.04
7085	NASDAQ	ATRO	Fri, Aug 28, 2020	9.43	9.73	9.32	9.68
7084	NASDAQ	ATRO	Thu, Aug 27, 2020	9.22	9.74	9.21	9.30
7083	NASDAQ	ATRO	Wed, Aug 26, 2020	9.46	9.56	9.17	9.22
7082	NASDAQ	ATRO	Tue, Aug 25, 2020	9.69	9.74	9.24	9.45
7081	NASDAQ	ATRO	Mon, Aug 24, 2020	9.41	9.66	9.18	9.58
7080	NASDAQ	ATRO	Fri, Aug 21, 2020	9.50	9.63	9.26	9.32
7079	NASDAQ	ATRO	Thu, Aug 20, 2020	9.69	9.83	9.56	9.62
7078	NASDAQ	ATRO	Wed, Aug 19, 2020	9.89	10.17	9.80	9.85
7077	NASDAQ	ATRO	Tue, Aug 18, 2020	10.08	10.19	9.65	9.83
7076	NASDAQ	ATRO	Mon, Aug 17, 2020	10.46	10.95	10.01	10.08
7075	NASDAQ	ATRO	Fri, Aug 14, 2020	10.02	10.46	9.98	10.33
7074	NASDAQ	ATRO	Thu, Aug 13, 2020	10.00	10.65	9.86	10.17
7073	NASDAQ	ATRO	Wed, Aug 12, 2020	10.92	11.01	9.85	10.13
7072	NASDAQ	ATRO	Tue, Aug 11, 2020	10.82	11.56	10.69	10.72
7071	NASDAQ	ATRO	Mon, Aug 10, 2020	10.79	10.96	10.38	10.60
7070	NASDAQ	ATRO	Fri, Aug 7, 2020	9.99	10.74	9.99	10.69
7069	NASDAQ	ATRO	Thu, Aug 6, 2020	9.67	10.16	9.52	10.12
7068	NASDAQ	ATRO	Wed, Aug 5, 2020	9.26	9.67	9.19	9.64
7067	NASDAQ	ATRO	Tue, Aug 4, 2020	8.80	9.19	8.80	9.16
7066	NASDAQ	ATRO	Mon, Aug 3, 2020	8.62	8.89	8.51	8.74
7065	NASDAQ	ATRO	Fri, Jul 31, 2020	8.64	8.92	8.12	8.70
7064	NASDAQ	ATRO	Thu, Jul 30, 2020	8.85	8.87	8.39	8.64
7063	NASDAQ	ATRO	Wed, Jul 29, 2020	9.05	9.18	8.78	8.81
7062	NASDAQ	ATRO	Tue, Jul 28, 2020	8.96	9.26	8.95	9.03
7061	NASDAQ	ATRO	Mon, Jul 27, 2020	8.93	9.11	8.79	8.99
7060	NASDAQ	ATRO	Fri, Jul 24, 2020	9.24	9.47	8.99	9.02
7059	NASDAQ	ATRO	Thu, Jul 23, 2020	9.26	9.63	9.02	9.32
7058	NASDAQ	ATRO	Wed, Jul 22, 2020	9.21	9.68	9.20	9.26
7057	NASDAQ	ATRO	Tue, Jul 21, 2020	9.49	9.80	9.13	9.28
7056	NASDAQ	ATRO	Mon, Jul 20, 2020	9.18	9.34	8.78	8.98
7055	NASDAQ	ATRO	Fri, Jul 17, 2020	9.51	9.68	9.28	9.32
7054	NASDAQ	ATRO	Thu, Jul 16, 2020	9.67	9.67	9.25	9.51
7053	NASDAQ	ATRO	Wed, Jul 15, 2020	9.55	9.94	9.55	9.71
7052	NASDAQ	ATRO	Tue, Jul 14, 2020	9.18	9.48	9.02	9.19
7051	NASDAQ	ATRO	Mon, Jul 13, 2020	9.34	9.69	9.01	9.23
7050	NASDAQ	ATRO	Fri, Jul 10, 2020	8.78	9.32	8.63	9.20
7049	NASDAQ	ATRO	Thu, Jul 9, 2020	9.58	10.22	8.82	8.85
7048	NASDAQ	ATRO	Wed, Jul 8, 2020	9.48	9.80	9.37	9.67
7047	NASDAQ	ATRO	Tue, Jul 7, 2020	10.18	10.41	9.52	9.56
7046	NASDAQ	ATRO	Mon, Jul 6, 2020	10.24	10.49	10.00	10.37
7045	NASDAQ	ATRO	Thu, Jul 2, 2020	10.48	10.70	9.87	9.91
7044	NASDAQ	ATRO	Wed, Jul 1, 2020	10.55	10.95	10.07	10.11
7043	NASDAQ	ATRO	Tue, Jun 30, 2020	10.66	10.85	10.33	10.56
7042	NASDAQ	ATRO	Mon, Jun 29, 2020	10.25	10.88	10.05	10.80
7041	NASDAQ	ATRO	Fri, Jun 26, 2020	10.06	10.53	9.63	10.03
7040	NASDAQ	ATRO	Thu, Jun 25, 2020	8.92	10.26	8.80	10.08
7039	NASDAQ	ATRO	Wed, Jun 24, 2020	10.36	10.38	9.26	9.30
7038	NASDAQ	ATRO	Tue, Jun 23, 2020	10.46	10.73	10.30	10.62
7037	NASDAQ	ATRO	Mon, Jun 22, 2020	10.06	10.45	9.64	10.28
7036	NASDAQ	ATRO	Fri, Jun 19, 2020	10.57	10.61	9.81	10.09
7035	NASDAQ	ATRO	Thu, Jun 18, 2020	10.12	10.79	9.97	10.28
7034	NASDAQ	ATRO	Wed, Jun 17, 2020	11.16	11.16	10.31	10.39
7033	NASDAQ	ATRO	Tue, Jun 16, 2020	11.83	11.99	10.93	11.15
7032	NASDAQ	ATRO	Mon, Jun 15, 2020	10.47	11.05	9.88	11.05
7031	NASDAQ	ATRO	Fri, Jun 12, 2020	11.22	11.46	10.68	11.11
7030	NASDAQ	ATRO	Thu, Jun 11, 2020	10.98	11.36	10.15	10.19
7029	NASDAQ	ATRO	Wed, Jun 10, 2020	13.31	13.35	11.37	12.09
7028	NASDAQ	ATRO	Tue, Jun 9, 2020	15.01	15.30	13.08	13.15
7027	NASDAQ	ATRO	Mon, Jun 8, 2020	15.89	16.80	15.05	15.46
7026	NASDAQ	ATRO	Fri, Jun 5, 2020	13.64	15.57	13.64	15.31
7025	NASDAQ	ATRO	Thu, Jun 4, 2020	11.81	12.66	11.42	12.52
7024	NASDAQ	ATRO	Wed, Jun 3, 2020	9.73	11.54	9.69	11.41
7023	NASDAQ	ATRO	Tue, Jun 2, 2020	9.49	9.83	9.47	9.57
7022	NASDAQ	ATRO	Mon, Jun 1, 2020	9.17	9.75	9.13	9.43
7021	NASDAQ	ATRO	Fri, May 29, 2020	9.16	9.45	8.67	9.13
7020	NASDAQ	ATRO	Thu, May 28, 2020	9.77	9.77	9.11	9.33
7019	NASDAQ	ATRO	Wed, May 27, 2020	9.85	10.05	9.20	9.36
7018	NASDAQ	ATRO	Tue, May 26, 2020	9.47	9.75	9.32	9.46
7017	NASDAQ	ATRO	Fri, May 22, 2020	9.43	9.43	8.80	9.00
7016	NASDAQ	ATRO	Thu, May 21, 2020	9.25	9.50	9.20	9.32
7015	NASDAQ	ATRO	Wed, May 20, 2020	8.82	9.35	8.81	9.17
7014	NASDAQ	ATRO	Tue, May 19, 2020	8.84	9.09	8.36	8.63
7013	NASDAQ	ATRO	Mon, May 18, 2020	8.14	8.95	8.14	8.89
7012	NASDAQ	ATRO	Fri, May 15, 2020	7.60	7.94	7.53	7.69
7011	NASDAQ	ATRO	Thu, May 14, 2020	7.58	7.97	7.10	7.71
7010	NASDAQ	ATRO	Wed, May 13, 2020	8.36	8.43	7.56	7.82
7009	NASDAQ	ATRO	Tue, May 12, 2020	8.32	9.09	8.32	8.53
7008	NASDAQ	ATRO	Mon, May 11, 2020	8.77	8.82	7.94	8.36
7007	NASDAQ	ATRO	Fri, May 8, 2020	8.12	8.94	8.12	8.78
7006	NASDAQ	ATRO	Thu, May 7, 2020	7.25	8.12	7.25	7.99
7005	NASDAQ	ATRO	Wed, May 6, 2020	7.70	7.95	7.09	7.14
7004	NASDAQ	ATRO	Tue, May 5, 2020	8.02	8.32	7.64	7.66
7003	NASDAQ	ATRO	Mon, May 4, 2020	8.62	8.71	7.84	7.90
7002	NASDAQ	ATRO	Fri, May 1, 2020	8.79	9.23	8.53	8.82
7001	NASDAQ	ATRO	Thu, Apr 30, 2020	9.34	9.76	8.97	8.98
7000	NASDAQ	ATRO	Wed, Apr 29, 2020	9.24	9.90	9.24	9.63
6999	NASDAQ	ATRO	Tue, Apr 28, 2020	8.84	9.18	8.49	8.84
6998	NASDAQ	ATRO	Mon, Apr 27, 2020	8.06	8.63	8.00	8.45
6997	NASDAQ	ATRO	Fri, Apr 24, 2020	8.07	8.29	7.67	7.98
6996	NASDAQ	ATRO	Thu, Apr 23, 2020	7.76	8.35	7.70	8.05
6995	NASDAQ	ATRO	Wed, Apr 22, 2020	7.85	8.09	7.60	7.62
6994	NASDAQ	ATRO	Tue, Apr 21, 2020	7.80	8.05	7.63	7.68
6993	NASDAQ	ATRO	Mon, Apr 20, 2020	7.90	8.30	7.76	8.09
6992	NASDAQ	ATRO	Fri, Apr 17, 2020	8.07	8.60	7.97	8.09
6991	NASDAQ	ATRO	Thu, Apr 16, 2020	8.55	8.55	7.47	7.52
6990	NASDAQ	ATRO	Wed, Apr 15, 2020	8.40	8.70	8.03	8.56
6989	NASDAQ	ATRO	Tue, Apr 14, 2020	9.28	9.55	8.73	8.82
6988	NASDAQ	ATRO	Mon, Apr 13, 2020	9.49	9.66	8.77	8.90
6987	NASDAQ	ATRO	Thu, Apr 9, 2020	9.55	10.22	9.46	9.57
6986	NASDAQ	ATRO	Wed, Apr 8, 2020	8.90	9.60	8.62	9.08
6985	NASDAQ	ATRO	Tue, Apr 7, 2020	8.91	9.50	8.22	8.50
6984	NASDAQ	ATRO	Mon, Apr 6, 2020	7.84	8.53	7.74	8.48
6983	NASDAQ	ATRO	Fri, Apr 3, 2020	7.77	8.10	7.12	7.37
6982	NASDAQ	ATRO	Thu, Apr 2, 2020	7.34	8.26	7.22	7.80
6981	NASDAQ	ATRO	Wed, Apr 1, 2020	8.67	8.76	7.32	7.41
6980	NASDAQ	ATRO	Tue, Mar 31, 2020	8.64	9.50	8.59	9.18
6979	NASDAQ	ATRO	Mon, Mar 30, 2020	9.34	9.34	8.04	8.49
6978	NASDAQ	ATRO	Fri, Mar 27, 2020	9.44	9.53	8.61	9.36
6977	NASDAQ	ATRO	Thu, Mar 26, 2020	8.42	9.83	8.35	9.74
6976	NASDAQ	ATRO	Wed, Mar 25, 2020	8.02	8.49	7.42	8.23
6975	NASDAQ	ATRO	Tue, Mar 24, 2020	7.58	8.41	7.35	7.55
6974	NASDAQ	ATRO	Mon, Mar 23, 2020	7.93	7.93	6.99	7.15
6973	NASDAQ	ATRO	Fri, Mar 20, 2020	10.26	10.74	7.14	7.37
6972	NASDAQ	ATRO	Thu, Mar 19, 2020	9.17	10.69	8.77	10.15
6971	NASDAQ	ATRO	Wed, Mar 18, 2020	11.42	11.87	8.83	9.25
6970	NASDAQ	ATRO	Tue, Mar 17, 2020	13.19	13.55	11.25	12.33
6969	NASDAQ	ATRO	Mon, Mar 16, 2020	8.00	14.50	8.00	12.95
6968	NASDAQ	ATRO	Fri, Mar 13, 2020	13.67	14.76	12.31	14.71
6967	NASDAQ	ATRO	Thu, Mar 12, 2020	15.35	15.63	12.74	12.94
6966	NASDAQ	ATRO	Wed, Mar 11, 2020	16.18	16.85	16.05	16.43
6965	NASDAQ	ATRO	Tue, Mar 10, 2020	17.29	17.63	15.91	16.75
6964	NASDAQ	ATRO	Mon, Mar 9, 2020	16.86	17.32	16.31	16.67
6963	NASDAQ	ATRO	Fri, Mar 6, 2020	17.60	18.44	17.30	18.21
6962	NASDAQ	ATRO	Thu, Mar 5, 2020	19.24	19.42	18.01	18.24
6961	NASDAQ	ATRO	Wed, Mar 4, 2020	19.94	20.46	19.21	19.79
6960	NASDAQ	ATRO	Tue, Mar 3, 2020	20.29	21.29	19.59	19.66
6959	NASDAQ	ATRO	Mon, Mar 2, 2020	20.30	20.45	19.44	20.22
6958	NASDAQ	ATRO	Fri, Feb 28, 2020	18.75	20.27	18.70	20.27
6957	NASDAQ	ATRO	Thu, Feb 27, 2020	20.85	21.97	19.65	19.69
6956	NASDAQ	ATRO	Wed, Feb 26, 2020	21.10	22.39	20.61	21.50
6955	NASDAQ	ATRO	Tue, Feb 25, 2020	24.01	24.01	22.60	22.73
6954	NASDAQ	ATRO	Mon, Feb 24, 2020	23.78	24.11	23.73	24.01
6953	NASDAQ	ATRO	Fri, Feb 21, 2020	24.09	24.64	23.83	24.55
6952	NASDAQ	ATRO	Thu, Feb 20, 2020	24.17	24.44	23.84	24.26
6951	NASDAQ	ATRO	Wed, Feb 19, 2020	24.31	24.73	24.09	24.22
6950	NASDAQ	ATRO	Tue, Feb 18, 2020	25.03	25.17	24.01	24.30
6949	NASDAQ	ATRO	Fri, Feb 14, 2020	25.44	25.51	25.06	25.19
6948	NASDAQ	ATRO	Thu, Feb 13, 2020	25.47	25.65	25.23	25.46
6947	NASDAQ	ATRO	Wed, Feb 12, 2020	25.47	25.72	25.20	25.65
6946	NASDAQ	ATRO	Tue, Feb 11, 2020	25.72	25.85	25.19	25.35
6945	NASDAQ	ATRO	Mon, Feb 10, 2020	25.44	25.83	25.28	25.64
6944	NASDAQ	ATRO	Fri, Feb 7, 2020	26.42	26.42	25.34	25.52
6943	NASDAQ	ATRO	Thu, Feb 6, 2020	26.87	26.91	26.30	26.54
6942	NASDAQ	ATRO	Wed, Feb 5, 2020	26.98	26.99	26.47	26.67
6941	NASDAQ	ATRO	Tue, Feb 4, 2020	26.53	27.21	26.53	26.71
6940	NASDAQ	ATRO	Mon, Feb 3, 2020	25.04	26.53	24.93	26.39
6939	NASDAQ	ATRO	Fri, Jan 31, 2020	26.21	26.22	25.14	25.20
6938	NASDAQ	ATRO	Thu, Jan 30, 2020	27.06	27.20	26.31	26.36
6937	NASDAQ	ATRO	Wed, Jan 29, 2020	28.07	28.18	27.30	27.31
6936	NASDAQ	ATRO	Tue, Jan 28, 2020	28.07	28.38	27.83	27.89
6935	NASDAQ	ATRO	Mon, Jan 27, 2020	27.84	28.12	27.50	28.00
6934	NASDAQ	ATRO	Fri, Jan 24, 2020	28.04	28.10	27.66	28.05
6933	NASDAQ	ATRO	Thu, Jan 23, 2020	27.84	28.21	27.72	28.02
6932	NASDAQ	ATRO	Wed, Jan 22, 2020	27.60	28.14	27.40	28.06
6931	NASDAQ	ATRO	Tue, Jan 21, 2020	28.70	28.76	27.98	28.21
6930	NASDAQ	ATRO	Fri, Jan 17, 2020	29.11	29.11	28.68	28.90
6929	NASDAQ	ATRO	Thu, Jan 16, 2020	28.85	29.00	28.64	28.92
6928	NASDAQ	ATRO	Wed, Jan 15, 2020	28.34	28.76	28.34	28.61
6927	NASDAQ	ATRO	Tue, Jan 14, 2020	28.09	28.62	27.91	28.35
6926	NASDAQ	ATRO	Mon, Jan 13, 2020	28.18	28.31	27.96	28.10
6925	NASDAQ	ATRO	Fri, Jan 10, 2020	28.24	28.30	27.97	28.07
6924	NASDAQ	ATRO	Thu, Jan 9, 2020	28.04	28.46	27.95	28.33
6923	NASDAQ	ATRO	Wed, Jan 8, 2020	28.29	28.29	27.51	28.09
6922	NASDAQ	ATRO	Tue, Jan 7, 2020	28.73	28.78	28.25	28.40
6921	NASDAQ	ATRO	Mon, Jan 6, 2020	28.49	28.97	28.24	28.92
6920	NASDAQ	ATRO	Fri, Jan 3, 2020	27.71	28.64	27.71	28.54
6919	NASDAQ	ATRO	Thu, Jan 2, 2020	28.15	28.34	27.55	27.96
6918	NASDAQ	ATRO	Tue, Dec 31, 2019	28.12	28.35	27.93	27.95
6917	NASDAQ	ATRO	Mon, Dec 30, 2019	28.33	28.38	27.97	28.23
6916	NASDAQ	ATRO	Fri, Dec 27, 2019	28.41	28.75	27.89	28.22
6915	NASDAQ	ATRO	Thu, Dec 26, 2019	28.32	28.52	28.03	28.30
6914	NASDAQ	ATRO	Tue, Dec 24, 2019	28.64	28.64	28.10	28.30
6913	NASDAQ	ATRO	Mon, Dec 23, 2019	28.61	28.78	28.14	28.47
6912	NASDAQ	ATRO	Fri, Dec 20, 2019	27.95	28.59	27.87	28.52
6911	NASDAQ	ATRO	Thu, Dec 19, 2019	29.11	29.11	27.92	28.09
6910	NASDAQ	ATRO	Wed, Dec 18, 2019	28.77	29.02	28.25	29.01
6909	NASDAQ	ATRO	Tue, Dec 17, 2019	28.94	29.01	28.50	28.76
6908	NASDAQ	ATRO	Mon, Dec 16, 2019	28.92	29.56	28.53	28.94
6907	NASDAQ	ATRO	Fri, Dec 13, 2019	29.39	29.53	28.94	29.26
6906	NASDAQ	ATRO	Thu, Dec 12, 2019	29.26	30.34	29.26	29.59
6905	NASDAQ	ATRO	Wed, Dec 11, 2019	29.25	29.51	29.12	29.35
6904	NASDAQ	ATRO	Tue, Dec 10, 2019	29.41	29.55	29.19	29.33
6903	NASDAQ	ATRO	Mon, Dec 9, 2019	29.86	30.00	29.15	29.45
6902	NASDAQ	ATRO	Fri, Dec 6, 2019	29.40	30.24	29.40	30.04
6901	NASDAQ	ATRO	Thu, Dec 5, 2019	28.84	29.41	28.74	29.28
6900	NASDAQ	ATRO	Wed, Dec 4, 2019	28.72	29.25	28.58	28.68
6899	NASDAQ	ATRO	Tue, Dec 3, 2019	28.45	28.82	28.35	28.68
6898	NASDAQ	ATRO	Mon, Dec 2, 2019	29.20	29.40	28.43	28.58
6897	NASDAQ	ATRO	Fri, Nov 29, 2019	29.83	29.95	29.14	29.15
6896	NASDAQ	ATRO	Wed, Nov 27, 2019	29.91	30.25	29.81	29.97
6895	NASDAQ	ATRO	Tue, Nov 26, 2019	29.64	30.10	29.48	29.89
6894	NASDAQ	ATRO	Mon, Nov 25, 2019	29.00	29.67	28.82	29.60
6893	NASDAQ	ATRO	Fri, Nov 22, 2019	29.67	29.72	28.84	28.89
6892	NASDAQ	ATRO	Thu, Nov 21, 2019	30.20	30.20	29.30	29.54
6891	NASDAQ	ATRO	Wed, Nov 20, 2019	30.33	30.64	30.01	30.12
6890	NASDAQ	ATRO	Tue, Nov 19, 2019	30.10	30.63	29.98	30.50
6889	NASDAQ	ATRO	Mon, Nov 18, 2019	30.57	30.72	29.77	29.89
6888	NASDAQ	ATRO	Fri, Nov 15, 2019	30.71	30.89	30.29	30.67
6887	NASDAQ	ATRO	Thu, Nov 14, 2019	29.87	30.60	29.84	30.52
6886	NASDAQ	ATRO	Wed, Nov 13, 2019	30.74	30.98	29.82	29.83
6885	NASDAQ	ATRO	Tue, Nov 12, 2019	31.06	31.47	30.69	31.02
6884	NASDAQ	ATRO	Mon, Nov 11, 2019	30.83	31.39	30.62	31.12
6883	NASDAQ	ATRO	Fri, Nov 8, 2019	30.94	31.56	30.86	31.07
6882	NASDAQ	ATRO	Thu, Nov 7, 2019	31.55	32.26	30.76	30.91
6881	NASDAQ	ATRO	Wed, Nov 6, 2019	30.92	31.85	30.42	31.35
6880	NASDAQ	ATRO	Tue, Nov 5, 2019	29.53	33.24	29.50	31.50
6879	NASDAQ	ATRO	Mon, Nov 4, 2019	31.30	31.63	31.01	31.08
6878	NASDAQ	ATRO	Fri, Nov 1, 2019	29.11	31.42	29.11	31.15
6877	NASDAQ	ATRO	Thu, Oct 31, 2019	28.53	29.12	28.24	28.94
6876	NASDAQ	ATRO	Wed, Oct 30, 2019	29.25	29.45	28.52	28.53
6875	NASDAQ	ATRO	Tue, Oct 29, 2019	29.39	29.67	29.05	29.25
6874	NASDAQ	ATRO	Mon, Oct 28, 2019	30.09	30.35	29.28	29.39
6873	NASDAQ	ATRO	Fri, Oct 25, 2019	29.74	30.34	29.51	30.05
6872	NASDAQ	ATRO	Thu, Oct 24, 2019	29.57	29.86	29.41	29.66
6871	NASDAQ	ATRO	Wed, Oct 23, 2019	29.03	29.59	28.87	29.45
6870	NASDAQ	ATRO	Tue, Oct 22, 2019	28.93	29.18	28.21	29.06
6869	NASDAQ	ATRO	Mon, Oct 21, 2019	29.49	30.12	28.99	29.01
6868	NASDAQ	ATRO	Fri, Oct 18, 2019	30.47	30.47	29.40	29.43
6867	NASDAQ	ATRO	Thu, Oct 17, 2019	30.56	31.19	30.30	30.41
6866	NASDAQ	ATRO	Wed, Oct 16, 2019	29.78	30.74	29.78	30.33
6865	NASDAQ	ATRO	Tue, Oct 15, 2019	29.42	29.94	29.16	29.89
6864	NASDAQ	ATRO	Mon, Oct 14, 2019	29.41	29.77	29.20	29.41
6863	NASDAQ	ATRO	Fri, Oct 11, 2019	29.37	30.02	29.28	29.56
6862	NASDAQ	ATRO	Thu, Oct 10, 2019	28.77	29.34	28.70	28.94
6861	NASDAQ	ATRO	Wed, Oct 9, 2019	28.76	28.99	28.55	28.80
6860	NASDAQ	ATRO	Tue, Oct 8, 2019	29.02	29.18	28.27	28.50
6859	NASDAQ	ATRO	Mon, Oct 7, 2019	29.31	29.65	29.11	29.19
6858	NASDAQ	ATRO	Fri, Oct 4, 2019	28.44	29.43	28.16	29.41
6857	NASDAQ	ATRO	Thu, Oct 3, 2019	28.28	28.54	27.75	28.35
6856	NASDAQ	ATRO	Wed, Oct 2, 2019	29.01	29.15	28.03	28.30
6855	NASDAQ	ATRO	Tue, Oct 1, 2019	29.59	30.13	28.73	29.14
6854	NASDAQ	ATRO	Mon, Sep 30, 2019	29.19	29.53	28.85	29.38
6853	NASDAQ	ATRO	Fri, Sep 27, 2019	29.04	29.17	28.48	29.00
6852	NASDAQ	ATRO	Thu, Sep 26, 2019	29.65	29.93	28.80	28.90
6851	NASDAQ	ATRO	Wed, Sep 25, 2019	29.93	30.28	29.58	29.65
6850	NASDAQ	ATRO	Tue, Sep 24, 2019	30.65	30.99	29.55	30.05
6849	NASDAQ	ATRO	Mon, Sep 23, 2019	31.28	31.43	30.29	30.64
6848	NASDAQ	ATRO	Fri, Sep 20, 2019	32.07	32.81	31.04	31.19
6847	NASDAQ	ATRO	Thu, Sep 19, 2019	32.31	33.02	31.90	31.92
6846	NASDAQ	ATRO	Wed, Sep 18, 2019	31.67	32.34	31.27	32.27
6845	NASDAQ	ATRO	Tue, Sep 17, 2019	30.93	31.25	30.36	31.17
6844	NASDAQ	ATRO	Mon, Sep 16, 2019	31.11	32.01	30.60	31.21
6843	NASDAQ	ATRO	Fri, Sep 13, 2019	29.98	31.21	29.81	31.10
6842	NASDAQ	ATRO	Thu, Sep 12, 2019	29.72	29.95	29.31	29.82
6841	NASDAQ	ATRO	Wed, Sep 11, 2019	28.44	29.63	28.02	29.55
6840	NASDAQ	ATRO	Tue, Sep 10, 2019	27.51	28.39	27.39	28.37
6839	NASDAQ	ATRO	Mon, Sep 9, 2019	27.59	27.84	27.31	27.53
6838	NASDAQ	ATRO	Fri, Sep 6, 2019	28.24	28.57	27.41	27.56
6837	NASDAQ	ATRO	Thu, Sep 5, 2019	27.64	28.70	27.60	28.18
6836	NASDAQ	ATRO	Wed, Sep 4, 2019	27.83	28.10	27.42	27.50
6835	NASDAQ	ATRO	Tue, Sep 3, 2019	27.23	27.83	26.98	27.58
6834	NASDAQ	ATRO	Fri, Aug 30, 2019	28.11	28.60	27.47	27.51
6833	NASDAQ	ATRO	Thu, Aug 29, 2019	27.62	28.26	27.36	27.90
6832	NASDAQ	ATRO	Wed, Aug 28, 2019	26.77	27.52	26.54	27.28
6831	NASDAQ	ATRO	Tue, Aug 27, 2019	27.61	27.61	26.67	26.90
6830	NASDAQ	ATRO	Mon, Aug 26, 2019	28.01	28.14	27.18	27.53
6829	NASDAQ	ATRO	Fri, Aug 23, 2019	27.58	28.42	27.33	27.68
6828	NASDAQ	ATRO	Thu, Aug 22, 2019	27.61	28.02	27.38	27.78
6827	NASDAQ	ATRO	Wed, Aug 21, 2019	27.03	27.76	26.60	27.53
6826	NASDAQ	ATRO	Tue, Aug 20, 2019	26.33	26.98	26.15	26.75
6825	NASDAQ	ATRO	Mon, Aug 19, 2019	26.80	26.88	26.32	26.44
6824	NASDAQ	ATRO	Fri, Aug 16, 2019	26.71	27.04	26.49	26.50
6823	NASDAQ	ATRO	Thu, Aug 15, 2019	26.06	26.73	25.93	26.41
6822	NASDAQ	ATRO	Wed, Aug 14, 2019	26.48	26.49	25.85	26.08
6821	NASDAQ	ATRO	Tue, Aug 13, 2019	26.15	27.53	26.11	26.97
6820	NASDAQ	ATRO	Mon, Aug 12, 2019	27.24	27.30	26.12	26.14
6819	NASDAQ	ATRO	Fri, Aug 9, 2019	28.39	28.39	27.31	27.51
6818	NASDAQ	ATRO	Thu, Aug 8, 2019	27.77	28.45	27.43	28.37
6817	NASDAQ	ATRO	Wed, Aug 7, 2019	27.26	28.09	27.20	27.64
6816	NASDAQ	ATRO	Tue, Aug 6, 2019	28.00	28.45	26.60	27.21
6815	NASDAQ	ATRO	Mon, Aug 5, 2019	31.75	32.12	27.63	28.00
6814	NASDAQ	ATRO	Fri, Aug 2, 2019	36.00	36.40	35.25	35.56
6813	NASDAQ	ATRO	Thu, Aug 1, 2019	36.86	37.73	36.04	36.12
6812	NASDAQ	ATRO	Wed, Jul 31, 2019	37.49	38.04	36.83	36.84
6811	NASDAQ	ATRO	Tue, Jul 30, 2019	37.11	37.50	36.72	37.43
6810	NASDAQ	ATRO	Mon, Jul 29, 2019	37.83	38.02	37.17	37.28
6809	NASDAQ	ATRO	Fri, Jul 26, 2019	38.31	38.40	37.76	37.82
6808	NASDAQ	ATRO	Thu, Jul 25, 2019	38.20	38.66	37.92	38.21
6807	NASDAQ	ATRO	Wed, Jul 24, 2019	37.98	38.60	37.93	38.26
6806	NASDAQ	ATRO	Tue, Jul 23, 2019	37.82	38.41	37.38	38.00
6805	NASDAQ	ATRO	Mon, Jul 22, 2019	37.95	38.24	37.38	37.68
6804	NASDAQ	ATRO	Fri, Jul 19, 2019	38.01	39.08	37.89	37.91
6803	NASDAQ	ATRO	Thu, Jul 18, 2019	38.13	38.29	37.82	38.00
6802	NASDAQ	ATRO	Wed, Jul 17, 2019	38.72	38.72	38.02	38.13
6801	NASDAQ	ATRO	Tue, Jul 16, 2019	38.78	39.04	38.18	38.61
6800	NASDAQ	ATRO	Mon, Jul 15, 2019	39.00	39.26	38.19	38.72
6799	NASDAQ	ATRO	Fri, Jul 12, 2019	38.09	39.04	38.02	38.99
6798	NASDAQ	ATRO	Thu, Jul 11, 2019	39.09	39.29	38.03	38.20
6797	NASDAQ	ATRO	Wed, Jul 10, 2019	39.85	40.19	38.74	38.94
6796	NASDAQ	ATRO	Tue, Jul 9, 2019	39.70	40.04	39.30	39.59
6795	NASDAQ	ATRO	Mon, Jul 8, 2019	40.70	40.77	39.32	39.84
6794	NASDAQ	ATRO	Fri, Jul 5, 2019	40.90	40.97	40.11	40.87
6793	NASDAQ	ATRO	Wed, Jul 3, 2019	41.11	41.43	40.54	41.01
6792	NASDAQ	ATRO	Tue, Jul 2, 2019	41.99	41.99	40.67	41.00
6791	NASDAQ	ATRO	Mon, Jul 1, 2019	41.47	42.08	40.70	41.86
6790	NASDAQ	ATRO	Fri, Jun 28, 2019	41.56	41.86	39.98	40.22
6789	NASDAQ	ATRO	Thu, Jun 27, 2019	40.67	41.97	40.67	41.50
6788	NASDAQ	ATRO	Wed, Jun 26, 2019	41.32	41.45	40.76	40.78
6787	NASDAQ	ATRO	Tue, Jun 25, 2019	40.37	41.70	40.08	40.98
6786	NASDAQ	ATRO	Mon, Jun 24, 2019	39.09	40.65	39.09	40.41
6785	NASDAQ	ATRO	Fri, Jun 21, 2019	38.71	39.19	37.55	39.09
6784	NASDAQ	ATRO	Thu, Jun 20, 2019	39.41	39.41	38.27	38.82
6783	NASDAQ	ATRO	Wed, Jun 19, 2019	39.31	39.52	38.40	38.87
6782	NASDAQ	ATRO	Tue, Jun 18, 2019	38.96	39.63	38.61	39.09
6781	NASDAQ	ATRO	Mon, Jun 17, 2019	39.72	39.72	37.90	38.85
6780	NASDAQ	ATRO	Fri, Jun 14, 2019	42.65	42.65	38.65	39.49
6779	NASDAQ	ATRO	Thu, Jun 13, 2019	43.73	44.22	43.30	44.20
6778	NASDAQ	ATRO	Wed, Jun 12, 2019	43.07	43.75	42.71	43.35
6777	NASDAQ	ATRO	Tue, Jun 11, 2019	42.42	42.98	42.30	42.94
6776	NASDAQ	ATRO	Mon, Jun 10, 2019	43.00	43.00	42.22	42.27
6775	NASDAQ	ATRO	Fri, Jun 7, 2019	43.78	43.89	42.71	42.73
6774	NASDAQ	ATRO	Thu, Jun 6, 2019	43.50	44.34	43.11	43.75
6773	NASDAQ	ATRO	Wed, Jun 5, 2019	41.64	43.42	41.64	43.37
6772	NASDAQ	ATRO	Tue, Jun 4, 2019	41.73	42.10	41.24	41.40
6771	NASDAQ	ATRO	Mon, Jun 3, 2019	40.56	41.54	40.51	41.23
6770	NASDAQ	ATRO	Fri, May 31, 2019	40.49	40.93	40.24	40.67
6769	NASDAQ	ATRO	Thu, May 30, 2019	40.95	41.24	40.59	40.93
6768	NASDAQ	ATRO	Wed, May 29, 2019	41.46	41.76	40.51	40.73
6767	NASDAQ	ATRO	Tue, May 28, 2019	41.58	41.95	41.17	41.81
6766	NASDAQ	ATRO	Fri, May 24, 2019	41.80	41.87	40.84	41.39
6765	NASDAQ	ATRO	Thu, May 23, 2019	42.10	42.17	41.14	41.54
6764	NASDAQ	ATRO	Wed, May 22, 2019	42.73	42.92	42.34	42.57
6763	NASDAQ	ATRO	Tue, May 21, 2019	42.29	42.94	41.95	42.92
6762	NASDAQ	ATRO	Mon, May 20, 2019	41.41	42.24	41.05	41.92
6761	NASDAQ	ATRO	Fri, May 17, 2019	41.64	41.91	41.19	41.35
6760	NASDAQ	ATRO	Thu, May 16, 2019	41.62	42.48	41.62	42.07
6759	NASDAQ	ATRO	Wed, May 15, 2019	40.34	41.72	40.12	41.69
6758	NASDAQ	ATRO	Tue, May 14, 2019	39.57	40.51	39.44	40.39
6757	NASDAQ	ATRO	Mon, May 13, 2019	39.17	39.82	38.57	39.33
6756	NASDAQ	ATRO	Fri, May 10, 2019	39.55	39.65	39.13	39.47
6755	NASDAQ	ATRO	Thu, May 9, 2019	38.00	40.00	37.92	39.68
6754	NASDAQ	ATRO	Wed, May 8, 2019	35.75	38.49	35.08	38.25
6753	NASDAQ	ATRO	Tue, May 7, 2019	33.17	33.76	32.74	32.92
6752	NASDAQ	ATRO	Mon, May 6, 2019	32.97	33.57	32.97	33.45
6751	NASDAQ	ATRO	Fri, May 3, 2019	33.07	33.55	32.84	33.49
6750	NASDAQ	ATRO	Thu, May 2, 2019	33.26	33.39	32.69	32.89
6749	NASDAQ	ATRO	Wed, May 1, 2019	33.85	34.27	33.24	33.28
6748	NASDAQ	ATRO	Tue, Apr 30, 2019	33.52	33.68	32.99	33.34
6747	NASDAQ	ATRO	Mon, Apr 29, 2019	33.10	33.80	33.01	33.50
6746	NASDAQ	ATRO	Fri, Apr 26, 2019	32.97	33.51	32.86	33.13
6745	NASDAQ	ATRO	Thu, Apr 25, 2019	32.88	33.00	32.25	32.97
6744	NASDAQ	ATRO	Wed, Apr 24, 2019	33.07	33.39	32.94	33.02
6743	NASDAQ	ATRO	Tue, Apr 23, 2019	32.35	33.23	32.35	33.13
6742	NASDAQ	ATRO	Mon, Apr 22, 2019	32.05	32.45	31.50	32.25
6741	NASDAQ	ATRO	Thu, Apr 18, 2019	31.66	32.23	31.58	32.11
6740	NASDAQ	ATRO	Wed, Apr 17, 2019	32.66	32.70	31.40	31.69
6739	NASDAQ	ATRO	Tue, Apr 16, 2019	32.61	32.83	32.37	32.50
6738	NASDAQ	ATRO	Mon, Apr 15, 2019	32.86	32.99	32.40	32.45
6737	NASDAQ	ATRO	Fri, Apr 12, 2019	33.17	33.17	32.76	32.81
6736	NASDAQ	ATRO	Thu, Apr 11, 2019	32.75	33.10	32.70	32.81
6735	NASDAQ	ATRO	Wed, Apr 10, 2019	32.59	32.82	32.21	32.76
6734	NASDAQ	ATRO	Tue, Apr 9, 2019	33.26	33.26	32.49	32.54
6733	NASDAQ	ATRO	Mon, Apr 8, 2019	33.23	33.51	32.71	33.47
6732	NASDAQ	ATRO	Fri, Apr 5, 2019	33.23	33.94	33.23	33.42
6731	NASDAQ	ATRO	Thu, Apr 4, 2019	32.92	33.51	32.92	33.23
6730	NASDAQ	ATRO	Wed, Apr 3, 2019	33.06	33.14	32.66	32.91
6729	NASDAQ	ATRO	Tue, Apr 2, 2019	33.31	33.45	32.77	32.90
6728	NASDAQ	ATRO	Mon, Apr 1, 2019	33.40	34.18	33.14	33.25
6727	NASDAQ	ATRO	Fri, Mar 29, 2019	31.74	32.79	31.57	32.72
6726	NASDAQ	ATRO	Thu, Mar 28, 2019	30.54	31.60	30.49	31.59
6725	NASDAQ	ATRO	Wed, Mar 27, 2019	30.83	31.05	30.13	30.53
6724	NASDAQ	ATRO	Tue, Mar 26, 2019	31.10	31.98	30.64	30.87
6723	NASDAQ	ATRO	Mon, Mar 25, 2019	30.15	30.88	29.92	30.84
6722	NASDAQ	ATRO	Fri, Mar 22, 2019	31.60	31.61	30.33	30.36
6721	NASDAQ	ATRO	Thu, Mar 21, 2019	31.33	31.97	31.15	31.80
6720	NASDAQ	ATRO	Wed, Mar 20, 2019	31.91	31.91	31.32	31.37
6719	NASDAQ	ATRO	Tue, Mar 19, 2019	32.65	32.65	31.71	31.91
6718	NASDAQ	ATRO	Mon, Mar 18, 2019	31.10	32.50	31.03	32.42
6717	NASDAQ	ATRO	Fri, Mar 15, 2019	31.77	31.99	31.06	31.08
6716	NASDAQ	ATRO	Thu, Mar 14, 2019	31.71	32.13	31.63	31.75
6715	NASDAQ	ATRO	Wed, Mar 13, 2019	31.30	32.06	31.16	31.71
6714	NASDAQ	ATRO	Tue, Mar 12, 2019	31.61	31.74	31.05	31.14
6713	NASDAQ	ATRO	Mon, Mar 11, 2019	31.85	31.85	30.83	31.64
6712	NASDAQ	ATRO	Fri, Mar 8, 2019	32.04	32.46	31.83	32.35
6711	NASDAQ	ATRO	Thu, Mar 7, 2019	32.51	32.68	31.65	32.31
6710	NASDAQ	ATRO	Wed, Mar 6, 2019	33.25	33.38	32.30	32.44
6709	NASDAQ	ATRO	Tue, Mar 5, 2019	33.57	33.93	33.28	33.28
6708	NASDAQ	ATRO	Mon, Mar 4, 2019	35.30	35.40	33.54	33.63
6707	NASDAQ	ATRO	Fri, Mar 1, 2019	36.11	36.11	35.18	35.31
6706	NASDAQ	ATRO	Thu, Feb 28, 2019	35.96	36.12	35.49	35.97
6705	NASDAQ	ATRO	Wed, Feb 27, 2019	35.63	36.09	35.04	35.96
6704	NASDAQ	ATRO	Tue, Feb 26, 2019	35.97	36.27	33.61	35.85
6703	NASDAQ	ATRO	Mon, Feb 25, 2019	35.28	36.81	35.28	36.01
6702	NASDAQ	ATRO	Fri, Feb 22, 2019	35.50	35.60	34.30	35.04
6701	NASDAQ	ATRO	Thu, Feb 21, 2019	34.50	35.51	33.33	35.47
6700	NASDAQ	ATRO	Wed, Feb 20, 2019	33.88	34.89	33.73	34.50
6699	NASDAQ	ATRO	Tue, Feb 19, 2019	33.59	34.27	33.32	34.20
6698	NASDAQ	ATRO	Fri, Feb 15, 2019	32.77	33.96	32.40	33.76
6697	NASDAQ	ATRO	Thu, Feb 14, 2019	33.30	33.62	32.50	32.56
6696	NASDAQ	ATRO	Wed, Feb 13, 2019	34.64	34.83	33.80	33.82
6695	NASDAQ	ATRO	Tue, Feb 12, 2019	34.17	34.70	34.08	34.41
6694	NASDAQ	ATRO	Mon, Feb 11, 2019	32.75	34.09	32.75	34.00
6693	NASDAQ	ATRO	Fri, Feb 8, 2019	32.07	32.77	31.29	32.69
6692	NASDAQ	ATRO	Thu, Feb 7, 2019	32.20	32.50	31.75	32.19
6691	NASDAQ	ATRO	Wed, Feb 6, 2019	32.08	32.55	31.64	32.50
6690	NASDAQ	ATRO	Tue, Feb 5, 2019	30.85	32.21	30.80	32.17
6689	NASDAQ	ATRO	Mon, Feb 4, 2019	30.65	30.71	30.40	30.60
6688	NASDAQ	ATRO	Fri, Feb 1, 2019	30.75	30.79	30.20	30.51
6687	NASDAQ	ATRO	Thu, Jan 31, 2019	30.75	31.09	30.53	30.67
6686	NASDAQ	ATRO	Wed, Jan 30, 2019	31.00	31.00	30.32	30.75
6685	NASDAQ	ATRO	Tue, Jan 29, 2019	30.48	31.02	30.16	30.74
6684	NASDAQ	ATRO	Mon, Jan 28, 2019	30.36	30.75	29.97	30.47
6683	NASDAQ	ATRO	Fri, Jan 25, 2019	30.83	31.16	30.56	30.61
6682	NASDAQ	ATRO	Thu, Jan 24, 2019	30.30	31.19	29.90	30.64
6681	NASDAQ	ATRO	Wed, Jan 23, 2019	29.99	30.67	29.40	30.24
6680	NASDAQ	ATRO	Tue, Jan 22, 2019	30.38	30.64	29.47	29.85
6679	NASDAQ	ATRO	Fri, Jan 18, 2019	30.41	31.00	30.34	30.67
6678	NASDAQ	ATRO	Thu, Jan 17, 2019	30.00	30.49	30.00	30.33
6677	NASDAQ	ATRO	Wed, Jan 16, 2019	30.62	30.78	30.15	30.16
6676	NASDAQ	ATRO	Tue, Jan 15, 2019	30.54	30.75	30.35	30.61
6675	NASDAQ	ATRO	Mon, Jan 14, 2019	30.85	31.23	30.51	30.53
6674	NASDAQ	ATRO	Fri, Jan 11, 2019	30.56	31.13	30.50	31.03
6673	NASDAQ	ATRO	Thu, Jan 10, 2019	30.64	30.93	30.36	30.84
6672	NASDAQ	ATRO	Wed, Jan 9, 2019	30.37	31.17	30.37	30.97
6671	NASDAQ	ATRO	Tue, Jan 8, 2019	30.35	30.44	29.94	30.38
6670	NASDAQ	ATRO	Mon, Jan 7, 2019	29.00	30.21	28.75	30.01
6669	NASDAQ	ATRO	Fri, Jan 4, 2019	29.04	29.30	28.58	28.96
6668	NASDAQ	ATRO	Thu, Jan 3, 2019	30.54	30.96	28.49	28.55
6667	NASDAQ	ATRO	Wed, Jan 2, 2019	29.99	31.00	29.92	30.66
6666	NASDAQ	ATRO	Mon, Dec 31, 2018	30.39	30.83	30.24	30.45
6665	NASDAQ	ATRO	Fri, Dec 28, 2018	30.34	30.91	29.96	30.35
6664	NASDAQ	ATRO	Thu, Dec 27, 2018	29.52	30.34	29.14	30.30
6663	NASDAQ	ATRO	Wed, Dec 26, 2018	28.81	30.12	28.24	30.03
6662	NASDAQ	ATRO	Mon, Dec 24, 2018	30.32	30.45	28.36	28.60
6661	NASDAQ	ATRO	Fri, Dec 21, 2018	31.52	32.19	29.69	30.55
6660	NASDAQ	ATRO	Thu, Dec 20, 2018	31.13	31.92	31.04	31.50
6659	NASDAQ	ATRO	Wed, Dec 19, 2018	31.98	32.46	31.07	31.30
6658	NASDAQ	ATRO	Tue, Dec 18, 2018	31.69	32.25	31.36	31.87
6657	NASDAQ	ATRO	Mon, Dec 17, 2018	31.71	32.17	31.38	31.50
6656	NASDAQ	ATRO	Fri, Dec 14, 2018	31.32	32.29	31.32	31.77
6655	NASDAQ	ATRO	Thu, Dec 13, 2018	31.69	31.75	31.37	31.66
6654	NASDAQ	ATRO	Wed, Dec 12, 2018	31.68	31.79	31.03	31.57
6653	NASDAQ	ATRO	Tue, Dec 11, 2018	31.37	31.47	30.76	31.34
6652	NASDAQ	ATRO	Mon, Dec 10, 2018	30.39	31.05	30.11	30.80
6651	NASDAQ	ATRO	Fri, Dec 7, 2018	31.17	31.31	29.96	30.39
6650	NASDAQ	ATRO	Thu, Dec 6, 2018	31.48	31.65	30.19	31.18
6649	NASDAQ	ATRO	Tue, Dec 4, 2018	33.03	33.03	31.50	31.87
6648	NASDAQ	ATRO	Mon, Dec 3, 2018	32.96	33.18	32.50	33.02
6647	NASDAQ	ATRO	Fri, Nov 30, 2018	31.54	32.46	31.33	32.46
6646	NASDAQ	ATRO	Thu, Nov 29, 2018	31.72	32.00	31.10	31.53
6645	NASDAQ	ATRO	Wed, Nov 28, 2018	31.22	31.99	30.98	31.73
6644	NASDAQ	ATRO	Tue, Nov 27, 2018	31.49	31.51	30.83	31.03
6643	NASDAQ	ATRO	Mon, Nov 26, 2018	31.15	31.85	31.15	31.72
6642	NASDAQ	ATRO	Fri, Nov 23, 2018	30.28	31.16	30.28	30.91
6641	NASDAQ	ATRO	Wed, Nov 21, 2018	30.58	31.18	30.23	30.57
6640	NASDAQ	ATRO	Tue, Nov 20, 2018	29.51	30.47	29.21	30.30
6639	NASDAQ	ATRO	Mon, Nov 19, 2018	31.39	31.39	29.85	30.00
6638	NASDAQ	ATRO	Fri, Nov 16, 2018	30.99	31.49	29.81	31.41
6637	NASDAQ	ATRO	Thu, Nov 15, 2018	29.88	31.33	29.46	31.28
6636	NASDAQ	ATRO	Wed, Nov 14, 2018	28.74	30.42	28.74	29.90
6635	NASDAQ	ATRO	Tue, Nov 13, 2018	28.76	28.85	28.24	28.46
6634	NASDAQ	ATRO	Mon, Nov 12, 2018	29.85	29.85	28.54	28.63
6633	NASDAQ	ATRO	Fri, Nov 9, 2018	30.01	30.26	28.87	29.73
6632	NASDAQ	ATRO	Thu, Nov 8, 2018	29.98	31.40	29.76	30.05
6631	NASDAQ	ATRO	Wed, Nov 7, 2018	29.06	30.18	28.71	29.98
6630	NASDAQ	ATRO	Tue, Nov 6, 2018	29.78	30.13	27.56	29.00
6629	NASDAQ	ATRO	Mon, Nov 5, 2018	29.81	30.24	29.81	30.11
6628	NASDAQ	ATRO	Fri, Nov 2, 2018	29.58	30.09	29.21	29.90
6627	NASDAQ	ATRO	Thu, Nov 1, 2018	29.29	29.54	29.15	29.34
6626	NASDAQ	ATRO	Wed, Oct 31, 2018	29.54	29.75	29.08	29.16
6625	NASDAQ	ATRO	Tue, Oct 30, 2018	29.19	29.66	28.89	29.23
6624	NASDAQ	ATRO	Mon, Oct 29, 2018	30.57	31.53	28.92	29.17
6623	NASDAQ	ATRO	Fri, Oct 26, 2018	30.08	31.56	30.08	30.15
6622	NASDAQ	ATRO	Thu, Oct 25, 2018	31.93	31.93	30.40	30.55
6621	NASDAQ	ATRO	Wed, Oct 24, 2018	32.72	33.21	31.72	31.72
6620	NASDAQ	ATRO	Tue, Oct 23, 2018	32.36	32.90	32.10	32.70
6619	NASDAQ	ATRO	Mon, Oct 22, 2018	32.67	33.26	32.56	32.96
6618	NASDAQ	ATRO	Fri, Oct 19, 2018	32.95	33.25	32.15	32.67
6617	NASDAQ	ATRO	Thu, Oct 18, 2018	33.79	33.83	32.77	32.89
6616	NASDAQ	ATRO	Wed, Oct 17, 2018	34.23	34.60	33.66	33.90
6615	NASDAQ	ATRO	Tue, Oct 16, 2018	33.26	34.69	32.66	34.58
6614	NASDAQ	ATRO	Mon, Oct 15, 2018	32.17	33.48	32.00	33.38
6613	NASDAQ	ATRO	Fri, Oct 12, 2018	32.24	33.13	31.78	32.08
6612	NASDAQ	ATRO	Thu, Oct 11, 2018	36.26	36.36	32.10	32.17
6611	NASDAQ	ATRO	Wed, Oct 10, 2018	34.97	35.42	32.77	32.83
6610	NASDAQ	ATRO	Tue, Oct 9, 2018	35.29	35.57	34.48	35.12
6609	NASDAQ	ATRO	Mon, Oct 8, 2018	35.22	35.54	34.92	35.36
6608	NASDAQ	ATRO	Fri, Oct 5, 2018	36.31	36.31	34.63	35.18
6607	NASDAQ	ATRO	Thu, Oct 4, 2018	36.81	36.81	36.04	36.31
6606	NASDAQ	ATRO	Wed, Oct 3, 2018	36.65	37.31	36.65	36.78
6605	NASDAQ	ATRO	Tue, Oct 2, 2018	37.83	38.04	36.49	36.54
6604	NASDAQ	ATRO	Mon, Oct 1, 2018	37.97	38.14	37.70	37.80
6603	NASDAQ	ATRO	Fri, Sep 28, 2018	37.66	38.17	37.24	37.83
6602	NASDAQ	ATRO	Thu, Sep 27, 2018	37.49	38.26	37.30	37.62
6601	NASDAQ	ATRO	Wed, Sep 26, 2018	37.63	37.77	37.15	37.31
6600	NASDAQ	ATRO	Tue, Sep 25, 2018	37.83	38.20	36.80	37.53
6599	NASDAQ	ATRO	Mon, Sep 24, 2018	37.97	38.44	37.42	37.78
6598	NASDAQ	ATRO	Fri, Sep 21, 2018	37.70	38.30	37.42	37.78
6597	NASDAQ	ATRO	Thu, Sep 20, 2018	38.30	38.30	37.33	37.62
6596	NASDAQ	ATRO	Wed, Sep 19, 2018	37.86	38.39	37.71	38.14
6595	NASDAQ	ATRO	Tue, Sep 18, 2018	37.84	38.22	37.36	37.86
6594	NASDAQ	ATRO	Mon, Sep 17, 2018	37.70	38.01	36.95	37.67
6593	NASDAQ	ATRO	Fri, Sep 14, 2018	37.48	38.35	37.48	37.76
6592	NASDAQ	ATRO	Thu, Sep 13, 2018	37.47	37.97	37.36	37.49
6591	NASDAQ	ATRO	Wed, Sep 12, 2018	37.86	38.17	37.09	37.34
6590	NASDAQ	ATRO	Tue, Sep 11, 2018	38.20	38.26	37.57	37.81
6589	NASDAQ	ATRO	Mon, Sep 10, 2018	38.38	38.70	38.11	38.26
6588	NASDAQ	ATRO	Fri, Sep 7, 2018	37.89	38.37	37.70	38.26
6587	NASDAQ	ATRO	Thu, Sep 6, 2018	38.33	38.70	37.90	38.05
6586	NASDAQ	ATRO	Wed, Sep 5, 2018	37.45	38.60	37.22	38.23
6585	NASDAQ	ATRO	Tue, Sep 4, 2018	37.90	38.09	36.09	37.55
6584	NASDAQ	ATRO	Fri, Aug 31, 2018	37.93	38.12	37.01	37.83
6583	NASDAQ	ATRO	Thu, Aug 30, 2018	38.47	38.77	37.90	38.17
6582	NASDAQ	ATRO	Wed, Aug 29, 2018	38.88	38.90	38.38	38.57
6581	NASDAQ	ATRO	Tue, Aug 28, 2018	39.14	39.19	38.67	38.95
6580	NASDAQ	ATRO	Mon, Aug 27, 2018	39.33	39.77	38.98	39.13
6579	NASDAQ	ATRO	Fri, Aug 24, 2018	39.73	39.73	38.98	39.12
6578	NASDAQ	ATRO	Thu, Aug 23, 2018	40.05	40.26	39.30	39.55
6577	NASDAQ	ATRO	Wed, Aug 22, 2018	40.00	40.49	39.60	40.10
6576	NASDAQ	ATRO	Tue, Aug 21, 2018	39.03	40.16	39.03	40.09
6575	NASDAQ	ATRO	Mon, Aug 20, 2018	38.75	39.34	38.70	39.01
6574	NASDAQ	ATRO	Fri, Aug 17, 2018	38.55	38.97	38.22	38.73
6573	NASDAQ	ATRO	Thu, Aug 16, 2018	38.69	38.82	38.28	38.67
6572	NASDAQ	ATRO	Wed, Aug 15, 2018	39.30	39.30	37.78	38.47
6571	NASDAQ	ATRO	Tue, Aug 14, 2018	39.23	40.26	38.62	39.50
6570	NASDAQ	ATRO	Mon, Aug 13, 2018	39.19	39.64	38.88	39.14
6569	NASDAQ	ATRO	Fri, Aug 10, 2018	38.53	39.32	38.40	39.08
6568	NASDAQ	ATRO	Thu, Aug 9, 2018	38.00	38.93	37.98	38.77
6567	NASDAQ	ATRO	Wed, Aug 8, 2018	38.04	38.43	37.72	37.89
6566	NASDAQ	ATRO	Tue, Aug 7, 2018	37.93	38.45	37.12	38.03
6565	NASDAQ	ATRO	Mon, Aug 6, 2018	36.30	37.96	35.83	37.71
6564	NASDAQ	ATRO	Fri, Aug 3, 2018	36.66	39.86	35.97	36.17
6563	NASDAQ	ATRO	Thu, Aug 2, 2018	34.37	34.71	34.14	34.39
6562	NASDAQ	ATRO	Wed, Aug 1, 2018	35.65	35.76	34.44	34.53
6561	NASDAQ	ATRO	Tue, Jul 31, 2018	34.30	35.83	33.80	35.66
6560	NASDAQ	ATRO	Mon, Jul 30, 2018	34.47	35.48	34.09	34.12
6559	NASDAQ	ATRO	Fri, Jul 27, 2018	35.28	35.96	34.12	34.43
6558	NASDAQ	ATRO	Thu, Jul 26, 2018	33.96	35.93	33.64	35.22
6557	NASDAQ	ATRO	Wed, Jul 25, 2018	33.93	34.00	33.35	33.88
6556	NASDAQ	ATRO	Tue, Jul 24, 2018	34.19	34.43	33.66	33.92
6555	NASDAQ	ATRO	Mon, Jul 23, 2018	34.39	34.55	33.91	34.00
6554	NASDAQ	ATRO	Fri, Jul 20, 2018	34.22	34.69	34.22	34.43
6553	NASDAQ	ATRO	Thu, Jul 19, 2018	33.77	34.31	33.77	34.26
6552	NASDAQ	ATRO	Wed, Jul 18, 2018	33.43	33.90	33.03	33.88
6551	NASDAQ	ATRO	Tue, Jul 17, 2018	33.24	33.57	33.23	33.45
6550	NASDAQ	ATRO	Mon, Jul 16, 2018	33.30	33.62	33.02	33.26
6549	NASDAQ	ATRO	Fri, Jul 13, 2018	32.77	33.56	32.54	33.26
6548	NASDAQ	ATRO	Thu, Jul 12, 2018	32.25	32.83	31.88	32.76
6547	NASDAQ	ATRO	Wed, Jul 11, 2018	32.59	33.00	32.01	32.05
6546	NASDAQ	ATRO	Tue, Jul 10, 2018	32.88	33.00	32.17	32.77
6545	NASDAQ	ATRO	Mon, Jul 9, 2018	31.76	32.82	31.45	32.80
6544	NASDAQ	ATRO	Fri, Jul 6, 2018	31.85	32.04	31.54	31.60
6543	NASDAQ	ATRO	Thu, Jul 5, 2018	32.03	32.03	31.37	31.82
6542	NASDAQ	ATRO	Tue, Jul 3, 2018	31.72	32.04	31.38	31.84
6541	NASDAQ	ATRO	Mon, Jul 2, 2018	31.02	31.67	30.92	31.61
6540	NASDAQ	ATRO	Fri, Jun 29, 2018	31.23	31.69	30.98	31.28
6539	NASDAQ	ATRO	Thu, Jun 28, 2018	31.43	31.52	30.55	31.20
6538	NASDAQ	ATRO	Wed, Jun 27, 2018	32.09	32.50	31.46	31.49
6537	NASDAQ	ATRO	Tue, Jun 26, 2018	31.35	31.98	31.00	31.97
6536	NASDAQ	ATRO	Mon, Jun 25, 2018	31.88	32.42	31.03	31.23
6535	NASDAQ	ATRO	Fri, Jun 22, 2018	32.50	32.50	31.77	32.05
6534	NASDAQ	ATRO	Thu, Jun 21, 2018	32.99	32.99	32.08	32.21
6533	NASDAQ	ATRO	Wed, Jun 20, 2018	33.41	33.63	32.90	33.03
6532	NASDAQ	ATRO	Tue, Jun 19, 2018	33.83	34.11	32.97	33.30
6531	NASDAQ	ATRO	Mon, Jun 18, 2018	33.66	34.18	33.09	34.11
6530	NASDAQ	ATRO	Fri, Jun 15, 2018	33.36	33.98	33.10	33.94
6529	NASDAQ	ATRO	Thu, Jun 14, 2018	33.42	33.51	32.65	33.36
6528	NASDAQ	ATRO	Wed, Jun 13, 2018	33.13	33.30	32.70	33.21
6527	NASDAQ	ATRO	Tue, Jun 12, 2018	32.82	33.50	31.81	33.03
6526	NASDAQ	ATRO	Mon, Jun 11, 2018	32.63	33.14	32.03	32.78
6525	NASDAQ	ATRO	Fri, Jun 8, 2018	30.92	32.78	30.92	32.62
6524	NASDAQ	ATRO	Thu, Jun 7, 2018	30.89	30.94	30.43	30.92
6523	NASDAQ	ATRO	Wed, Jun 6, 2018	31.26	31.50	30.61	30.77
6522	NASDAQ	ATRO	Tue, Jun 5, 2018	31.83	31.93	31.01	31.10
6521	NASDAQ	ATRO	Mon, Jun 4, 2018	32.03	32.27	31.28	31.89
6520	NASDAQ	ATRO	Fri, Jun 1, 2018	30.83	32.09	30.63	32.02
6519	NASDAQ	ATRO	Thu, May 31, 2018	31.10	31.42	30.51	30.61
6518	NASDAQ	ATRO	Wed, May 30, 2018	30.79	31.24	30.30	31.11
6517	NASDAQ	ATRO	Tue, May 29, 2018	30.44	30.74	30.33	30.57
6516	NASDAQ	ATRO	Fri, May 25, 2018	30.85	30.85	30.32	30.57
6515	NASDAQ	ATRO	Thu, May 24, 2018	30.70	31.28	29.95	30.90
6514	NASDAQ	ATRO	Wed, May 23, 2018	30.19	30.90	30.10	30.81
6513	NASDAQ	ATRO	Tue, May 22, 2018	31.31	31.31	30.26	30.31
6512	NASDAQ	ATRO	Mon, May 21, 2018	31.32	31.81	31.07	31.30
6511	NASDAQ	ATRO	Fri, May 18, 2018	31.22	31.24	30.90	31.18
6510	NASDAQ	ATRO	Thu, May 17, 2018	30.86	31.52	30.61	31.10
6509	NASDAQ	ATRO	Wed, May 16, 2018	30.45	31.10	30.07	30.85
6508	NASDAQ	ATRO	Tue, May 15, 2018	30.56	30.88	29.49	30.45
6507	NASDAQ	ATRO	Mon, May 14, 2018	30.44	30.88	30.17	30.74
6506	NASDAQ	ATRO	Fri, May 11, 2018	29.43	30.36	29.35	30.30
6505	NASDAQ	ATRO	Thu, May 10, 2018	29.84	30.10	28.85	29.40
6504	NASDAQ	ATRO	Wed, May 9, 2018	29.52	32.62	29.52	30.35
6503	NASDAQ	ATRO	Tue, May 8, 2018	31.81	32.88	31.55	32.65
6502	NASDAQ	ATRO	Mon, May 7, 2018	31.17	31.95	30.90	31.74
6501	NASDAQ	ATRO	Fri, May 4, 2018	30.68	31.40	30.55	31.07
6500	NASDAQ	ATRO	Thu, May 3, 2018	31.00	31.48	30.57	30.88
6499	NASDAQ	ATRO	Wed, May 2, 2018	31.21	31.63	30.79	31.08
6498	NASDAQ	ATRO	Tue, May 1, 2018	31.74	32.07	30.74	31.21
6497	NASDAQ	ATRO	Mon, Apr 30, 2018	32.91	33.28	31.79	31.81
6496	NASDAQ	ATRO	Fri, Apr 27, 2018	33.61	33.79	32.65	32.77
6495	NASDAQ	ATRO	Thu, Apr 26, 2018	33.17	33.73	32.92	33.53
6494	NASDAQ	ATRO	Wed, Apr 25, 2018	33.13	33.36	32.59	33.10
6493	NASDAQ	ATRO	Tue, Apr 24, 2018	33.57	33.95	32.57	33.10
6492	NASDAQ	ATRO	Mon, Apr 23, 2018	33.87	34.11	33.30	33.40
6491	NASDAQ	ATRO	Fri, Apr 20, 2018	33.97	33.97	33.47	33.70
6490	NASDAQ	ATRO	Thu, Apr 19, 2018	34.15	34.43	33.77	33.90
6489	NASDAQ	ATRO	Wed, Apr 18, 2018	33.91	34.40	33.78	34.23
6488	NASDAQ	ATRO	Tue, Apr 17, 2018	33.33	33.93	32.86	33.80
6487	NASDAQ	ATRO	Mon, Apr 16, 2018	32.11	33.02	32.00	33.02
6486	NASDAQ	ATRO	Fri, Apr 13, 2018	31.91	31.94	31.32	31.88
6485	NASDAQ	ATRO	Thu, Apr 12, 2018	31.85	32.09	31.70	31.83
6484	NASDAQ	ATRO	Wed, Apr 11, 2018	31.30	31.91	31.30	31.61
6483	NASDAQ	ATRO	Tue, Apr 10, 2018	30.77	31.50	30.05	31.46
6482	NASDAQ	ATRO	Mon, Apr 9, 2018	31.03	31.27	30.29	30.31
6481	NASDAQ	ATRO	Fri, Apr 6, 2018	31.67	31.93	30.45	30.75
6480	NASDAQ	ATRO	Thu, Apr 5, 2018	31.87	32.08	31.44	31.82
6479	NASDAQ	ATRO	Wed, Apr 4, 2018	31.20	31.78	31.10	31.50
6478	NASDAQ	ATRO	Tue, Apr 3, 2018	31.75	32.33	31.52	31.65
6477	NASDAQ	ATRO	Mon, Apr 2, 2018	32.39	32.86	31.25	31.77
6476	NASDAQ	ATRO	Thu, Mar 29, 2018	31.96	32.90	31.93	32.43
6475	NASDAQ	ATRO	Wed, Mar 28, 2018	32.06	32.43	31.48	31.69
6474	NASDAQ	ATRO	Tue, Mar 27, 2018	32.06	32.57	31.41	31.99
6473	NASDAQ	ATRO	Mon, Mar 26, 2018	31.52	32.94	31.09	31.98
6472	NASDAQ	ATRO	Fri, Mar 23, 2018	31.85	32.15	30.90	30.94
6471	NASDAQ	ATRO	Thu, Mar 22, 2018	33.23	33.23	31.68	31.73
6470	NASDAQ	ATRO	Wed, Mar 21, 2018	33.43	33.82	33.04	33.53
6469	NASDAQ	ATRO	Tue, Mar 20, 2018	33.66	33.91	33.37	33.44
6468	NASDAQ	ATRO	Mon, Mar 19, 2018	33.47	33.68	32.88	33.60
6467	NASDAQ	ATRO	Fri, Mar 16, 2018	33.83	34.06	33.22	33.53
6466	NASDAQ	ATRO	Thu, Mar 15, 2018	34.22	34.56	33.75	33.83
6465	NASDAQ	ATRO	Wed, Mar 14, 2018	35.04	35.04	33.83	34.05
6464	NASDAQ	ATRO	Tue, Mar 13, 2018	35.50	35.77	34.67	34.86
6463	NASDAQ	ATRO	Mon, Mar 12, 2018	35.60	35.77	34.94	35.29
6462	NASDAQ	ATRO	Fri, Mar 9, 2018	35.22	35.77	34.61	35.63
6461	NASDAQ	ATRO	Thu, Mar 8, 2018	35.41	35.41	34.40	34.88
6460	NASDAQ	ATRO	Wed, Mar 7, 2018	34.64	35.37	33.81	35.22
6459	NASDAQ	ATRO	Tue, Mar 6, 2018	35.06	35.30	34.35	35.15
6458	NASDAQ	ATRO	Mon, Mar 5, 2018	34.65	35.01	32.42	34.68
6457	NASDAQ	ATRO	Fri, Mar 2, 2018	33.50	34.92	33.43	34.79
6456	NASDAQ	ATRO	Thu, Mar 1, 2018	33.51	34.30	32.57	34.04
6455	NASDAQ	ATRO	Wed, Feb 28, 2018	33.77	34.25	32.98	33.52
6454	NASDAQ	ATRO	Tue, Feb 27, 2018	33.13	36.48	32.85	33.52
6453	NASDAQ	ATRO	Mon, Feb 26, 2018	35.65	37.09	35.48	36.95
6452	NASDAQ	ATRO	Fri, Feb 23, 2018	36.08	36.44	35.25	35.42
6451	NASDAQ	ATRO	Thu, Feb 22, 2018	36.68	36.75	35.74	35.77
6450	NASDAQ	ATRO	Wed, Feb 21, 2018	36.05	36.77	35.18	36.43
6449	NASDAQ	ATRO	Tue, Feb 20, 2018	36.30	36.68	35.87	35.94
6448	NASDAQ	ATRO	Fri, Feb 16, 2018	36.37	36.91	36.23	36.42
6447	NASDAQ	ATRO	Thu, Feb 15, 2018	36.38	37.27	36.01	36.55
6446	NASDAQ	ATRO	Wed, Feb 14, 2018	34.74	36.16	34.74	36.03
6445	NASDAQ	ATRO	Tue, Feb 13, 2018	34.57	35.45	34.46	35.15
6444	NASDAQ	ATRO	Mon, Feb 12, 2018	34.22	34.73	33.63	34.54
6443	NASDAQ	ATRO	Fri, Feb 9, 2018	34.34	34.61	33.19	33.99
6442	NASDAQ	ATRO	Thu, Feb 8, 2018	35.40	35.45	33.82	33.83
6441	NASDAQ	ATRO	Wed, Feb 7, 2018	35.09	35.66	34.90	35.22
6440	NASDAQ	ATRO	Tue, Feb 6, 2018	34.10	35.69	33.87	35.14
6439	NASDAQ	ATRO	Mon, Feb 5, 2018	36.85	37.26	34.53	34.65
6438	NASDAQ	ATRO	Fri, Feb 2, 2018	38.50	38.50	37.20	37.27
6437	NASDAQ	ATRO	Thu, Feb 1, 2018	38.66	39.33	37.83	38.74
6436	NASDAQ	ATRO	Wed, Jan 31, 2018	39.94	40.74	38.63	38.78
6435	NASDAQ	ATRO	Tue, Jan 30, 2018	39.97	40.06	39.28	39.54
6434	NASDAQ	ATRO	Mon, Jan 29, 2018	41.08	41.35	40.01	40.36
6433	NASDAQ	ATRO	Fri, Jan 26, 2018	41.26	41.28	40.50	41.18
6432	NASDAQ	ATRO	Thu, Jan 25, 2018	40.03	41.23	39.89	41.12
6431	NASDAQ	ATRO	Wed, Jan 24, 2018	40.34	40.34	39.46	39.73
6430	NASDAQ	ATRO	Tue, Jan 23, 2018	40.34	40.71	39.43	40.22
6429	NASDAQ	ATRO	Mon, Jan 22, 2018	40.10	40.50	39.43	40.31
6428	NASDAQ	ATRO	Fri, Jan 19, 2018	38.40	40.24	38.18	40.19
6427	NASDAQ	ATRO	Thu, Jan 18, 2018	39.51	39.92	38.23	38.36
6426	NASDAQ	ATRO	Wed, Jan 17, 2018	39.98	39.98	39.38	39.51
6425	NASDAQ	ATRO	Tue, Jan 16, 2018	41.63	43.00	39.78	39.82
6424	NASDAQ	ATRO	Fri, Jan 12, 2018	37.59	42.17	37.39	41.17
6423	NASDAQ	ATRO	Thu, Jan 11, 2018	35.04	35.64	35.03	35.63
6422	NASDAQ	ATRO	Wed, Jan 10, 2018	34.90	35.17	34.44	34.97
6421	NASDAQ	ATRO	Tue, Jan 9, 2018	35.63	35.98	34.95	34.98
6420	NASDAQ	ATRO	Mon, Jan 8, 2018	35.68	36.00	35.30	35.60
6419	NASDAQ	ATRO	Fri, Jan 5, 2018	35.43	36.05	35.37	35.71
6418	NASDAQ	ATRO	Thu, Jan 4, 2018	35.35	35.95	35.05	35.35
6417	NASDAQ	ATRO	Wed, Jan 3, 2018	36.77	36.86	34.90	35.15
6416	NASDAQ	ATRO	Tue, Jan 2, 2018	36.29	36.76	36.18	36.76
6415	NASDAQ	ATRO	Fri, Dec 29, 2017	36.51	36.67	36.05	36.06
6414	NASDAQ	ATRO	Thu, Dec 28, 2017	36.84	36.88	36.33	36.51
6413	NASDAQ	ATRO	Wed, Dec 27, 2017	37.05	37.29	36.50	36.79
6412	NASDAQ	ATRO	Tue, Dec 26, 2017	37.16	37.57	36.98	37.03
6411	NASDAQ	ATRO	Fri, Dec 22, 2017	37.45	37.45	36.84	37.19
6410	NASDAQ	ATRO	Thu, Dec 21, 2017	37.13	37.48	36.64	37.31
6409	NASDAQ	ATRO	Wed, Dec 20, 2017	36.36	37.37	36.35	37.05
6408	NASDAQ	ATRO	Tue, Dec 19, 2017	36.67	37.34	36.13	36.36
6407	NASDAQ	ATRO	Mon, Dec 18, 2017	38.26	38.26	36.31	36.67
6406	NASDAQ	ATRO	Fri, Dec 15, 2017	35.10	35.99	35.02	35.91
6405	NASDAQ	ATRO	Thu, Dec 14, 2017	35.81	35.90	34.90	34.98
6404	NASDAQ	ATRO	Wed, Dec 13, 2017	35.55	36.35	35.55	35.79
6403	NASDAQ	ATRO	Tue, Dec 12, 2017	37.21	37.32	35.53	35.61
6402	NASDAQ	ATRO	Mon, Dec 11, 2017	37.39	37.39	36.40	36.57
6401	NASDAQ	ATRO	Fri, Dec 8, 2017	38.43	38.43	37.56	37.61
6400	NASDAQ	ATRO	Thu, Dec 7, 2017	37.08	38.21	34.63	38.15
6399	NASDAQ	ATRO	Wed, Dec 6, 2017	36.57	37.51	36.34	37.03
6398	NASDAQ	ATRO	Tue, Dec 5, 2017	36.61	36.92	36.30	36.57
6397	NASDAQ	ATRO	Mon, Dec 4, 2017	36.14	37.13	36.12	36.57
6396	NASDAQ	ATRO	Fri, Dec 1, 2017	36.05	36.05	34.74	35.65
6395	NASDAQ	ATRO	Thu, Nov 30, 2017	36.22	36.40	35.78	36.08
6394	NASDAQ	ATRO	Wed, Nov 29, 2017	35.53	36.23	35.53	36.09
6393	NASDAQ	ATRO	Tue, Nov 28, 2017	34.54	35.58	34.30	35.52
6392	NASDAQ	ATRO	Mon, Nov 27, 2017	34.45	34.56	34.07	34.49
6391	NASDAQ	ATRO	Fri, Nov 24, 2017	34.40	34.50	34.13	34.46
6390	NASDAQ	ATRO	Wed, Nov 22, 2017	34.42	34.56	33.77	34.19
6389	NASDAQ	ATRO	Tue, Nov 21, 2017	33.83	34.77	33.50	34.42
6388	NASDAQ	ATRO	Mon, Nov 20, 2017	33.49	33.75	33.18	33.67
6387	NASDAQ	ATRO	Fri, Nov 17, 2017	32.97	33.63	32.67	33.43
6386	NASDAQ	ATRO	Thu, Nov 16, 2017	32.47	33.07	32.47	33.00
6385	NASDAQ	ATRO	Wed, Nov 15, 2017	32.43	33.12	32.24	32.40
6384	NASDAQ	ATRO	Tue, Nov 14, 2017	32.48	32.79	30.46	32.55
6383	NASDAQ	ATRO	Mon, Nov 13, 2017	33.06	33.17	30.58	32.64
6382	NASDAQ	ATRO	Fri, Nov 10, 2017	33.34	33.84	33.21	33.23
6381	NASDAQ	ATRO	Thu, Nov 9, 2017	32.55	33.68	32.01	33.66
6380	NASDAQ	ATRO	Wed, Nov 8, 2017	31.76	32.79	31.63	32.66
6379	NASDAQ	ATRO	Tue, Nov 7, 2017	29.62	32.43	29.53	31.49
6378	NASDAQ	ATRO	Mon, Nov 6, 2017	30.46	31.02	30.45	30.96
6377	NASDAQ	ATRO	Fri, Nov 3, 2017	30.56	30.66	30.19	30.47
6376	NASDAQ	ATRO	Thu, Nov 2, 2017	29.72	30.86	29.59	30.64
6375	NASDAQ	ATRO	Wed, Nov 1, 2017	30.20	30.20	29.43	29.77
6374	NASDAQ	ATRO	Tue, Oct 31, 2017	30.09	30.18	29.53	29.91
6373	NASDAQ	ATRO	Mon, Oct 30, 2017	30.87	31.07	30.03	30.14
6372	NASDAQ	ATRO	Fri, Oct 27, 2017	30.35	31.37	30.03	31.14
6371	NASDAQ	ATRO	Thu, Oct 26, 2017	30.02	30.17	29.92	30.11
6370	NASDAQ	ATRO	Wed, Oct 25, 2017	29.65	29.96	29.18	29.96
6369	NASDAQ	ATRO	Tue, Oct 24, 2017	29.50	29.77	29.23	29.66
6368	NASDAQ	ATRO	Mon, Oct 23, 2017	29.57	29.57	29.25	29.35
6367	NASDAQ	ATRO	Fri, Oct 20, 2017	29.00	29.57	28.87	29.55
6366	NASDAQ	ATRO	Thu, Oct 19, 2017	29.02	29.02	28.33	28.83
6365	NASDAQ	ATRO	Wed, Oct 18, 2017	28.43	29.09	28.43	29.08
6364	NASDAQ	ATRO	Tue, Oct 17, 2017	27.30	28.82	27.17	28.43
6363	NASDAQ	ATRO	Mon, Oct 16, 2017	26.90	27.11	26.70	26.97
6362	NASDAQ	ATRO	Fri, Oct 13, 2017	27.09	27.09	26.77	26.83
6361	NASDAQ	ATRO	Thu, Oct 12, 2017	26.74	27.06	26.65	26.97
6360	NASDAQ	ATRO	Wed, Oct 11, 2017	26.87	27.11	26.61	26.77
6359	NASDAQ	ATRO	Tue, Oct 10, 2017	26.90	27.17	26.57	26.88
6358	NASDAQ	ATRO	Mon, Oct 9, 2017	27.35	27.39	26.86	26.90
6357	NASDAQ	ATRO	Fri, Oct 6, 2017	27.45	27.50	27.13	27.17
6356	NASDAQ	ATRO	Thu, Oct 5, 2017	26.88	27.64	26.84	27.58
6355	NASDAQ	ATRO	Wed, Oct 4, 2017	26.37	26.74	26.27	26.71
6354	NASDAQ	ATRO	Tue, Oct 3, 2017	26.27	26.41	26.02	26.38
6353	NASDAQ	ATRO	Mon, Oct 2, 2017	25.86	26.23	25.78	26.22
6352	NASDAQ	ATRO	Fri, Sep 29, 2017	26.03	26.20	25.84	25.87
6351	NASDAQ	ATRO	Thu, Sep 28, 2017	26.04	26.41	25.83	26.02
6350	NASDAQ	ATRO	Wed, Sep 27, 2017	25.23	26.16	25.23	26.07
6349	NASDAQ	ATRO	Tue, Sep 26, 2017	24.82	25.28	24.45	25.23
6348	NASDAQ	ATRO	Mon, Sep 25, 2017	25.32	25.37	24.71	24.79
6347	NASDAQ	ATRO	Fri, Sep 22, 2017	25.27	25.37	25.05	25.30
6346	NASDAQ	ATRO	Thu, Sep 21, 2017	25.19	25.31	25.15	25.23
6345	NASDAQ	ATRO	Wed, Sep 20, 2017	25.13	25.37	24.90	25.20
6344	NASDAQ	ATRO	Tue, Sep 19, 2017	25.22	25.22	24.81	25.03
6343	NASDAQ	ATRO	Mon, Sep 18, 2017	24.85	25.19	24.83	25.14
6342	NASDAQ	ATRO	Fri, Sep 15, 2017	24.84	25.55	24.57	24.83
6341	NASDAQ	ATRO	Thu, Sep 14, 2017	24.57	24.80	24.35	24.78
6340	NASDAQ	ATRO	Wed, Sep 13, 2017	24.60	24.80	24.40	24.57
6339	NASDAQ	ATRO	Tue, Sep 12, 2017	23.95	24.60	23.87	24.59
6338	NASDAQ	ATRO	Mon, Sep 11, 2017	23.26	23.96	23.05	23.93
6337	NASDAQ	ATRO	Fri, Sep 8, 2017	23.30	23.34	22.95	23.05
6336	NASDAQ	ATRO	Thu, Sep 7, 2017	23.41	23.41	22.96	23.34
6335	NASDAQ	ATRO	Wed, Sep 6, 2017	22.86	23.38	22.69	23.37
6334	NASDAQ	ATRO	Tue, Sep 5, 2017	22.76	22.83	22.60	22.80
6333	NASDAQ	ATRO	Fri, Sep 1, 2017	22.86	22.91	22.61	22.76
6332	NASDAQ	ATRO	Thu, Aug 31, 2017	22.95	23.03	22.70	22.86
6331	NASDAQ	ATRO	Wed, Aug 30, 2017	22.73	22.96	22.59	22.90
6330	NASDAQ	ATRO	Tue, Aug 29, 2017	22.61	22.80	22.57	22.71
6329	NASDAQ	ATRO	Mon, Aug 28, 2017	22.74	22.77	22.59	22.69
6328	NASDAQ	ATRO	Fri, Aug 25, 2017	22.66	22.79	22.60	22.74
6327	NASDAQ	ATRO	Thu, Aug 24, 2017	22.70	22.96	22.60	22.67
6326	NASDAQ	ATRO	Wed, Aug 23, 2017	22.66	22.79	22.59	22.61
6325	NASDAQ	ATRO	Tue, Aug 22, 2017	22.77	23.00	22.72	22.80
6324	NASDAQ	ATRO	Mon, Aug 21, 2017	22.74	22.83	22.64	22.75
6323	NASDAQ	ATRO	Fri, Aug 18, 2017	22.61	22.98	22.61	22.77
6322	NASDAQ	ATRO	Thu, Aug 17, 2017	22.61	22.90	22.57	22.73
6321	NASDAQ	ATRO	Wed, Aug 16, 2017	23.03	23.24	22.63	22.70
6320	NASDAQ	ATRO	Tue, Aug 15, 2017	23.04	23.10	22.83	23.00
6319	NASDAQ	ATRO	Mon, Aug 14, 2017	22.79	23.17	22.70	22.98
6318	NASDAQ	ATRO	Fri, Aug 11, 2017	22.20	22.84	22.13	22.75
6317	NASDAQ	ATRO	Thu, Aug 10, 2017	22.23	22.48	21.87	22.16
6316	NASDAQ	ATRO	Wed, Aug 9, 2017	22.40	22.45	22.18	22.36
6315	NASDAQ	ATRO	Tue, Aug 8, 2017	22.49	23.16	22.39	22.40
6314	NASDAQ	ATRO	Mon, Aug 7, 2017	21.85	22.66	21.80	22.57
6313	NASDAQ	ATRO	Fri, Aug 4, 2017	21.95	21.97	21.77	21.85
6312	NASDAQ	ATRO	Thu, Aug 3, 2017	21.78	22.24	21.70	21.97
6311	NASDAQ	ATRO	Wed, Aug 2, 2017	23.74	24.26	20.83	21.89
6310	NASDAQ	ATRO	Tue, Aug 1, 2017	25.43	25.60	24.71	25.03
6309	NASDAQ	ATRO	Mon, Jul 31, 2017	25.85	25.87	25.37	25.43
6308	NASDAQ	ATRO	Fri, Jul 28, 2017	25.70	25.93	25.32	25.83
6307	NASDAQ	ATRO	Thu, Jul 27, 2017	26.01	26.07	25.60	25.70
6306	NASDAQ	ATRO	Wed, Jul 26, 2017	26.11	26.33	25.91	25.95
6305	NASDAQ	ATRO	Tue, Jul 25, 2017	26.04	26.66	26.04	26.07
6304	NASDAQ	ATRO	Mon, Jul 24, 2017	26.50	26.54	25.87	25.96
6303	NASDAQ	ATRO	Fri, Jul 21, 2017	26.77	26.77	26.46	26.57
6302	NASDAQ	ATRO	Thu, Jul 20, 2017	26.63	26.93	26.57	26.64
6301	NASDAQ	ATRO	Wed, Jul 19, 2017	26.68	27.06	26.48	26.57
6300	NASDAQ	ATRO	Tue, Jul 18, 2017	26.97	26.97	26.48	26.68
6299	NASDAQ	ATRO	Mon, Jul 17, 2017	26.93	27.37	26.67	27.00
6298	NASDAQ	ATRO	Fri, Jul 14, 2017	27.00	27.19	26.88	26.95
6297	NASDAQ	ATRO	Thu, Jul 13, 2017	27.33	27.33	26.74	27.05
6296	NASDAQ	ATRO	Wed, Jul 12, 2017	27.29	27.55	27.10	27.34
6295	NASDAQ	ATRO	Tue, Jul 11, 2017	26.55	27.19	26.55	27.17
6294	NASDAQ	ATRO	Mon, Jul 10, 2017	26.59	26.84	26.47	26.54
6293	NASDAQ	ATRO	Fri, Jul 7, 2017	26.50	26.70	26.11	26.66
6292	NASDAQ	ATRO	Thu, Jul 6, 2017	26.44	26.72	26.24	26.44
6291	NASDAQ	ATRO	Wed, Jul 5, 2017	26.70	26.70	26.21	26.62
6290	NASDAQ	ATRO	Mon, Jul 3, 2017	26.65	26.89	26.45	26.70
6289	NASDAQ	ATRO	Fri, Jun 30, 2017	26.61	26.78	26.44	26.50
6288	NASDAQ	ATRO	Thu, Jun 29, 2017	26.31	26.55	26.06	26.51
6287	NASDAQ	ATRO	Wed, Jun 28, 2017	26.15	26.46	26.03	26.29
6286	NASDAQ	ATRO	Tue, Jun 27, 2017	25.88	26.24	25.88	26.01
6285	NASDAQ	ATRO	Mon, Jun 26, 2017	25.84	26.28	25.84	25.91
6284	NASDAQ	ATRO	Fri, Jun 23, 2017	25.98	26.30	25.67	25.85
6283	NASDAQ	ATRO	Thu, Jun 22, 2017	25.93	26.36	25.83	25.98
6282	NASDAQ	ATRO	Wed, Jun 21, 2017	26.52	26.52	25.92	25.93
6281	NASDAQ	ATRO	Tue, Jun 20, 2017	26.58	26.59	26.32	26.34
6280	NASDAQ	ATRO	Mon, Jun 19, 2017	26.59	26.87	26.47	26.57
6279	NASDAQ	ATRO	Fri, Jun 16, 2017	26.55	26.65	26.26	26.49
6278	NASDAQ	ATRO	Thu, Jun 15, 2017	26.61	26.85	26.53	26.76
6277	NASDAQ	ATRO	Wed, Jun 14, 2017	27.10	27.35	26.58	26.77
6276	NASDAQ	ATRO	Tue, Jun 13, 2017	26.86	27.26	26.65	27.07
6275	NASDAQ	ATRO	Mon, Jun 12, 2017	26.89	27.21	26.53	26.82
6274	NASDAQ	ATRO	Fri, Jun 9, 2017	26.78	26.95	26.55	26.77
6273	NASDAQ	ATRO	Thu, Jun 8, 2017	26.57	27.24	26.48	26.75
6272	NASDAQ	ATRO	Wed, Jun 7, 2017	26.58	26.77	26.15	26.54
6271	NASDAQ	ATRO	Tue, Jun 6, 2017	26.43	26.70	26.25	26.54
6270	NASDAQ	ATRO	Mon, Jun 5, 2017	26.97	27.18	26.57	26.61
6269	NASDAQ	ATRO	Fri, Jun 2, 2017	26.88	27.50	26.88	26.93
6268	NASDAQ	ATRO	Thu, Jun 1, 2017	26.66	26.87	26.45	26.86
6267	NASDAQ	ATRO	Wed, May 31, 2017	26.75	26.87	26.57	26.61
6266	NASDAQ	ATRO	Tue, May 30, 2017	26.78	26.97	26.66	26.70
6265	NASDAQ	ATRO	Fri, May 26, 2017	26.82	27.04	26.58	26.85
6264	NASDAQ	ATRO	Thu, May 25, 2017	26.13	26.90	26.01	26.84
6263	NASDAQ	ATRO	Wed, May 24, 2017	26.13	26.30	25.89	26.08
6262	NASDAQ	ATRO	Tue, May 23, 2017	26.37	26.37	25.89	26.09
6261	NASDAQ	ATRO	Mon, May 22, 2017	26.04	26.41	25.97	26.29
6260	NASDAQ	ATRO	Fri, May 19, 2017	26.14	26.39	26.03	26.04
6259	NASDAQ	ATRO	Thu, May 18, 2017	26.37	26.38	25.83	26.03
6258	NASDAQ	ATRO	Wed, May 17, 2017	26.65	26.68	26.17	26.45
6257	NASDAQ	ATRO	Tue, May 16, 2017	26.69	26.84	26.45	26.78
6256	NASDAQ	ATRO	Mon, May 15, 2017	26.55	27.00	26.50	26.68
6255	NASDAQ	ATRO	Fri, May 12, 2017	26.35	26.53	26.09	26.42
6254	NASDAQ	ATRO	Thu, May 11, 2017	26.76	26.97	26.39	26.44
6253	NASDAQ	ATRO	Wed, May 10, 2017	26.94	27.03	26.73	26.90
6252	NASDAQ	ATRO	Tue, May 9, 2017	26.95	27.20	26.82	26.97
6251	NASDAQ	ATRO	Mon, May 8, 2017	26.74	27.03	26.74	26.90
6250	NASDAQ	ATRO	Fri, May 5, 2017	28.82	28.91	26.38	26.80
6249	NASDAQ	ATRO	Thu, May 4, 2017	29.57	29.82	27.82	28.95
6248	NASDAQ	ATRO	Wed, May 3, 2017	27.51	27.63	27.01	27.34
6247	NASDAQ	ATRO	Tue, May 2, 2017	27.81	27.89	27.45	27.67
6246	NASDAQ	ATRO	Mon, May 1, 2017	28.35	28.48	27.54	27.70
6245	NASDAQ	ATRO	Fri, Apr 28, 2017	28.48	28.55	28.09	28.27
6244	NASDAQ	ATRO	Thu, Apr 27, 2017	28.09	28.26	27.83	28.11
6243	NASDAQ	ATRO	Wed, Apr 26, 2017	28.05	28.17	27.84	27.97
6242	NASDAQ	ATRO	Tue, Apr 25, 2017	27.89	28.30	27.67	28.04
6241	NASDAQ	ATRO	Mon, Apr 24, 2017	27.68	28.00	27.54	27.74
6240	NASDAQ	ATRO	Fri, Apr 21, 2017	27.46	27.77	27.16	27.16
6239	NASDAQ	ATRO	Thu, Apr 20, 2017	27.14	27.46	26.82	27.45
6238	NASDAQ	ATRO	Wed, Apr 19, 2017	26.97	27.48	26.90	27.04
6237	NASDAQ	ATRO	Tue, Apr 18, 2017	26.52	26.97	26.42	26.90
6236	NASDAQ	ATRO	Mon, Apr 17, 2017	26.53	26.82	26.17	26.58
6235	NASDAQ	ATRO	Thu, Apr 13, 2017	27.17	27.27	26.44	26.52
6234	NASDAQ	ATRO	Wed, Apr 12, 2017	27.82	27.82	27.04	27.26
6233	NASDAQ	ATRO	Tue, Apr 11, 2017	27.42	27.83	27.20	27.83
6232	NASDAQ	ATRO	Mon, Apr 10, 2017	27.44	27.92	27.31	27.46
6231	NASDAQ	ATRO	Fri, Apr 7, 2017	27.13	27.51	27.06	27.46
6230	NASDAQ	ATRO	Thu, Apr 6, 2017	26.99	27.44	26.53	27.26
6229	NASDAQ	ATRO	Wed, Apr 5, 2017	27.34	27.90	26.90	27.03
6228	NASDAQ	ATRO	Tue, Apr 4, 2017	26.86	27.19	26.69	27.12
6227	NASDAQ	ATRO	Mon, Apr 3, 2017	27.75	27.82	26.52	26.82
6226	NASDAQ	ATRO	Fri, Mar 31, 2017	27.53	27.75	27.10	27.59
6225	NASDAQ	ATRO	Thu, Mar 30, 2017	27.63	27.81	27.17	27.50
6224	NASDAQ	ATRO	Wed, Mar 29, 2017	26.81	27.72	26.47	27.70
6223	NASDAQ	ATRO	Tue, Mar 28, 2017	25.58	26.88	25.32	26.77
6222	NASDAQ	ATRO	Mon, Mar 27, 2017	25.37	25.66	25.16	25.58
6221	NASDAQ	ATRO	Fri, Mar 24, 2017	25.97	26.09	25.22	25.39
6220	NASDAQ	ATRO	Thu, Mar 23, 2017	25.04	26.11	25.04	25.65
6219	NASDAQ	ATRO	Wed, Mar 22, 2017	25.74	25.96	24.99	25.03
6218	NASDAQ	ATRO	Tue, Mar 21, 2017	26.40	26.45	25.66	25.82
6217	NASDAQ	ATRO	Mon, Mar 20, 2017	26.30	26.42	26.03	26.18
6216	NASDAQ	ATRO	Fri, Mar 17, 2017	26.23	26.44	26.08	26.21
6215	NASDAQ	ATRO	Thu, Mar 16, 2017	26.49	26.70	26.21	26.30
6214	NASDAQ	ATRO	Wed, Mar 15, 2017	26.50	26.75	26.26	26.38
6213	NASDAQ	ATRO	Tue, Mar 14, 2017	26.70	27.15	26.26	26.44
6212	NASDAQ	ATRO	Mon, Mar 13, 2017	26.97	27.26	26.71	26.84
6211	NASDAQ	ATRO	Fri, Mar 10, 2017	27.54	27.63	26.97	27.04
6210	NASDAQ	ATRO	Thu, Mar 9, 2017	27.85	28.17	27.22	27.27
6209	NASDAQ	ATRO	Wed, Mar 8, 2017	28.55	28.80	27.80	27.86
6208	NASDAQ	ATRO	Tue, Mar 7, 2017	28.71	29.03	28.39	28.50
6207	NASDAQ	ATRO	Mon, Mar 6, 2017	29.13	30.02	28.75	28.83
6206	NASDAQ	ATRO	Fri, Mar 3, 2017	29.85	29.90	29.13	29.18
6205	NASDAQ	ATRO	Thu, Mar 2, 2017	30.20	30.80	29.55	29.83
6204	NASDAQ	ATRO	Wed, Mar 1, 2017	29.59	30.37	29.30	30.23
6203	NASDAQ	ATRO	Tue, Feb 28, 2017	30.04	30.14	29.09	29.14
6202	NASDAQ	ATRO	Mon, Feb 27, 2017	28.79	30.09	28.71	29.99
6201	NASDAQ	ATRO	Fri, Feb 24, 2017	29.09	29.19	28.72	28.83
6200	NASDAQ	ATRO	Thu, Feb 23, 2017	29.35	29.39	29.11	29.26
6199	NASDAQ	ATRO	Wed, Feb 22, 2017	29.57	29.83	29.01	29.23
6198	NASDAQ	ATRO	Tue, Feb 21, 2017	29.57	29.90	28.98	29.62
6197	NASDAQ	ATRO	Fri, Feb 17, 2017	29.91	31.39	29.33	29.56
6196	NASDAQ	ATRO	Thu, Feb 16, 2017	29.26	29.37	28.71	29.28
6195	NASDAQ	ATRO	Wed, Feb 15, 2017	29.69	29.83	29.15	29.24
6194	NASDAQ	ATRO	Tue, Feb 14, 2017	29.79	29.95	29.50	29.74
6193	NASDAQ	ATRO	Mon, Feb 13, 2017	29.35	29.97	29.17	29.80
6192	NASDAQ	ATRO	Fri, Feb 10, 2017	28.77	29.33	28.77	29.29
6191	NASDAQ	ATRO	Thu, Feb 9, 2017	28.63	28.90	28.57	28.68
6190	NASDAQ	ATRO	Wed, Feb 8, 2017	28.70	28.83	28.38	28.58
6189	NASDAQ	ATRO	Tue, Feb 7, 2017	28.89	28.94	28.39	28.70
6188	NASDAQ	ATRO	Mon, Feb 6, 2017	28.70	28.91	28.68	28.77
6187	NASDAQ	ATRO	Fri, Feb 3, 2017	28.30	28.77	28.22	28.73
6186	NASDAQ	ATRO	Thu, Feb 2, 2017	28.37	28.45	27.96	28.09
6185	NASDAQ	ATRO	Wed, Feb 1, 2017	28.84	29.10	28.07	28.37
6184	NASDAQ	ATRO	Tue, Jan 31, 2017	28.39	28.65	27.98	28.53
6183	NASDAQ	ATRO	Mon, Jan 30, 2017	28.71	28.71	28.01	28.40
6182	NASDAQ	ATRO	Fri, Jan 27, 2017	28.73	28.96	28.62	28.85
6181	NASDAQ	ATRO	Thu, Jan 26, 2017	28.70	28.83	28.21	28.54
6180	NASDAQ	ATRO	Wed, Jan 25, 2017	28.14	28.70	28.10	28.65
6179	NASDAQ	ATRO	Tue, Jan 24, 2017	27.93	28.53	27.74	28.39
6178	NASDAQ	ATRO	Mon, Jan 23, 2017	27.30	28.02	27.23	27.86
6177	NASDAQ	ATRO	Fri, Jan 20, 2017	27.97	28.19	27.13	27.30
6176	NASDAQ	ATRO	Thu, Jan 19, 2017	28.56	28.83	27.30	27.94
6175	NASDAQ	ATRO	Wed, Jan 18, 2017	29.04	29.13	28.60	28.79
6174	NASDAQ	ATRO	Tue, Jan 17, 2017	29.79	29.79	28.86	28.98
6173	NASDAQ	ATRO	Fri, Jan 13, 2017	29.28	30.09	29.28	29.90
6172	NASDAQ	ATRO	Thu, Jan 12, 2017	29.60	29.60	28.43	29.08
6171	NASDAQ	ATRO	Wed, Jan 11, 2017	29.38	29.51	29.03	29.50
6170	NASDAQ	ATRO	Tue, Jan 10, 2017	29.21	30.17	29.07	29.38
6169	NASDAQ	ATRO	Mon, Jan 9, 2017	29.56	29.57	28.97	29.21
6168	NASDAQ	ATRO	Fri, Jan 6, 2017	29.83	30.03	29.27	29.71
6167	NASDAQ	ATRO	Thu, Jan 5, 2017	30.20	30.50	28.99	29.75
6166	NASDAQ	ATRO	Wed, Jan 4, 2017	29.63	30.28	29.63	30.12
6165	NASDAQ	ATRO	Tue, Jan 3, 2017	30.01	30.40	29.29	29.57
6164	NASDAQ	ATRO	Fri, Dec 30, 2016	30.00	30.00	29.30	29.43
6163	NASDAQ	ATRO	Thu, Dec 29, 2016	30.17	30.27	29.54	29.90
6162	NASDAQ	ATRO	Wed, Dec 28, 2016	30.63	30.72	29.89	30.04
6161	NASDAQ	ATRO	Tue, Dec 27, 2016	30.10	30.73	30.10	30.60
6160	NASDAQ	ATRO	Fri, Dec 23, 2016	29.91	30.05	29.43	30.02
6159	NASDAQ	ATRO	Thu, Dec 22, 2016	29.99	30.63	29.60	29.82
6158	NASDAQ	ATRO	Wed, Dec 21, 2016	30.83	32.32	29.77	29.87
6157	NASDAQ	ATRO	Tue, Dec 20, 2016	32.99	33.60	30.29	30.83
6156	NASDAQ	ATRO	Mon, Dec 19, 2016	31.97	32.77	31.92	32.75
6155	NASDAQ	ATRO	Fri, Dec 16, 2016	32.19	33.44	31.74	32.19
6154	NASDAQ	ATRO	Thu, Dec 15, 2016	31.69	32.63	31.33	32.23
6153	NASDAQ	ATRO	Wed, Dec 14, 2016	32.52	32.75	31.69	31.76
6152	NASDAQ	ATRO	Tue, Dec 13, 2016	34.00	34.06	32.24	32.38
6151	NASDAQ	ATRO	Mon, Dec 12, 2016	35.20	35.20	33.58	33.68
6150	NASDAQ	ATRO	Fri, Dec 9, 2016	34.63	35.68	34.51	35.39
6149	NASDAQ	ATRO	Thu, Dec 8, 2016	34.07	34.63	33.56	34.31
6148	NASDAQ	ATRO	Wed, Dec 7, 2016	33.17	34.11	32.89	33.86
6147	NASDAQ	ATRO	Tue, Dec 6, 2016	32.59	33.20	32.50	33.01
6146	NASDAQ	ATRO	Mon, Dec 5, 2016	32.57	33.01	32.34	32.56
6145	NASDAQ	ATRO	Fri, Dec 2, 2016	32.15	32.23	31.75	32.08
6144	NASDAQ	ATRO	Thu, Dec 1, 2016	32.28	32.86	31.86	32.08
6143	NASDAQ	ATRO	Wed, Nov 30, 2016	33.04	33.13	32.03	32.10
6142	NASDAQ	ATRO	Tue, Nov 29, 2016	33.34	33.67	32.62	32.67
6141	NASDAQ	ATRO	Mon, Nov 28, 2016	33.26	33.79	33.02	33.42
6140	NASDAQ	ATRO	Fri, Nov 25, 2016	33.64	33.64	32.88	33.36
6139	NASDAQ	ATRO	Wed, Nov 23, 2016	32.66	33.85	32.37	33.57
6138	NASDAQ	ATRO	Tue, Nov 22, 2016	31.79	32.97	31.65	32.88
6137	NASDAQ	ATRO	Mon, Nov 21, 2016	32.57	32.57	31.03	31.92
6136	NASDAQ	ATRO	Fri, Nov 18, 2016	30.54	30.83	30.30	30.71
6135	NASDAQ	ATRO	Thu, Nov 17, 2016	30.58	30.81	29.99	30.49
6134	NASDAQ	ATRO	Wed, Nov 16, 2016	30.46	30.65	30.01	30.43
6133	NASDAQ	ATRO	Tue, Nov 15, 2016	30.48	30.52	29.60	30.39
6132	NASDAQ	ATRO	Mon, Nov 14, 2016	30.48	31.35	30.08	30.26
6131	NASDAQ	ATRO	Fri, Nov 11, 2016	28.57	30.40	28.57	30.36
6130	NASDAQ	ATRO	Thu, Nov 10, 2016	28.95	29.23	28.39	28.56
6129	NASDAQ	ATRO	Wed, Nov 9, 2016	26.65	29.84	26.64	28.82
6128	NASDAQ	ATRO	Tue, Nov 8, 2016	29.57	29.57	24.63	26.75
6127	NASDAQ	ATRO	Mon, Nov 7, 2016	32.47	32.86	31.83	32.72
6126	NASDAQ	ATRO	Fri, Nov 4, 2016	30.88	32.23	30.88	31.71
6125	NASDAQ	ATRO	Thu, Nov 3, 2016	31.10	31.37	30.70	30.77
6124	NASDAQ	ATRO	Wed, Nov 2, 2016	31.68	32.12	30.84	30.97
6123	NASDAQ	ATRO	Tue, Nov 1, 2016	32.20	32.50	31.55	31.61
6122	NASDAQ	ATRO	Mon, Oct 31, 2016	32.32	32.37	31.27	32.19
6121	NASDAQ	ATRO	Fri, Oct 28, 2016	31.42	32.26	31.42	32.15
6120	NASDAQ	ATRO	Thu, Oct 27, 2016	31.69	32.25	31.14	31.46
6119	NASDAQ	ATRO	Wed, Oct 26, 2016	31.43	31.96	31.43	31.70
6118	NASDAQ	ATRO	Tue, Oct 25, 2016	31.49	31.87	31.14	31.52
6117	NASDAQ	ATRO	Mon, Oct 24, 2016	31.48	32.32	31.40	31.55
6116	NASDAQ	ATRO	Fri, Oct 21, 2016	30.96	31.27	30.81	31.09
6115	NASDAQ	ATRO	Thu, Oct 20, 2016	31.83	32.25	31.10	31.17
6114	NASDAQ	ATRO	Wed, Oct 19, 2016	31.83	32.38	31.64	31.97
6113	NASDAQ	ATRO	Tue, Oct 18, 2016	32.00	32.17	31.61	31.75
6112	NASDAQ	ATRO	Mon, Oct 17, 2016	31.03	31.77	30.92	31.63
6111	NASDAQ	ATRO	Fri, Oct 14, 2016	31.24	31.51	30.97	31.09
6110	NASDAQ	ATRO	Thu, Oct 13, 2016	30.62	31.60	29.78	30.97
6109	NASDAQ	ATRO	Wed, Oct 12, 2016	30.91	30.99	30.57	30.91
6108	NASDAQ	ATRO	Tue, Oct 11, 2016	31.57	31.81	30.73	30.93
6107	NASDAQ	ATRO	Mon, Oct 10, 2016	31.86	32.45	31.38	31.61
6106	NASDAQ	ATRO	Fri, Oct 7, 2016	33.10	33.53	31.77	31.84
6105	NASDAQ	ATRO	Thu, Oct 6, 2016	35.22	35.51	33.06	33.25
6104	NASDAQ	ATRO	Wed, Oct 5, 2016	34.73	35.28	33.97	35.22
6103	NASDAQ	ATRO	Tue, Oct 4, 2016	33.90	35.12	33.80	34.58
6102	NASDAQ	ATRO	Mon, Oct 3, 2016	33.87	33.93	33.30	33.87
6101	NASDAQ	ATRO	Fri, Sep 30, 2016	33.66	34.28	33.24	34.06
6100	NASDAQ	ATRO	Thu, Sep 29, 2016	33.59	33.80	33.28	33.44
6099	NASDAQ	ATRO	Wed, Sep 28, 2016	33.53	33.68	33.41	33.63
6098	NASDAQ	ATRO	Tue, Sep 27, 2016	32.98	33.69	32.89	33.44
6097	NASDAQ	ATRO	Mon, Sep 26, 2016	33.01	33.35	32.84	32.89
6096	NASDAQ	ATRO	Fri, Sep 23, 2016	33.11	33.41	32.90	33.14
6095	NASDAQ	ATRO	Thu, Sep 22, 2016	32.79	33.29	32.79	33.24
6094	NASDAQ	ATRO	Wed, Sep 21, 2016	32.08	32.54	31.77	32.51
6093	NASDAQ	ATRO	Tue, Sep 20, 2016	32.11	32.73	31.76	31.98
6092	NASDAQ	ATRO	Mon, Sep 19, 2016	32.18	32.39	31.77	31.95
6091	NASDAQ	ATRO	Fri, Sep 16, 2016	32.02	32.44	30.92	32.13
6090	NASDAQ	ATRO	Thu, Sep 15, 2016	31.40	32.08	31.07	32.02
6089	NASDAQ	ATRO	Wed, Sep 14, 2016	31.69	32.30	31.33	31.43
6088	NASDAQ	ATRO	Tue, Sep 13, 2016	32.02	32.33	31.35	31.52
6087	NASDAQ	ATRO	Mon, Sep 12, 2016	32.42	32.83	31.54	32.44
6086	NASDAQ	ATRO	Fri, Sep 9, 2016	33.62	33.62	32.51	32.52
6085	NASDAQ	ATRO	Thu, Sep 8, 2016	33.84	34.08	33.35	33.88
6084	NASDAQ	ATRO	Wed, Sep 7, 2016	33.46	34.12	33.41	33.88
6083	NASDAQ	ATRO	Tue, Sep 6, 2016	34.03	34.21	33.40	33.41
6082	NASDAQ	ATRO	Fri, Sep 2, 2016	34.06	34.37	33.89	34.05
6081	NASDAQ	ATRO	Thu, Sep 1, 2016	33.92	34.28	33.54	34.01
6080	NASDAQ	ATRO	Wed, Aug 31, 2016	33.75	34.25	33.42	33.88
6079	NASDAQ	ATRO	Tue, Aug 30, 2016	33.53	34.25	33.53	33.74
6078	NASDAQ	ATRO	Mon, Aug 29, 2016	33.25	33.72	33.25	33.62
6077	NASDAQ	ATRO	Fri, Aug 26, 2016	33.14	33.55	32.91	33.26
6076	NASDAQ	ATRO	Thu, Aug 25, 2016	32.81	33.16	32.73	33.13
6075	NASDAQ	ATRO	Wed, Aug 24, 2016	33.25	33.61	32.97	33.13
6074	NASDAQ	ATRO	Tue, Aug 23, 2016	33.15	33.61	33.02	33.30
6073	NASDAQ	ATRO	Mon, Aug 22, 2016	33.00	33.42	31.82	32.96
6072	NASDAQ	ATRO	Fri, Aug 19, 2016	32.72	33.42	30.19	33.07
6071	NASDAQ	ATRO	Thu, Aug 18, 2016	32.39	33.13	32.39	32.80
6070	NASDAQ	ATRO	Wed, Aug 17, 2016	32.50	32.69	32.12	32.39
6069	NASDAQ	ATRO	Tue, Aug 16, 2016	32.68	33.09	32.44	32.54
6068	NASDAQ	ATRO	Mon, Aug 15, 2016	32.04	33.00	31.98	32.73
6067	NASDAQ	ATRO	Fri, Aug 12, 2016	31.75	32.05	31.42	32.01
6066	NASDAQ	ATRO	Thu, Aug 11, 2016	31.27	31.79	30.83	31.67
6065	NASDAQ	ATRO	Wed, Aug 10, 2016	31.25	31.53	30.49	31.09
6064	NASDAQ	ATRO	Tue, Aug 9, 2016	31.76	31.80	31.02	31.32
6063	NASDAQ	ATRO	Mon, Aug 8, 2016	31.48	31.78	31.09	31.75
6062	NASDAQ	ATRO	Fri, Aug 5, 2016	30.32	31.81	30.09	31.35
6061	NASDAQ	ATRO	Thu, Aug 4, 2016	30.09	30.79	29.68	30.33
6060	NASDAQ	ATRO	Wed, Aug 3, 2016	28.57	30.37	28.02	30.36
6059	NASDAQ	ATRO	Tue, Aug 2, 2016	29.51	29.84	28.23	28.86
6058	NASDAQ	ATRO	Mon, Aug 1, 2016	28.85	29.72	28.47	29.53
6057	NASDAQ	ATRO	Fri, Jul 29, 2016	28.39	29.03	27.98	28.94
6056	NASDAQ	ATRO	Thu, Jul 28, 2016	28.80	28.80	27.96	28.36
6055	NASDAQ	ATRO	Wed, Jul 27, 2016	27.54	28.87	27.27	28.76
6054	NASDAQ	ATRO	Tue, Jul 26, 2016	26.98	27.52	26.77	27.49
6053	NASDAQ	ATRO	Mon, Jul 25, 2016	27.48	27.48	26.77	27.00
6052	NASDAQ	ATRO	Fri, Jul 22, 2016	27.28	27.57	26.73	27.54
6051	NASDAQ	ATRO	Thu, Jul 21, 2016	27.07	27.76	25.95	27.32
6050	NASDAQ	ATRO	Wed, Jul 20, 2016	26.76	27.29	26.63	27.15
6049	NASDAQ	ATRO	Tue, Jul 19, 2016	26.69	27.10	26.59	26.71
6048	NASDAQ	ATRO	Mon, Jul 18, 2016	26.65	27.02	26.51	26.69
6047	NASDAQ	ATRO	Fri, Jul 15, 2016	26.69	26.98	26.43	26.78
6046	NASDAQ	ATRO	Thu, Jul 14, 2016	26.56	26.84	26.28	26.44
6045	NASDAQ	ATRO	Wed, Jul 13, 2016	26.90	26.97	26.03	26.30
6044	NASDAQ	ATRO	Tue, Jul 12, 2016	26.50	27.13	25.87	26.81
6043	NASDAQ	ATRO	Mon, Jul 11, 2016	26.51	26.62	26.13	26.22
6042	NASDAQ	ATRO	Fri, Jul 8, 2016	25.21	26.36	25.21	26.26
6041	NASDAQ	ATRO	Thu, Jul 7, 2016	24.60	25.08	24.56	24.91
6040	NASDAQ	ATRO	Wed, Jul 6, 2016	24.14	24.73	23.92	24.49
6039	NASDAQ	ATRO	Tue, Jul 5, 2016	25.21	25.26	24.31	24.39
6038	NASDAQ	ATRO	Fri, Jul 1, 2016	25.17	25.65	24.66	25.21
6037	NASDAQ	ATRO	Thu, Jun 30, 2016	24.71	25.22	24.48	25.15
6036	NASDAQ	ATRO	Wed, Jun 29, 2016	24.54	25.55	24.39	24.72
6035	NASDAQ	ATRO	Tue, Jun 28, 2016	24.37	24.67	24.02	24.05
6034	NASDAQ	ATRO	Mon, Jun 27, 2016	24.67	24.98	23.72	24.07
6033	NASDAQ	ATRO	Fri, Jun 24, 2016	24.94	25.94	24.83	25.10
6032	NASDAQ	ATRO	Thu, Jun 23, 2016	26.30	26.59	26.02	26.43
6031	NASDAQ	ATRO	Wed, Jun 22, 2016	26.49	26.63	25.84	25.88
6030	NASDAQ	ATRO	Tue, Jun 21, 2016	26.86	26.86	26.23	26.48
6029	NASDAQ	ATRO	Mon, Jun 20, 2016	27.38	27.48	26.73	26.81
6028	NASDAQ	ATRO	Fri, Jun 17, 2016	26.91	27.28	26.49	26.88
6027	NASDAQ	ATRO	Thu, Jun 16, 2016	26.87	27.02	26.23	26.82
6026	NASDAQ	ATRO	Wed, Jun 15, 2016	27.15	27.47	26.74	26.99
6025	NASDAQ	ATRO	Tue, Jun 14, 2016	27.43	27.61	26.70	26.95
6024	NASDAQ	ATRO	Mon, Jun 13, 2016	28.36	28.51	27.37	27.49
6023	NASDAQ	ATRO	Fri, Jun 10, 2016	28.81	28.91	28.23	28.51
6022	NASDAQ	ATRO	Thu, Jun 9, 2016	29.48	29.53	29.07	29.29
6021	NASDAQ	ATRO	Wed, Jun 8, 2016	29.72	29.78	29.42	29.60
6020	NASDAQ	ATRO	Tue, Jun 7, 2016	29.73	30.00	29.53	29.61
6019	NASDAQ	ATRO	Mon, Jun 6, 2016	29.18	29.97	28.91	29.75
6018	NASDAQ	ATRO	Fri, Jun 3, 2016	29.48	29.86	28.85	29.20
6017	NASDAQ	ATRO	Thu, Jun 2, 2016	29.29	29.63	29.12	29.60
6016	NASDAQ	ATRO	Wed, Jun 1, 2016	29.01	29.41	28.60	29.35
6015	NASDAQ	ATRO	Tue, May 31, 2016	28.87	29.44	28.71	29.11
6014	NASDAQ	ATRO	Fri, May 27, 2016	28.73	28.99	28.47	28.89
6013	NASDAQ	ATRO	Thu, May 26, 2016	28.91	29.07	28.58	28.73
6012	NASDAQ	ATRO	Wed, May 25, 2016	28.79	29.11	28.54	28.91
6011	NASDAQ	ATRO	Tue, May 24, 2016	27.53	28.86	27.29	28.66
6010	NASDAQ	ATRO	Mon, May 23, 2016	27.25	27.30	26.60	27.14
6009	NASDAQ	ATRO	Fri, May 20, 2016	26.29	27.30	25.89	27.23
6008	NASDAQ	ATRO	Thu, May 19, 2016	26.54	26.79	25.94	26.25
6007	NASDAQ	ATRO	Wed, May 18, 2016	25.82	27.00	25.73	26.67
6006	NASDAQ	ATRO	Tue, May 17, 2016	26.74	27.02	25.71	25.88
6005	NASDAQ	ATRO	Mon, May 16, 2016	26.53	27.30	26.49	26.76
6004	NASDAQ	ATRO	Fri, May 13, 2016	26.67	26.98	26.47	26.56
6003	NASDAQ	ATRO	Thu, May 12, 2016	26.46	26.86	26.37	26.73
6002	NASDAQ	ATRO	Wed, May 11, 2016	26.86	26.93	26.31	26.34
6001	NASDAQ	ATRO	Tue, May 10, 2016	26.19	26.88	26.09	26.82
6000	NASDAQ	ATRO	Mon, May 9, 2016	26.57	26.65	25.53	26.12
5999	NASDAQ	ATRO	Fri, May 6, 2016	25.49	26.93	25.22	26.68
5998	NASDAQ	ATRO	Thu, May 5, 2016	24.95	27.06	24.60	25.49
5997	NASDAQ	ATRO	Wed, May 4, 2016	26.47	26.70	23.07	24.91
5996	NASDAQ	ATRO	Tue, May 3, 2016	28.02	28.49	27.34	27.50
5995	NASDAQ	ATRO	Mon, May 2, 2016	28.02	28.42	27.60	28.40
5994	NASDAQ	ATRO	Fri, Apr 29, 2016	28.41	29.49	27.91	27.94
5993	NASDAQ	ATRO	Thu, Apr 28, 2016	27.73	29.13	27.73	28.56
5992	NASDAQ	ATRO	Wed, Apr 27, 2016	27.86	28.12	27.65	28.02
5991	NASDAQ	ATRO	Tue, Apr 26, 2016	27.18	28.07	27.09	27.96
5990	NASDAQ	ATRO	Mon, Apr 25, 2016	27.86	28.05	27.02	27.15
5989	NASDAQ	ATRO	Fri, Apr 22, 2016	27.48	28.11	27.48	28.03
5988	NASDAQ	ATRO	Thu, Apr 21, 2016	27.84	28.28	27.44	27.54
5987	NASDAQ	ATRO	Wed, Apr 20, 2016	28.94	28.94	27.23	27.76
5986	NASDAQ	ATRO	Tue, Apr 19, 2016	29.48	29.69	29.13	29.28
5985	NASDAQ	ATRO	Mon, Apr 18, 2016	28.95	29.53	28.86	29.33
5984	NASDAQ	ATRO	Fri, Apr 15, 2016	29.42	30.28	28.88	29.15
5983	NASDAQ	ATRO	Thu, Apr 14, 2016	29.76	29.84	29.32	29.53
5982	NASDAQ	ATRO	Wed, Apr 13, 2016	28.70	29.81	28.70	29.67
5981	NASDAQ	ATRO	Tue, Apr 12, 2016	28.30	28.90	28.19	28.57
5980	NASDAQ	ATRO	Mon, Apr 11, 2016	28.42	28.73	27.81	28.23
5979	NASDAQ	ATRO	Fri, Apr 8, 2016	28.75	29.47	28.17	28.22
5978	NASDAQ	ATRO	Thu, Apr 7, 2016	28.59	29.39	28.39	28.45
5977	NASDAQ	ATRO	Wed, Apr 6, 2016	28.31	29.05	27.97	28.82
5976	NASDAQ	ATRO	Tue, Apr 5, 2016	28.58	28.58	28.58	28.26
5975	NASDAQ	ATRO	Mon, Apr 4, 2016	28.86	29.19	28.45	28.58
5974	NASDAQ	ATRO	Fri, Apr 1, 2016	28.51	28.97	27.83	28.85
5973	NASDAQ	ATRO	Thu, Mar 31, 2016	28.69	29.24	28.32	28.77
5972	NASDAQ	ATRO	Wed, Mar 30, 2016	28.61	28.95	28.15	28.77
5971	NASDAQ	ATRO	Tue, Mar 29, 2016	26.88	28.14	26.47	28.27
5970	NASDAQ	ATRO	Mon, Mar 28, 2016	27.76	27.76	26.93	26.98
5969	NASDAQ	ATRO	Thu, Mar 24, 2016	27.55	27.55	27.55	27.58
5968	NASDAQ	ATRO	Wed, Mar 23, 2016	28.20	28.64	27.49	27.55
5967	NASDAQ	ATRO	Tue, Mar 22, 2016	28.73	28.73	27.88	28.36
5966	NASDAQ	ATRO	Mon, Mar 21, 2016	28.93	29.24	28.55	28.67
5965	NASDAQ	ATRO	Fri, Mar 18, 2016	28.96	29.49	28.53	28.97
5964	NASDAQ	ATRO	Thu, Mar 17, 2016	27.71	28.99	27.36	28.73
5963	NASDAQ	ATRO	Wed, Mar 16, 2016	26.65	27.95	26.09	27.73
5962	NASDAQ	ATRO	Tue, Mar 15, 2016	27.35	27.35	27.35	26.72
5961	NASDAQ	ATRO	Mon, Mar 14, 2016	28.13	28.25	26.96	27.35
5960	NASDAQ	ATRO	Fri, Mar 11, 2016	26.69	28.35	26.63	28.33
5959	NASDAQ	ATRO	Thu, Mar 10, 2016	27.02	27.02	26.39	26.85
5958	NASDAQ	ATRO	Wed, Mar 9, 2016	27.50	27.50	27.50	26.85
5957	NASDAQ	ATRO	Tue, Mar 8, 2016	27.94	28.11	26.47	27.52
5956	NASDAQ	ATRO	Mon, Mar 7, 2016	27.24	28.39	26.85	28.26
5955	NASDAQ	ATRO	Fri, Mar 4, 2016	26.91	26.91	26.91	27.44
5954	NASDAQ	ATRO	Thu, Mar 3, 2016	25.86	25.86	25.86	26.91
5953	NASDAQ	ATRO	Wed, Mar 2, 2016	25.12	26.02	24.42	24.76
5952	NASDAQ	ATRO	Tue, Mar 1, 2016	24.05	24.05	24.05	24.76
5951	NASDAQ	ATRO	Mon, Feb 29, 2016	23.48	24.84	23.40	24.05
5950	NASDAQ	ATRO	Fri, Feb 26, 2016	22.31	23.21	21.86	22.93
5949	NASDAQ	ATRO	Thu, Feb 25, 2016	21.85	23.11	21.69	22.15
5948	NASDAQ	ATRO	Wed, Feb 24, 2016	21.14	21.64	20.64	21.47
5947	NASDAQ	ATRO	Tue, Feb 23, 2016	20.93	21.56	20.67	21.39
5946	NASDAQ	ATRO	Mon, Feb 22, 2016	20.93	21.40	20.73	21.05
5945	NASDAQ	ATRO	Fri, Feb 19, 2016	20.22	21.86	19.86	20.79
5944	NASDAQ	ATRO	Thu, Feb 18, 2016	19.71	20.63	19.43	20.44
5943	NASDAQ	ATRO	Wed, Feb 17, 2016	22.19	22.74	18.71	18.92
5942	NASDAQ	ATRO	Tue, Feb 16, 2016	22.04	22.79	21.51	22.69
5941	NASDAQ	ATRO	Fri, Feb 12, 2016	21.81	22.53	21.50	21.87
5940	NASDAQ	ATRO	Thu, Feb 11, 2016	21.85	21.85	20.56	21.53
5939	NASDAQ	ATRO	Wed, Feb 10, 2016	22.11	22.58	21.80	22.31
5938	NASDAQ	ATRO	Tue, Feb 9, 2016	22.03	22.31	21.74	21.99
5937	NASDAQ	ATRO	Mon, Feb 8, 2016	22.01	22.49	21.20	22.42
5936	NASDAQ	ATRO	Fri, Feb 5, 2016	23.01	23.98	22.19	22.22
5935	NASDAQ	ATRO	Thu, Feb 4, 2016	22.15	23.24	22.14	23.13
5934	NASDAQ	ATRO	Wed, Feb 3, 2016	22.28	22.28	20.80	22.12
5933	NASDAQ	ATRO	Tue, Feb 2, 2016	23.25	23.25	21.13	21.78
5932	NASDAQ	ATRO	Mon, Feb 1, 2016	24.29	24.39	23.28	23.47
5931	NASDAQ	ATRO	Fri, Jan 29, 2016	24.15	24.64	23.97	24.38
5930	NASDAQ	ATRO	Thu, Jan 28, 2016	24.92	25.13	23.96	24.15
5929	NASDAQ	ATRO	Wed, Jan 27, 2016	25.26	25.55	24.42	24.70
5928	NASDAQ	ATRO	Tue, Jan 26, 2016	25.90	25.94	25.40	25.55
5927	NASDAQ	ATRO	Mon, Jan 25, 2016	25.76	26.41	25.62	25.69
5926	NASDAQ	ATRO	Fri, Jan 22, 2016	25.84	26.43	25.24	25.92
5925	NASDAQ	ATRO	Thu, Jan 21, 2016	25.09	26.07	24.91	25.39
5924	NASDAQ	ATRO	Wed, Jan 20, 2016	23.89	25.41	23.09	25.09
5923	NASDAQ	ATRO	Tue, Jan 19, 2016	25.88	25.88	23.97	24.37
5922	NASDAQ	ATRO	Fri, Jan 15, 2016	26.38	26.38	24.76	25.54
5921	NASDAQ	ATRO	Thu, Jan 14, 2016	26.46	27.64	25.93	27.22
5920	NASDAQ	ATRO	Wed, Jan 13, 2016	26.90	27.73	25.84	26.19
5919	NASDAQ	ATRO	Tue, Jan 12, 2016	27.17	27.48	25.92	26.81
5918	NASDAQ	ATRO	Mon, Jan 11, 2016	27.72	27.80	26.72	26.87
5917	NASDAQ	ATRO	Fri, Jan 8, 2016	28.17	28.44	27.19	27.49
5916	NASDAQ	ATRO	Thu, Jan 7, 2016	28.98	29.24	28.13	28.15
5915	NASDAQ	ATRO	Wed, Jan 6, 2016	29.60	29.82	29.16	29.66
5914	NASDAQ	ATRO	Tue, Jan 5, 2016	29.34	30.30	29.23	30.04
5913	NASDAQ	ATRO	Mon, Jan 4, 2016	30.19	30.28	29.10	29.33
5912	NASDAQ	ATRO	Thu, Dec 31, 2015	30.71	31.50	30.40	30.78
5911	NASDAQ	ATRO	Wed, Dec 30, 2015	30.48	31.02	30.34	30.88
5910	NASDAQ	ATRO	Tue, Dec 29, 2015	29.55	30.62	29.43	30.56
5909	NASDAQ	ATRO	Mon, Dec 28, 2015	30.34	30.34	28.95	29.33
5908	NASDAQ	ATRO	Thu, Dec 24, 2015	30.78	30.96	29.70	30.42
5907	NASDAQ	ATRO	Wed, Dec 23, 2015	31.41	31.49	30.61	30.68
5906	NASDAQ	ATRO	Tue, Dec 22, 2015	30.44	31.28	29.95	31.27
5905	NASDAQ	ATRO	Mon, Dec 21, 2015	30.25	30.46	29.84	30.37
5904	NASDAQ	ATRO	Fri, Dec 18, 2015	29.88	30.37	29.07	30.00
5903	NASDAQ	ATRO	Thu, Dec 17, 2015	29.81	30.81	29.77	30.11
5902	NASDAQ	ATRO	Wed, Dec 16, 2015	30.01	30.06	28.72	29.64
5901	NASDAQ	ATRO	Tue, Dec 15, 2015	28.37	30.03	28.14	29.82
5900	NASDAQ	ATRO	Mon, Dec 14, 2015	27.14	28.36	26.79	28.21
5899	NASDAQ	ATRO	Fri, Dec 11, 2015	26.55	27.20	26.40	27.16
5898	NASDAQ	ATRO	Thu, Dec 10, 2015	26.65	27.42	26.47	27.10
5897	NASDAQ	ATRO	Wed, Dec 9, 2015	27.10	27.65	26.22	26.71
5896	NASDAQ	ATRO	Tue, Dec 8, 2015	26.94	27.54	26.68	27.25
5895	NASDAQ	ATRO	Mon, Dec 7, 2015	28.03	28.06	26.78	27.11
5894	NASDAQ	ATRO	Fri, Dec 4, 2015	27.71	28.16	27.60	28.08
5893	NASDAQ	ATRO	Thu, Dec 3, 2015	28.80	29.01	27.70	27.72
5892	NASDAQ	ATRO	Wed, Dec 2, 2015	29.13	29.47	28.57	28.67
5891	NASDAQ	ATRO	Tue, Dec 1, 2015	29.19	29.59	28.99	29.19
5890	NASDAQ	ATRO	Mon, Nov 30, 2015	28.60	29.38	28.52	29.26
5889	NASDAQ	ATRO	Fri, Nov 27, 2015	28.95	29.10	28.49	28.56
5888	NASDAQ	ATRO	Wed, Nov 25, 2015	28.28	29.08	28.05	28.84
5887	NASDAQ	ATRO	Tue, Nov 24, 2015	27.41	28.60	26.68	28.35
5886	NASDAQ	ATRO	Mon, Nov 23, 2015	27.41	27.89	26.74	27.64
5885	NASDAQ	ATRO	Fri, Nov 20, 2015	27.22	27.68	26.71	27.55
5884	NASDAQ	ATRO	Thu, Nov 19, 2015	27.03	27.46	26.56	27.08
5883	NASDAQ	ATRO	Wed, Nov 18, 2015	26.70	27.01	26.47	26.90
5882	NASDAQ	ATRO	Tue, Nov 17, 2015	27.50	27.73	26.59	26.71
5881	NASDAQ	ATRO	Mon, Nov 16, 2015	27.47	27.64	26.98	27.42
5880	NASDAQ	ATRO	Fri, Nov 13, 2015	27.46	29.87	27.33	27.61
5879	NASDAQ	ATRO	Thu, Nov 12, 2015	28.56	28.72	27.20	27.64
5878	NASDAQ	ATRO	Wed, Nov 11, 2015	32.09	32.33	28.68	28.93
5877	NASDAQ	ATRO	Tue, Nov 10, 2015	36.29	36.29	31.92	32.12
5876	NASDAQ	ATRO	Mon, Nov 9, 2015	31.87	31.89	30.02	30.77
5875	NASDAQ	ATRO	Fri, Nov 6, 2015	30.89	32.14	30.47	31.95
5874	NASDAQ	ATRO	Thu, Nov 5, 2015	30.44	31.11	29.80	31.05
5873	NASDAQ	ATRO	Wed, Nov 4, 2015	30.09	30.37	29.49	30.36
5872	NASDAQ	ATRO	Tue, Nov 3, 2015	29.54	30.29	29.34	29.97
5871	NASDAQ	ATRO	Mon, Nov 2, 2015	28.60	29.87	28.57	29.69
5870	NASDAQ	ATRO	Fri, Oct 30, 2015	28.76	28.76	27.37	28.59
5869	NASDAQ	ATRO	Thu, Oct 29, 2015	28.91	28.95	28.47	28.81
5868	NASDAQ	ATRO	Wed, Oct 28, 2015	27.95	29.13	27.81	29.08
5867	NASDAQ	ATRO	Tue, Oct 27, 2015	28.09	28.42	27.35	27.82
5866	NASDAQ	ATRO	Mon, Oct 26, 2015	29.68	29.85	28.02	28.12
5865	NASDAQ	ATRO	Fri, Oct 23, 2015	28.94	29.86	28.60	29.60
5864	NASDAQ	ATRO	Thu, Oct 22, 2015	27.60	29.07	27.40	28.70
5863	NASDAQ	ATRO	Wed, Oct 21, 2015	27.98	28.17	27.37	27.47
5862	NASDAQ	ATRO	Tue, Oct 20, 2015	27.76	27.90	27.16	27.75
5861	NASDAQ	ATRO	Mon, Oct 19, 2015	27.60	27.92	27.15	27.67
5860	NASDAQ	ATRO	Fri, Oct 16, 2015	28.78	28.78	27.66	27.73
5859	NASDAQ	ATRO	Thu, Oct 15, 2015	28.91	28.98	28.36	28.66
5858	NASDAQ	ATRO	Wed, Oct 14, 2015	29.07	29.46	28.51	28.61
5857	NASDAQ	ATRO	Tue, Oct 13, 2015	29.84	30.14	29.15	29.20
5856	NASDAQ	ATRO	Mon, Oct 12, 2015	30.43	31.25	30.01	30.12
5855	NASDAQ	ATRO	Fri, Oct 9, 2015	29.99	30.70	29.94	30.29
5854	NASDAQ	ATRO	Thu, Oct 8, 2015	29.19	30.05	28.43	29.88
5853	NASDAQ	ATRO	Wed, Oct 7, 2015	27.96	29.85	27.88	29.43
5852	NASDAQ	ATRO	Tue, Oct 6, 2015	26.92	28.40	26.25	27.85
5851	NASDAQ	ATRO	Mon, Oct 5, 2015	25.90	26.58	25.69	26.16
5850	NASDAQ	ATRO	Fri, Oct 2, 2015	25.45	25.82	25.25	25.50
5849	NASDAQ	ATRO	Thu, Oct 1, 2015	26.57	26.85	25.59	25.63
5848	NASDAQ	ATRO	Wed, Sep 30, 2015	27.10	27.68	26.49	26.57
5847	NASDAQ	ATRO	Tue, Sep 29, 2015	27.39	27.67	26.75	26.84
5846	NASDAQ	ATRO	Mon, Sep 28, 2015	28.10	28.16	27.58	27.61
5845	NASDAQ	ATRO	Fri, Sep 25, 2015	28.62	28.88	27.70	27.93
5844	NASDAQ	ATRO	Thu, Sep 24, 2015	28.59	28.68	27.57	28.23
5843	NASDAQ	ATRO	Wed, Sep 23, 2015	30.39	30.40	28.59	28.89
5842	NASDAQ	ATRO	Tue, Sep 22, 2015	30.97	31.33	30.15	30.27
5841	NASDAQ	ATRO	Mon, Sep 21, 2015	32.19	32.93	31.36	31.49
5840	NASDAQ	ATRO	Fri, Sep 18, 2015	32.67	33.40	31.34	31.99
5839	NASDAQ	ATRO	Thu, Sep 17, 2015	33.10	33.95	32.97	33.25
5838	NASDAQ	ATRO	Wed, Sep 16, 2015	32.96	33.25	32.43	33.19
5837	NASDAQ	ATRO	Tue, Sep 15, 2015	32.47	33.02	32.18	32.92
5836	NASDAQ	ATRO	Mon, Sep 14, 2015	32.98	33.65	32.41	32.46
5835	NASDAQ	ATRO	Fri, Sep 11, 2015	33.03	33.51	32.63	32.95
5834	NASDAQ	ATRO	Thu, Sep 10, 2015	33.07	33.95	32.71	33.31
5833	NASDAQ	ATRO	Wed, Sep 9, 2015	33.59	33.96	32.92	33.16
5832	NASDAQ	ATRO	Tue, Sep 8, 2015	32.61	33.30	32.17	33.19
5831	NASDAQ	ATRO	Fri, Sep 4, 2015	32.63	33.17	32.19	32.41
5830	NASDAQ	ATRO	Thu, Sep 3, 2015	33.45	33.90	33.00	33.09
5829	NASDAQ	ATRO	Wed, Sep 2, 2015	32.71	33.22	32.23	33.22
5828	NASDAQ	ATRO	Tue, Sep 1, 2015	33.34	33.51	32.30	32.38
5827	NASDAQ	ATRO	Mon, Aug 31, 2015	34.72	34.72	33.82	33.95
5826	NASDAQ	ATRO	Fri, Aug 28, 2015	35.00	35.16	34.44	34.73
5825	NASDAQ	ATRO	Thu, Aug 27, 2015	33.78	35.30	33.03	35.23
5824	NASDAQ	ATRO	Wed, Aug 26, 2015	33.85	33.85	32.23	33.13
5823	NASDAQ	ATRO	Tue, Aug 25, 2015	35.08	35.08	33.02	33.04
5822	NASDAQ	ATRO	Mon, Aug 24, 2015	32.96	34.91	32.61	33.60
5821	NASDAQ	ATRO	Fri, Aug 21, 2015	34.75	35.50	34.24	34.68
5820	NASDAQ	ATRO	Thu, Aug 20, 2015	36.28	36.45	35.01	35.45
5819	NASDAQ	ATRO	Wed, Aug 19, 2015	37.31	37.42	36.16	36.66
5818	NASDAQ	ATRO	Tue, Aug 18, 2015	38.65	38.65	37.21	37.71
5817	NASDAQ	ATRO	Mon, Aug 17, 2015	39.44	39.51	37.59	38.60
5816	NASDAQ	ATRO	Fri, Aug 14, 2015	38.86	39.90	37.94	39.64
5815	NASDAQ	ATRO	Thu, Aug 13, 2015	36.77	39.16	36.74	38.98
5814	NASDAQ	ATRO	Wed, Aug 12, 2015	36.23	37.81	35.56	36.87
5813	NASDAQ	ATRO	Tue, Aug 11, 2015	36.28	36.97	35.95	36.47
5812	NASDAQ	ATRO	Mon, Aug 10, 2015	34.96	36.76	34.94	36.66
5811	NASDAQ	ATRO	Fri, Aug 7, 2015	34.70	34.88	34.23	34.61
5810	NASDAQ	ATRO	Thu, Aug 6, 2015	34.46	35.68	34.34	34.82
5809	NASDAQ	ATRO	Wed, Aug 5, 2015	39.38	39.38	33.26	34.55
5808	NASDAQ	ATRO	Tue, Aug 4, 2015	40.59	40.62	39.11	39.42
5807	NASDAQ	ATRO	Mon, Aug 3, 2015	40.87	41.20	40.05	40.74
5806	NASDAQ	ATRO	Fri, Jul 31, 2015	40.33	41.40	40.10	40.75
5805	NASDAQ	ATRO	Thu, Jul 30, 2015	40.32	40.60	39.93	40.38
5804	NASDAQ	ATRO	Wed, Jul 29, 2015	40.27	40.80	40.09	40.48
5803	NASDAQ	ATRO	Tue, Jul 28, 2015	41.49	41.49	39.66	40.30
5802	NASDAQ	ATRO	Mon, Jul 27, 2015	42.00	42.00	40.91	41.45
5801	NASDAQ	ATRO	Fri, Jul 24, 2015	43.57	44.17	42.46	42.65
5800	NASDAQ	ATRO	Thu, Jul 23, 2015	44.29	45.16	43.64	43.73
5799	NASDAQ	ATRO	Wed, Jul 22, 2015	44.33	44.64	43.86	44.17
5798	NASDAQ	ATRO	Tue, Jul 21, 2015	45.50	45.79	44.18	44.50
5797	NASDAQ	ATRO	Mon, Jul 20, 2015	46.10	46.34	45.40	45.65
5796	NASDAQ	ATRO	Fri, Jul 17, 2015	45.51	46.13	45.22	45.86
5795	NASDAQ	ATRO	Thu, Jul 16, 2015	46.09	46.72	45.57	45.64
5794	NASDAQ	ATRO	Wed, Jul 15, 2015	46.80	47.10	45.79	45.84
5793	NASDAQ	ATRO	Tue, Jul 14, 2015	45.69	46.86	45.41	46.67
5792	NASDAQ	ATRO	Mon, Jul 13, 2015	45.47	45.97	45.13	45.71
5791	NASDAQ	ATRO	Fri, Jul 10, 2015	45.57	45.63	44.80	45.15
5790	NASDAQ	ATRO	Thu, Jul 9, 2015	45.48	45.65	44.94	45.13
5789	NASDAQ	ATRO	Wed, Jul 8, 2015	45.26	45.98	44.47	44.83
5788	NASDAQ	ATRO	Tue, Jul 7, 2015	45.93	45.94	44.91	45.84
5787	NASDAQ	ATRO	Mon, Jul 6, 2015	45.38	46.35	44.77	45.77
5786	NASDAQ	ATRO	Thu, Jul 2, 2015	46.90	48.18	45.53	45.77
5785	NASDAQ	ATRO	Wed, Jul 1, 2015	47.04	47.42	46.17	46.90
5784	NASDAQ	ATRO	Tue, Jun 30, 2015	45.81	46.69	45.38	46.59
5783	NASDAQ	ATRO	Mon, Jun 29, 2015	46.97	47.26	45.47	45.50
5782	NASDAQ	ATRO	Fri, Jun 26, 2015	47.57	47.57	46.50	47.29
5781	NASDAQ	ATRO	Thu, Jun 25, 2015	47.56	47.88	47.11	47.62
5780	NASDAQ	ATRO	Wed, Jun 24, 2015	47.30	47.61	46.90	47.28
5779	NASDAQ	ATRO	Tue, Jun 23, 2015	47.09	47.76	46.73	47.70
5778	NASDAQ	ATRO	Mon, Jun 22, 2015	47.18	47.81	46.34	47.00
5777	NASDAQ	ATRO	Fri, Jun 19, 2015	47.39	47.81	46.76	46.90
5776	NASDAQ	ATRO	Thu, Jun 18, 2015	46.77	47.69	46.77	47.53
5775	NASDAQ	ATRO	Wed, Jun 17, 2015	46.77	47.05	46.17	46.49
5774	NASDAQ	ATRO	Tue, Jun 16, 2015	45.71	46.73	45.71	46.67
5773	NASDAQ	ATRO	Mon, Jun 15, 2015	46.54	46.93	45.52	45.86
5772	NASDAQ	ATRO	Fri, Jun 12, 2015	46.93	47.13	46.21	46.86
5771	NASDAQ	ATRO	Thu, Jun 11, 2015	47.62	47.68	46.62	46.91
5770	NASDAQ	ATRO	Wed, Jun 10, 2015	46.34	47.72	45.97	47.44
5769	NASDAQ	ATRO	Tue, Jun 9, 2015	46.18	46.65	45.55	46.21
5768	NASDAQ	ATRO	Mon, Jun 8, 2015	45.85	46.82	45.70	46.32
5767	NASDAQ	ATRO	Fri, Jun 5, 2015	44.90	46.47	44.67	46.01
5766	NASDAQ	ATRO	Thu, Jun 4, 2015	46.94	47.37	44.99	45.17
5765	NASDAQ	ATRO	Wed, Jun 3, 2015	46.91	47.72	46.68	47.42
5764	NASDAQ	ATRO	Tue, Jun 2, 2015	45.63	48.03	45.40	46.88
5763	NASDAQ	ATRO	Mon, Jun 1, 2015	46.16	46.76	45.22	45.96
5762	NASDAQ	ATRO	Fri, May 29, 2015	46.67	46.71	45.62	45.94
5761	NASDAQ	ATRO	Thu, May 28, 2015	47.87	47.89	46.34	46.69
5760	NASDAQ	ATRO	Wed, May 27, 2015	47.26	48.30	46.88	48.18
5759	NASDAQ	ATRO	Tue, May 26, 2015	47.54	47.54	45.92	47.10
5758	NASDAQ	ATRO	Fri, May 22, 2015	47.55	48.38	46.77	47.68
5757	NASDAQ	ATRO	Thu, May 21, 2015	46.70	47.88	46.55	47.69
5756	NASDAQ	ATRO	Wed, May 20, 2015	47.36	48.13	46.79	46.90
5755	NASDAQ	ATRO	Tue, May 19, 2015	47.19	48.07	46.51	47.34
5754	NASDAQ	ATRO	Mon, May 18, 2015	46.37	47.32	46.34	46.90
5753	NASDAQ	ATRO	Fri, May 15, 2015	46.94	47.07	46.00	46.40
5752	NASDAQ	ATRO	Thu, May 14, 2015	45.43	47.32	44.92	46.90
5751	NASDAQ	ATRO	Wed, May 13, 2015	46.27	46.31	44.70	45.17
5750	NASDAQ	ATRO	Tue, May 12, 2015	40.28	46.62	40.09	46.44
5749	NASDAQ	ATRO	Mon, May 11, 2015	45.68	47.42	45.36	47.24
5748	NASDAQ	ATRO	Fri, May 8, 2015	46.32	46.32	45.29	45.73
5747	NASDAQ	ATRO	Thu, May 7, 2015	44.94	46.20	44.94	45.66
5746	NASDAQ	ATRO	Wed, May 6, 2015	44.55	45.36	44.55	44.94
5745	NASDAQ	ATRO	Tue, May 5, 2015	45.34	45.68	44.14	44.81
5744	NASDAQ	ATRO	Mon, May 4, 2015	44.82	46.19	44.68	45.68
5743	NASDAQ	ATRO	Fri, May 1, 2015	44.56	44.81	43.71	44.58
5742	NASDAQ	ATRO	Thu, Apr 30, 2015	46.15	46.32	44.06	44.24
5741	NASDAQ	ATRO	Wed, Apr 29, 2015	47.67	48.18	46.42	46.44
5740	NASDAQ	ATRO	Tue, Apr 28, 2015	48.09	49.13	47.36	47.92
5739	NASDAQ	ATRO	Mon, Apr 27, 2015	48.80	49.26	47.36	48.29
5738	NASDAQ	ATRO	Fri, Apr 24, 2015	50.17	50.17	48.34	48.80
5737	NASDAQ	ATRO	Thu, Apr 23, 2015	50.05	50.49	49.66	49.93
5736	NASDAQ	ATRO	Wed, Apr 22, 2015	49.18	50.08	48.81	50.04
5735	NASDAQ	ATRO	Tue, Apr 21, 2015	48.97	49.26	48.42	49.13
5734	NASDAQ	ATRO	Mon, Apr 20, 2015	48.51	49.03	48.13	48.62
5733	NASDAQ	ATRO	Fri, Apr 17, 2015	49.52	49.68	47.84	48.07
5732	NASDAQ	ATRO	Thu, Apr 16, 2015	49.79	50.57	49.46	50.04
5731	NASDAQ	ATRO	Wed, Apr 15, 2015	49.49	50.68	48.77	50.04
5730	NASDAQ	ATRO	Tue, Apr 14, 2015	49.73	50.39	49.03	49.09
5729	NASDAQ	ATRO	Mon, Apr 13, 2015	50.58	50.68	49.67	49.73
5728	NASDAQ	ATRO	Fri, Apr 10, 2015	49.25	50.84	49.01	50.35
5727	NASDAQ	ATRO	Thu, Apr 9, 2015	49.39	49.78	48.76	48.92
5726	NASDAQ	ATRO	Wed, Apr 8, 2015	48.10	49.62	47.99	49.56
5725	NASDAQ	ATRO	Tue, Apr 7, 2015	49.30	49.95	48.08	48.20
5724	NASDAQ	ATRO	Mon, Apr 6, 2015	48.11	49.75	47.91	49.24
5723	NASDAQ	ATRO	Thu, Apr 2, 2015	48.02	48.52	47.44	48.03
5722	NASDAQ	ATRO	Wed, Apr 1, 2015	48.30	48.74	47.17	47.84
5721	NASDAQ	ATRO	Tue, Mar 31, 2015	47.70	49.05	47.70	48.44
5720	NASDAQ	ATRO	Mon, Mar 30, 2015	47.41	48.68	47.13	47.84
5719	NASDAQ	ATRO	Fri, Mar 27, 2015	46.68	47.55	46.13	47.37
5718	NASDAQ	ATRO	Thu, Mar 26, 2015	45.69	46.55	45.08	46.43
5717	NASDAQ	ATRO	Wed, Mar 25, 2015	46.83	47.25	45.59	45.73
5716	NASDAQ	ATRO	Tue, Mar 24, 2015	45.92	46.80	45.78	46.62
5715	NASDAQ	ATRO	Mon, Mar 23, 2015	47.01	47.01	45.03	45.92
5714	NASDAQ	ATRO	Fri, Mar 20, 2015	48.73	49.07	48.07	48.14
5713	NASDAQ	ATRO	Thu, Mar 19, 2015	48.55	48.81	47.82	48.54
5712	NASDAQ	ATRO	Wed, Mar 18, 2015	48.03	49.10	47.80	48.62
5711	NASDAQ	ATRO	Tue, Mar 17, 2015	47.01	49.08	46.97	48.27
5710	NASDAQ	ATRO	Mon, Mar 16, 2015	46.92	48.11	46.73	46.94
5709	NASDAQ	ATRO	Fri, Mar 13, 2015	49.49	49.69	46.19	46.94
5708	NASDAQ	ATRO	Thu, Mar 12, 2015	47.98	49.41	47.53	49.33
5707	NASDAQ	ATRO	Wed, Mar 11, 2015	46.09	47.63	45.75	47.48
5706	NASDAQ	ATRO	Tue, Mar 10, 2015	46.69	47.05	45.75	45.86
5705	NASDAQ	ATRO	Mon, Mar 9, 2015	45.55	47.49	45.40	47.06
5704	NASDAQ	ATRO	Fri, Mar 6, 2015	46.65	46.90	45.22	45.45
5703	NASDAQ	ATRO	Thu, Mar 5, 2015	46.70	47.42	46.30	46.90
5702	NASDAQ	ATRO	Wed, Mar 4, 2015	45.79	47.72	45.58	46.61
5701	NASDAQ	ATRO	Tue, Mar 3, 2015	46.52	46.99	45.42	45.89
5700	NASDAQ	ATRO	Mon, Mar 2, 2015	45.92	47.65	45.42	46.66
5699	NASDAQ	ATRO	Fri, Feb 27, 2015	44.54	46.01	44.48	45.72
5698	NASDAQ	ATRO	Thu, Feb 26, 2015	43.89	44.99	43.89	44.73
5697	NASDAQ	ATRO	Wed, Feb 25, 2015	44.26	44.29	43.50	43.93
5696	NASDAQ	ATRO	Tue, Feb 24, 2015	43.25	44.60	43.20	44.15
5695	NASDAQ	ATRO	Mon, Feb 23, 2015	43.66	43.85	42.44	43.54
5694	NASDAQ	ATRO	Fri, Feb 20, 2015	45.13	46.06	43.66	43.96
5693	NASDAQ	ATRO	Thu, Feb 19, 2015	40.32	46.87	40.26	45.11
5692	NASDAQ	ATRO	Wed, Feb 18, 2015	37.42	38.08	37.23	37.75
5691	NASDAQ	ATRO	Tue, Feb 17, 2015	37.90	37.99	36.96	37.40
5690	NASDAQ	ATRO	Fri, Feb 13, 2015	35.85	37.74	35.71	37.64
5689	NASDAQ	ATRO	Thu, Feb 12, 2015	35.16	35.93	34.83	35.85
5688	NASDAQ	ATRO	Wed, Feb 11, 2015	35.65	35.76	34.24	35.03
5687	NASDAQ	ATRO	Tue, Feb 10, 2015	35.45	35.98	34.72	35.62
5686	NASDAQ	ATRO	Mon, Feb 9, 2015	35.48	35.99	35.07	35.16
5685	NASDAQ	ATRO	Fri, Feb 6, 2015	35.99	36.03	35.53	35.74
5684	NASDAQ	ATRO	Thu, Feb 5, 2015	36.33	36.33	35.68	35.93
5683	NASDAQ	ATRO	Wed, Feb 4, 2015	35.91	36.41	35.79	36.12
5682	NASDAQ	ATRO	Tue, Feb 3, 2015	35.69	36.27	35.37	36.15
5681	NASDAQ	ATRO	Mon, Feb 2, 2015	36.79	36.79	34.90	35.44
5680	NASDAQ	ATRO	Fri, Jan 30, 2015	37.08	37.44	35.84	36.60
5679	NASDAQ	ATRO	Thu, Jan 29, 2015	36.14	37.66	35.88	37.43
5678	NASDAQ	ATRO	Wed, Jan 28, 2015	36.11	36.23	35.32	36.16
5677	NASDAQ	ATRO	Tue, Jan 27, 2015	35.55	36.14	34.80	35.82
5676	NASDAQ	ATRO	Mon, Jan 26, 2015	36.25	36.77	35.62	36.12
5675	NASDAQ	ATRO	Fri, Jan 23, 2015	36.01	36.39	35.59	36.19
5674	NASDAQ	ATRO	Thu, Jan 22, 2015	35.09	36.27	34.64	36.02
5673	NASDAQ	ATRO	Wed, Jan 21, 2015	35.14	36.09	34.41	34.76
5672	NASDAQ	ATRO	Tue, Jan 20, 2015	34.36	35.39	34.18	35.18
5671	NASDAQ	ATRO	Fri, Jan 16, 2015	33.42	34.70	33.22	34.49
5670	NASDAQ	ATRO	Thu, Jan 15, 2015	34.07	34.63	33.24	33.52
5669	NASDAQ	ATRO	Wed, Jan 14, 2015	33.66	34.44	33.53	33.82
5668	NASDAQ	ATRO	Tue, Jan 13, 2015	34.95	35.95	33.65	34.07
5667	NASDAQ	ATRO	Mon, Jan 12, 2015	35.81	35.95	34.28	34.64
5666	NASDAQ	ATRO	Fri, Jan 9, 2015	36.83	36.93	35.66	35.72
5665	NASDAQ	ATRO	Thu, Jan 8, 2015	35.83	37.05	35.83	36.93
5664	NASDAQ	ATRO	Wed, Jan 7, 2015	36.29	36.29	35.19	35.45
5663	NASDAQ	ATRO	Tue, Jan 6, 2015	36.06	36.38	35.26	36.02
5662	NASDAQ	ATRO	Mon, Jan 5, 2015	36.15	36.85	35.76	36.00
5661	NASDAQ	ATRO	Fri, Jan 2, 2015	36.35	36.88	35.55	36.33
5660	NASDAQ	ATRO	Wed, Dec 31, 2014	36.38	37.23	36.18	36.35
5659	NASDAQ	ATRO	Tue, Dec 30, 2014	35.60	36.42	35.33	36.10
5658	NASDAQ	ATRO	Mon, Dec 29, 2014	35.59	35.91	35.12	35.51
5657	NASDAQ	ATRO	Fri, Dec 26, 2014	34.47	35.49	34.40	35.39
5656	NASDAQ	ATRO	Wed, Dec 24, 2014	33.88	34.57	33.59	34.42
5655	NASDAQ	ATRO	Tue, Dec 23, 2014	33.32	34.19	32.37	33.56
5654	NASDAQ	ATRO	Mon, Dec 22, 2014	32.09	33.50	31.65	33.30
5653	NASDAQ	ATRO	Fri, Dec 19, 2014	31.86	32.23	31.33	31.94
5652	NASDAQ	ATRO	Thu, Dec 18, 2014	31.32	32.08	30.85	31.93
5651	NASDAQ	ATRO	Wed, Dec 17, 2014	29.70	30.95	29.15	30.82
5650	NASDAQ	ATRO	Tue, Dec 16, 2014	29.77	30.35	29.45	29.59
5649	NASDAQ	ATRO	Mon, Dec 15, 2014	30.65	30.87	29.72	29.75
5648	NASDAQ	ATRO	Fri, Dec 12, 2014	30.52	31.04	30.29	30.58
5647	NASDAQ	ATRO	Thu, Dec 11, 2014	30.08	31.28	29.77	30.82
5646	NASDAQ	ATRO	Wed, Dec 10, 2014	30.62	31.52	29.89	29.89
5645	NASDAQ	ATRO	Tue, Dec 9, 2014	29.69	30.92	29.49	30.83
5644	NASDAQ	ATRO	Mon, Dec 8, 2014	30.50	30.89	30.06	30.07
5643	NASDAQ	ATRO	Fri, Dec 5, 2014	30.81	31.32	30.31	30.73
5642	NASDAQ	ATRO	Thu, Dec 4, 2014	30.44	31.21	30.41	31.01
5641	NASDAQ	ATRO	Wed, Dec 3, 2014	30.85	30.98	29.58	30.42
5640	NASDAQ	ATRO	Tue, Dec 2, 2014	30.92	31.50	30.64	30.74
5639	NASDAQ	ATRO	Mon, Dec 1, 2014	31.50	31.55	29.71	30.75
5638	NASDAQ	ATRO	Fri, Nov 28, 2014	32.85	33.01	32.12	32.22
5637	NASDAQ	ATRO	Wed, Nov 26, 2014	32.86	33.54	32.67	32.86
5636	NASDAQ	ATRO	Tue, Nov 25, 2014	32.78	32.99	32.28	32.85
5635	NASDAQ	ATRO	Mon, Nov 24, 2014	32.34	32.93	32.22	32.79
5634	NASDAQ	ATRO	Fri, Nov 21, 2014	31.85	32.80	31.76	32.35
5633	NASDAQ	ATRO	Thu, Nov 20, 2014	31.15	31.33	30.71	31.30
5632	NASDAQ	ATRO	Wed, Nov 19, 2014	32.31	32.31	31.12	31.44
5631	NASDAQ	ATRO	Tue, Nov 18, 2014	32.15	32.80	32.15	32.46
5630	NASDAQ	ATRO	Mon, Nov 17, 2014	33.36	33.42	31.94	32.01
5629	NASDAQ	ATRO	Fri, Nov 14, 2014	33.27	33.88	33.14	33.34
5628	NASDAQ	ATRO	Thu, Nov 13, 2014	33.94	34.37	33.84	33.79
5627	NASDAQ	ATRO	Wed, Nov 12, 2014	34.74	34.81	33.86	33.97
5626	NASDAQ	ATRO	Tue, Nov 11, 2014	35.28	35.70	34.80	34.97
5625	NASDAQ	ATRO	Mon, Nov 10, 2014	34.51	35.39	34.22	35.33
5624	NASDAQ	ATRO	Fri, Nov 7, 2014	35.47	35.47	34.27	34.78
5623	NASDAQ	ATRO	Thu, Nov 6, 2014	34.62	35.49	33.95	35.46
5622	NASDAQ	ATRO	Wed, Nov 5, 2014	33.36	35.03	33.33	34.49
5621	NASDAQ	ATRO	Tue, Nov 4, 2014	32.03	35.10	31.89	33.18
5620	NASDAQ	ATRO	Mon, Nov 3, 2014	33.63	33.63	31.61	32.41
5619	NASDAQ	ATRO	Fri, Oct 31, 2014	34.39	34.99	33.53	34.05
5618	NASDAQ	ATRO	Thu, Oct 30, 2014	32.95	34.35	32.26	34.29
5617	NASDAQ	ATRO	Wed, Oct 29, 2014	32.48	33.18	31.81	33.05
5616	NASDAQ	ATRO	Tue, Oct 28, 2014	31.22	32.34	31.22	32.32
5615	NASDAQ	ATRO	Mon, Oct 27, 2014	29.90	30.97	29.77	30.90
5614	NASDAQ	ATRO	Fri, Oct 24, 2014	29.64	30.14	29.48	30.02
5613	NASDAQ	ATRO	Thu, Oct 23, 2014	29.54	29.94	29.22	29.64
5612	NASDAQ	ATRO	Wed, Oct 22, 2014	29.66	29.74	29.06	29.12
5611	NASDAQ	ATRO	Tue, Oct 21, 2014	29.39	29.68	28.73	29.45
5610	NASDAQ	ATRO	Mon, Oct 20, 2014	29.43	29.58	28.55	29.26
5609	NASDAQ	ATRO	Fri, Oct 17, 2014	31.24	31.45	29.54	29.70
5608	NASDAQ	ATRO	Thu, Oct 16, 2014	29.53	31.13	29.23	30.73
5607	NASDAQ	ATRO	Wed, Oct 15, 2014	29.01	30.23	28.59	30.08
5606	NASDAQ	ATRO	Tue, Oct 14, 2014	28.48	29.72	28.33	29.38
5605	NASDAQ	ATRO	Mon, Oct 13, 2014	28.05	28.85	27.69	28.13
5604	NASDAQ	ATRO	Fri, Oct 10, 2014	28.74	29.52	28.03	28.06
5603	NASDAQ	ATRO	Thu, Oct 9, 2014	29.09	29.31	28.07	28.89
5602	NASDAQ	ATRO	Wed, Oct 8, 2014	27.93	29.04	27.15	29.00
5601	NASDAQ	ATRO	Tue, Oct 7, 2014	28.82	28.85	28.01	28.07
5600	NASDAQ	ATRO	Mon, Oct 6, 2014	29.82	30.37	28.93	28.94
5599	NASDAQ	ATRO	Fri, Oct 3, 2014	30.42	30.52	29.67	29.77
5598	NASDAQ	ATRO	Thu, Oct 2, 2014	30.45	30.81	29.34	30.06
5597	NASDAQ	ATRO	Wed, Oct 1, 2014	31.22	31.29	29.18	30.33
5596	NASDAQ	ATRO	Tue, Sep 30, 2014	32.48	32.48	31.17	31.34
5595	NASDAQ	ATRO	Mon, Sep 29, 2014	33.07	33.31	32.21	32.43
5594	NASDAQ	ATRO	Fri, Sep 26, 2014	32.96	33.60	32.18	33.49
5593	NASDAQ	ATRO	Thu, Sep 25, 2014	32.92	32.92	31.68	32.70
5592	NASDAQ	ATRO	Wed, Sep 24, 2014	33.68	33.98	33.03	33.11
5591	NASDAQ	ATRO	Tue, Sep 23, 2014	34.70	34.90	33.25	33.74
5590	NASDAQ	ATRO	Mon, Sep 22, 2014	37.10	37.10	34.85	34.93
5589	NASDAQ	ATRO	Fri, Sep 19, 2014	37.69	37.95	37.12	37.23
5588	NASDAQ	ATRO	Thu, Sep 18, 2014	36.69	37.65	36.19	37.30
5587	NASDAQ	ATRO	Wed, Sep 17, 2014	35.89	36.81	35.49	36.37
5586	NASDAQ	ATRO	Tue, Sep 16, 2014	35.41	35.94	35.16	35.81
5585	NASDAQ	ATRO	Mon, Sep 15, 2014	35.92	36.24	35.39	35.65
5584	NASDAQ	ATRO	Fri, Sep 12, 2014	36.18	36.24	35.70	36.06
5583	NASDAQ	ATRO	Thu, Sep 11, 2014	35.48	36.58	35.48	36.08
5582	NASDAQ	ATRO	Wed, Sep 10, 2014	35.37	36.10	35.16	35.62
5581	NASDAQ	ATRO	Tue, Sep 9, 2014	36.21	36.77	35.27	35.41
5580	NASDAQ	ATRO	Mon, Sep 8, 2014	35.54	36.58	35.10	36.20
5579	NASDAQ	ATRO	Fri, Sep 5, 2014	35.66	36.08	35.20	35.43
5578	NASDAQ	ATRO	Thu, Sep 4, 2014	35.24	35.73	34.79	35.51
5577	NASDAQ	ATRO	Wed, Sep 3, 2014	36.63	36.63	34.89	34.99
5576	NASDAQ	ATRO	Tue, Sep 2, 2014	28.97	30.15	28.86	29.26
5575	NASDAQ	ATRO	Fri, Aug 29, 2014	28.72	28.83	28.29	28.57
5574	NASDAQ	ATRO	Thu, Aug 28, 2014	28.88	29.01	28.53	28.67
5573	NASDAQ	ATRO	Wed, Aug 27, 2014	29.29	29.47	28.85	28.97
5572	NASDAQ	ATRO	Tue, Aug 26, 2014	28.55	29.60	28.42	29.27
5571	NASDAQ	ATRO	Mon, Aug 25, 2014	28.68	28.91	28.24	28.50
5570	NASDAQ	ATRO	Fri, Aug 22, 2014	27.81	28.58	27.65	28.34
5569	NASDAQ	ATRO	Thu, Aug 21, 2014	27.64	27.95	27.15	27.85
5568	NASDAQ	ATRO	Wed, Aug 20, 2014	28.32	28.69	27.36	27.61
5567	NASDAQ	ATRO	Tue, Aug 19, 2014	28.27	28.61	28.12	28.50
5566	NASDAQ	ATRO	Mon, Aug 18, 2014	28.56	28.56	27.91	28.35
5565	NASDAQ	ATRO	Fri, Aug 15, 2014	28.76	28.79	28.01	28.17
5564	NASDAQ	ATRO	Thu, Aug 14, 2014	29.18	29.45	28.37	28.48
5563	NASDAQ	ATRO	Wed, Aug 13, 2014	28.42	29.41	28.23	29.09
5562	NASDAQ	ATRO	Tue, Aug 12, 2014	28.36	28.69	27.78	28.24
5561	NASDAQ	ATRO	Mon, Aug 11, 2014	27.58	29.35	27.35	28.43
5560	NASDAQ	ATRO	Fri, Aug 8, 2014	26.52	27.32	26.22	27.30
5559	NASDAQ	ATRO	Thu, Aug 7, 2014	26.54	27.14	26.20	26.51
5558	NASDAQ	ATRO	Wed, Aug 6, 2014	26.14	27.39	26.05	26.34
5557	NASDAQ	ATRO	Tue, Aug 5, 2014	26.63	26.79	26.24	26.41
5556	NASDAQ	ATRO	Mon, Aug 4, 2014	27.25	27.25	26.38	26.92
5555	NASDAQ	ATRO	Fri, Aug 1, 2014	26.38	27.53	26.15	27.21
5554	NASDAQ	ATRO	Thu, Jul 31, 2014	26.61	26.88	26.02	26.41
5553	NASDAQ	ATRO	Wed, Jul 30, 2014	25.70	27.97	24.99	26.90
5552	NASDAQ	ATRO	Tue, Jul 29, 2014	23.32	23.64	23.24	23.43
5551	NASDAQ	ATRO	Mon, Jul 28, 2014	23.35	23.62	23.23	23.30
5550	NASDAQ	ATRO	Fri, Jul 25, 2014	24.10	24.13	23.28	23.40
5549	NASDAQ	ATRO	Thu, Jul 24, 2014	24.31	24.73	24.04	24.31
5548	NASDAQ	ATRO	Wed, Jul 23, 2014	25.50	25.56	24.68	24.75
5547	NASDAQ	ATRO	Tue, Jul 22, 2014	24.85	25.57	24.85	25.52
5546	NASDAQ	ATRO	Mon, Jul 21, 2014	23.84	24.82	23.84	24.65
5545	NASDAQ	ATRO	Fri, Jul 18, 2014	23.27	24.09	23.23	23.98
5544	NASDAQ	ATRO	Thu, Jul 17, 2014	24.39	24.48	23.25	23.33
5543	NASDAQ	ATRO	Wed, Jul 16, 2014	25.18	25.38	24.49	24.60
5542	NASDAQ	ATRO	Tue, Jul 15, 2014	25.25	25.37	24.70	25.06
5541	NASDAQ	ATRO	Mon, Jul 14, 2014	24.73	25.52	24.56	25.26
5540	NASDAQ	ATRO	Fri, Jul 11, 2014	24.39	24.45	23.94	24.35
5539	NASDAQ	ATRO	Thu, Jul 10, 2014	24.24	24.61	23.89	24.43
5538	NASDAQ	ATRO	Wed, Jul 9, 2014	25.08	25.41	24.60	24.75
5537	NASDAQ	ATRO	Tue, Jul 8, 2014	26.13	26.13	24.91	25.07
5536	NASDAQ	ATRO	Mon, Jul 7, 2014	26.94	26.94	26.13	26.28
5535	NASDAQ	ATRO	Thu, Jul 3, 2014	26.87	27.20	26.58	26.95
5534	NASDAQ	ATRO	Wed, Jul 2, 2014	26.48	26.83	26.38	26.69
5533	NASDAQ	ATRO	Tue, Jul 1, 2014	25.84	26.77	25.54	26.64
5532	NASDAQ	ATRO	Mon, Jun 30, 2014	27.26	27.26	25.38	25.71
5531	NASDAQ	ATRO	Fri, Jun 27, 2014	27.08	27.62	26.98	27.06
5530	NASDAQ	ATRO	Thu, Jun 26, 2014	26.49	27.36	26.23	27.32
5529	NASDAQ	ATRO	Wed, Jun 25, 2014	26.74	26.85	25.89	26.36
5528	NASDAQ	ATRO	Tue, Jun 24, 2014	27.15	27.62	26.86	26.95
5527	NASDAQ	ATRO	Mon, Jun 23, 2014	26.01	27.40	25.69	27.35
5526	NASDAQ	ATRO	Fri, Jun 20, 2014	26.08	26.14	25.71	26.03
5525	NASDAQ	ATRO	Thu, Jun 19, 2014	26.26	26.26	25.77	26.03
5524	NASDAQ	ATRO	Wed, Jun 18, 2014	25.93	26.18	25.43	26.14
5523	NASDAQ	ATRO	Tue, Jun 17, 2014	25.77	26.28	25.67	25.90
5522	NASDAQ	ATRO	Mon, Jun 16, 2014	25.18	26.06	25.09	25.90
5521	NASDAQ	ATRO	Fri, Jun 13, 2014	25.22	25.45	24.79	25.10
5520	NASDAQ	ATRO	Thu, Jun 12, 2014	25.83	25.88	24.61	25.15
5519	NASDAQ	ATRO	Wed, Jun 11, 2014	26.94	26.94	25.50	25.85
5518	NASDAQ	ATRO	Tue, Jun 10, 2014	28.00	28.39	26.72	27.08
5517	NASDAQ	ATRO	Mon, Jun 9, 2014	27.30	28.56	26.70	28.23
5516	NASDAQ	ATRO	Fri, Jun 6, 2014	26.01	27.32	25.62	27.15
5515	NASDAQ	ATRO	Thu, Jun 5, 2014	25.18	26.08	24.91	25.77
5514	NASDAQ	ATRO	Wed, Jun 4, 2014	24.59	25.14	24.27	25.00
5513	NASDAQ	ATRO	Tue, Jun 3, 2014	24.54	24.95	23.74	24.70
5512	NASDAQ	ATRO	Mon, Jun 2, 2014	25.09	25.09	24.13	24.82
5511	NASDAQ	ATRO	Fri, May 30, 2014	25.16	25.16	24.76	24.98
5510	NASDAQ	ATRO	Thu, May 29, 2014	25.16	25.16	24.69	25.08
5509	NASDAQ	ATRO	Wed, May 28, 2014	25.15	25.41	24.37	25.13
5508	NASDAQ	ATRO	Tue, May 27, 2014	25.30	25.53	25.06	25.29
5507	NASDAQ	ATRO	Fri, May 23, 2014	24.14	25.10	24.14	25.03
5506	NASDAQ	ATRO	Thu, May 22, 2014	23.93	24.24	23.52	24.12
5505	NASDAQ	ATRO	Wed, May 21, 2014	23.98	23.98	23.37	23.73
5504	NASDAQ	ATRO	Tue, May 20, 2014	24.07	24.24	23.62	23.95
5503	NASDAQ	ATRO	Mon, May 19, 2014	23.68	24.26	23.68	24.04
5502	NASDAQ	ATRO	Fri, May 16, 2014	24.01	24.09	23.19	23.89
5501	NASDAQ	ATRO	Thu, May 15, 2014	24.63	24.79	23.53	23.98
5500	NASDAQ	ATRO	Wed, May 14, 2014	25.17	25.38	24.69	24.85
5499	NASDAQ	ATRO	Tue, May 13, 2014	25.38	25.55	24.95	25.16
5498	NASDAQ	ATRO	Mon, May 12, 2014	25.06	25.56	24.66	25.45
5497	NASDAQ	ATRO	Fri, May 9, 2014	24.86	25.71	24.58	24.91
5496	NASDAQ	ATRO	Thu, May 8, 2014	26.80	27.15	23.37	25.07
5495	NASDAQ	ATRO	Wed, May 7, 2014	26.80	28.05	25.57	26.96
5494	NASDAQ	ATRO	Tue, May 6, 2014	26.60	27.05	25.39	25.53
5493	NASDAQ	ATRO	Mon, May 5, 2014	25.71	26.85	25.50	26.66
5492	NASDAQ	ATRO	Fri, May 2, 2014	25.79	26.39	25.48	25.87
5491	NASDAQ	ATRO	Thu, May 1, 2014	25.89	26.47	25.47	25.78
5490	NASDAQ	ATRO	Wed, Apr 30, 2014	26.02	26.17	25.23	26.03
5489	NASDAQ	ATRO	Tue, Apr 29, 2014	25.86	26.31	25.64	26.08
5488	NASDAQ	ATRO	Mon, Apr 28, 2014	26.26	26.74	25.14	25.70
5487	NASDAQ	ATRO	Fri, Apr 25, 2014	26.68	27.01	25.98	26.19
5486	NASDAQ	ATRO	Thu, Apr 24, 2014	27.57	27.57	26.19	26.87
5485	NASDAQ	ATRO	Wed, Apr 23, 2014	27.28	28.10	27.10	27.32
5484	NASDAQ	ATRO	Tue, Apr 22, 2014	26.74	27.97	26.43	27.36
5483	NASDAQ	ATRO	Mon, Apr 21, 2014	26.32	27.11	25.73	26.69
5482	NASDAQ	ATRO	Thu, Apr 17, 2014	25.92	26.41	25.30	26.33
5481	NASDAQ	ATRO	Wed, Apr 16, 2014	25.34	26.01	24.80	25.96
5480	NASDAQ	ATRO	Tue, Apr 15, 2014	25.55	25.70	24.35	25.07
5479	NASDAQ	ATRO	Mon, Apr 14, 2014	25.77	25.84	25.27	25.49
5478	NASDAQ	ATRO	Fri, Apr 11, 2014	25.07	25.87	25.07	25.53
5477	NASDAQ	ATRO	Thu, Apr 10, 2014	25.97	25.97	25.09	25.56
5476	NASDAQ	ATRO	Wed, Apr 9, 2014	25.25	26.08	25.19	26.03
5475	NASDAQ	ATRO	Tue, Apr 8, 2014	25.84	26.16	24.30	25.22
5474	NASDAQ	ATRO	Mon, Apr 7, 2014	26.85	26.93	25.83	25.89
5473	NASDAQ	ATRO	Fri, Apr 4, 2014	28.83	28.83	26.87	26.98
5472	NASDAQ	ATRO	Thu, Apr 3, 2014	29.20	29.20	28.21	28.54
5471	NASDAQ	ATRO	Wed, Apr 2, 2014	28.96	29.22	28.62	29.08
5470	NASDAQ	ATRO	Tue, Apr 1, 2014	29.02	29.25	28.39	28.93
5469	NASDAQ	ATRO	Mon, Mar 31, 2014	27.98	29.20	27.91	28.88
5468	NASDAQ	ATRO	Fri, Mar 28, 2014	28.19	29.17	27.53	27.84
5467	NASDAQ	ATRO	Thu, Mar 27, 2014	29.36	29.56	28.01	28.19
5466	NASDAQ	ATRO	Wed, Mar 26, 2014	30.38	30.39	29.42	29.42
5465	NASDAQ	ATRO	Tue, Mar 25, 2014	29.75	30.70	29.72	30.03
5464	NASDAQ	ATRO	Mon, Mar 24, 2014	30.69	30.69	28.71	29.60
5463	NASDAQ	ATRO	Fri, Mar 21, 2014	31.38	31.84	30.51	30.57
5462	NASDAQ	ATRO	Thu, Mar 20, 2014	30.41	32.06	30.01	31.09
5461	NASDAQ	ATRO	Wed, Mar 19, 2014	30.49	30.89	29.47	30.54
5460	NASDAQ	ATRO	Tue, Mar 18, 2014	29.25	30.90	28.83	30.43
5459	NASDAQ	ATRO	Mon, Mar 17, 2014	28.99	29.39	28.65	29.10
5458	NASDAQ	ATRO	Fri, Mar 14, 2014	28.51	28.99	28.51	28.74
5457	NASDAQ	ATRO	Thu, Mar 13, 2014	29.23	29.26	28.31	28.69
5456	NASDAQ	ATRO	Wed, Mar 12, 2014	28.91	29.55	28.53	29.18
5455	NASDAQ	ATRO	Tue, Mar 11, 2014	30.44	30.63	28.92	29.18
5454	NASDAQ	ATRO	Mon, Mar 10, 2014	31.60	31.64	30.22	30.48
5453	NASDAQ	ATRO	Fri, Mar 7, 2014	31.81	31.85	30.82	31.38
5452	NASDAQ	ATRO	Thu, Mar 6, 2014	32.72	33.24	31.29	31.71
5451	NASDAQ	ATRO	Wed, Mar 5, 2014	31.28	32.94	31.04	32.77
5450	NASDAQ	ATRO	Tue, Mar 4, 2014	28.40	31.96	29.93	31.26
5449	NASDAQ	ATRO	Mon, Mar 3, 2014	30.28	30.48	29.51	29.76
5448	NASDAQ	ATRO	Fri, Feb 28, 2014	30.31	31.06	30.19	30.47
5447	NASDAQ	ATRO	Thu, Feb 27, 2014	29.59	30.62	29.41	30.26
5446	NASDAQ	ATRO	Wed, Feb 26, 2014	29.45	30.50	29.33	29.61
5445	NASDAQ	ATRO	Tue, Feb 25, 2014	29.14	29.57	29.04	29.33
5444	NASDAQ	ATRO	Mon, Feb 24, 2014	29.06	29.52	28.92	28.99
5443	NASDAQ	ATRO	Fri, Feb 21, 2014	28.41	29.09	28.27	28.92
5442	NASDAQ	ATRO	Thu, Feb 20, 2014	27.69	28.42	27.61	28.22
5441	NASDAQ	ATRO	Wed, Feb 19, 2014	27.75	27.98	27.23	27.57
5440	NASDAQ	ATRO	Tue, Feb 18, 2014	27.32	28.05	27.09	28.00
5439	NASDAQ	ATRO	Fri, Feb 14, 2014	26.59	27.16	25.78	27.06
5438	NASDAQ	ATRO	Thu, Feb 13, 2014	24.60	26.77	23.02	26.57
5437	NASDAQ	ATRO	Wed, Feb 12, 2014	24.56	25.01	24.28	24.68
5436	NASDAQ	ATRO	Tue, Feb 11, 2014	24.59	24.92	24.22	24.60
5435	NASDAQ	ATRO	Mon, Feb 10, 2014	24.86	24.86	24.00	24.59
5434	NASDAQ	ATRO	Fri, Feb 7, 2014	24.25	25.31	24.13	24.78
5433	NASDAQ	ATRO	Thu, Feb 6, 2014	25.16	26.39	24.12	24.23
5432	NASDAQ	ATRO	Wed, Feb 5, 2014	26.44	26.44	24.88	25.01
5431	NASDAQ	ATRO	Tue, Feb 4, 2014	26.41	26.82	26.18	26.49
5430	NASDAQ	ATRO	Mon, Feb 3, 2014	27.59	27.76	25.53	26.35
5429	NASDAQ	ATRO	Fri, Jan 31, 2014	26.58	27.78	26.46	27.58
5428	NASDAQ	ATRO	Thu, Jan 30, 2014	26.41	27.28	26.33	27.07
5427	NASDAQ	ATRO	Wed, Jan 29, 2014	27.10	27.30	26.10	26.22
5426	NASDAQ	ATRO	Tue, Jan 28, 2014	26.26	27.49	26.08	27.31
5425	NASDAQ	ATRO	Mon, Jan 27, 2014	27.01	27.33	26.05	26.36
5424	NASDAQ	ATRO	Fri, Jan 24, 2014	27.91	27.91	26.26	27.04
5423	NASDAQ	ATRO	Thu, Jan 23, 2014	28.64	28.71	27.93	28.13
5422	NASDAQ	ATRO	Wed, Jan 22, 2014	29.14	29.33	28.69	28.75
5421	NASDAQ	ATRO	Tue, Jan 21, 2014	29.93	30.25	29.01	29.14
5420	NASDAQ	ATRO	Fri, Jan 17, 2014	29.45	30.15	29.26	29.45
5419	NASDAQ	ATRO	Thu, Jan 16, 2014	29.30	29.68	29.17	29.40
5418	NASDAQ	ATRO	Wed, Jan 15, 2014	28.21	29.61	27.99	29.29
5417	NASDAQ	ATRO	Tue, Jan 14, 2014	27.44	28.46	27.32	28.24
5416	NASDAQ	ATRO	Mon, Jan 13, 2014	27.19	27.77	26.98	27.35
5415	NASDAQ	ATRO	Fri, Jan 10, 2014	27.16	27.32	26.74	27.17
5414	NASDAQ	ATRO	Thu, Jan 9, 2014	26.82	27.10	26.36	27.06
5413	NASDAQ	ATRO	Wed, Jan 8, 2014	24.19	27.11	23.89	26.83
5412	NASDAQ	ATRO	Tue, Jan 7, 2014	23.58	24.23	23.43	24.22
5411	NASDAQ	ATRO	Mon, Jan 6, 2014	23.56	23.56	23.17	23.41
5410	NASDAQ	ATRO	Fri, Jan 3, 2014	23.02	23.51	23.00	23.36
5409	NASDAQ	ATRO	Thu, Jan 2, 2014	23.11	23.13	22.88	23.01
5408	NASDAQ	ATRO	Tue, Dec 31, 2013	23.18	23.37	22.97	23.22
5407	NASDAQ	ATRO	Mon, Dec 30, 2013	23.54	23.68	23.14	23.24
5406	NASDAQ	ATRO	Fri, Dec 27, 2013	24.01	24.01	23.48	23.63
5405	NASDAQ	ATRO	Thu, Dec 26, 2013	23.85	24.13	23.76	23.92
5404	NASDAQ	ATRO	Tue, Dec 24, 2013	23.85	23.91	23.66	23.81
5403	NASDAQ	ATRO	Mon, Dec 23, 2013	24.02	24.41	23.87	23.90
5402	NASDAQ	ATRO	Fri, Dec 20, 2013	23.68	24.35	23.65	23.88
5401	NASDAQ	ATRO	Thu, Dec 19, 2013	24.08	24.08	23.57	23.66
5400	NASDAQ	ATRO	Wed, Dec 18, 2013	23.63	24.52	23.32	24.13
5399	NASDAQ	ATRO	Tue, Dec 17, 2013	23.99	23.99	23.23	23.70
5398	NASDAQ	ATRO	Mon, Dec 16, 2013	24.29	24.30	23.85	23.92
5397	NASDAQ	ATRO	Fri, Dec 13, 2013	24.18	24.40	23.90	24.13
5396	NASDAQ	ATRO	Thu, Dec 12, 2013	23.65	24.24	23.65	24.05
5395	NASDAQ	ATRO	Wed, Dec 11, 2013	24.08	24.27	23.48	23.65
5394	NASDAQ	ATRO	Tue, Dec 10, 2013	23.99	24.73	23.91	24.07
5393	NASDAQ	ATRO	Mon, Dec 9, 2013	23.79	24.02	23.18	23.95
5392	NASDAQ	ATRO	Fri, Dec 6, 2013	23.50	23.98	23.24	23.78
5391	NASDAQ	ATRO	Thu, Dec 5, 2013	23.39	23.58	23.09	23.22
5390	NASDAQ	ATRO	Wed, Dec 4, 2013	22.92	23.52	22.77	23.40
5389	NASDAQ	ATRO	Tue, Dec 3, 2013	23.36	23.73	22.96	23.07
5388	NASDAQ	ATRO	Mon, Dec 2, 2013	23.86	23.97	23.25	23.50
5387	NASDAQ	ATRO	Fri, Nov 29, 2013	23.45	23.96	23.34	23.81
5386	NASDAQ	ATRO	Wed, Nov 27, 2013	22.56	23.33	22.45	23.32
5385	NASDAQ	ATRO	Tue, Nov 26, 2013	22.34	22.77	22.24	22.57
5384	NASDAQ	ATRO	Mon, Nov 25, 2013	22.20	22.40	22.09	22.35
5383	NASDAQ	ATRO	Fri, Nov 22, 2013	21.93	22.20	21.87	22.14
5382	NASDAQ	ATRO	Thu, Nov 21, 2013	21.64	22.20	21.64	21.97
5381	NASDAQ	ATRO	Wed, Nov 20, 2013	22.02	22.02	21.41	21.55
5380	NASDAQ	ATRO	Tue, Nov 19, 2013	22.30	22.54	21.89	21.97
5379	NASDAQ	ATRO	Mon, Nov 18, 2013	22.38	22.50	22.20	22.30
5378	NASDAQ	ATRO	Fri, Nov 15, 2013	22.40	22.54	22.20	22.30
5377	NASDAQ	ATRO	Thu, Nov 14, 2013	22.66	22.76	22.38	22.44
5376	NASDAQ	ATRO	Wed, Nov 13, 2013	22.30	22.72	22.30	22.65
5375	NASDAQ	ATRO	Tue, Nov 12, 2013	22.25	22.51	22.04	22.47
5374	NASDAQ	ATRO	Mon, Nov 11, 2013	22.32	22.54	22.23	22.39
5373	NASDAQ	ATRO	Fri, Nov 8, 2013	21.56	22.39	21.56	22.30
5372	NASDAQ	ATRO	Thu, Nov 7, 2013	21.78	21.84	21.49	21.61
5371	NASDAQ	ATRO	Wed, Nov 6, 2013	20.95	21.72	20.94	21.69
5370	NASDAQ	ATRO	Tue, Nov 5, 2013	21.74	22.00	20.55	20.87
5369	NASDAQ	ATRO	Mon, Nov 4, 2013	21.48	22.13	21.45	21.88
5368	NASDAQ	ATRO	Fri, Nov 1, 2013	22.22	22.52	21.44	21.44
5367	NASDAQ	ATRO	Thu, Oct 31, 2013	22.33	22.63	22.17	22.34
5366	NASDAQ	ATRO	Wed, Oct 30, 2013	21.99	22.65	21.91	22.33
5365	NASDAQ	ATRO	Tue, Oct 29, 2013	21.73	22.15	21.56	21.81
5364	NASDAQ	ATRO	Mon, Oct 28, 2013	21.13	21.64	21.08	21.60
5363	NASDAQ	ATRO	Fri, Oct 25, 2013	21.11	21.20	20.88	21.05
5362	NASDAQ	ATRO	Thu, Oct 24, 2013	20.42	21.08	20.41	21.03
5361	NASDAQ	ATRO	Wed, Oct 23, 2013	19.88	20.50	19.88	20.40
5360	NASDAQ	ATRO	Tue, Oct 22, 2013	20.16	20.29	19.92	20.04
5359	NASDAQ	ATRO	Mon, Oct 21, 2013	20.28	20.34	20.00	20.02
5358	NASDAQ	ATRO	Fri, Oct 18, 2013	20.12	20.25	19.85	20.19
5357	NASDAQ	ATRO	Thu, Oct 17, 2013	19.99	20.28	19.87	20.06
5356	NASDAQ	ATRO	Wed, Oct 16, 2013	19.95	20.23	19.60	20.03
5355	NASDAQ	ATRO	Tue, Oct 15, 2013	20.03	20.04	19.67	19.76
5354	NASDAQ	ATRO	Mon, Oct 14, 2013	19.60	20.23	19.44	20.14
5353	NASDAQ	ATRO	Fri, Oct 11, 2013	19.39	19.81	19.37	19.75
5352	NASDAQ	ATRO	Thu, Oct 10, 2013	19.35	19.53	18.82	19.49
5351	NASDAQ	ATRO	Wed, Oct 9, 2013	19.01	19.24	18.75	19.22
5350	NASDAQ	ATRO	Tue, Oct 8, 2013	19.57	19.57	18.76	18.89
5349	NASDAQ	ATRO	Mon, Oct 7, 2013	18.22	18.49	18.15	18.23
5348	NASDAQ	ATRO	Fri, Oct 4, 2013	17.64	18.37	17.46	18.33
5347	NASDAQ	ATRO	Thu, Oct 3, 2013	18.03	18.17	17.35	17.69
5346	NASDAQ	ATRO	Wed, Oct 2, 2013	17.97	18.28	17.93	18.04
5345	NASDAQ	ATRO	Tue, Oct 1, 2013	18.12	18.24	17.78	18.10
5344	NASDAQ	ATRO	Mon, Sep 30, 2013	17.98	18.21	17.87	18.11
5343	NASDAQ	ATRO	Fri, Sep 27, 2013	18.25	18.39	18.00	18.15
5342	NASDAQ	ATRO	Thu, Sep 26, 2013	18.60	18.62	18.19	18.52
5341	NASDAQ	ATRO	Wed, Sep 25, 2013	18.20	18.59	18.18	18.52
5340	NASDAQ	ATRO	Tue, Sep 24, 2013	18.16	18.32	17.67	18.17
5339	NASDAQ	ATRO	Mon, Sep 23, 2013	18.08	18.22	17.81	18.13
5338	NASDAQ	ATRO	Fri, Sep 20, 2013	18.10	18.50	17.92	18.13
5337	NASDAQ	ATRO	Thu, Sep 19, 2013	18.01	18.21	17.89	18.18
5336	NASDAQ	ATRO	Wed, Sep 18, 2013	17.81	18.01	17.51	17.96
5335	NASDAQ	ATRO	Tue, Sep 17, 2013	17.64	17.85	17.54	17.84
5334	NASDAQ	ATRO	Mon, Sep 16, 2013	17.65	17.81	17.53	17.68
5333	NASDAQ	ATRO	Fri, Sep 13, 2013	17.38	17.54	17.28	17.49
5332	NASDAQ	ATRO	Thu, Sep 12, 2013	17.56	17.58	17.16	17.37
5331	NASDAQ	ATRO	Wed, Sep 11, 2013	17.18	17.57	17.14	17.51
5330	NASDAQ	ATRO	Tue, Sep 10, 2013	17.34	17.46	17.06	17.25
5329	NASDAQ	ATRO	Mon, Sep 9, 2013	17.13	17.36	17.03	17.31
5328	NASDAQ	ATRO	Fri, Sep 6, 2013	17.40	17.44	16.91	17.02
5327	NASDAQ	ATRO	Thu, Sep 5, 2013	17.47	17.58	17.23	17.29
5326	NASDAQ	ATRO	Wed, Sep 4, 2013	17.07	17.84	17.07	17.41
5325	NASDAQ	ATRO	Tue, Sep 3, 2013	17.12	17.40	16.92	17.06
5324	NASDAQ	ATRO	Fri, Aug 30, 2013	16.96	17.08	16.84	16.95
5323	NASDAQ	ATRO	Thu, Aug 29, 2013	16.70	17.02	16.66	17.02
5322	NASDAQ	ATRO	Wed, Aug 28, 2013	16.56	16.76	16.56	16.71
5321	NASDAQ	ATRO	Tue, Aug 27, 2013	16.57	16.62	16.50	16.58
5320	NASDAQ	ATRO	Mon, Aug 26, 2013	16.53	16.85	16.44	16.76
5319	NASDAQ	ATRO	Fri, Aug 23, 2013	16.49	16.55	16.15	16.48
5318	NASDAQ	ATRO	Thu, Aug 22, 2013	15.69	16.67	15.69	16.47
5317	NASDAQ	ATRO	Wed, Aug 21, 2013	15.44	16.02	15.44	15.74
5316	NASDAQ	ATRO	Tue, Aug 20, 2013	15.44	15.58	15.37	15.54
5315	NASDAQ	ATRO	Mon, Aug 19, 2013	15.43	15.59	15.29	15.46
5314	NASDAQ	ATRO	Fri, Aug 16, 2013	15.27	15.55	15.20	15.40
5313	NASDAQ	ATRO	Thu, Aug 15, 2013	15.12	15.46	15.12	15.33
5312	NASDAQ	ATRO	Wed, Aug 14, 2013	15.02	15.28	15.02	15.22
5311	NASDAQ	ATRO	Tue, Aug 13, 2013	14.98	15.11	14.90	15.04
5310	NASDAQ	ATRO	Mon, Aug 12, 2013	14.77	15.12	14.71	15.00
5309	NASDAQ	ATRO	Fri, Aug 9, 2013	14.79	14.98	14.58	14.88
5308	NASDAQ	ATRO	Thu, Aug 8, 2013	14.61	15.05	14.43	14.87
5307	NASDAQ	ATRO	Wed, Aug 7, 2013	14.56	14.57	14.21	14.55
5306	NASDAQ	ATRO	Tue, Aug 6, 2013	14.53	14.61	14.39	14.57
5305	NASDAQ	ATRO	Mon, Aug 5, 2013	14.03	14.61	14.03	14.57
5304	NASDAQ	ATRO	Fri, Aug 2, 2013	14.18	14.36	14.04	14.09
5303	NASDAQ	ATRO	Thu, Aug 1, 2013	14.51	14.75	14.12	14.27
5302	NASDAQ	ATRO	Wed, Jul 31, 2013	14.20	14.52	13.30	14.40
5301	NASDAQ	ATRO	Tue, Jul 30, 2013	15.12	15.16	14.81	15.11
5300	NASDAQ	ATRO	Mon, Jul 29, 2013	14.86	15.08	14.59	15.01
5299	NASDAQ	ATRO	Fri, Jul 26, 2013	15.17	15.17	14.63	14.83
5298	NASDAQ	ATRO	Thu, Jul 25, 2013	15.06	15.31	15.01	15.30
5297	NASDAQ	ATRO	Wed, Jul 24, 2013	15.20	15.34	14.99	15.02
5296	NASDAQ	ATRO	Tue, Jul 23, 2013	15.38	15.38	15.13	15.18
5295	NASDAQ	ATRO	Mon, Jul 22, 2013	14.91	15.30	14.85	15.26
5294	NASDAQ	ATRO	Fri, Jul 19, 2013	15.08	15.08	14.72	14.99
5293	NASDAQ	ATRO	Thu, Jul 18, 2013	15.12	15.21	15.06	15.10
5292	NASDAQ	ATRO	Wed, Jul 17, 2013	15.25	15.25	15.04	15.11
5291	NASDAQ	ATRO	Tue, Jul 16, 2013	15.58	15.58	15.07	15.12
5290	NASDAQ	ATRO	Mon, Jul 15, 2013	15.50	15.65	15.49	15.60
5289	NASDAQ	ATRO	Fri, Jul 12, 2013	15.36	15.49	15.30	15.46
5288	NASDAQ	ATRO	Thu, Jul 11, 2013	15.30	15.45	14.98	15.40
5287	NASDAQ	ATRO	Wed, Jul 10, 2013	15.16	15.37	14.87	15.14
5286	NASDAQ	ATRO	Tue, Jul 9, 2013	15.38	15.50	15.01	15.13
5285	NASDAQ	ATRO	Mon, Jul 8, 2013	15.51	15.63	15.11	15.27
5284	NASDAQ	ATRO	Fri, Jul 5, 2013	15.03	15.43	14.96	15.40
5283	NASDAQ	ATRO	Wed, Jul 3, 2013	14.79	14.84	14.55	14.80
5282	NASDAQ	ATRO	Tue, Jul 2, 2013	14.59	14.90	14.18	14.79
5281	NASDAQ	ATRO	Mon, Jul 1, 2013	15.03	15.04	14.54	14.61
5280	NASDAQ	ATRO	Fri, Jun 28, 2013	14.69	15.03	14.62	14.89
5279	NASDAQ	ATRO	Thu, Jun 27, 2013	14.65	14.77	14.48	14.74
5278	NASDAQ	ATRO	Wed, Jun 26, 2013	14.32	14.55	14.10	14.47
5277	NASDAQ	ATRO	Tue, Jun 25, 2013	13.99	14.34	13.83	14.14
5276	NASDAQ	ATRO	Mon, Jun 24, 2013	13.93	14.09	13.70	13.82
5275	NASDAQ	ATRO	Fri, Jun 21, 2013	14.26	14.65	13.96	14.02
5274	NASDAQ	ATRO	Thu, Jun 20, 2013	14.67	14.67	14.04	14.18
5273	NASDAQ	ATRO	Wed, Jun 19, 2013	14.99	15.05	14.72	14.81
5272	NASDAQ	ATRO	Tue, Jun 18, 2013	14.62	15.05	14.62	14.96
5271	NASDAQ	ATRO	Mon, Jun 17, 2013	14.42	14.92	14.42	14.63
5270	NASDAQ	ATRO	Fri, Jun 14, 2013	14.53	14.53	14.20	14.26
5269	NASDAQ	ATRO	Thu, Jun 13, 2013	14.54	14.57	14.47	14.55
5268	NASDAQ	ATRO	Wed, Jun 12, 2013	14.58	14.67	14.27	14.49
5267	NASDAQ	ATRO	Tue, Jun 11, 2013	14.18	14.60	14.13	14.47
5266	NASDAQ	ATRO	Mon, Jun 10, 2013	13.96	14.44	13.83	14.40
5265	NASDAQ	ATRO	Fri, Jun 7, 2013	13.89	14.01	13.81	13.91
5264	NASDAQ	ATRO	Thu, Jun 6, 2013	13.95	14.12	13.48	13.78
5263	NASDAQ	ATRO	Wed, Jun 5, 2013	14.10	14.34	13.73	13.90
5262	NASDAQ	ATRO	Tue, Jun 4, 2013	13.57	14.16	13.43	14.08
5261	NASDAQ	ATRO	Mon, Jun 3, 2013	13.14	13.71	13.08	13.58
5260	NASDAQ	ATRO	Fri, May 31, 2013	13.01	13.27	12.91	13.08
5259	NASDAQ	ATRO	Thu, May 30, 2013	12.91	13.16	12.67	13.14
5258	NASDAQ	ATRO	Wed, May 29, 2013	12.88	13.05	12.66	12.82
5257	NASDAQ	ATRO	Tue, May 28, 2013	12.87	13.01	12.73	12.90
5256	NASDAQ	ATRO	Fri, May 24, 2013	12.47	12.74	12.40	12.73
5255	NASDAQ	ATRO	Thu, May 23, 2013	12.22	12.63	12.22	12.62
5254	NASDAQ	ATRO	Wed, May 22, 2013	12.08	12.55	12.08	12.41
5253	NASDAQ	ATRO	Tue, May 21, 2013	11.81	12.09	11.74	12.08
5252	NASDAQ	ATRO	Mon, May 20, 2013	12.04	12.20	11.66	11.77
5251	NASDAQ	ATRO	Fri, May 17, 2013	11.90	12.15	11.84	12.12
5250	NASDAQ	ATRO	Thu, May 16, 2013	11.94	12.04	11.70	11.85
5249	NASDAQ	ATRO	Wed, May 15, 2013	11.95	12.14	11.84	11.96
5248	NASDAQ	ATRO	Tue, May 14, 2013	11.88	12.06	11.81	12.04
5247	NASDAQ	ATRO	Mon, May 13, 2013	11.82	11.83	11.68	11.82
5246	NASDAQ	ATRO	Fri, May 10, 2013	11.95	11.95	11.60	11.84
5245	NASDAQ	ATRO	Thu, May 9, 2013	12.00	12.14	11.82	11.95
5244	NASDAQ	ATRO	Wed, May 8, 2013	12.05	12.09	11.84	11.99
5243	NASDAQ	ATRO	Tue, May 7, 2013	11.56	12.12	11.34	12.02
5242	NASDAQ	ATRO	Mon, May 6, 2013	10.75	11.64	10.75	11.51
5241	NASDAQ	ATRO	Fri, May 3, 2013	10.38	10.60	10.38	10.49
5240	NASDAQ	ATRO	Thu, May 2, 2013	10.24	10.38	10.15	10.25
5239	NASDAQ	ATRO	Wed, May 1, 2013	10.04	10.33	10.00	10.19
5238	NASDAQ	ATRO	Tue, Apr 30, 2013	10.09	10.17	10.03	10.13
5237	NASDAQ	ATRO	Mon, Apr 29, 2013	9.69	10.07	9.69	10.05
5236	NASDAQ	ATRO	Fri, Apr 26, 2013	9.79	9.86	9.48	9.66
5235	NASDAQ	ATRO	Thu, Apr 25, 2013	9.68	9.91	9.68	9.78
5234	NASDAQ	ATRO	Wed, Apr 24, 2013	9.81	9.81	9.63	9.67
5233	NASDAQ	ATRO	Tue, Apr 23, 2013	9.37	9.83	9.27	9.79
5232	NASDAQ	ATRO	Mon, Apr 22, 2013	9.36	9.43	9.01	9.25
5231	NASDAQ	ATRO	Fri, Apr 19, 2013	9.29	9.42	9.24	9.32
5230	NASDAQ	ATRO	Thu, Apr 18, 2013	9.54	9.54	9.17	9.27
5229	NASDAQ	ATRO	Wed, Apr 17, 2013	9.74	9.89	9.41	9.51
5228	NASDAQ	ATRO	Tue, Apr 16, 2013	10.06	10.06	9.67	9.85
5227	NASDAQ	ATRO	Mon, Apr 15, 2013	10.17	10.23	9.84	9.95
5226	NASDAQ	ATRO	Fri, Apr 12, 2013	10.13	10.32	10.06	10.28
5225	NASDAQ	ATRO	Thu, Apr 11, 2013	10.18	10.23	10.07	10.17
5224	NASDAQ	ATRO	Wed, Apr 10, 2013	10.07	10.22	9.95	10.18
5223	NASDAQ	ATRO	Tue, Apr 9, 2013	10.04	10.12	9.87	10.03
5222	NASDAQ	ATRO	Mon, Apr 8, 2013	10.11	10.11	9.73	10.03
5221	NASDAQ	ATRO	Fri, Apr 5, 2013	9.75	10.18	9.75	10.03
5220	NASDAQ	ATRO	Thu, Apr 4, 2013	10.15	10.20	9.82	9.94
5219	NASDAQ	ATRO	Wed, Apr 3, 2013	10.19	10.34	9.99	10.08
5218	NASDAQ	ATRO	Tue, Apr 2, 2013	10.44	10.47	10.15	10.18
5217	NASDAQ	ATRO	Mon, Apr 1, 2013	10.84	10.84	10.22	10.36
5216	NASDAQ	ATRO	Thu, Mar 28, 2013	10.84	10.92	10.81	10.87
5215	NASDAQ	ATRO	Wed, Mar 27, 2013	10.64	10.84	10.63	10.81
5214	NASDAQ	ATRO	Tue, Mar 26, 2013	10.71	10.84	10.65	10.79
5213	NASDAQ	ATRO	Mon, Mar 25, 2013	10.61	10.66	10.41	10.60
5212	NASDAQ	ATRO	Fri, Mar 22, 2013	10.40	10.66	10.40	10.56
5211	NASDAQ	ATRO	Thu, Mar 21, 2013	10.54	10.75	10.33	10.36
5210	NASDAQ	ATRO	Wed, Mar 20, 2013	10.47	10.79	10.47	10.69
5209	NASDAQ	ATRO	Tue, Mar 19, 2013	10.33	10.38	10.29	10.37
5208	NASDAQ	ATRO	Mon, Mar 18, 2013	10.23	10.40	10.23	10.34
5207	NASDAQ	ATRO	Fri, Mar 15, 2013	10.42	10.48	10.38	10.42
5206	NASDAQ	ATRO	Thu, Mar 14, 2013	10.35	10.46	10.35	10.42
5205	NASDAQ	ATRO	Wed, Mar 13, 2013	10.35	10.43	10.32	10.42
5204	NASDAQ	ATRO	Tue, Mar 12, 2013	10.34	10.37	10.24	10.31
5203	NASDAQ	ATRO	Mon, Mar 11, 2013	10.36	10.38	10.23	10.35
5202	NASDAQ	ATRO	Fri, Mar 8, 2013	10.39	10.42	10.29	10.38
5201	NASDAQ	ATRO	Thu, Mar 7, 2013	10.41	10.44	10.08	10.32
5200	NASDAQ	ATRO	Wed, Mar 6, 2013	10.46	10.53	10.21	10.44
5199	NASDAQ	ATRO	Tue, Mar 5, 2013	10.20	10.61	10.18	10.44
5198	NASDAQ	ATRO	Mon, Mar 4, 2013	10.01	10.12	10.00	10.11
5197	NASDAQ	ATRO	Fri, Mar 1, 2013	9.91	10.18	9.91	10.06
5196	NASDAQ	ATRO	Thu, Feb 28, 2013	10.02	10.17	10.00	10.04
5195	NASDAQ	ATRO	Wed, Feb 27, 2013	10.02	10.13	10.01	10.02
5194	NASDAQ	ATRO	Tue, Feb 26, 2013	10.06	10.11	9.87	10.02
5193	NASDAQ	ATRO	Mon, Feb 25, 2013	10.11	10.19	9.94	10.01
5192	NASDAQ	ATRO	Fri, Feb 22, 2013	10.09	10.11	10.05	10.09
5191	NASDAQ	ATRO	Thu, Feb 21, 2013	10.05	10.11	9.98	10.02
5190	NASDAQ	ATRO	Wed, Feb 20, 2013	10.07	10.17	10.02	10.07
5189	NASDAQ	ATRO	Tue, Feb 19, 2013	10.03	10.15	10.00	10.08
5188	NASDAQ	ATRO	Fri, Feb 15, 2013	9.94	10.11	9.91	10.01
5187	NASDAQ	ATRO	Thu, Feb 14, 2013	9.92	10.02	9.85	9.89
5186	NASDAQ	ATRO	Wed, Feb 13, 2013	9.87	10.04	9.87	9.98
5185	NASDAQ	ATRO	Tue, Feb 12, 2013	9.54	9.83	9.54	9.82
5184	NASDAQ	ATRO	Mon, Feb 11, 2013	9.27	9.83	9.25	9.53
5183	NASDAQ	ATRO	Fri, Feb 8, 2013	9.01	9.11	8.98	9.08
5182	NASDAQ	ATRO	Thu, Feb 7, 2013	8.94	8.98	8.82	8.98
5181	NASDAQ	ATRO	Wed, Feb 6, 2013	8.77	8.99	8.77	8.97
5180	NASDAQ	ATRO	Tue, Feb 5, 2013	8.51	8.87	8.35	8.85
5179	NASDAQ	ATRO	Mon, Feb 4, 2013	8.74	8.84	8.35	8.42
5178	NASDAQ	ATRO	Fri, Feb 1, 2013	8.41	8.93	8.40	8.81
5177	NASDAQ	ATRO	Thu, Jan 31, 2013	8.34	8.40	8.30	8.35
5176	NASDAQ	ATRO	Wed, Jan 30, 2013	8.45	8.56	8.34	8.38
5175	NASDAQ	ATRO	Tue, Jan 29, 2013	8.41	8.56	8.29	8.48
5174	NASDAQ	ATRO	Mon, Jan 28, 2013	8.36	8.42	8.09	8.37
5173	NASDAQ	ATRO	Fri, Jan 25, 2013	8.39	8.39	8.31	8.37
5172	NASDAQ	ATRO	Thu, Jan 24, 2013	8.38	8.43	8.31	8.37
5171	NASDAQ	ATRO	Wed, Jan 23, 2013	8.29	8.39	8.13	8.38
5170	NASDAQ	ATRO	Tue, Jan 22, 2013	8.45	8.45	8.21	8.30
5169	NASDAQ	ATRO	Fri, Jan 18, 2013	8.50	8.61	8.25	8.45
5168	NASDAQ	ATRO	Thu, Jan 17, 2013	8.39	8.58	8.34	8.49
5167	NASDAQ	ATRO	Wed, Jan 16, 2013	8.52	8.52	8.37	8.37
5166	NASDAQ	ATRO	Tue, Jan 15, 2013	8.59	8.72	8.53	8.57
5165	NASDAQ	ATRO	Mon, Jan 14, 2013	8.64	8.73	8.57	8.62
5164	NASDAQ	ATRO	Fri, Jan 11, 2013	8.75	8.80	8.65	8.66
5163	NASDAQ	ATRO	Thu, Jan 10, 2013	8.76	8.76	8.69	8.74
5162	NASDAQ	ATRO	Wed, Jan 9, 2013	8.64	8.80	8.64	8.75
5161	NASDAQ	ATRO	Tue, Jan 8, 2013	8.59	8.66	8.52	8.66
5160	NASDAQ	ATRO	Mon, Jan 7, 2013	8.59	8.67	8.53	8.62
5159	NASDAQ	ATRO	Fri, Jan 4, 2013	8.87	8.95	8.65	8.68
5158	NASDAQ	ATRO	Thu, Jan 3, 2013	8.96	8.96	8.72	8.81
5157	NASDAQ	ATRO	Wed, Jan 2, 2013	8.62	9.15	8.31	8.97
5156	NASDAQ	ATRO	Mon, Dec 31, 2012	7.52	8.39	7.43	8.34
5155	NASDAQ	ATRO	Fri, Dec 28, 2012	7.78	7.92	7.46	7.52
5154	NASDAQ	ATRO	Thu, Dec 27, 2012	8.04	8.06	7.64	7.80
5153	NASDAQ	ATRO	Wed, Dec 26, 2012	7.98	8.11	7.98	8.06
5152	NASDAQ	ATRO	Mon, Dec 24, 2012	8.05	8.05	7.97	7.98
5151	NASDAQ	ATRO	Fri, Dec 21, 2012	8.21	8.21	8.06	8.15
5150	NASDAQ	ATRO	Thu, Dec 20, 2012	8.11	8.34	8.11	8.29
5149	NASDAQ	ATRO	Wed, Dec 19, 2012	7.94	8.19	7.92	8.14
5148	NASDAQ	ATRO	Tue, Dec 18, 2012	7.71	8.01	7.71	8.00
5147	NASDAQ	ATRO	Mon, Dec 17, 2012	7.55	7.73	7.47	7.70
5146	NASDAQ	ATRO	Fri, Dec 14, 2012	7.44	7.65	7.37	7.53
5145	NASDAQ	ATRO	Thu, Dec 13, 2012	7.47	7.66	7.32	7.44
5144	NASDAQ	ATRO	Wed, Dec 12, 2012	7.57	7.69	7.46	7.49
5143	NASDAQ	ATRO	Tue, Dec 11, 2012	7.51	7.66	7.46	7.56
5142	NASDAQ	ATRO	Mon, Dec 10, 2012	7.36	7.48	7.36	7.47
5141	NASDAQ	ATRO	Fri, Dec 7, 2012	7.47	7.47	7.29	7.36
5140	NASDAQ	ATRO	Thu, Dec 6, 2012	7.20	7.31	7.01	7.28
5139	NASDAQ	ATRO	Wed, Dec 5, 2012	7.35	7.36	7.20	7.23
5138	NASDAQ	ATRO	Tue, Dec 4, 2012	7.32	7.38	7.28	7.30
5137	NASDAQ	ATRO	Mon, Dec 3, 2012	7.36	7.46	7.22	7.31
5136	NASDAQ	ATRO	Fri, Nov 30, 2012	7.38	7.41	7.23	7.32
5135	NASDAQ	ATRO	Thu, Nov 29, 2012	7.36	7.48	7.28	7.34
5134	NASDAQ	ATRO	Wed, Nov 28, 2012	7.41	7.42	7.25	7.29
5133	NASDAQ	ATRO	Tue, Nov 27, 2012	7.45	7.63	7.43	7.47
5132	NASDAQ	ATRO	Mon, Nov 26, 2012	7.68	7.74	7.35	7.45
5131	NASDAQ	ATRO	Fri, Nov 23, 2012	7.64	7.75	7.56	7.72
5130	NASDAQ	ATRO	Wed, Nov 21, 2012	7.61	7.62	7.33	7.58
5129	NASDAQ	ATRO	Tue, Nov 20, 2012	7.61	7.63	7.41	7.59
5128	NASDAQ	ATRO	Mon, Nov 19, 2012	7.55	7.64	7.41	7.59
5127	NASDAQ	ATRO	Fri, Nov 16, 2012	7.62	7.63	7.32	7.45
5126	NASDAQ	ATRO	Thu, Nov 15, 2012	7.79	7.95	7.62	7.67
5125	NASDAQ	ATRO	Wed, Nov 14, 2012	8.46	8.46	7.92	7.92
5124	NASDAQ	ATRO	Tue, Nov 13, 2012	8.37	8.37	8.28	8.33
5123	NASDAQ	ATRO	Mon, Nov 12, 2012	8.33	8.48	8.33	8.39
5122	NASDAQ	ATRO	Fri, Nov 9, 2012	7.99	8.34	7.96	8.32
5121	NASDAQ	ATRO	Thu, Nov 8, 2012	8.01	8.14	7.98	8.03
5120	NASDAQ	ATRO	Wed, Nov 7, 2012	8.15	8.23	7.86	8.06
5119	NASDAQ	ATRO	Tue, Nov 6, 2012	8.54	8.67	8.25	8.34
5118	NASDAQ	ATRO	Mon, Nov 5, 2012	8.18	8.45	8.18	8.40
5117	NASDAQ	ATRO	Fri, Nov 2, 2012	8.40	8.50	8.17	8.21
5116	NASDAQ	ATRO	Thu, Nov 1, 2012	8.44	8.50	8.17	8.37
5115	NASDAQ	ATRO	Wed, Oct 31, 2012	8.41	8.47	8.29	8.46
5114	NASDAQ	ATRO	Fri, Oct 26, 2012	8.63	8.65	8.23	8.38
5113	NASDAQ	ATRO	Thu, Oct 25, 2012	8.60	8.74	8.45	8.60
5112	NASDAQ	ATRO	Wed, Oct 24, 2012	8.59	8.61	8.24	8.30
5111	NASDAQ	ATRO	Tue, Oct 23, 2012	8.62	8.66	8.44	8.53
5110	NASDAQ	ATRO	Mon, Oct 22, 2012	8.68	8.85	8.58	8.70
5109	NASDAQ	ATRO	Fri, Oct 19, 2012	9.03	9.06	8.59	8.68
5108	NASDAQ	ATRO	Thu, Oct 18, 2012	9.03	9.27	8.96	9.13
5107	NASDAQ	ATRO	Wed, Oct 17, 2012	9.38	9.39	8.93	9.09
5106	NASDAQ	ATRO	Tue, Oct 16, 2012	9.52	9.74	9.19	9.38
5105	NASDAQ	ATRO	Mon, Oct 15, 2012	9.54	9.55	9.41	9.48
5104	NASDAQ	ATRO	Fri, Oct 12, 2012	9.49	9.56	9.43	9.48
5103	NASDAQ	ATRO	Thu, Oct 11, 2012	9.52	9.56	9.46	9.46
5102	NASDAQ	ATRO	Wed, Oct 10, 2012	9.36	9.51	9.33	9.46
5101	NASDAQ	ATRO	Tue, Oct 9, 2012	9.46	9.50	9.33	9.38
5100	NASDAQ	ATRO	Mon, Oct 8, 2012	9.47	9.53	9.43	9.51
5099	NASDAQ	ATRO	Fri, Oct 5, 2012	9.64	9.75	9.45	9.51
5098	NASDAQ	ATRO	Thu, Oct 4, 2012	9.62	9.62	9.51	9.57
5097	NASDAQ	ATRO	Wed, Oct 3, 2012	9.66	9.84	9.51	9.61
5096	NASDAQ	ATRO	Tue, Oct 2, 2012	9.73	9.76	9.56	9.69
5095	NASDAQ	ATRO	Mon, Oct 1, 2012	9.81	10.03	9.66	9.76
5094	NASDAQ	ATRO	Fri, Sep 28, 2012	9.67	9.96	9.58	9.76
5093	NASDAQ	ATRO	Thu, Sep 27, 2012	9.74	9.83	9.64	9.74
5092	NASDAQ	ATRO	Wed, Sep 26, 2012	9.57	9.71	9.42	9.61
5091	NASDAQ	ATRO	Tue, Sep 25, 2012	9.76	9.84	9.49	9.51
5090	NASDAQ	ATRO	Mon, Sep 24, 2012	9.51	9.77	9.47	9.74
5089	NASDAQ	ATRO	Fri, Sep 21, 2012	9.69	9.69	9.43	9.52
5088	NASDAQ	ATRO	Thu, Sep 20, 2012	9.41	9.59	9.38	9.51
5087	NASDAQ	ATRO	Wed, Sep 19, 2012	9.45	9.52	9.10	9.50
5086	NASDAQ	ATRO	Tue, Sep 18, 2012	9.38	9.50	9.28	9.41
5085	NASDAQ	ATRO	Mon, Sep 17, 2012	9.44	9.44	9.24	9.42
5084	NASDAQ	ATRO	Fri, Sep 14, 2012	9.42	9.59	9.33	9.51
5083	NASDAQ	ATRO	Thu, Sep 13, 2012	8.87	9.39	8.87	9.37
5082	NASDAQ	ATRO	Wed, Sep 12, 2012	8.73	8.90	8.59	8.90
5081	NASDAQ	ATRO	Tue, Sep 11, 2012	8.56	8.74	8.56	8.67
5080	NASDAQ	ATRO	Mon, Sep 10, 2012	8.86	8.86	8.55	8.60
5079	NASDAQ	ATRO	Fri, Sep 7, 2012	8.99	8.99	8.84	8.84
5078	NASDAQ	ATRO	Thu, Sep 6, 2012	8.86	8.97	8.86	8.92
5077	NASDAQ	ATRO	Wed, Sep 5, 2012	8.94	9.03	8.77	8.82
5076	NASDAQ	ATRO	Tue, Sep 4, 2012	8.86	9.08	8.66	8.95
5075	NASDAQ	ATRO	Fri, Aug 31, 2012	9.00	9.00	8.78	8.87
5074	NASDAQ	ATRO	Thu, Aug 30, 2012	9.05	9.14	8.87	8.88
5073	NASDAQ	ATRO	Wed, Aug 29, 2012	8.68	9.20	8.68	9.13
5072	NASDAQ	ATRO	Tue, Aug 28, 2012	8.63	8.85	8.50	8.65
5071	NASDAQ	ATRO	Mon, Aug 27, 2012	8.64	8.67	8.48	8.62
5070	NASDAQ	ATRO	Fri, Aug 24, 2012	8.63	8.79	8.57	8.61
5069	NASDAQ	ATRO	Thu, Aug 23, 2012	8.76	8.84	8.62	8.67
5068	NASDAQ	ATRO	Wed, Aug 22, 2012	8.76	8.81	8.66	8.75
5067	NASDAQ	ATRO	Tue, Aug 21, 2012	8.92	8.98	8.71	8.81
5066	NASDAQ	ATRO	Mon, Aug 20, 2012	9.08	9.08	8.75	8.85
5065	NASDAQ	ATRO	Fri, Aug 17, 2012	9.06	9.13	8.98	9.09
5064	NASDAQ	ATRO	Thu, Aug 16, 2012	8.83	9.11	8.73	9.10
5063	NASDAQ	ATRO	Wed, Aug 15, 2012	8.99	8.99	8.69	8.85
5062	NASDAQ	ATRO	Tue, Aug 14, 2012	9.33	9.33	8.86	8.94
5061	NASDAQ	ATRO	Mon, Aug 13, 2012	9.34	9.37	9.19	9.31
5060	NASDAQ	ATRO	Fri, Aug 10, 2012	9.59	9.62	9.36	9.38
5059	NASDAQ	ATRO	Thu, Aug 9, 2012	9.46	9.61	9.45	9.61
5058	NASDAQ	ATRO	Wed, Aug 8, 2012	9.42	9.56	9.30	9.51
5057	NASDAQ	ATRO	Tue, Aug 7, 2012	9.73	9.93	9.51	9.51
5056	NASDAQ	ATRO	Mon, Aug 6, 2012	9.86	9.98	9.69	9.70
5055	NASDAQ	ATRO	Fri, Aug 3, 2012	9.91	10.16	9.59	9.89
5054	NASDAQ	ATRO	Thu, Aug 2, 2012	9.33	9.82	9.33	9.76
5053	NASDAQ	ATRO	Wed, Aug 1, 2012	9.58	9.60	9.38	9.44
5052	NASDAQ	ATRO	Tue, Jul 31, 2012	9.45	9.58	9.18	9.53
5051	NASDAQ	ATRO	Mon, Jul 30, 2012	9.71	9.89	9.50	9.51
5050	NASDAQ	ATRO	Fri, Jul 27, 2012	9.39	9.78	9.30	9.74
5049	NASDAQ	ATRO	Thu, Jul 26, 2012	9.40	9.47	9.15	9.31
5048	NASDAQ	ATRO	Wed, Jul 25, 2012	9.16	9.30	8.98	9.25
5047	NASDAQ	ATRO	Tue, Jul 24, 2012	9.19	9.19	8.96	9.06
5046	NASDAQ	ATRO	Mon, Jul 23, 2012	9.28	9.34	9.12	9.15
5045	NASDAQ	ATRO	Fri, Jul 20, 2012	9.36	9.51	9.35	9.49
5044	NASDAQ	ATRO	Thu, Jul 19, 2012	9.47	9.64	9.40	9.51
5043	NASDAQ	ATRO	Wed, Jul 18, 2012	9.35	9.63	9.35	9.47
5042	NASDAQ	ATRO	Tue, Jul 17, 2012	9.39	9.46	9.26	9.40
5041	NASDAQ	ATRO	Mon, Jul 16, 2012	9.22	9.40	9.10	9.38
5040	NASDAQ	ATRO	Fri, Jul 13, 2012	9.21	9.32	9.21	9.27
5039	NASDAQ	ATRO	Thu, Jul 12, 2012	9.03	9.27	9.00	9.20
5038	NASDAQ	ATRO	Wed, Jul 11, 2012	8.99	9.13	8.95	9.11
5037	NASDAQ	ATRO	Tue, Jul 10, 2012	8.96	9.06	8.87	8.94
5036	NASDAQ	ATRO	Mon, Jul 9, 2012	8.71	8.94	8.69	8.88
5035	NASDAQ	ATRO	Fri, Jul 6, 2012	8.61	8.73	8.60	8.69
5034	NASDAQ	ATRO	Thu, Jul 5, 2012	9.12	9.15	8.71	8.72
5033	NASDAQ	ATRO	Tue, Jul 3, 2012	8.93	9.14	8.91	9.13
5032	NASDAQ	ATRO	Mon, Jul 2, 2012	8.96	8.98	8.76	8.97
5031	NASDAQ	ATRO	Fri, Jun 29, 2012	8.69	9.08	8.63	8.95
5030	NASDAQ	ATRO	Thu, Jun 28, 2012	8.30	8.51	8.20	8.49
5029	NASDAQ	ATRO	Wed, Jun 27, 2012	8.28	8.43	8.28	8.36
5028	NASDAQ	ATRO	Tue, Jun 26, 2012	8.45	8.49	8.16	8.25
5027	NASDAQ	ATRO	Mon, Jun 25, 2012	8.48	8.60	8.31	8.40
5026	NASDAQ	ATRO	Fri, Jun 22, 2012	8.62	8.66	8.55	8.59
5025	NASDAQ	ATRO	Thu, Jun 21, 2012	8.87	8.87	8.53	8.58
5024	NASDAQ	ATRO	Wed, Jun 20, 2012	8.84	8.89	8.67	8.84
5023	NASDAQ	ATRO	Tue, Jun 19, 2012	8.52	8.88	8.48	8.82
5022	NASDAQ	ATRO	Mon, Jun 18, 2012	8.55	8.56	8.40	8.49
5021	NASDAQ	ATRO	Fri, Jun 15, 2012	8.11	8.65	8.06	8.58
5020	NASDAQ	ATRO	Thu, Jun 14, 2012	8.19	8.26	7.99	8.10
5019	NASDAQ	ATRO	Wed, Jun 13, 2012	8.31	8.35	8.13	8.19
5018	NASDAQ	ATRO	Tue, Jun 12, 2012	8.20	8.39	8.03	8.34
5017	NASDAQ	ATRO	Mon, Jun 11, 2012	8.43	8.44	8.17	8.18
5016	NASDAQ	ATRO	Fri, Jun 8, 2012	8.23	8.43	8.17	8.36
5015	NASDAQ	ATRO	Thu, Jun 7, 2012	8.46	8.46	8.15	8.23
5014	NASDAQ	ATRO	Wed, Jun 6, 2012	8.02	8.35	7.99	8.34
5013	NASDAQ	ATRO	Tue, Jun 5, 2012	7.93	8.04	7.81	7.96
5012	NASDAQ	ATRO	Mon, Jun 4, 2012	7.82	8.12	7.73	7.96
5011	NASDAQ	ATRO	Fri, Jun 1, 2012	7.91	8.08	7.78	7.81
5010	NASDAQ	ATRO	Thu, May 31, 2012	8.28	8.28	7.97	8.09
5009	NASDAQ	ATRO	Wed, May 30, 2012	8.17	8.31	8.14	8.23
5008	NASDAQ	ATRO	Tue, May 29, 2012	8.27	8.50	8.23	8.27
5007	NASDAQ	ATRO	Fri, May 25, 2012	8.42	8.42	8.21	8.27
5006	NASDAQ	ATRO	Thu, May 24, 2012	8.22	8.44	8.12	8.44
5005	NASDAQ	ATRO	Wed, May 23, 2012	8.16	8.25	7.80	8.20
5004	NASDAQ	ATRO	Tue, May 22, 2012	8.39	8.48	8.21	8.28
5003	NASDAQ	ATRO	Mon, May 21, 2012	8.48	8.49	8.34	8.42
5002	NASDAQ	ATRO	Fri, May 18, 2012	8.43	8.57	8.31	8.42
5001	NASDAQ	ATRO	Thu, May 17, 2012	8.84	8.87	8.44	8.45
5000	NASDAQ	ATRO	Wed, May 16, 2012	9.09	9.11	8.84	8.88
4999	NASDAQ	ATRO	Tue, May 15, 2012	8.99	9.15	8.93	9.01
4998	NASDAQ	ATRO	Mon, May 14, 2012	9.06	9.15	8.93	8.95
4997	NASDAQ	ATRO	Fri, May 11, 2012	9.19	9.31	9.10	9.18
4996	NASDAQ	ATRO	Thu, May 10, 2012	9.51	9.59	9.28	9.36
4995	NASDAQ	ATRO	Wed, May 9, 2012	9.45	9.51	9.33	9.45
4994	NASDAQ	ATRO	Tue, May 8, 2012	9.66	9.75	9.43	9.57
4993	NASDAQ	ATRO	Mon, May 7, 2012	9.66	9.80	9.61	9.71
4992	NASDAQ	ATRO	Fri, May 4, 2012	9.81	9.81	9.60	9.66
4991	NASDAQ	ATRO	Thu, May 3, 2012	10.24	10.34	9.59	9.81
4990	NASDAQ	ATRO	Wed, May 2, 2012	9.91	10.46	9.88	10.34
4989	NASDAQ	ATRO	Tue, May 1, 2012	10.13	10.45	9.91	9.96
4988	NASDAQ	ATRO	Mon, Apr 30, 2012	10.22	10.27	10.03	10.06
4987	NASDAQ	ATRO	Fri, Apr 27, 2012	10.09	10.33	10.01	10.31
4986	NASDAQ	ATRO	Thu, Apr 26, 2012	10.11	10.21	10.02	10.02
4985	NASDAQ	ATRO	Wed, Apr 25, 2012	10.16	10.42	10.11	10.16
4984	NASDAQ	ATRO	Tue, Apr 24, 2012	9.80	10.08	9.76	10.08
4983	NASDAQ	ATRO	Mon, Apr 23, 2012	10.08	10.24	9.75	9.76
4982	NASDAQ	ATRO	Fri, Apr 20, 2012	9.70	10.34	9.57	10.27
4981	NASDAQ	ATRO	Thu, Apr 19, 2012	9.58	9.68	9.47	9.48
4980	NASDAQ	ATRO	Wed, Apr 18, 2012	9.74	9.87	9.48	9.53
4979	NASDAQ	ATRO	Tue, Apr 17, 2012	9.56	9.68	9.43	9.55
4978	NASDAQ	ATRO	Mon, Apr 16, 2012	9.46	9.64	9.37	9.50
4977	NASDAQ	ATRO	Fri, Apr 13, 2012	9.50	9.50	9.38	9.43
4976	NASDAQ	ATRO	Thu, Apr 12, 2012	9.38	9.71	9.38	9.54
4975	NASDAQ	ATRO	Wed, Apr 11, 2012	9.32	9.41	9.23	9.41
4974	NASDAQ	ATRO	Tue, Apr 10, 2012	9.68	9.78	9.13	9.20
4973	NASDAQ	ATRO	Mon, Apr 9, 2012	10.10	10.10	9.71	9.73
4972	NASDAQ	ATRO	Thu, Apr 5, 2012	10.50	10.65	10.24	10.28
4971	NASDAQ	ATRO	Wed, Apr 4, 2012	10.74	10.83	10.49	10.58
4970	NASDAQ	ATRO	Tue, Apr 3, 2012	11.10	11.10	10.82	10.90
4969	NASDAQ	ATRO	Mon, Apr 2, 2012	11.09	11.16	10.92	11.15
4968	NASDAQ	ATRO	Fri, Mar 30, 2012	11.21	11.26	11.01	11.08
4967	NASDAQ	ATRO	Thu, Mar 29, 2012	11.16	11.16	10.88	11.12
4966	NASDAQ	ATRO	Wed, Mar 28, 2012	11.42	11.42	11.10	11.21
4965	NASDAQ	ATRO	Tue, Mar 27, 2012	11.60	11.62	11.34	11.34
4964	NASDAQ	ATRO	Mon, Mar 26, 2012	11.14	11.68	11.14	11.59
4963	NASDAQ	ATRO	Fri, Mar 23, 2012	10.86	11.04	10.68	11.01
4962	NASDAQ	ATRO	Thu, Mar 22, 2012	10.79	10.91	10.66	10.90
4961	NASDAQ	ATRO	Wed, Mar 21, 2012	10.79	10.98	10.76	10.91
4960	NASDAQ	ATRO	Tue, Mar 20, 2012	10.77	10.88	10.77	10.78
4959	NASDAQ	ATRO	Mon, Mar 19, 2012	10.80	11.04	10.63	10.83
4958	NASDAQ	ATRO	Fri, Mar 16, 2012	10.96	10.99	10.77	10.82
4957	NASDAQ	ATRO	Thu, Mar 15, 2012	10.78	10.91	10.61	10.91
4956	NASDAQ	ATRO	Wed, Mar 14, 2012	10.79	10.91	10.68	10.73
4955	NASDAQ	ATRO	Tue, Mar 13, 2012	10.59	10.85	10.54	10.82
4954	NASDAQ	ATRO	Mon, Mar 12, 2012	10.59	10.72	10.58	10.60
4953	NASDAQ	ATRO	Fri, Mar 9, 2012	10.35	10.79	10.35	10.61
4952	NASDAQ	ATRO	Thu, Mar 8, 2012	10.33	10.43	10.23	10.36
4951	NASDAQ	ATRO	Wed, Mar 7, 2012	10.40	10.40	10.12	10.26
4950	NASDAQ	ATRO	Tue, Mar 6, 2012	10.30	10.43	10.30	10.35
4949	NASDAQ	ATRO	Mon, Mar 5, 2012	10.41	10.53	10.27	10.44
4948	NASDAQ	ATRO	Fri, Mar 2, 2012	10.44	10.60	9.85	10.46
4947	NASDAQ	ATRO	Thu, Mar 1, 2012	10.61	10.78	10.40	10.41
4946	NASDAQ	ATRO	Wed, Feb 29, 2012	10.94	10.94	10.51	10.59
4945	NASDAQ	ATRO	Tue, Feb 28, 2012	10.89	11.00	10.83	10.93
4944	NASDAQ	ATRO	Mon, Feb 27, 2012	10.95	11.00	10.77	10.87
4943	NASDAQ	ATRO	Fri, Feb 24, 2012	11.01	11.07	10.92	10.98
4942	NASDAQ	ATRO	Thu, Feb 23, 2012	10.58	11.09	10.48	10.96
4941	NASDAQ	ATRO	Wed, Feb 22, 2012	10.63	10.74	10.50	10.53
4940	NASDAQ	ATRO	Tue, Feb 21, 2012	11.13	11.13	10.54	10.68
4939	NASDAQ	ATRO	Fri, Feb 17, 2012	11.36	11.36	11.12	11.14
4938	NASDAQ	ATRO	Thu, Feb 16, 2012	11.30	11.36	11.15	11.29
4937	NASDAQ	ATRO	Wed, Feb 15, 2012	11.45	11.45	11.28	11.33
4936	NASDAQ	ATRO	Tue, Feb 14, 2012	11.38	11.40	11.24	11.39
4935	NASDAQ	ATRO	Mon, Feb 13, 2012	11.29	11.42	11.17	11.42
4934	NASDAQ	ATRO	Fri, Feb 10, 2012	11.18	11.37	11.10	11.17
4933	NASDAQ	ATRO	Thu, Feb 9, 2012	11.36	11.39	11.19	11.28
4932	NASDAQ	ATRO	Wed, Feb 8, 2012	10.92	11.34	10.87	11.30
4931	NASDAQ	ATRO	Tue, Feb 7, 2012	11.09	11.09	10.76	10.86
4930	NASDAQ	ATRO	Mon, Feb 6, 2012	11.41	11.62	10.97	11.11
4929	NASDAQ	ATRO	Fri, Feb 3, 2012	10.71	10.74	10.54	10.59
4928	NASDAQ	ATRO	Thu, Feb 2, 2012	10.73	10.82	10.46	10.49
4927	NASDAQ	ATRO	Wed, Feb 1, 2012	10.60	10.84	10.51	10.78
4926	NASDAQ	ATRO	Tue, Jan 31, 2012	10.64	10.64	10.42	10.59
4925	NASDAQ	ATRO	Mon, Jan 30, 2012	10.42	10.65	10.42	10.54
4924	NASDAQ	ATRO	Fri, Jan 27, 2012	10.30	10.58	10.30	10.55
4923	NASDAQ	ATRO	Thu, Jan 26, 2012	10.53	10.75	10.17	10.40
4922	NASDAQ	ATRO	Wed, Jan 25, 2012	10.21	10.58	10.14	10.47
4921	NASDAQ	ATRO	Tue, Jan 24, 2012	9.89	10.28	9.77	10.26
4920	NASDAQ	ATRO	Mon, Jan 23, 2012	10.16	10.19	9.92	9.94
4919	NASDAQ	ATRO	Fri, Jan 20, 2012	10.13	10.22	9.89	10.13
4918	NASDAQ	ATRO	Thu, Jan 19, 2012	10.36	10.41	10.08	10.29
4917	NASDAQ	ATRO	Wed, Jan 18, 2012	10.33	10.33	10.08	10.30
4916	NASDAQ	ATRO	Tue, Jan 17, 2012	10.58	10.65	10.35	10.38
4915	NASDAQ	ATRO	Fri, Jan 13, 2012	10.47	10.64	10.47	10.51
4914	NASDAQ	ATRO	Thu, Jan 12, 2012	10.70	10.71	10.52	10.61
4913	NASDAQ	ATRO	Wed, Jan 11, 2012	10.61	10.75	10.34	10.70
4912	NASDAQ	ATRO	Tue, Jan 10, 2012	10.74	10.77	10.61	10.67
4911	NASDAQ	ATRO	Mon, Jan 9, 2012	10.93	10.95	10.52	10.61
4910	NASDAQ	ATRO	Fri, Jan 6, 2012	10.90	11.04	10.75	10.85
4909	NASDAQ	ATRO	Thu, Jan 5, 2012	10.91	10.96	10.78	10.88
4908	NASDAQ	ATRO	Wed, Jan 4, 2012	11.03	11.17	10.91	10.98
4907	NASDAQ	ATRO	Tue, Jan 3, 2012	11.56	11.59	10.97	11.13
4906	NASDAQ	ATRO	Fri, Dec 30, 2011	11.46	11.53	11.32	11.35
4905	NASDAQ	ATRO	Thu, Dec 29, 2011	11.37	11.64	11.37	11.52
4904	NASDAQ	ATRO	Wed, Dec 28, 2011	11.66	11.66	11.31	11.37
4903	NASDAQ	ATRO	Tue, Dec 27, 2011	11.73	11.82	11.51	11.65
4902	NASDAQ	ATRO	Fri, Dec 23, 2011	11.82	11.84	11.59	11.82
4901	NASDAQ	ATRO	Thu, Dec 22, 2011	12.04	12.05	11.79	11.85
4900	NASDAQ	ATRO	Wed, Dec 21, 2011	11.79	12.04	11.51	11.99
4899	NASDAQ	ATRO	Tue, Dec 20, 2011	11.48	11.80	11.44	11.78
4898	NASDAQ	ATRO	Mon, Dec 19, 2011	11.42	11.45	11.17	11.21
4897	NASDAQ	ATRO	Fri, Dec 16, 2011	11.48	11.62	11.16	11.28
4896	NASDAQ	ATRO	Thu, Dec 15, 2011	11.46	11.46	11.14	11.36
4895	NASDAQ	ATRO	Wed, Dec 14, 2011	11.00	11.40	10.92	11.35
4894	NASDAQ	ATRO	Tue, Dec 13, 2011	11.43	11.54	11.07	11.10
4893	NASDAQ	ATRO	Mon, Dec 12, 2011	11.36	11.36	11.16	11.34
4892	NASDAQ	ATRO	Fri, Dec 9, 2011	10.91	11.61	10.88	11.55
4891	NASDAQ	ATRO	Thu, Dec 8, 2011	11.35	11.35	10.79	10.82
4890	NASDAQ	ATRO	Wed, Dec 7, 2011	11.47	11.55	11.22	11.47
4889	NASDAQ	ATRO	Tue, Dec 6, 2011	11.50	11.72	11.40	11.59
4888	NASDAQ	ATRO	Mon, Dec 5, 2011	11.31	11.68	11.29	11.50
4887	NASDAQ	ATRO	Fri, Dec 2, 2011	11.04	11.23	10.88	11.10
4886	NASDAQ	ATRO	Thu, Dec 1, 2011	11.30	11.38	10.84	10.85
4885	NASDAQ	ATRO	Wed, Nov 30, 2011	11.20	11.49	11.03	11.30
4884	NASDAQ	ATRO	Tue, Nov 29, 2011	10.72	10.90	10.58	10.84
4883	NASDAQ	ATRO	Mon, Nov 28, 2011	10.28	10.80	9.59	10.70
4882	NASDAQ	ATRO	Fri, Nov 25, 2011	10.13	10.28	9.86	9.92
4881	NASDAQ	ATRO	Wed, Nov 23, 2011	10.43	10.62	10.14	10.19
4880	NASDAQ	ATRO	Tue, Nov 22, 2011	10.74	10.76	10.36	10.52
4879	NASDAQ	ATRO	Mon, Nov 21, 2011	10.57	10.80	10.44	10.78
4878	NASDAQ	ATRO	Fri, Nov 18, 2011	10.40	10.80	10.35	10.80
4877	NASDAQ	ATRO	Thu, Nov 17, 2011	10.37	10.57	10.11	10.39
4876	NASDAQ	ATRO	Wed, Nov 16, 2011	10.39	11.02	10.34	10.38
4875	NASDAQ	ATRO	Tue, Nov 15, 2011	10.47	10.59	10.27	10.52
4874	NASDAQ	ATRO	Mon, Nov 14, 2011	10.12	10.54	10.12	10.44
4873	NASDAQ	ATRO	Fri, Nov 11, 2011	9.98	10.33	9.97	10.11
4872	NASDAQ	ATRO	Thu, Nov 10, 2011	10.16	10.16	9.86	9.98
4871	NASDAQ	ATRO	Wed, Nov 9, 2011	10.10	10.30	9.84	9.98
4870	NASDAQ	ATRO	Tue, Nov 8, 2011	10.34	10.44	10.07	10.40
4869	NASDAQ	ATRO	Mon, Nov 7, 2011	10.28	10.33	9.99	10.24
4868	NASDAQ	ATRO	Fri, Nov 4, 2011	10.10	10.33	9.89	10.28
4867	NASDAQ	ATRO	Thu, Nov 3, 2011	9.40	10.26	9.40	10.24
4866	NASDAQ	ATRO	Wed, Nov 2, 2011	9.43	9.76	9.25	9.74
4865	NASDAQ	ATRO	Tue, Nov 1, 2011	9.19	9.56	9.00	9.23
4864	NASDAQ	ATRO	Mon, Oct 31, 2011	9.62	9.78	9.51	9.63
4863	NASDAQ	ATRO	Fri, Oct 28, 2011	10.02	10.08	9.78	9.81
4862	NASDAQ	ATRO	Thu, Oct 27, 2011	10.02	10.14	9.74	10.06
4861	NASDAQ	ATRO	Wed, Oct 26, 2011	9.89	9.89	9.43	9.59
4860	NASDAQ	ATRO	Tue, Oct 25, 2011	9.93	10.11	9.60	9.70
4859	NASDAQ	ATRO	Mon, Oct 24, 2011	9.80	10.11	9.77	10.01
4858	NASDAQ	ATRO	Fri, Oct 21, 2011	9.75	9.93	9.54	9.90
4857	NASDAQ	ATRO	Thu, Oct 20, 2011	9.62	9.62	9.22	9.51
4856	NASDAQ	ATRO	Wed, Oct 19, 2011	10.15	10.15	9.53	9.56
4855	NASDAQ	ATRO	Tue, Oct 18, 2011	9.81	10.15	9.54	10.07
4854	NASDAQ	ATRO	Mon, Oct 17, 2011	10.34	10.43	9.65	9.74
4853	NASDAQ	ATRO	Fri, Oct 14, 2011	10.45	10.45	10.17	10.44
4852	NASDAQ	ATRO	Thu, Oct 13, 2011	10.11	10.36	10.07	10.31
4851	NASDAQ	ATRO	Wed, Oct 12, 2011	10.17	10.36	10.08	10.19
4850	NASDAQ	ATRO	Tue, Oct 11, 2011	9.93	10.42	9.90	10.23
4849	NASDAQ	ATRO	Mon, Oct 10, 2011	10.18	10.28	9.79	10.08
4848	NASDAQ	ATRO	Fri, Oct 7, 2011	10.21	10.45	10.08	10.20
4847	NASDAQ	ATRO	Thu, Oct 6, 2011	10.05	10.22	9.85	10.19
4846	NASDAQ	ATRO	Wed, Oct 5, 2011	9.86	10.13	9.65	10.06
4845	NASDAQ	ATRO	Tue, Oct 4, 2011	8.78	9.96	8.78	9.88
4844	NASDAQ	ATRO	Mon, Oct 3, 2011	8.86	9.28	8.82	8.84
4843	NASDAQ	ATRO	Fri, Sep 30, 2011	8.55	9.11	8.55	8.95
4842	NASDAQ	ATRO	Thu, Sep 29, 2011	8.86	8.96	8.29	8.70
4841	NASDAQ	ATRO	Wed, Sep 28, 2011	8.82	8.86	8.57	8.60
4840	NASDAQ	ATRO	Tue, Sep 27, 2011	9.25	9.32	8.84	8.92
4839	NASDAQ	ATRO	Mon, Sep 26, 2011	9.16	9.16	8.62	9.08
4838	NASDAQ	ATRO	Fri, Sep 23, 2011	8.93	9.24	8.91	9.08
4837	NASDAQ	ATRO	Thu, Sep 22, 2011	8.88	9.28	8.71	8.92
4836	NASDAQ	ATRO	Wed, Sep 21, 2011	9.49	9.61	9.15	9.19
4835	NASDAQ	ATRO	Tue, Sep 20, 2011	9.26	9.60	9.26	9.54
4834	NASDAQ	ATRO	Mon, Sep 19, 2011	9.19	9.38	9.03	9.25
4833	NASDAQ	ATRO	Fri, Sep 16, 2011	8.93	9.44	8.86	9.41
4832	NASDAQ	ATRO	Thu, Sep 15, 2011	8.90	8.90	8.64	8.85
4831	NASDAQ	ATRO	Wed, Sep 14, 2011	8.87	8.94	8.59	8.82
4830	NASDAQ	ATRO	Tue, Sep 13, 2011	9.13	9.21	8.78	8.86
4829	NASDAQ	ATRO	Mon, Sep 12, 2011	8.80	9.03	8.56	9.02
4828	NASDAQ	ATRO	Fri, Sep 9, 2011	9.13	9.22	8.83	8.98
4827	NASDAQ	ATRO	Thu, Sep 8, 2011	9.42	9.44	9.25	9.29
4826	NASDAQ	ATRO	Wed, Sep 7, 2011	9.18	9.51	9.11	9.49
4825	NASDAQ	ATRO	Tue, Sep 6, 2011	8.56	9.50	8.48	9.05
4824	NASDAQ	ATRO	Fri, Sep 2, 2011	8.95	9.14	8.90	8.98
4823	NASDAQ	ATRO	Thu, Sep 1, 2011	9.42	9.47	9.17	9.24
4822	NASDAQ	ATRO	Wed, Aug 31, 2011	9.38	9.51	9.10	9.45
4821	NASDAQ	ATRO	Tue, Aug 30, 2011	8.94	9.44	8.83	9.38
4820	NASDAQ	ATRO	Mon, Aug 29, 2011	8.68	9.01	8.68	9.00
4819	NASDAQ	ATRO	Fri, Aug 26, 2011	8.33	8.65	8.33	8.57
4818	NASDAQ	ATRO	Thu, Aug 25, 2011	8.87	9.02	8.38	8.43
4817	NASDAQ	ATRO	Wed, Aug 24, 2011	8.46	8.82	8.31	8.81
4816	NASDAQ	ATRO	Tue, Aug 23, 2011	7.71	8.45	7.62	8.43
4815	NASDAQ	ATRO	Mon, Aug 22, 2011	8.10	8.10	7.64	7.71
4814	NASDAQ	ATRO	Fri, Aug 19, 2011	7.71	8.16	7.71	7.90
4813	NASDAQ	ATRO	Thu, Aug 18, 2011	7.78	7.93	7.62	7.85
4812	NASDAQ	ATRO	Wed, Aug 17, 2011	8.14	8.30	7.86	8.07
4811	NASDAQ	ATRO	Tue, Aug 16, 2011	8.10	8.33	8.08	8.13
4810	NASDAQ	ATRO	Mon, Aug 15, 2011	8.48	8.55	8.11	8.35
4809	NASDAQ	ATRO	Fri, Aug 12, 2011	8.62	8.62	8.14	8.40
4808	NASDAQ	ATRO	Thu, Aug 11, 2011	8.35	8.48	8.16	8.33
4807	NASDAQ	ATRO	Wed, Aug 10, 2011	8.58	8.71	8.16	8.35
4806	NASDAQ	ATRO	Tue, Aug 9, 2011	8.46	8.93	8.34	8.78
4805	NASDAQ	ATRO	Mon, Aug 8, 2011	8.34	8.75	7.23	8.34
4804	NASDAQ	ATRO	Fri, Aug 5, 2011	9.05	9.05	8.35	8.96
4803	NASDAQ	ATRO	Thu, Aug 4, 2011	9.32	9.32	8.87	8.87
4802	NASDAQ	ATRO	Wed, Aug 3, 2011	8.76	9.48	8.52	9.45
4801	NASDAQ	ATRO	Tue, Aug 2, 2011	9.06	9.25	8.88	8.89
4800	NASDAQ	ATRO	Mon, Aug 1, 2011	9.39	9.39	9.04	9.15
4799	NASDAQ	ATRO	Fri, Jul 29, 2011	9.00	9.32	8.71	9.19
4798	NASDAQ	ATRO	Thu, Jul 28, 2011	9.09	9.36	8.91	9.24
4797	NASDAQ	ATRO	Wed, Jul 27, 2011	9.37	9.37	8.93	9.08
4796	NASDAQ	ATRO	Tue, Jul 26, 2011	9.72	9.72	9.50	9.50
4795	NASDAQ	ATRO	Mon, Jul 25, 2011	9.63	9.85	9.48	9.73
4794	NASDAQ	ATRO	Fri, Jul 22, 2011	9.73	9.78	9.53	9.76
4793	NASDAQ	ATRO	Thu, Jul 21, 2011	9.74	9.78	9.51	9.77
4792	NASDAQ	ATRO	Wed, Jul 20, 2011	9.77	9.77	9.51	9.61
4791	NASDAQ	ATRO	Tue, Jul 19, 2011	9.32	9.71	9.32	9.68
4790	NASDAQ	ATRO	Mon, Jul 18, 2011	9.22	9.24	9.06	9.20
4789	NASDAQ	ATRO	Fri, Jul 15, 2011	9.24	9.28	9.12	9.22
4788	NASDAQ	ATRO	Thu, Jul 14, 2011	9.37	9.42	9.19	9.20
4787	NASDAQ	ATRO	Wed, Jul 13, 2011	9.22	9.50	9.22	9.47
4786	NASDAQ	ATRO	Tue, Jul 12, 2011	9.07	9.20	9.06	9.10
4785	NASDAQ	ATRO	Mon, Jul 11, 2011	9.30	9.43	9.00	9.08
4784	NASDAQ	ATRO	Fri, Jul 8, 2011	9.42	9.51	9.29	9.48
4783	NASDAQ	ATRO	Thu, Jul 7, 2011	9.38	9.59	9.38	9.59
4782	NASDAQ	ATRO	Wed, Jul 6, 2011	9.32	9.37	8.82	9.29
4781	NASDAQ	ATRO	Tue, Jul 5, 2011	9.17	9.38	9.01	9.37
4780	NASDAQ	ATRO	Fri, Jul 1, 2011	8.89	9.22	8.40	9.15
4779	NASDAQ	ATRO	Thu, Jun 30, 2011	8.65	8.91	8.50	8.87
4778	NASDAQ	ATRO	Wed, Jun 29, 2011	8.64	8.81	8.39	8.74
4777	NASDAQ	ATRO	Tue, Jun 28, 2011	8.31	8.64	8.07	8.62
4776	NASDAQ	ATRO	Mon, Jun 27, 2011	8.06	8.26	8.04	8.25
4775	NASDAQ	ATRO	Fri, Jun 24, 2011	7.86	8.17	7.86	8.10
4774	NASDAQ	ATRO	Thu, Jun 23, 2011	7.30	7.91	7.24	7.86
4773	NASDAQ	ATRO	Wed, Jun 22, 2011	7.69	7.73	7.41	7.44
4772	NASDAQ	ATRO	Tue, Jun 21, 2011	7.86	7.90	7.73	7.76
4771	NASDAQ	ATRO	Mon, Jun 20, 2011	7.66	7.81	7.66	7.76
4770	NASDAQ	ATRO	Fri, Jun 17, 2011	7.77	7.81	7.68	7.69
4769	NASDAQ	ATRO	Thu, Jun 16, 2011	7.52	7.76	7.52	7.68
4768	NASDAQ	ATRO	Wed, Jun 15, 2011	7.19	7.55	7.19	7.51
4767	NASDAQ	ATRO	Tue, Jun 14, 2011	7.00	7.33	6.98	7.32
4766	NASDAQ	ATRO	Mon, Jun 13, 2011	6.92	7.02	6.74	6.88
4765	NASDAQ	ATRO	Fri, Jun 10, 2011	7.08	7.17	6.87	6.88
4764	NASDAQ	ATRO	Thu, Jun 9, 2011	6.99	7.18	6.99	7.17
4763	NASDAQ	ATRO	Wed, Jun 8, 2011	7.05	7.14	7.00	7.01
4762	NASDAQ	ATRO	Tue, Jun 7, 2011	7.20	7.26	7.10	7.11
4761	NASDAQ	ATRO	Mon, Jun 6, 2011	7.18	7.22	7.09	7.11
4760	NASDAQ	ATRO	Fri, Jun 3, 2011	7.12	7.24	6.97	7.20
4759	NASDAQ	ATRO	Thu, Jun 2, 2011	7.53	7.53	7.17	7.32
4758	NASDAQ	ATRO	Wed, Jun 1, 2011	7.72	7.92	7.49	7.49
4757	NASDAQ	ATRO	Tue, May 31, 2011	7.60	7.72	7.41	7.72
4756	NASDAQ	ATRO	Fri, May 27, 2011	7.68	7.74	7.48	7.48
4755	NASDAQ	ATRO	Thu, May 26, 2011	7.46	7.76	7.35	7.75
4754	NASDAQ	ATRO	Wed, May 25, 2011	7.37	7.68	7.37	7.51
4753	NASDAQ	ATRO	Tue, May 24, 2011	7.58	7.58	7.40	7.41
4752	NASDAQ	ATRO	Mon, May 23, 2011	7.49	7.78	7.49	7.58
4751	NASDAQ	ATRO	Fri, May 20, 2011	12.09	12.43	12.09	12.21
4750	NASDAQ	ATRO	Thu, May 19, 2011	12.02	12.29	11.87	12.19
4749	NASDAQ	ATRO	Wed, May 18, 2011	11.88	12.07	11.62	11.91
4748	NASDAQ	ATRO	Tue, May 17, 2011	11.87	12.07	11.79	11.87
4747	NASDAQ	ATRO	Mon, May 16, 2011	12.44	12.61	11.97	11.97
4746	NASDAQ	ATRO	Fri, May 13, 2011	12.69	12.71	12.53	12.54
4745	NASDAQ	ATRO	Thu, May 12, 2011	12.20	12.69	12.05	12.66
4744	NASDAQ	ATRO	Wed, May 11, 2011	12.55	12.78	12.24	12.36
4743	NASDAQ	ATRO	Tue, May 10, 2011	11.87	12.67	11.87	12.67
4742	NASDAQ	ATRO	Mon, May 9, 2011	11.57	11.87	11.46	11.84
4741	NASDAQ	ATRO	Fri, May 6, 2011	11.71	12.07	11.53	11.64
4740	NASDAQ	ATRO	Thu, May 5, 2011	11.36	11.75	10.88	11.51
4739	NASDAQ	ATRO	Wed, May 4, 2011	12.00	12.73	11.43	11.44
4738	NASDAQ	ATRO	Tue, May 3, 2011	11.22	11.41	10.79	10.89
4737	NASDAQ	ATRO	Mon, May 2, 2011	11.96	11.96	11.27	11.27
4736	NASDAQ	ATRO	Fri, Apr 29, 2011	11.33	11.97	11.29	11.87
4735	NASDAQ	ATRO	Thu, Apr 28, 2011	10.84	11.28	10.84	11.27
4734	NASDAQ	ATRO	Wed, Apr 27, 2011	11.01	11.08	10.51	10.92
4733	NASDAQ	ATRO	Tue, Apr 26, 2011	10.45	11.05	10.45	10.99
4732	NASDAQ	ATRO	Mon, Apr 25, 2011	10.41	10.47	10.28	10.37
4731	NASDAQ	ATRO	Thu, Apr 21, 2011	10.05	10.47	9.85	10.47
4730	NASDAQ	ATRO	Wed, Apr 20, 2011	10.16	10.16	9.67	10.04
4729	NASDAQ	ATRO	Tue, Apr 19, 2011	9.71	9.95	9.71	9.90
4728	NASDAQ	ATRO	Mon, Apr 18, 2011	9.99	9.99	9.66	9.68
4727	NASDAQ	ATRO	Fri, Apr 15, 2011	10.13	10.22	9.88	10.19
4726	NASDAQ	ATRO	Thu, Apr 14, 2011	9.79	10.19	9.65	10.15
4725	NASDAQ	ATRO	Wed, Apr 13, 2011	10.22	10.22	9.88	9.88
4724	NASDAQ	ATRO	Tue, Apr 12, 2011	10.10	10.27	9.78	10.10
4723	NASDAQ	ATRO	Mon, Apr 11, 2011	10.91	10.97	10.28	10.31
4722	NASDAQ	ATRO	Fri, Apr 8, 2011	11.43	11.43	10.93	10.93
4721	NASDAQ	ATRO	Thu, Apr 7, 2011	11.51	11.43	11.20	11.37
4720	NASDAQ	ATRO	Wed, Apr 6, 2011	11.64	11.64	11.44	11.51
4719	NASDAQ	ATRO	Tue, Apr 5, 2011	11.71	11.71	11.47	11.52
4718	NASDAQ	ATRO	Mon, Apr 4, 2011	11.70	11.72	11.53	11.59
4717	NASDAQ	ATRO	Fri, Apr 1, 2011	11.64	11.68	10.98	11.60
4716	NASDAQ	ATRO	Thu, Mar 31, 2011	11.43	11.55	11.27	11.49
4715	NASDAQ	ATRO	Wed, Mar 30, 2011	11.53	11.54	11.42	11.45
4714	NASDAQ	ATRO	Tue, Mar 29, 2011	11.18	11.46	11.04	11.46
4713	NASDAQ	ATRO	Mon, Mar 28, 2011	10.98	11.30	10.79	11.10
4712	NASDAQ	ATRO	Fri, Mar 25, 2011	10.92	11.10	10.90	10.94
4711	NASDAQ	ATRO	Thu, Mar 24, 2011	11.12	11.12	10.75	10.87
4710	NASDAQ	ATRO	Wed, Mar 23, 2011	11.01	11.08	10.88	11.00
4709	NASDAQ	ATRO	Tue, Mar 22, 2011	10.73	11.12	10.73	11.10
4708	NASDAQ	ATRO	Mon, Mar 21, 2011	9.80	10.64	9.50	10.64
4707	NASDAQ	ATRO	Fri, Mar 18, 2011	9.23	9.74	9.23	9.74
4706	NASDAQ	ATRO	Thu, Mar 17, 2011	9.13	9.31	9.09	9.13
4705	NASDAQ	ATRO	Wed, Mar 16, 2011	9.37	9.37	9.00	9.00
4704	NASDAQ	ATRO	Tue, Mar 15, 2011	9.52	9.55	9.36	9.37
4703	NASDAQ	ATRO	Mon, Mar 14, 2011	9.94	10.02	9.71	9.74
4702	NASDAQ	ATRO	Fri, Mar 11, 2011	10.10	10.25	10.05	10.11
4701	NASDAQ	ATRO	Thu, Mar 10, 2011	10.53	10.55	10.08	10.14
4700	NASDAQ	ATRO	Wed, Mar 9, 2011	10.24	10.78	10.22	10.70
4699	NASDAQ	ATRO	Tue, Mar 8, 2011	10.10	10.48	10.03	10.23
4698	NASDAQ	ATRO	Mon, Mar 7, 2011	10.65	10.65	10.19	10.29
4697	NASDAQ	ATRO	Fri, Mar 4, 2011	10.31	10.73	9.93	10.65
4696	NASDAQ	ATRO	Thu, Mar 3, 2011	9.91	10.27	9.89	10.27
4695	NASDAQ	ATRO	Wed, Mar 2, 2011	9.87	9.87	9.68	9.76
4694	NASDAQ	ATRO	Tue, Mar 1, 2011	9.86	9.95	9.64	9.74
4693	NASDAQ	ATRO	Mon, Feb 28, 2011	9.64	9.90	9.58	9.84
4692	NASDAQ	ATRO	Fri, Feb 25, 2011	9.26	9.61	9.24	9.54
4691	NASDAQ	ATRO	Thu, Feb 24, 2011	9.71	9.78	9.06	9.26
4690	NASDAQ	ATRO	Wed, Feb 23, 2011	9.91	10.02	9.71	9.84
4689	NASDAQ	ATRO	Tue, Feb 22, 2011	10.16	10.23	9.92	9.92
4688	NASDAQ	ATRO	Fri, Feb 18, 2011	10.23	10.40	10.06	10.23
4687	NASDAQ	ATRO	Thu, Feb 17, 2011	10.14	10.31	9.96	10.16
4686	NASDAQ	ATRO	Wed, Feb 16, 2011	10.58	10.63	10.03	10.21
4685	NASDAQ	ATRO	Tue, Feb 15, 2011	10.71	10.77	10.46	10.55
4684	NASDAQ	ATRO	Mon, Feb 14, 2011	10.28	10.70	10.28	10.57
4683	NASDAQ	ATRO	Fri, Feb 11, 2011	10.06	10.27	9.83	10.14
4682	NASDAQ	ATRO	Thu, Feb 10, 2011	10.40	10.90	9.92	10.16
4681	NASDAQ	ATRO	Wed, Feb 9, 2011	11.61	11.61	10.69	10.72
4680	NASDAQ	ATRO	Tue, Feb 8, 2011	11.79	12.15	11.47	11.61
4679	NASDAQ	ATRO	Mon, Feb 7, 2011	10.95	11.14	10.94	11.11
4678	NASDAQ	ATRO	Fri, Feb 4, 2011	10.97	11.03	10.92	10.99
4677	NASDAQ	ATRO	Thu, Feb 3, 2011	10.82	11.00	10.82	11.00
4676	NASDAQ	ATRO	Wed, Feb 2, 2011	10.92	11.07	10.92	10.93
4675	NASDAQ	ATRO	Tue, Feb 1, 2011	10.57	11.01	10.52	10.96
4674	NASDAQ	ATRO	Mon, Jan 31, 2011	10.33	10.77	10.25	10.55
4673	NASDAQ	ATRO	Fri, Jan 28, 2011	10.50	10.52	10.10	10.28
4672	NASDAQ	ATRO	Thu, Jan 27, 2011	10.20	10.61	9.98	10.52
4671	NASDAQ	ATRO	Wed, Jan 26, 2011	9.89	10.24	9.83	10.21
4670	NASDAQ	ATRO	Tue, Jan 25, 2011	9.70	9.85	9.53	9.83
4669	NASDAQ	ATRO	Mon, Jan 24, 2011	9.36	10.00	9.09	9.81
4668	NASDAQ	ATRO	Fri, Jan 21, 2011	9.79	9.96	9.30	9.31
4667	NASDAQ	ATRO	Thu, Jan 20, 2011	10.26	10.34	9.59	9.73
4666	NASDAQ	ATRO	Wed, Jan 19, 2011	10.72	10.80	10.35	10.35
4665	NASDAQ	ATRO	Tue, Jan 18, 2011	10.58	10.84	10.51	10.76
4664	NASDAQ	ATRO	Fri, Jan 14, 2011	10.51	10.61	10.34	10.58
4663	NASDAQ	ATRO	Thu, Jan 13, 2011	10.52	10.54	10.47	10.51
4662	NASDAQ	ATRO	Wed, Jan 12, 2011	10.59	10.59	10.48	10.55
4661	NASDAQ	ATRO	Tue, Jan 11, 2011	10.47	10.56	10.44	10.54
4660	NASDAQ	ATRO	Mon, Jan 10, 2011	10.27	10.47	10.27	10.46
4659	NASDAQ	ATRO	Fri, Jan 7, 2011	10.26	10.37	10.22	10.37
4658	NASDAQ	ATRO	Thu, Jan 6, 2011	10.16	10.33	10.16	10.27
4657	NASDAQ	ATRO	Wed, Jan 5, 2011	9.80	10.21	9.80	10.21
4656	NASDAQ	ATRO	Tue, Jan 4, 2011	10.13	10.13	9.77	9.77
4655	NASDAQ	ATRO	Mon, Jan 3, 2011	9.68	10.10	9.63	10.05
4654	NASDAQ	ATRO	Fri, Dec 31, 2010	9.59	9.68	9.26	9.59
4653	NASDAQ	ATRO	Thu, Dec 30, 2010	9.77	9.77	9.65	9.66
4652	NASDAQ	ATRO	Wed, Dec 29, 2010	10.01	10.01	9.73	9.85
4651	NASDAQ	ATRO	Tue, Dec 28, 2010	10.05	10.05	9.89	10.01
4650	NASDAQ	ATRO	Mon, Dec 27, 2010	10.10	10.18	9.64	10.11
4649	NASDAQ	ATRO	Thu, Dec 23, 2010	10.23	10.23	10.05	10.15
4648	NASDAQ	ATRO	Wed, Dec 22, 2010	10.40	10.40	10.06	10.26
4647	NASDAQ	ATRO	Tue, Dec 21, 2010	10.46	10.50	10.05	10.45
4646	NASDAQ	ATRO	Mon, Dec 20, 2010	10.15	10.42	10.15	10.36
4645	NASDAQ	ATRO	Fri, Dec 17, 2010	10.34	10.41	9.95	10.15
4644	NASDAQ	ATRO	Thu, Dec 16, 2010	10.37	10.37	9.71	10.33
4643	NASDAQ	ATRO	Wed, Dec 15, 2010	10.37	10.48	10.26	10.37
4642	NASDAQ	ATRO	Tue, Dec 14, 2010	10.31	10.39	10.19	10.37
4641	NASDAQ	ATRO	Mon, Dec 13, 2010	10.42	10.44	10.26	10.31
4640	NASDAQ	ATRO	Fri, Dec 10, 2010	10.16	10.35	10.07	10.32
4639	NASDAQ	ATRO	Thu, Dec 9, 2010	10.10	10.23	10.05	10.16
4638	NASDAQ	ATRO	Wed, Dec 8, 2010	9.94	10.07	9.89	10.05
4637	NASDAQ	ATRO	Tue, Dec 7, 2010	9.92	10.09	9.82	9.88
4636	NASDAQ	ATRO	Mon, Dec 6, 2010	9.70	9.80	9.68	9.78
4635	NASDAQ	ATRO	Fri, Dec 3, 2010	9.71	9.75	9.56	9.70
4634	NASDAQ	ATRO	Thu, Dec 2, 2010	9.49	9.80	9.21	9.71
4633	NASDAQ	ATRO	Wed, Dec 1, 2010	9.59	9.75	9.31	9.53
4632	NASDAQ	ATRO	Tue, Nov 30, 2010	9.16	9.43	9.10	9.41
4631	NASDAQ	ATRO	Mon, Nov 29, 2010	9.09	9.33	8.93	9.30
4630	NASDAQ	ATRO	Fri, Nov 26, 2010	9.04	9.18	8.96	9.11
4629	NASDAQ	ATRO	Wed, Nov 24, 2010	9.18	9.21	8.99	9.13
4628	NASDAQ	ATRO	Tue, Nov 23, 2010	9.08	9.20	8.92	9.08
4627	NASDAQ	ATRO	Mon, Nov 22, 2010	9.24	9.29	9.09	9.23
4626	NASDAQ	ATRO	Fri, Nov 19, 2010	9.20	9.54	9.20	9.31
4625	NASDAQ	ATRO	Thu, Nov 18, 2010	8.93	9.26	8.78	9.26
4624	NASDAQ	ATRO	Wed, Nov 17, 2010	9.04	9.20	8.73	8.81
4623	NASDAQ	ATRO	Tue, Nov 16, 2010	9.13	9.13	8.61	8.96
4622	NASDAQ	ATRO	Mon, Nov 15, 2010	9.43	9.63	9.04	9.18
4621	NASDAQ	ATRO	Fri, Nov 12, 2010	9.79	9.79	9.40	9.41
4620	NASDAQ	ATRO	Thu, Nov 11, 2010	10.13	10.13	9.80	9.89
4619	NASDAQ	ATRO	Wed, Nov 10, 2010	10.45	10.45	10.12	10.28
4618	NASDAQ	ATRO	Tue, Nov 9, 2010	10.50	10.57	10.33	10.46
4617	NASDAQ	ATRO	Mon, Nov 8, 2010	10.46	10.50	10.23	10.47
4616	NASDAQ	ATRO	Fri, Nov 5, 2010	10.47	10.74	10.46	10.52
4615	NASDAQ	ATRO	Thu, Nov 4, 2010	10.29	10.52	10.20	10.46
4614	NASDAQ	ATRO	Wed, Nov 3, 2010	9.80	10.09	9.80	9.86
4613	NASDAQ	ATRO	Tue, Nov 2, 2010	9.59	9.88	9.14	9.77
4612	NASDAQ	ATRO	Mon, Nov 1, 2010	9.59	9.59	9.05	9.38
4611	NASDAQ	ATRO	Fri, Oct 29, 2010	9.30	9.57	9.30	9.52
4610	NASDAQ	ATRO	Thu, Oct 28, 2010	9.46	9.46	9.25	9.32
4609	NASDAQ	ATRO	Wed, Oct 27, 2010	9.24	9.40	9.05	9.37
4608	NASDAQ	ATRO	Tue, Oct 26, 2010	9.23	9.43	9.21	9.34
4607	NASDAQ	ATRO	Mon, Oct 25, 2010	9.33	9.34	9.16	9.32
4606	NASDAQ	ATRO	Fri, Oct 22, 2010	9.31	9.31	8.78	9.22
4605	NASDAQ	ATRO	Thu, Oct 21, 2010	9.61	9.69	9.21	9.31
4604	NASDAQ	ATRO	Wed, Oct 20, 2010	9.66	9.74	9.49	9.53
4603	NASDAQ	ATRO	Tue, Oct 19, 2010	9.25	9.62	9.21	9.59
4602	NASDAQ	ATRO	Mon, Oct 18, 2010	9.16	9.43	9.01	9.39
4601	NASDAQ	ATRO	Fri, Oct 15, 2010	9.24	9.24	9.05	9.11
4600	NASDAQ	ATRO	Thu, Oct 14, 2010	8.97	9.21	8.74	9.13
4599	NASDAQ	ATRO	Wed, Oct 13, 2010	8.67	9.04	8.55	9.01
4598	NASDAQ	ATRO	Tue, Oct 12, 2010	8.56	8.71	8.55	8.64
4597	NASDAQ	ATRO	Mon, Oct 11, 2010	8.61	8.69	8.52	8.63
4596	NASDAQ	ATRO	Fri, Oct 8, 2010	8.36	8.70	8.27	8.63
4595	NASDAQ	ATRO	Thu, Oct 7, 2010	8.67	8.68	8.32	8.46
4594	NASDAQ	ATRO	Wed, Oct 6, 2010	8.72	8.76	8.36	8.58
4593	NASDAQ	ATRO	Tue, Oct 5, 2010	8.11	8.79	8.02	8.77
4592	NASDAQ	ATRO	Mon, Oct 4, 2010	8.07	8.23	7.91	8.00
4591	NASDAQ	ATRO	Fri, Oct 1, 2010	8.05	8.15	7.73	8.13
4590	NASDAQ	ATRO	Thu, Sep 30, 2010	8.06	8.06	7.73	7.97
4589	NASDAQ	ATRO	Wed, Sep 29, 2010	7.90	8.01	7.80	7.96
4588	NASDAQ	ATRO	Tue, Sep 28, 2010	7.94	7.95	7.69	7.95
4587	NASDAQ	ATRO	Mon, Sep 27, 2010	8.07	8.07	7.84	7.92
4586	NASDAQ	ATRO	Fri, Sep 24, 2010	7.87	8.09	7.75	8.09
4585	NASDAQ	ATRO	Thu, Sep 23, 2010	7.74	7.81	7.66	7.73
4584	NASDAQ	ATRO	Wed, Sep 22, 2010	7.76	7.86	7.70	7.83
4583	NASDAQ	ATRO	Tue, Sep 21, 2010	7.81	7.84	7.69	7.77
4582	NASDAQ	ATRO	Mon, Sep 20, 2010	7.83	7.97	7.69	7.80
4581	NASDAQ	ATRO	Fri, Sep 17, 2010	7.65	7.78	7.51	7.77
4580	NASDAQ	ATRO	Thu, Sep 16, 2010	7.57	7.60	7.52	7.53
4579	NASDAQ	ATRO	Wed, Sep 15, 2010	7.53	7.63	7.31	7.62
4578	NASDAQ	ATRO	Tue, Sep 14, 2010	7.61	7.64	7.39	7.55
4577	NASDAQ	ATRO	Mon, Sep 13, 2010	7.57	7.65	7.19	7.62
4576	NASDAQ	ATRO	Fri, Sep 10, 2010	7.20	7.59	7.12	7.54
4575	NASDAQ	ATRO	Thu, Sep 9, 2010	7.10	7.23	6.92	7.19
4574	NASDAQ	ATRO	Wed, Sep 8, 2010	7.39	7.58	6.87	7.00
4573	NASDAQ	ATRO	Tue, Sep 7, 2010	7.31	7.48	7.06	7.35
4572	NASDAQ	ATRO	Fri, Sep 3, 2010	6.98	7.63	6.72	7.60
4571	NASDAQ	ATRO	Thu, Sep 2, 2010	7.18	7.18	6.77	6.91
4570	NASDAQ	ATRO	Wed, Sep 1, 2010	6.88	7.23	6.81	7.23
4569	NASDAQ	ATRO	Tue, Aug 31, 2010	6.62	6.80	6.52	6.75
4568	NASDAQ	ATRO	Mon, Aug 30, 2010	6.72	6.74	6.41	6.60
4567	NASDAQ	ATRO	Fri, Aug 27, 2010	6.51	6.81	6.49	6.77
4566	NASDAQ	ATRO	Thu, Aug 26, 2010	6.73	6.92	6.40	6.41
4565	NASDAQ	ATRO	Wed, Aug 25, 2010	6.18	6.78	6.18	6.73
4564	NASDAQ	ATRO	Tue, Aug 24, 2010	6.41	6.56	6.17	6.19
4563	NASDAQ	ATRO	Mon, Aug 23, 2010	6.84	6.87	6.42	6.43
4562	NASDAQ	ATRO	Fri, Aug 20, 2010	6.86	6.89	6.64	6.77
4561	NASDAQ	ATRO	Thu, Aug 19, 2010	7.24	7.27	6.76	6.93
4560	NASDAQ	ATRO	Wed, Aug 18, 2010	7.56	7.56	7.23	7.31
4559	NASDAQ	ATRO	Tue, Aug 17, 2010	7.41	7.76	7.39	7.60
4558	NASDAQ	ATRO	Mon, Aug 16, 2010	7.37	7.53	7.23	7.30
4557	NASDAQ	ATRO	Fri, Aug 13, 2010	7.45	7.60	7.44	7.44
4556	NASDAQ	ATRO	Thu, Aug 12, 2010	7.47	7.78	7.45	7.48
4555	NASDAQ	ATRO	Wed, Aug 11, 2010	7.89	7.92	7.60	7.62
4554	NASDAQ	ATRO	Tue, Aug 10, 2010	8.10	8.31	7.93	8.03
4553	NASDAQ	ATRO	Mon, Aug 9, 2010	7.96	8.33	7.95	8.22
4552	NASDAQ	ATRO	Fri, Aug 6, 2010	8.01	8.07	7.83	7.87
4551	NASDAQ	ATRO	Thu, Aug 5, 2010	7.84	8.10	7.62	8.00
4550	NASDAQ	ATRO	Wed, Aug 4, 2010	7.62	8.06	7.50	8.06
4549	NASDAQ	ATRO	Tue, Aug 3, 2010	7.47	7.69	7.46	7.54
4548	NASDAQ	ATRO	Mon, Aug 2, 2010	7.41	7.54	7.31	7.48
4547	NASDAQ	ATRO	Fri, Jul 30, 2010	6.89	7.34	6.89	7.31
4546	NASDAQ	ATRO	Thu, Jul 29, 2010	7.19	7.30	6.98	7.15
4545	NASDAQ	ATRO	Wed, Jul 28, 2010	7.36	7.50	7.13	7.14
4544	NASDAQ	ATRO	Tue, Jul 27, 2010	7.54	7.68	7.35	7.35
4543	NASDAQ	ATRO	Mon, Jul 26, 2010	7.05	7.53	6.75	7.47
4542	NASDAQ	ATRO	Fri, Jul 23, 2010	6.55	7.10	6.44	7.00
4541	NASDAQ	ATRO	Thu, Jul 22, 2010	6.44	6.61	6.40	6.59
4540	NASDAQ	ATRO	Wed, Jul 21, 2010	6.42	6.58	6.28	6.33
4539	NASDAQ	ATRO	Tue, Jul 20, 2010	6.21	6.42	6.02	6.40
4538	NASDAQ	ATRO	Mon, Jul 19, 2010	6.80	6.87	6.19	6.30
4537	NASDAQ	ATRO	Fri, Jul 16, 2010	7.22	7.22	6.71	6.76
4536	NASDAQ	ATRO	Thu, Jul 15, 2010	7.45	7.52	7.20	7.31
4535	NASDAQ	ATRO	Wed, Jul 14, 2010	7.39	7.47	7.35	7.43
4534	NASDAQ	ATRO	Tue, Jul 13, 2010	7.42	7.47	7.36	7.44
4533	NASDAQ	ATRO	Mon, Jul 12, 2010	7.46	7.46	7.29	7.29
4532	NASDAQ	ATRO	Fri, Jul 9, 2010	7.52	7.52	7.31	7.46
4531	NASDAQ	ATRO	Thu, Jul 8, 2010	7.41	7.52	7.39	7.44
4530	NASDAQ	ATRO	Wed, Jul 7, 2010	7.23	7.38	7.05	7.32
4529	NASDAQ	ATRO	Tue, Jul 6, 2010	7.47	7.60	7.15	7.18
4528	NASDAQ	ATRO	Fri, Jul 2, 2010	7.21	8.06	7.21	7.40
4527	NASDAQ	ATRO	Thu, Jul 1, 2010	7.37	7.39	7.01	7.14
4526	NASDAQ	ATRO	Wed, Jun 30, 2010	7.82	8.15	7.45	7.47
4525	NASDAQ	ATRO	Tue, Jun 29, 2010	8.03	8.13	7.51	7.84
4524	NASDAQ	ATRO	Mon, Jun 28, 2010	8.06	8.15	7.89	8.03
4523	NASDAQ	ATRO	Fri, Jun 25, 2010	7.62	8.21	7.58	8.17
4522	NASDAQ	ATRO	Thu, Jun 24, 2010	7.71	7.71	7.50	7.60
4521	NASDAQ	ATRO	Wed, Jun 23, 2010	7.66	7.84	7.43	7.74
4520	NASDAQ	ATRO	Tue, Jun 22, 2010	7.91	7.95	7.69	7.69
4519	NASDAQ	ATRO	Mon, Jun 21, 2010	8.25	8.31	7.85	7.86
4518	NASDAQ	ATRO	Fri, Jun 18, 2010	7.89	8.18	7.89	8.17
4517	NASDAQ	ATRO	Thu, Jun 17, 2010	7.68	7.86	7.68	7.83
4516	NASDAQ	ATRO	Wed, Jun 16, 2010	7.67	7.87	7.51	7.69
4515	NASDAQ	ATRO	Tue, Jun 15, 2010	7.44	7.76	7.32	7.76
4514	NASDAQ	ATRO	Mon, Jun 14, 2010	7.33	7.66	7.33	7.49
4513	NASDAQ	ATRO	Fri, Jun 11, 2010	7.10	7.29	7.10	7.28
4512	NASDAQ	ATRO	Thu, Jun 10, 2010	7.10	7.22	6.97	7.16
4511	NASDAQ	ATRO	Wed, Jun 9, 2010	7.10	7.25	6.90	7.00
4510	NASDAQ	ATRO	Tue, Jun 8, 2010	7.43	7.43	6.88	7.01
4509	NASDAQ	ATRO	Mon, Jun 7, 2010	7.46	7.83	7.32	7.39
4508	NASDAQ	ATRO	Fri, Jun 4, 2010	7.69	7.70	7.38	7.40
4507	NASDAQ	ATRO	Thu, Jun 3, 2010	8.03	8.18	7.61	7.80
4506	NASDAQ	ATRO	Wed, Jun 2, 2010	7.48	8.20	7.37	8.12
4505	NASDAQ	ATRO	Tue, Jun 1, 2010	7.70	7.88	7.39	7.47
4504	NASDAQ	ATRO	Fri, May 28, 2010	7.59	7.90	7.49	7.73
4503	NASDAQ	ATRO	Thu, May 27, 2010	7.28	7.65	7.17	7.63
4502	NASDAQ	ATRO	Wed, May 26, 2010	7.34	7.45	7.09	7.11
4501	NASDAQ	ATRO	Tue, May 25, 2010	6.97	7.30	6.97	7.26
4500	NASDAQ	ATRO	Mon, May 24, 2010	7.22	7.31	7.08	7.30
4499	NASDAQ	ATRO	Fri, May 21, 2010	7.11	7.33	7.05	7.24
4498	NASDAQ	ATRO	Thu, May 20, 2010	7.57	7.57	7.10	7.20
4497	NASDAQ	ATRO	Wed, May 19, 2010	7.63	7.86	7.42	7.68
4496	NASDAQ	ATRO	Tue, May 18, 2010	7.76	7.76	7.52	7.66
4495	NASDAQ	ATRO	Mon, May 17, 2010	7.99	8.08	7.69	7.69
4494	NASDAQ	ATRO	Fri, May 14, 2010	7.82	7.98	7.78	7.93
4493	NASDAQ	ATRO	Thu, May 13, 2010	8.16	8.30	7.77	7.92
4492	NASDAQ	ATRO	Wed, May 12, 2010	7.86	8.22	7.72	8.10
4491	NASDAQ	ATRO	Tue, May 11, 2010	7.64	8.05	7.63	7.87
4490	NASDAQ	ATRO	Mon, May 10, 2010	7.16	7.65	7.05	7.62
4489	NASDAQ	ATRO	Fri, May 7, 2010	7.42	7.70	7.09	7.10
4488	NASDAQ	ATRO	Thu, May 6, 2010	7.00	7.75	7.00	7.42
4487	NASDAQ	ATRO	Wed, May 5, 2010	6.60	7.23	6.56	7.06
4486	NASDAQ	ATRO	Tue, May 4, 2010	6.59	6.62	6.38	6.54
4485	NASDAQ	ATRO	Mon, May 3, 2010	6.60	6.69	6.51	6.64
4484	NASDAQ	ATRO	Fri, Apr 30, 2010	6.56	6.68	6.42	6.60
4483	NASDAQ	ATRO	Thu, Apr 29, 2010	6.48	6.60	6.30	6.59
4482	NASDAQ	ATRO	Wed, Apr 28, 2010	6.21	6.45	6.16	6.42
4481	NASDAQ	ATRO	Tue, Apr 27, 2010	6.38	6.38	6.19	6.29
4480	NASDAQ	ATRO	Mon, Apr 26, 2010	6.32	6.43	6.29	6.39
4479	NASDAQ	ATRO	Fri, Apr 23, 2010	6.16	6.30	6.05	6.30
4478	NASDAQ	ATRO	Thu, Apr 22, 2010	6.17	6.19	6.07	6.18
4477	NASDAQ	ATRO	Wed, Apr 21, 2010	6.12	6.25	5.98	6.23
4476	NASDAQ	ATRO	Tue, Apr 20, 2010	5.79	6.10	5.75	6.10
4475	NASDAQ	ATRO	Mon, Apr 19, 2010	5.75	5.82	5.67	5.76
4474	NASDAQ	ATRO	Fri, Apr 16, 2010	5.80	5.88	5.71	5.77
4473	NASDAQ	ATRO	Thu, Apr 15, 2010	5.76	5.83	5.71	5.80
4472	NASDAQ	ATRO	Wed, Apr 14, 2010	5.78	5.79	5.58	5.76
4471	NASDAQ	ATRO	Tue, Apr 13, 2010	5.77	5.83	5.65	5.77
4470	NASDAQ	ATRO	Mon, Apr 12, 2010	5.89	5.89	5.64	5.76
4469	NASDAQ	ATRO	Fri, Apr 9, 2010	5.68	5.88	5.58	5.81
4468	NASDAQ	ATRO	Thu, Apr 8, 2010	5.75	5.89	5.58	5.88
4467	NASDAQ	ATRO	Wed, Apr 7, 2010	5.28	5.89	5.28	5.84
4466	NASDAQ	ATRO	Tue, Apr 6, 2010	4.66	5.32	4.61	5.27
4465	NASDAQ	ATRO	Mon, Apr 5, 2010	4.53	4.69	4.48	4.69
4464	NASDAQ	ATRO	Thu, Apr 1, 2010	4.47	4.62	4.46	4.59
4463	NASDAQ	ATRO	Wed, Mar 31, 2010	4.43	4.49	4.43	4.48
4462	NASDAQ	ATRO	Tue, Mar 30, 2010	4.45	4.55	4.44	4.45
4461	NASDAQ	ATRO	Mon, Mar 29, 2010	4.44	4.47	4.36	4.45
4460	NASDAQ	ATRO	Fri, Mar 26, 2010	4.38	4.44	4.36	4.43
4459	NASDAQ	ATRO	Thu, Mar 25, 2010	4.38	4.48	4.36	4.36
4458	NASDAQ	ATRO	Wed, Mar 24, 2010	4.51	4.51	4.39	4.39
4457	NASDAQ	ATRO	Tue, Mar 23, 2010	4.47	4.55	4.37	4.52
4456	NASDAQ	ATRO	Mon, Mar 22, 2010	4.26	4.49	4.22	4.47
4455	NASDAQ	ATRO	Fri, Mar 19, 2010	4.28	4.31	4.03	4.29
4454	NASDAQ	ATRO	Thu, Mar 18, 2010	4.01	4.32	4.01	4.26
4453	NASDAQ	ATRO	Wed, Mar 17, 2010	4.37	4.37	4.21	4.29
4452	NASDAQ	ATRO	Tue, Mar 16, 2010	4.29	4.46	4.27	4.35
4451	NASDAQ	ATRO	Mon, Mar 15, 2010	4.30	4.34	4.28	4.33
4450	NASDAQ	ATRO	Fri, Mar 12, 2010	4.29	4.34	4.24	4.32
4449	NASDAQ	ATRO	Thu, Mar 11, 2010	4.19	4.29	4.11	4.28
4448	NASDAQ	ATRO	Wed, Mar 10, 2010	4.20	4.22	4.09	4.22
4447	NASDAQ	ATRO	Tue, Mar 9, 2010	4.00	4.21	4.00	4.21
4446	NASDAQ	ATRO	Mon, Mar 8, 2010	4.20	4.21	4.13	4.19
4445	NASDAQ	ATRO	Fri, Mar 5, 2010	4.06	4.22	3.96	4.21
4444	NASDAQ	ATRO	Thu, Mar 4, 2010	3.98	4.06	3.93	4.06
4443	NASDAQ	ATRO	Wed, Mar 3, 2010	4.04	4.04	3.98	4.03
4442	NASDAQ	ATRO	Tue, Mar 2, 2010	4.03	4.04	3.79	4.03
4441	NASDAQ	ATRO	Mon, Mar 1, 2010	4.03	4.11	3.79	4.06
4440	NASDAQ	ATRO	Fri, Feb 26, 2010	3.85	4.03	3.82	4.00
4439	NASDAQ	ATRO	Thu, Feb 25, 2010	3.74	3.97	3.62	3.84
4438	NASDAQ	ATRO	Wed, Feb 24, 2010	3.76	3.95	3.76	3.80
4437	NASDAQ	ATRO	Tue, Feb 23, 2010	3.81	4.04	3.69	3.99
4436	NASDAQ	ATRO	Mon, Feb 22, 2010	3.79	3.83	3.74	3.77
4435	NASDAQ	ATRO	Fri, Feb 19, 2010	3.83	3.87	3.74	3.78
4434	NASDAQ	ATRO	Thu, Feb 18, 2010	3.78	3.84	3.76	3.84
4433	NASDAQ	ATRO	Wed, Feb 17, 2010	3.72	3.76	3.68	3.74
4432	NASDAQ	ATRO	Tue, Feb 16, 2010	3.77	3.85	3.68	3.70
4431	NASDAQ	ATRO	Fri, Feb 12, 2010	3.70	3.77	3.53	3.74
4430	NASDAQ	ATRO	Thu, Feb 11, 2010	3.57	3.71	3.47	3.69
4429	NASDAQ	ATRO	Wed, Feb 10, 2010	3.64	3.70	3.55	3.58
4428	NASDAQ	ATRO	Tue, Feb 9, 2010	3.53	3.71	3.47	3.66
4427	NASDAQ	ATRO	Mon, Feb 8, 2010	3.46	3.58	3.41	3.45
4426	NASDAQ	ATRO	Fri, Feb 5, 2010	3.39	3.47	3.34	3.47
4425	NASDAQ	ATRO	Thu, Feb 4, 2010	3.52	3.65	3.36	3.39
4424	NASDAQ	ATRO	Wed, Feb 3, 2010	3.66	3.69	3.47	3.54
4423	NASDAQ	ATRO	Tue, Feb 2, 2010	3.85	3.85	3.68	3.68
4422	NASDAQ	ATRO	Mon, Feb 1, 2010	3.69	3.90	3.57	3.87
4421	NASDAQ	ATRO	Fri, Jan 29, 2010	3.69	3.70	3.41	3.70
4420	NASDAQ	ATRO	Thu, Jan 28, 2010	3.44	3.68	3.44	3.65
4419	NASDAQ	ATRO	Wed, Jan 27, 2010	3.40	3.71	3.40	3.51
4418	NASDAQ	ATRO	Tue, Jan 26, 2010	3.42	3.49	3.30	3.43
4417	NASDAQ	ATRO	Mon, Jan 25, 2010	3.63	3.63	3.36	3.44
4416	NASDAQ	ATRO	Fri, Jan 22, 2010	3.45	3.62	3.41	3.45
4415	NASDAQ	ATRO	Thu, Jan 21, 2010	3.54	3.58	3.43	3.44
4414	NASDAQ	ATRO	Wed, Jan 20, 2010	3.42	3.64	3.25	3.61
4413	NASDAQ	ATRO	Tue, Jan 19, 2010	3.81	3.81	3.59	3.64
4412	NASDAQ	ATRO	Fri, Jan 15, 2010	3.89	3.89	3.68	3.71
4411	NASDAQ	ATRO	Thu, Jan 14, 2010	4.01	4.05	3.82	3.86
4410	NASDAQ	ATRO	Wed, Jan 13, 2010	4.02	4.08	4.00	4.01
4409	NASDAQ	ATRO	Tue, Jan 12, 2010	3.97	4.08	3.97	4.00
4408	NASDAQ	ATRO	Mon, Jan 11, 2010	4.06	4.06	3.98	4.00
4407	NASDAQ	ATRO	Fri, Jan 8, 2010	3.99	4.07	3.99	4.04
4406	NASDAQ	ATRO	Thu, Jan 7, 2010	4.04	4.07	3.98	4.01
4405	NASDAQ	ATRO	Wed, Jan 6, 2010	4.08	4.22	3.95	3.98
4404	NASDAQ	ATRO	Tue, Jan 5, 2010	4.22	4.23	4.08	4.10
4403	NASDAQ	ATRO	Mon, Jan 4, 2010	3.94	4.22	3.94	4.22
4402	NASDAQ	ATRO	Thu, Dec 31, 2009	3.88	3.99	3.84	3.90
4401	NASDAQ	ATRO	Wed, Dec 30, 2009	3.87	3.92	3.79	3.88
4400	NASDAQ	ATRO	Tue, Dec 29, 2009	4.03	4.05	3.85	3.87
4399	NASDAQ	ATRO	Mon, Dec 28, 2009	4.12	4.12	3.76	4.01
4398	NASDAQ	ATRO	Thu, Dec 24, 2009	3.94	4.11	3.63	4.11
4397	NASDAQ	ATRO	Wed, Dec 23, 2009	4.10	4.22	4.02	4.02
4396	NASDAQ	ATRO	Tue, Dec 22, 2009	3.96	4.17	3.96	4.08
4395	NASDAQ	ATRO	Mon, Dec 21, 2009	4.23	4.33	4.05	4.22
4394	NASDAQ	ATRO	Fri, Dec 18, 2009	4.08	4.27	3.90	4.21
4393	NASDAQ	ATRO	Thu, Dec 17, 2009	4.12	4.26	3.93	4.04
4392	NASDAQ	ATRO	Wed, Dec 16, 2009	4.19	4.31	4.11	4.11
4391	NASDAQ	ATRO	Tue, Dec 15, 2009	4.13	4.38	4.13	4.16
4390	NASDAQ	ATRO	Mon, Dec 14, 2009	3.91	4.17	3.73	4.12
4389	NASDAQ	ATRO	Fri, Dec 11, 2009	3.89	3.99	3.84	3.89
4388	NASDAQ	ATRO	Thu, Dec 10, 2009	4.18	4.18	3.85	3.86
4387	NASDAQ	ATRO	Wed, Dec 9, 2009	3.94	4.18	3.83	4.10
4386	NASDAQ	ATRO	Tue, Dec 8, 2009	3.89	4.02	3.75	3.95
4385	NASDAQ	ATRO	Mon, Dec 7, 2009	3.76	3.93	3.76	3.92
4384	NASDAQ	ATRO	Fri, Dec 4, 2009	3.66	3.80	3.59	3.77
4383	NASDAQ	ATRO	Thu, Dec 3, 2009	3.70	3.73	3.52	3.59
4382	NASDAQ	ATRO	Wed, Dec 2, 2009	3.69	3.74	3.62	3.68
4381	NASDAQ	ATRO	Tue, Dec 1, 2009	3.63	3.74	3.56	3.62
4380	NASDAQ	ATRO	Mon, Nov 30, 2009	3.51	3.65	3.48	3.60
4379	NASDAQ	ATRO	Fri, Nov 27, 2009	3.61	3.68	3.49	3.49
4378	NASDAQ	ATRO	Wed, Nov 25, 2009	3.84	3.84	3.58	3.63
4377	NASDAQ	ATRO	Tue, Nov 24, 2009	3.59	3.65	3.56	3.64
4376	NASDAQ	ATRO	Mon, Nov 23, 2009	3.70	3.78	3.62	3.63
4375	NASDAQ	ATRO	Fri, Nov 20, 2009	3.59	3.72	3.59	3.67
4374	NASDAQ	ATRO	Thu, Nov 19, 2009	3.75	3.86	3.57	3.61
4373	NASDAQ	ATRO	Wed, Nov 18, 2009	3.89	3.93	3.73	3.78
4372	NASDAQ	ATRO	Tue, Nov 17, 2009	3.95	3.99	3.84	3.88
4371	NASDAQ	ATRO	Mon, Nov 16, 2009	3.77	4.03	3.70	3.97
4370	NASDAQ	ATRO	Fri, Nov 13, 2009	3.77	3.78	3.68	3.74
4369	NASDAQ	ATRO	Thu, Nov 12, 2009	3.82	3.82	3.65	3.67
4368	NASDAQ	ATRO	Wed, Nov 11, 2009	3.85	3.95	3.72	3.83
4367	NASDAQ	ATRO	Tue, Nov 10, 2009	3.89	3.91	3.70	3.82
4366	NASDAQ	ATRO	Mon, Nov 9, 2009	4.06	4.06	3.79	3.92
4365	NASDAQ	ATRO	Fri, Nov 6, 2009	4.01	4.08	3.86	4.04
4364	NASDAQ	ATRO	Thu, Nov 5, 2009	3.91	4.06	3.80	4.05
4363	NASDAQ	ATRO	Wed, Nov 4, 2009	3.74	3.74	3.52	3.61
4362	NASDAQ	ATRO	Tue, Nov 3, 2009	3.69	3.82	3.66	3.75
4361	NASDAQ	ATRO	Mon, Nov 2, 2009	3.79	3.82	3.60	3.69
4360	NASDAQ	ATRO	Fri, Oct 30, 2009	3.83	3.91	3.79	3.79
4359	NASDAQ	ATRO	Thu, Oct 29, 2009	3.85	3.91	3.80	3.83
4358	NASDAQ	ATRO	Wed, Oct 28, 2009	3.84	3.95	3.78	3.81
4357	NASDAQ	ATRO	Tue, Oct 27, 2009	3.80	3.96	3.80	3.83
4356	NASDAQ	ATRO	Mon, Oct 26, 2009	3.84	4.00	3.77	3.82
4355	NASDAQ	ATRO	Fri, Oct 23, 2009	3.94	4.18	3.80	3.84
4354	NASDAQ	ATRO	Thu, Oct 22, 2009	3.88	3.97	3.79	3.92
4353	NASDAQ	ATRO	Wed, Oct 21, 2009	4.05	4.06	3.82	3.84
4352	NASDAQ	ATRO	Tue, Oct 20, 2009	4.22	4.24	4.04	4.07
4351	NASDAQ	ATRO	Mon, Oct 19, 2009	4.12	4.43	4.09	4.34
4350	NASDAQ	ATRO	Fri, Oct 16, 2009	4.10	4.18	4.09	4.13
4349	NASDAQ	ATRO	Thu, Oct 15, 2009	4.30	4.30	4.09	4.11
4348	NASDAQ	ATRO	Wed, Oct 14, 2009	4.31	4.40	4.14	4.33
4347	NASDAQ	ATRO	Tue, Oct 13, 2009	4.27	4.33	4.14	4.28
4346	NASDAQ	ATRO	Mon, Oct 12, 2009	4.38	4.40	4.27	4.28
4345	NASDAQ	ATRO	Fri, Oct 9, 2009	4.21	4.35	4.21	4.35
4344	NASDAQ	ATRO	Thu, Oct 8, 2009	4.39	4.39	4.34	4.34
4343	NASDAQ	ATRO	Wed, Oct 7, 2009	4.34	4.40	4.31	4.37
4342	NASDAQ	ATRO	Tue, Oct 6, 2009	4.31	4.37	4.10	4.37
4341	NASDAQ	ATRO	Mon, Oct 5, 2009	4.15	4.28	4.15	4.23
4340	NASDAQ	ATRO	Fri, Oct 2, 2009	4.01	4.15	3.87	4.00
4339	NASDAQ	ATRO	Thu, Oct 1, 2009	4.13	4.16	3.94	4.04
4338	NASDAQ	ATRO	Wed, Sep 30, 2009	4.35	4.35	4.11	4.29
4337	NASDAQ	ATRO	Tue, Sep 29, 2009	4.36	4.49	4.23	4.33
4336	NASDAQ	ATRO	Mon, Sep 28, 2009	4.34	4.40	4.31	4.35
4335	NASDAQ	ATRO	Fri, Sep 25, 2009	4.21	4.31	4.18	4.31
4334	NASDAQ	ATRO	Thu, Sep 24, 2009	4.28	4.28	4.17	4.23
4333	NASDAQ	ATRO	Wed, Sep 23, 2009	4.26	4.30	4.11	4.25
4332	NASDAQ	ATRO	Tue, Sep 22, 2009	4.36	4.37	4.24	4.24
4331	NASDAQ	ATRO	Mon, Sep 21, 2009	4.29	4.36	4.23	4.33
4330	NASDAQ	ATRO	Fri, Sep 18, 2009	4.35	4.36	4.23	4.32
4329	NASDAQ	ATRO	Thu, Sep 17, 2009	4.31	4.36	4.30	4.36
4328	NASDAQ	ATRO	Wed, Sep 16, 2009	4.31	4.46	4.24	4.31
4327	NASDAQ	ATRO	Tue, Sep 15, 2009	4.45	4.45	4.32	4.32
4326	NASDAQ	ATRO	Mon, Sep 14, 2009	4.26	4.49	4.07	4.47
4325	NASDAQ	ATRO	Fri, Sep 11, 2009	4.28	4.33	4.21	4.31
4324	NASDAQ	ATRO	Thu, Sep 10, 2009	4.21	4.29	4.08	4.29
4323	NASDAQ	ATRO	Wed, Sep 9, 2009	4.05	4.27	4.05	4.20
4322	NASDAQ	ATRO	Tue, Sep 8, 2009	4.11	4.13	3.92	4.06
4321	NASDAQ	ATRO	Fri, Sep 4, 2009	3.82	4.16	3.82	4.11
4320	NASDAQ	ATRO	Thu, Sep 3, 2009	3.69	3.88	3.69	3.81
4319	NASDAQ	ATRO	Wed, Sep 2, 2009	3.83	3.83	3.70	3.74
4318	NASDAQ	ATRO	Tue, Sep 1, 2009	3.99	4.10	3.80	3.83
4317	NASDAQ	ATRO	Mon, Aug 31, 2009	4.17	4.18	3.99	3.99
4316	NASDAQ	ATRO	Fri, Aug 28, 2009	4.29	4.29	4.11	4.17
4315	NASDAQ	ATRO	Thu, Aug 27, 2009	4.15	4.37	4.14	4.31
4314	NASDAQ	ATRO	Wed, Aug 26, 2009	4.59	4.66	4.34	4.57
4313	NASDAQ	ATRO	Tue, Aug 25, 2009	4.72	4.80	4.49	4.68
4312	NASDAQ	ATRO	Mon, Aug 24, 2009	4.83	4.83	4.58	4.63
4311	NASDAQ	ATRO	Fri, Aug 21, 2009	4.89	4.89	4.50	4.84
4310	NASDAQ	ATRO	Thu, Aug 20, 2009	4.81	4.91	4.64	4.81
4309	NASDAQ	ATRO	Wed, Aug 19, 2009	4.61	4.84	4.44	4.80
4308	NASDAQ	ATRO	Tue, Aug 18, 2009	4.59	4.79	4.52	4.65
4307	NASDAQ	ATRO	Mon, Aug 17, 2009	4.65	4.83	4.48	4.60
4306	NASDAQ	ATRO	Fri, Aug 14, 2009	4.93	4.95	4.73	4.73
4305	NASDAQ	ATRO	Thu, Aug 13, 2009	4.81	4.91	4.67	4.91
4304	NASDAQ	ATRO	Wed, Aug 12, 2009	4.35	4.89	4.35	4.82
4303	NASDAQ	ATRO	Tue, Aug 11, 2009	4.77	4.79	4.51	4.76
4302	NASDAQ	ATRO	Mon, Aug 10, 2009	4.68	4.82	4.58	4.79
4301	NASDAQ	ATRO	Fri, Aug 7, 2009	4.46	4.71	4.37	4.70
4300	NASDAQ	ATRO	Thu, Aug 6, 2009	4.60	4.67	4.37	4.39
4299	NASDAQ	ATRO	Wed, Aug 5, 2009	4.74	4.74	4.54	4.56
4298	NASDAQ	ATRO	Tue, Aug 4, 2009	4.83	4.83	4.64	4.78
4297	NASDAQ	ATRO	Mon, Aug 3, 2009	5.07	5.07	4.67	4.86
4296	NASDAQ	ATRO	Fri, Jul 31, 2009	4.38	5.03	4.38	5.00
4295	NASDAQ	ATRO	Thu, Jul 30, 2009	4.63	5.19	4.63	5.10
4294	NASDAQ	ATRO	Wed, Jul 29, 2009	5.03	5.18	4.86	5.02
4293	NASDAQ	ATRO	Tue, Jul 28, 2009	5.05	5.09	5.02	5.09
4292	NASDAQ	ATRO	Mon, Jul 27, 2009	5.09	5.09	5.02	5.05
4291	NASDAQ	ATRO	Fri, Jul 24, 2009	4.98	5.08	4.90	5.05
4290	NASDAQ	ATRO	Thu, Jul 23, 2009	4.87	5.14	4.75	5.10
4289	NASDAQ	ATRO	Wed, Jul 22, 2009	4.95	4.95	4.80	4.89
4288	NASDAQ	ATRO	Tue, Jul 21, 2009	5.10	5.10	4.84	4.94
4287	NASDAQ	ATRO	Mon, Jul 20, 2009	5.07	5.11	5.02	5.10
4286	NASDAQ	ATRO	Fri, Jul 17, 2009	4.96	5.10	4.78	5.05
4285	NASDAQ	ATRO	Thu, Jul 16, 2009	4.89	4.97	4.78	4.94
4284	NASDAQ	ATRO	Wed, Jul 15, 2009	4.80	4.93	4.75	4.92
4283	NASDAQ	ATRO	Tue, Jul 14, 2009	4.85	4.89	4.73	4.80
4282	NASDAQ	ATRO	Mon, Jul 13, 2009	4.86	4.90	4.68	4.86
4281	NASDAQ	ATRO	Fri, Jul 10, 2009	4.58	4.90	4.54	4.85
4280	NASDAQ	ATRO	Thu, Jul 9, 2009	4.67	4.71	4.54	4.58
4279	NASDAQ	ATRO	Wed, Jul 8, 2009	4.65	4.72	4.49	4.64
4278	NASDAQ	ATRO	Tue, Jul 7, 2009	4.69	4.78	4.50	4.62
4277	NASDAQ	ATRO	Mon, Jul 6, 2009	4.51	4.74	4.49	4.67
4276	NASDAQ	ATRO	Thu, Jul 2, 2009	4.75	4.75	4.34	4.52
4275	NASDAQ	ATRO	Wed, Jul 1, 2009	4.80	4.91	4.68	4.74
4274	NASDAQ	ATRO	Tue, Jun 30, 2009	4.84	4.89	4.74	4.74
4273	NASDAQ	ATRO	Mon, Jun 29, 2009	4.81	4.86	4.66	4.81
4272	NASDAQ	ATRO	Fri, Jun 26, 2009	4.68	4.89	4.45	4.88
4271	NASDAQ	ATRO	Thu, Jun 25, 2009	4.52	4.73	4.52	4.61
4270	NASDAQ	ATRO	Wed, Jun 24, 2009	4.77	4.83	4.38	4.45
4269	NASDAQ	ATRO	Tue, Jun 23, 2009	4.83	4.97	4.60	4.72
4268	NASDAQ	ATRO	Mon, Jun 22, 2009	4.67	5.02	4.55	4.84
4267	NASDAQ	ATRO	Fri, Jun 19, 2009	4.69	4.81	4.63	4.81
4266	NASDAQ	ATRO	Thu, Jun 18, 2009	4.49	4.86	4.38	4.75
4265	NASDAQ	ATRO	Wed, Jun 17, 2009	4.17	4.57	4.12	4.57
4264	NASDAQ	ATRO	Tue, Jun 16, 2009	4.32	4.35	4.11	4.26
4263	NASDAQ	ATRO	Mon, Jun 15, 2009	4.57	4.58	4.31	4.31
4262	NASDAQ	ATRO	Fri, Jun 12, 2009	4.70	4.70	4.52	4.57
4261	NASDAQ	ATRO	Thu, Jun 11, 2009	4.56	4.78	4.56	4.77
4260	NASDAQ	ATRO	Wed, Jun 10, 2009	4.77	4.83	4.57	4.74
4259	NASDAQ	ATRO	Tue, Jun 9, 2009	4.90	4.90	4.62	4.84
4258	NASDAQ	ATRO	Mon, Jun 8, 2009	4.75	4.94	4.58	4.90
4257	NASDAQ	ATRO	Fri, Jun 5, 2009	4.79	5.00	4.75	4.88
4256	NASDAQ	ATRO	Thu, Jun 4, 2009	4.41	4.85	4.27	4.85
4255	NASDAQ	ATRO	Wed, Jun 3, 2009	4.36	4.49	4.20	4.49
4254	NASDAQ	ATRO	Tue, Jun 2, 2009	4.28	4.49	4.22	4.46
4253	NASDAQ	ATRO	Mon, Jun 1, 2009	4.31	4.47	4.21	4.36
4252	NASDAQ	ATRO	Fri, May 29, 2009	4.22	4.45	4.16	4.34
4251	NASDAQ	ATRO	Thu, May 28, 2009	4.26	4.28	4.10	4.23
4250	NASDAQ	ATRO	Wed, May 27, 2009	4.15	4.27	4.05	4.16
4249	NASDAQ	ATRO	Tue, May 26, 2009	4.02	4.20	4.02	4.08
4248	NASDAQ	ATRO	Fri, May 22, 2009	3.92	4.13	3.83	4.02
4247	NASDAQ	ATRO	Thu, May 21, 2009	3.95	4.07	3.88	3.92
4246	NASDAQ	ATRO	Wed, May 20, 2009	3.94	4.07	3.81	3.93
4245	NASDAQ	ATRO	Tue, May 19, 2009	3.78	3.86	3.76	3.85
4244	NASDAQ	ATRO	Mon, May 18, 2009	3.59	4.35	3.59	3.90
4243	NASDAQ	ATRO	Fri, May 15, 2009	3.74	3.78	3.27	3.65
4242	NASDAQ	ATRO	Thu, May 14, 2009	3.78	3.86	3.47	3.61
4241	NASDAQ	ATRO	Wed, May 13, 2009	4.18	4.18	3.83	3.94
4240	NASDAQ	ATRO	Tue, May 12, 2009	4.32	4.32	4.18	4.21
4239	NASDAQ	ATRO	Mon, May 11, 2009	4.30	4.30	4.06	4.20
4238	NASDAQ	ATRO	Fri, May 8, 2009	3.99	4.20	3.93	4.16
4237	NASDAQ	ATRO	Thu, May 7, 2009	4.30	4.30	3.74	3.86
4236	NASDAQ	ATRO	Wed, May 6, 2009	4.34	4.36	4.25	4.25
4235	NASDAQ	ATRO	Tue, May 5, 2009	4.30	4.48	3.97	4.28
4234	NASDAQ	ATRO	Mon, May 4, 2009	4.64	4.77	3.55	3.60
4233	NASDAQ	ATRO	Fri, May 1, 2009	4.92	5.06	4.92	4.97
4232	NASDAQ	ATRO	Thu, Apr 30, 2009	5.11	5.16	4.81	4.99
4231	NASDAQ	ATRO	Wed, Apr 29, 2009	4.82	5.19	4.82	5.02
4230	NASDAQ	ATRO	Tue, Apr 28, 2009	4.84	4.92	4.75	4.85
4229	NASDAQ	ATRO	Mon, Apr 27, 2009	4.68	4.94	4.57	4.85
4228	NASDAQ	ATRO	Fri, Apr 24, 2009	5.23	5.23	4.86	4.86
4227	NASDAQ	ATRO	Thu, Apr 23, 2009	5.20	5.22	5.18	5.21
4226	NASDAQ	ATRO	Wed, Apr 22, 2009	5.17	5.25	5.14	5.23
4225	NASDAQ	ATRO	Tue, Apr 21, 2009	5.23	5.23	5.10	5.15
4224	NASDAQ	ATRO	Mon, Apr 20, 2009	5.24	5.24	5.05	5.18
4223	NASDAQ	ATRO	Fri, Apr 17, 2009	5.25	5.28	5.10	5.24
4222	NASDAQ	ATRO	Thu, Apr 16, 2009	5.14	5.31	5.04	5.24
4221	NASDAQ	ATRO	Wed, Apr 15, 2009	4.71	5.11	4.65	5.07
4220	NASDAQ	ATRO	Tue, Apr 14, 2009	4.95	4.97	4.76	4.83
4219	NASDAQ	ATRO	Mon, Apr 13, 2009	4.71	4.97	4.70	4.89
4218	NASDAQ	ATRO	Thu, Apr 9, 2009	4.89	5.14	4.85	5.00
4217	NASDAQ	ATRO	Wed, Apr 8, 2009	4.92	4.92	4.75	4.81
4216	NASDAQ	ATRO	Tue, Apr 7, 2009	4.73	4.83	4.73	4.80
4215	NASDAQ	ATRO	Mon, Apr 6, 2009	4.88	4.88	4.73	4.73
4214	NASDAQ	ATRO	Fri, Apr 3, 2009	4.95	4.95	4.59	4.91
4213	NASDAQ	ATRO	Thu, Apr 2, 2009	4.91	5.08	4.91	5.04
4212	NASDAQ	ATRO	Wed, Apr 1, 2009	4.82	5.09	4.79	5.09
4211	NASDAQ	ATRO	Tue, Mar 31, 2009	4.90	5.11	4.61	5.02
4210	NASDAQ	ATRO	Mon, Mar 30, 2009	4.91	4.91	4.63	4.76
4209	NASDAQ	ATRO	Fri, Mar 27, 2009	5.00	5.12	4.89	5.05
4208	NASDAQ	ATRO	Thu, Mar 26, 2009	5.02	5.16	4.99	5.14
4207	NASDAQ	ATRO	Wed, Mar 25, 2009	4.88	5.33	4.88	5.11
4206	NASDAQ	ATRO	Tue, Mar 24, 2009	4.69	5.08	4.68	4.97
4205	NASDAQ	ATRO	Mon, Mar 23, 2009	4.38	4.80	4.34	4.65
4204	NASDAQ	ATRO	Fri, Mar 20, 2009	4.26	4.39	3.98	4.38
4203	NASDAQ	ATRO	Thu, Mar 19, 2009	4.10	4.17	3.55	4.17
4202	NASDAQ	ATRO	Wed, Mar 18, 2009	3.86	3.99	3.77	3.94
4201	NASDAQ	ATRO	Tue, Mar 17, 2009	3.53	3.82	3.53	3.82
4200	NASDAQ	ATRO	Mon, Mar 16, 2009	3.36	3.55	3.36	3.46
4199	NASDAQ	ATRO	Fri, Mar 13, 2009	3.35	3.41	3.29	3.41
4198	NASDAQ	ATRO	Thu, Mar 12, 2009	3.08	3.28	2.88	3.24
4197	NASDAQ	ATRO	Wed, Mar 11, 2009	3.20	3.28	3.10	3.14
4196	NASDAQ	ATRO	Tue, Mar 10, 2009	3.15	3.21	3.09	3.17
4195	NASDAQ	ATRO	Mon, Mar 9, 2009	3.26	3.31	3.10	3.11
4194	NASDAQ	ATRO	Fri, Mar 6, 2009	3.38	3.38	3.29	3.33
4193	NASDAQ	ATRO	Thu, Mar 5, 2009	3.52	3.52	3.31	3.38
4192	NASDAQ	ATRO	Wed, Mar 4, 2009	3.52	3.54	3.50	3.53
4191	NASDAQ	ATRO	Tue, Mar 3, 2009	3.58	3.58	3.43	3.49
4190	NASDAQ	ATRO	Mon, Mar 2, 2009	3.72	3.83	3.59	3.62
4189	NASDAQ	ATRO	Fri, Feb 27, 2009	3.53	3.74	3.51	3.73
4188	NASDAQ	ATRO	Thu, Feb 26, 2009	3.72	3.80	3.65	3.70
4187	NASDAQ	ATRO	Wed, Feb 25, 2009	3.92	4.00	3.63	3.72
4186	NASDAQ	ATRO	Tue, Feb 24, 2009	3.99	4.01	3.88	3.99
4185	NASDAQ	ATRO	Mon, Feb 23, 2009	3.97	4.09	3.88	3.98
4184	NASDAQ	ATRO	Fri, Feb 20, 2009	4.14	4.47	3.77	3.84
4183	NASDAQ	ATRO	Thu, Feb 19, 2009	4.11	4.26	4.11	4.11
4182	NASDAQ	ATRO	Wed, Feb 18, 2009	4.16	4.21	3.95	4.06
4181	NASDAQ	ATRO	Tue, Feb 17, 2009	4.35	4.46	3.94	4.24
4180	NASDAQ	ATRO	Fri, Feb 13, 2009	4.12	4.53	4.12	4.30
4179	NASDAQ	ATRO	Thu, Feb 12, 2009	3.60	4.22	3.60	4.10
4178	NASDAQ	ATRO	Wed, Feb 11, 2009	3.25	3.33	3.20	3.28
4177	NASDAQ	ATRO	Tue, Feb 10, 2009	3.27	3.38	3.20	3.24
4176	NASDAQ	ATRO	Mon, Feb 9, 2009	3.48	3.48	3.27	3.35
4175	NASDAQ	ATRO	Fri, Feb 6, 2009	3.47	3.49	3.31	3.36
4174	NASDAQ	ATRO	Thu, Feb 5, 2009	3.26	3.46	3.26	3.43
4173	NASDAQ	ATRO	Wed, Feb 4, 2009	3.31	3.43	3.31	3.34
4172	NASDAQ	ATRO	Tue, Feb 3, 2009	3.46	3.46	3.25	3.25
4171	NASDAQ	ATRO	Mon, Feb 2, 2009	3.40	3.56	3.27	3.38
4170	NASDAQ	ATRO	Fri, Jan 30, 2009	3.31	3.56	3.16	3.45
4169	NASDAQ	ATRO	Thu, Jan 29, 2009	3.26	3.34	3.20	3.28
4168	NASDAQ	ATRO	Wed, Jan 28, 2009	3.24	3.41	3.24	3.27
4167	NASDAQ	ATRO	Tue, Jan 27, 2009	3.30	3.30	3.17	3.28
4166	NASDAQ	ATRO	Mon, Jan 26, 2009	3.20	3.36	3.16	3.24
4165	NASDAQ	ATRO	Fri, Jan 23, 2009	3.15	3.25	3.15	3.19
4164	NASDAQ	ATRO	Thu, Jan 22, 2009	3.26	3.34	3.15	3.18
4163	NASDAQ	ATRO	Wed, Jan 21, 2009	3.10	3.56	3.10	3.24
4162	NASDAQ	ATRO	Tue, Jan 20, 2009	3.24	3.30	3.10	3.13
4161	NASDAQ	ATRO	Fri, Jan 16, 2009	3.20	3.28	3.20	3.22
4160	NASDAQ	ATRO	Thu, Jan 15, 2009	3.31	3.31	3.24	3.28
4159	NASDAQ	ATRO	Wed, Jan 14, 2009	3.41	3.45	3.20	3.31
4158	NASDAQ	ATRO	Tue, Jan 13, 2009	3.42	3.56	3.34	3.42
4157	NASDAQ	ATRO	Mon, Jan 12, 2009	3.53	3.58	3.38	3.43
4156	NASDAQ	ATRO	Fri, Jan 9, 2009	3.64	3.64	3.35	3.53
4155	NASDAQ	ATRO	Thu, Jan 8, 2009	3.66	3.87	3.50	3.64
4154	NASDAQ	ATRO	Wed, Jan 7, 2009	3.95	3.95	3.65	3.74
4153	NASDAQ	ATRO	Tue, Jan 6, 2009	4.06	4.06	3.71	3.86
4152	NASDAQ	ATRO	Mon, Jan 5, 2009	4.09	4.09	3.68	3.83
4151	NASDAQ	ATRO	Fri, Jan 2, 2009	4.05	4.18	3.69	4.08
4150	NASDAQ	ATRO	Wed, Dec 31, 2008	3.74	4.06	3.54	4.06
4149	NASDAQ	ATRO	Tue, Dec 30, 2008	3.64	3.76	3.40	3.76
4148	NASDAQ	ATRO	Mon, Dec 29, 2008	3.42	3.74	3.31	3.66
4147	NASDAQ	ATRO	Fri, Dec 26, 2008	3.45	3.56	3.43	3.43
4146	NASDAQ	ATRO	Wed, Dec 24, 2008	3.47	3.59	3.42	3.45
4145	NASDAQ	ATRO	Tue, Dec 23, 2008	3.64	3.64	3.43	3.48
4144	NASDAQ	ATRO	Mon, Dec 22, 2008	3.57	3.67	3.57	3.65
4143	NASDAQ	ATRO	Fri, Dec 19, 2008	3.62	3.76	3.54	3.54
4142	NASDAQ	ATRO	Thu, Dec 18, 2008	3.68	3.74	3.58	3.63
4141	NASDAQ	ATRO	Wed, Dec 17, 2008	3.65	3.78	3.47	3.70
4140	NASDAQ	ATRO	Tue, Dec 16, 2008	3.42	3.83	3.42	3.70
4139	NASDAQ	ATRO	Mon, Dec 15, 2008	3.66	3.80	3.65	3.65
4138	NASDAQ	ATRO	Fri, Dec 12, 2008	3.61	3.88	3.49	3.68
4137	NASDAQ	ATRO	Thu, Dec 11, 2008	3.65	3.82	3.65	3.69
4136	NASDAQ	ATRO	Wed, Dec 10, 2008	3.65	3.84	3.47	3.70
4135	NASDAQ	ATRO	Tue, Dec 9, 2008	3.75	3.75	3.57	3.60
4134	NASDAQ	ATRO	Mon, Dec 8, 2008	3.78	3.83	3.63	3.79
4133	NASDAQ	ATRO	Fri, Dec 5, 2008	3.61	3.72	3.43	3.58
4132	NASDAQ	ATRO	Thu, Dec 4, 2008	3.74	3.82	3.54	3.64
4131	NASDAQ	ATRO	Wed, Dec 3, 2008	3.44	3.72	3.42	3.61
4130	NASDAQ	ATRO	Tue, Dec 2, 2008	3.38	3.61	3.35	3.55
4129	NASDAQ	ATRO	Mon, Dec 1, 2008	3.58	3.78	3.31	3.34
4128	NASDAQ	ATRO	Fri, Nov 28, 2008	3.47	3.88	3.46	3.70
4127	NASDAQ	ATRO	Wed, Nov 26, 2008	3.72	3.79	3.31	3.73
4126	NASDAQ	ATRO	Tue, Nov 25, 2008	3.54	3.60	3.32	3.51
4125	NASDAQ	ATRO	Mon, Nov 24, 2008	3.64	3.69	3.52	3.65
4124	NASDAQ	ATRO	Fri, Nov 21, 2008	3.60	3.66	3.24	3.66
4123	NASDAQ	ATRO	Thu, Nov 20, 2008	3.79	3.79	3.61	3.62
4122	NASDAQ	ATRO	Wed, Nov 19, 2008	3.93	4.02	3.89	3.93
4121	NASDAQ	ATRO	Tue, Nov 18, 2008	3.92	4.05	3.78	3.93
4120	NASDAQ	ATRO	Mon, Nov 17, 2008	3.99	4.20	3.85	4.00
4119	NASDAQ	ATRO	Fri, Nov 14, 2008	4.25	4.25	3.92	4.00
4118	NASDAQ	ATRO	Thu, Nov 13, 2008	4.03	4.27	3.88	4.24
4117	NASDAQ	ATRO	Wed, Nov 12, 2008	4.00	4.13	4.00	4.06
4116	NASDAQ	ATRO	Tue, Nov 11, 2008	4.10	4.27	4.05	4.11
4115	NASDAQ	ATRO	Mon, Nov 10, 2008	4.20	4.32	4.00	4.14
4114	NASDAQ	ATRO	Fri, Nov 7, 2008	4.38	4.42	4.15	4.25
4113	NASDAQ	ATRO	Thu, Nov 6, 2008	4.70	4.70	4.23	4.43
4112	NASDAQ	ATRO	Wed, Nov 5, 2008	5.02	5.09	4.69	4.76
4111	NASDAQ	ATRO	Tue, Nov 4, 2008	5.27	5.40	4.72	5.12
4110	NASDAQ	ATRO	Mon, Nov 3, 2008	5.74	5.74	5.31	5.46
4109	NASDAQ	ATRO	Fri, Oct 31, 2008	5.68	6.08	5.48	5.71
4108	NASDAQ	ATRO	Thu, Oct 30, 2008	4.79	5.93	4.11	5.84
4107	NASDAQ	ATRO	Wed, Oct 29, 2008	5.55	6.14	5.44	6.02
4106	NASDAQ	ATRO	Tue, Oct 28, 2008	5.86	5.86	5.43	5.54
4105	NASDAQ	ATRO	Mon, Oct 27, 2008	5.69	5.89	5.32	5.59
4104	NASDAQ	ATRO	Fri, Oct 24, 2008	5.48	5.91	5.34	5.80
4103	NASDAQ	ATRO	Thu, Oct 23, 2008	5.59	5.91	5.48	5.76
4102	NASDAQ	ATRO	Wed, Oct 22, 2008	5.94	5.96	5.52	5.59
4101	NASDAQ	ATRO	Tue, Oct 21, 2008	5.87	6.10	5.49	5.94
4100	NASDAQ	ATRO	Mon, Oct 20, 2008	5.75	5.82	5.28	5.34
4099	NASDAQ	ATRO	Fri, Oct 17, 2008	5.67	5.77	5.25	5.59
4098	NASDAQ	ATRO	Thu, Oct 16, 2008	5.48	5.73	4.80	5.66
4097	NASDAQ	ATRO	Wed, Oct 15, 2008	5.93	6.07	5.18	5.35
4096	NASDAQ	ATRO	Tue, Oct 14, 2008	5.90	6.16	5.68	5.98
4095	NASDAQ	ATRO	Mon, Oct 13, 2008	5.37	6.76	5.37	5.63
4094	NASDAQ	ATRO	Fri, Oct 10, 2008	5.58	6.16	4.79	5.27
4093	NASDAQ	ATRO	Thu, Oct 9, 2008	6.53	6.68	5.49	6.08
4092	NASDAQ	ATRO	Wed, Oct 8, 2008	5.46	6.62	5.00	6.45
4091	NASDAQ	ATRO	Tue, Oct 7, 2008	6.64	6.64	5.58	5.67
4090	NASDAQ	ATRO	Mon, Oct 6, 2008	7.43	7.43	5.30	6.32
4089	NASDAQ	ATRO	Fri, Oct 3, 2008	8.75	8.88	6.89	7.80
4088	NASDAQ	ATRO	Thu, Oct 2, 2008	9.99	9.99	8.26	8.61
4087	NASDAQ	ATRO	Wed, Oct 1, 2008	10.50	10.50	9.88	10.14
4086	NASDAQ	ATRO	Tue, Sep 30, 2008	10.24	10.47	10.09	10.43
4085	NASDAQ	ATRO	Mon, Sep 29, 2008	9.91	10.68	9.70	10.34
4084	NASDAQ	ATRO	Fri, Sep 26, 2008	10.74	10.97	10.15	10.63
4083	NASDAQ	ATRO	Thu, Sep 25, 2008	10.93	11.30	10.73	10.83
4082	NASDAQ	ATRO	Wed, Sep 24, 2008	10.99	11.29	10.63	11.18
4081	NASDAQ	ATRO	Tue, Sep 23, 2008	10.80	11.30	10.47	11.11
4080	NASDAQ	ATRO	Mon, Sep 22, 2008	10.06	11.06	10.06	10.89
4079	NASDAQ	ATRO	Fri, Sep 19, 2008	10.18	11.21	10.08	10.71
4078	NASDAQ	ATRO	Thu, Sep 18, 2008	8.72	9.60	8.72	9.30
4077	NASDAQ	ATRO	Wed, Sep 17, 2008	8.91	9.82	8.81	8.92
4076	NASDAQ	ATRO	Tue, Sep 16, 2008	10.80	10.81	9.26	9.64
4075	NASDAQ	ATRO	Mon, Sep 15, 2008	10.96	11.36	10.87	11.02
4074	NASDAQ	ATRO	Fri, Sep 12, 2008	11.50	11.50	11.10	11.14
4073	NASDAQ	ATRO	Thu, Sep 11, 2008	11.32	11.46	11.21	11.46
4072	NASDAQ	ATRO	Wed, Sep 10, 2008	11.64	11.64	11.30	11.48
4071	NASDAQ	ATRO	Tue, Sep 9, 2008	11.55	11.80	11.12	11.52
4070	NASDAQ	ATRO	Mon, Sep 8, 2008	11.55	11.68	11.10	11.64
4069	NASDAQ	ATRO	Fri, Sep 5, 2008	11.53	11.58	10.84	11.47
4068	NASDAQ	ATRO	Thu, Sep 4, 2008	11.62	11.80	11.52	11.64
4067	NASDAQ	ATRO	Wed, Sep 3, 2008	11.21	11.65	11.13	11.60
4066	NASDAQ	ATRO	Tue, Sep 2, 2008	11.27	11.41	10.74	11.31
4065	NASDAQ	ATRO	Fri, Aug 29, 2008	10.72	11.19	10.60	11.09
4064	NASDAQ	ATRO	Thu, Aug 28, 2008	10.78	11.29	10.65	10.83
4063	NASDAQ	ATRO	Wed, Aug 27, 2008	10.67	10.95	10.51	10.77
4062	NASDAQ	ATRO	Tue, Aug 26, 2008	10.58	10.92	10.44	10.73
4061	NASDAQ	ATRO	Mon, Aug 25, 2008	10.93	11.06	10.29	10.50
4060	NASDAQ	ATRO	Fri, Aug 22, 2008	10.93	11.19	10.82	11.00
4059	NASDAQ	ATRO	Thu, Aug 21, 2008	11.26	11.26	10.56	10.89
4058	NASDAQ	ATRO	Wed, Aug 20, 2008	10.32	11.36	10.32	11.23
4057	NASDAQ	ATRO	Tue, Aug 19, 2008	10.84	11.01	10.06	10.76
4056	NASDAQ	ATRO	Mon, Aug 18, 2008	11.21	11.34	10.73	10.84
4055	NASDAQ	ATRO	Fri, Aug 15, 2008	11.34	11.51	10.73	11.25
4054	NASDAQ	ATRO	Thu, Aug 14, 2008	11.16	11.62	10.91	11.24
4053	NASDAQ	ATRO	Wed, Aug 13, 2008	11.92	11.92	11.01	11.30
4052	NASDAQ	ATRO	Tue, Aug 12, 2008	11.23	11.97	10.90	11.76
4051	NASDAQ	ATRO	Mon, Aug 11, 2008	11.41	11.41	11.09	11.12
4050	NASDAQ	ATRO	Fri, Aug 8, 2008	10.79	11.37	10.50	11.29
4049	NASDAQ	ATRO	Thu, Aug 7, 2008	10.87	11.27	10.70	10.93
4048	NASDAQ	ATRO	Wed, Aug 6, 2008	10.57	11.60	10.57	10.94
4047	NASDAQ	ATRO	Tue, Aug 5, 2008	10.39	11.70	10.30	11.10
4046	NASDAQ	ATRO	Mon, Aug 4, 2008	9.28	10.40	9.12	10.28
4045	NASDAQ	ATRO	Fri, Aug 1, 2008	8.56	9.59	8.33	9.26
4044	NASDAQ	ATRO	Thu, Jul 31, 2008	6.85	7.05	6.67	6.67
4043	NASDAQ	ATRO	Wed, Jul 30, 2008	6.87	7.06	6.39	7.02
4042	NASDAQ	ATRO	Tue, Jul 29, 2008	6.79	6.94	6.78	6.93
4041	NASDAQ	ATRO	Mon, Jul 28, 2008	6.90	6.97	6.83	6.89
4040	NASDAQ	ATRO	Fri, Jul 25, 2008	6.64	6.84	6.64	6.81
4039	NASDAQ	ATRO	Thu, Jul 24, 2008	6.73	6.73	6.46	6.49
4038	NASDAQ	ATRO	Wed, Jul 23, 2008	6.59	6.73	6.54	6.73
4037	NASDAQ	ATRO	Tue, Jul 22, 2008	6.29	6.55	6.29	6.51
4036	NASDAQ	ATRO	Mon, Jul 21, 2008	6.47	6.48	6.25	6.47
4035	NASDAQ	ATRO	Fri, Jul 18, 2008	6.39	6.55	6.00	6.55
4034	NASDAQ	ATRO	Thu, Jul 17, 2008	6.39	6.39	5.92	6.39
4033	NASDAQ	ATRO	Wed, Jul 16, 2008	5.78	6.32	5.78	6.17
4032	NASDAQ	ATRO	Tue, Jul 15, 2008	5.94	6.03	5.72	5.80
4031	NASDAQ	ATRO	Mon, Jul 14, 2008	6.28	6.44	5.79	5.92
4030	NASDAQ	ATRO	Fri, Jul 11, 2008	6.33	6.33	5.97	6.16
4029	NASDAQ	ATRO	Thu, Jul 10, 2008	6.25	6.42	5.86	6.34
4028	NASDAQ	ATRO	Wed, Jul 9, 2008	6.02	6.30	5.92	6.29
4027	NASDAQ	ATRO	Tue, Jul 8, 2008	5.79	6.04	5.68	5.98
4026	NASDAQ	ATRO	Mon, Jul 7, 2008	5.86	5.94	5.62	5.83
4025	NASDAQ	ATRO	Thu, Jul 3, 2008	6.16	6.16	5.83	5.94
4024	NASDAQ	ATRO	Wed, Jul 2, 2008	6.30	6.40	6.16	6.20
4023	NASDAQ	ATRO	Tue, Jul 1, 2008	6.35	6.65	6.35	6.46
4022	NASDAQ	ATRO	Mon, Jun 30, 2008	6.87	6.88	6.21	6.35
4021	NASDAQ	ATRO	Fri, Jun 27, 2008	6.98	6.99	6.87	6.89
4020	NASDAQ	ATRO	Thu, Jun 26, 2008	7.21	7.21	7.02	7.05
4019	NASDAQ	ATRO	Wed, Jun 25, 2008	7.21	7.25	7.04	7.09
4018	NASDAQ	ATRO	Tue, Jun 24, 2008	7.15	7.34	7.10	7.11
4017	NASDAQ	ATRO	Mon, Jun 23, 2008	7.22	7.33	7.16	7.16
4016	NASDAQ	ATRO	Fri, Jun 20, 2008	7.21	7.40	7.08	7.31
4015	NASDAQ	ATRO	Thu, Jun 19, 2008	7.26	7.42	7.21	7.35
4014	NASDAQ	ATRO	Wed, Jun 18, 2008	7.38	7.38	7.03	7.24
4013	NASDAQ	ATRO	Tue, Jun 17, 2008	7.40	7.45	7.16	7.33
4012	NASDAQ	ATRO	Mon, Jun 16, 2008	7.35	7.44	7.12	7.42
4011	NASDAQ	ATRO	Fri, Jun 13, 2008	7.18	7.44	7.18	7.39
4010	NASDAQ	ATRO	Thu, Jun 12, 2008	7.38	7.40	7.12	7.24
4009	NASDAQ	ATRO	Wed, Jun 11, 2008	7.32	7.53	7.24	7.35
4008	NASDAQ	ATRO	Tue, Jun 10, 2008	7.25	7.53	6.89	7.27
4007	NASDAQ	ATRO	Mon, Jun 9, 2008	7.93	7.95	7.53	7.53
4006	NASDAQ	ATRO	Fri, Jun 6, 2008	8.00	8.00	7.75	7.90
4005	NASDAQ	ATRO	Thu, Jun 5, 2008	8.13	8.16	8.04	8.10
4004	NASDAQ	ATRO	Wed, Jun 4, 2008	7.92	8.16	7.92	8.05
4003	NASDAQ	ATRO	Tue, Jun 3, 2008	7.98	8.16	7.90	8.02
4002	NASDAQ	ATRO	Mon, Jun 2, 2008	8.06	8.15	7.94	8.10
4001	NASDAQ	ATRO	Fri, May 30, 2008	7.92	7.98	7.85	7.96
4000	NASDAQ	ATRO	Thu, May 29, 2008	7.95	7.95	7.76	7.80
3999	NASDAQ	ATRO	Wed, May 28, 2008	7.66	8.06	7.54	8.01
3998	NASDAQ	ATRO	Tue, May 27, 2008	7.59	7.88	7.57	7.73
3997	NASDAQ	ATRO	Fri, May 23, 2008	7.79	7.94	7.79	7.92
3996	NASDAQ	ATRO	Thu, May 22, 2008	8.00	8.00	7.79	7.87
3995	NASDAQ	ATRO	Wed, May 21, 2008	7.74	7.99	7.72	7.83
3994	NASDAQ	ATRO	Tue, May 20, 2008	7.76	7.88	7.56	7.69
3993	NASDAQ	ATRO	Mon, May 19, 2008	7.78	7.87	7.76	7.77
3992	NASDAQ	ATRO	Fri, May 16, 2008	7.76	7.81	7.66	7.78
3991	NASDAQ	ATRO	Thu, May 15, 2008	7.58	7.76	7.58	7.74
3990	NASDAQ	ATRO	Wed, May 14, 2008	7.58	7.72	7.54	7.60
3989	NASDAQ	ATRO	Tue, May 13, 2008	7.62	7.72	7.47	7.68
3988	NASDAQ	ATRO	Mon, May 12, 2008	7.49	7.79	7.42	7.64
3987	NASDAQ	ATRO	Fri, May 9, 2008	7.41	7.47	7.26	7.47
3986	NASDAQ	ATRO	Thu, May 8, 2008	7.48	7.61	7.42	7.57
3985	NASDAQ	ATRO	Wed, May 7, 2008	7.81	7.81	7.45	7.51
3984	NASDAQ	ATRO	Tue, May 6, 2008	7.74	7.79	7.54	7.77
3983	NASDAQ	ATRO	Mon, May 5, 2008	7.74	7.92	7.74	7.78
3982	NASDAQ	ATRO	Fri, May 2, 2008	7.93	8.10	7.72	7.72
3981	NASDAQ	ATRO	Thu, May 1, 2008	7.56	7.91	7.53	7.88
3980	NASDAQ	ATRO	Wed, Apr 30, 2008	8.16	8.16	8.00	8.13
3979	NASDAQ	ATRO	Tue, Apr 29, 2008	8.22	8.26	7.90	8.01
3978	NASDAQ	ATRO	Mon, Apr 28, 2008	7.98	8.24	7.88	8.20
3977	NASDAQ	ATRO	Fri, Apr 25, 2008	7.74	7.99	7.72	7.93
3976	NASDAQ	ATRO	Thu, Apr 24, 2008	7.69	7.80	7.63	7.71
3975	NASDAQ	ATRO	Wed, Apr 23, 2008	8.29	8.44	7.68	7.74
3974	NASDAQ	ATRO	Tue, Apr 22, 2008	8.35	8.40	8.13	8.25
3973	NASDAQ	ATRO	Mon, Apr 21, 2008	8.39	8.53	8.35	8.43
3972	NASDAQ	ATRO	Fri, Apr 18, 2008	8.68	8.68	8.41	8.51
3971	NASDAQ	ATRO	Thu, Apr 17, 2008	8.26	8.61	8.22	8.48
3970	NASDAQ	ATRO	Wed, Apr 16, 2008	8.40	8.74	8.38	8.59
3969	NASDAQ	ATRO	Tue, Apr 15, 2008	8.26	8.45	8.24	8.36
3968	NASDAQ	ATRO	Mon, Apr 14, 2008	8.57	8.57	8.23	8.37
3967	NASDAQ	ATRO	Fri, Apr 11, 2008	8.75	8.80	8.42	8.54
3966	NASDAQ	ATRO	Thu, Apr 10, 2008	9.12	9.15	8.71	8.81
3965	NASDAQ	ATRO	Wed, Apr 9, 2008	9.14	9.19	8.90	9.09
3964	NASDAQ	ATRO	Tue, Apr 8, 2008	8.91	9.14	8.68	9.09
3963	NASDAQ	ATRO	Mon, Apr 7, 2008	9.42	9.44	8.86	8.98
3962	NASDAQ	ATRO	Fri, Apr 4, 2008	9.21	9.56	8.77	9.35
3961	NASDAQ	ATRO	Thu, Apr 3, 2008	9.29	9.32	9.03	9.21
3960	NASDAQ	ATRO	Wed, Apr 2, 2008	9.32	9.37	9.09	9.31
3959	NASDAQ	ATRO	Tue, Apr 1, 2008	9.28	9.34	9.02	9.28
3958	NASDAQ	ATRO	Mon, Mar 31, 2008	8.82	9.05	8.78	8.82
3957	NASDAQ	ATRO	Fri, Mar 28, 2008	8.96	9.10	8.79	8.87
3956	NASDAQ	ATRO	Thu, Mar 27, 2008	9.25	9.25	8.93	9.16
3955	NASDAQ	ATRO	Wed, Mar 26, 2008	9.34	9.54	9.02	9.21
3954	NASDAQ	ATRO	Tue, Mar 25, 2008	8.95	9.36	8.91	9.30
3953	NASDAQ	ATRO	Mon, Mar 24, 2008	8.70	8.99	8.48	8.80
3952	NASDAQ	ATRO	Thu, Mar 20, 2008	9.24	9.41	8.60	8.73
3951	NASDAQ	ATRO	Wed, Mar 19, 2008	9.45	9.63	8.98	9.13
3950	NASDAQ	ATRO	Tue, Mar 18, 2008	9.41	9.64	9.02	9.47
3949	NASDAQ	ATRO	Mon, Mar 17, 2008	8.90	9.68	8.69	9.37
3948	NASDAQ	ATRO	Fri, Mar 14, 2008	8.95	9.40	8.90	9.24
3947	NASDAQ	ATRO	Thu, Mar 13, 2008	8.78	8.95	8.51	8.86
3946	NASDAQ	ATRO	Wed, Mar 12, 2008	8.91	8.94	8.22	8.84
3945	NASDAQ	ATRO	Tue, Mar 11, 2008	8.82	8.86	8.24	8.84
3944	NASDAQ	ATRO	Mon, Mar 10, 2008	8.83	8.83	8.65	8.72
3943	NASDAQ	ATRO	Fri, Mar 7, 2008	9.00	9.24	8.73	8.86
3942	NASDAQ	ATRO	Thu, Mar 6, 2008	9.07	9.14	9.04	9.09
3941	NASDAQ	ATRO	Wed, Mar 5, 2008	8.91	9.28	8.89	9.12
3940	NASDAQ	ATRO	Tue, Mar 4, 2008	8.86	9.08	8.71	8.92
3939	NASDAQ	ATRO	Mon, Mar 3, 2008	8.97	9.03	8.77	8.95
3938	NASDAQ	ATRO	Fri, Feb 29, 2008	8.98	9.09	8.84	9.02
3937	NASDAQ	ATRO	Thu, Feb 28, 2008	9.01	9.31	8.88	9.05
3936	NASDAQ	ATRO	Wed, Feb 27, 2008	8.84	9.09	8.50	9.09
3935	NASDAQ	ATRO	Tue, Feb 26, 2008	8.78	9.07	8.77	8.89
3934	NASDAQ	ATRO	Mon, Feb 25, 2008	9.38	9.41	8.71	8.79
3933	NASDAQ	ATRO	Fri, Feb 22, 2008	8.73	9.55	8.72	9.52
3932	NASDAQ	ATRO	Thu, Feb 21, 2008	9.21	9.31	8.64	8.73
3931	NASDAQ	ATRO	Wed, Feb 20, 2008	9.62	9.62	9.13	9.16
3930	NASDAQ	ATRO	Tue, Feb 19, 2008	10.19	10.19	9.60	9.69
3929	NASDAQ	ATRO	Fri, Feb 15, 2008	10.40	10.47	9.87	10.23
3928	NASDAQ	ATRO	Thu, Feb 14, 2008	12.80	12.82	9.83	10.15
3927	NASDAQ	ATRO	Wed, Feb 13, 2008	14.33	14.88	14.04	14.88
3926	NASDAQ	ATRO	Tue, Feb 12, 2008	13.48	14.33	13.48	14.15
3925	NASDAQ	ATRO	Mon, Feb 11, 2008	13.66	13.79	13.24	13.25
3924	NASDAQ	ATRO	Fri, Feb 8, 2008	14.24	14.51	13.58	13.65
3923	NASDAQ	ATRO	Thu, Feb 7, 2008	14.41	14.99	14.20	14.29
3922	NASDAQ	ATRO	Wed, Feb 6, 2008	15.15	15.35	14.39	14.65
3921	NASDAQ	ATRO	Tue, Feb 5, 2008	15.21	15.43	15.07	15.14
3920	NASDAQ	ATRO	Mon, Feb 4, 2008	15.23	15.37	14.77	15.36
3919	NASDAQ	ATRO	Fri, Feb 1, 2008	15.21	15.52	14.24	15.17
3918	NASDAQ	ATRO	Thu, Jan 31, 2008	14.26	15.24	14.04	14.97
3917	NASDAQ	ATRO	Wed, Jan 30, 2008	15.43	15.96	14.38	14.41
3916	NASDAQ	ATRO	Tue, Jan 29, 2008	15.87	15.87	15.44	15.78
3915	NASDAQ	ATRO	Mon, Jan 28, 2008	16.23	16.24	15.11	15.86
3914	NASDAQ	ATRO	Fri, Jan 25, 2008	16.70	16.96	15.84	15.91
3913	NASDAQ	ATRO	Thu, Jan 24, 2008	15.75	16.79	15.75	16.34
3912	NASDAQ	ATRO	Wed, Jan 23, 2008	14.27	16.57	14.03	15.61
3911	NASDAQ	ATRO	Tue, Jan 22, 2008	15.69	15.75	14.46	14.68
3910	NASDAQ	ATRO	Fri, Jan 18, 2008	16.56	16.90	15.66	16.78
3909	NASDAQ	ATRO	Thu, Jan 17, 2008	16.31	16.67	16.07	16.33
3908	NASDAQ	ATRO	Wed, Jan 16, 2008	16.52	16.83	15.76	16.31
3907	NASDAQ	ATRO	Tue, Jan 15, 2008	17.19	17.71	16.34	16.82
3906	NASDAQ	ATRO	Mon, Jan 14, 2008	16.94	17.97	16.94	17.43
3905	NASDAQ	ATRO	Fri, Jan 11, 2008	17.07	18.43	17.06	17.06
3904	NASDAQ	ATRO	Thu, Jan 10, 2008	16.98	17.78	16.98	17.35
3903	NASDAQ	ATRO	Wed, Jan 9, 2008	17.73	18.02	16.21	17.35
3902	NASDAQ	ATRO	Tue, Jan 8, 2008	16.76	18.20	15.98	17.77
3901	NASDAQ	ATRO	Mon, Jan 7, 2008	18.24	18.24	16.34	16.77
3900	NASDAQ	ATRO	Fri, Jan 4, 2008	18.59	18.99	18.26	18.29
3899	NASDAQ	ATRO	Thu, Jan 3, 2008	19.06	19.57	18.73	19.12
3898	NASDAQ	ATRO	Wed, Jan 2, 2008	19.29	19.39	18.52	18.99
3897	NASDAQ	ATRO	Mon, Dec 31, 2007	19.63	19.81	18.94	19.41
3896	NASDAQ	ATRO	Fri, Dec 28, 2007	20.09	20.77	19.07	19.89
3895	NASDAQ	ATRO	Thu, Dec 27, 2007	21.66	21.73	20.05	20.08
3894	NASDAQ	ATRO	Wed, Dec 26, 2007	21.46	22.37	21.33	21.46
3893	NASDAQ	ATRO	Mon, Dec 24, 2007	19.87	21.28	19.73	21.27
3892	NASDAQ	ATRO	Fri, Dec 21, 2007	19.72	20.20	18.56	19.59
3891	NASDAQ	ATRO	Thu, Dec 20, 2007	18.67	19.50	18.38	19.47
3890	NASDAQ	ATRO	Wed, Dec 19, 2007	18.73	19.15	17.60	18.18
3889	NASDAQ	ATRO	Tue, Dec 18, 2007	18.67	19.28	18.04	18.81
3888	NASDAQ	ATRO	Mon, Dec 17, 2007	20.19	20.21	17.87	18.61
3887	NASDAQ	ATRO	Fri, Dec 14, 2007	20.28	21.00	20.02	20.57
3886	NASDAQ	ATRO	Thu, Dec 13, 2007	20.79	21.45	20.30	20.48
3885	NASDAQ	ATRO	Wed, Dec 12, 2007	21.54	22.47	20.57	21.17
3884	NASDAQ	ATRO	Tue, Dec 11, 2007	24.24	24.43	22.29	22.53
3883	NASDAQ	ATRO	Mon, Dec 10, 2007	24.66	24.68	23.91	24.15
3882	NASDAQ	ATRO	Fri, Dec 7, 2007	24.66	24.66	23.94	24.60
3881	NASDAQ	ATRO	Thu, Dec 6, 2007	24.41	24.72	23.97	24.46
3880	NASDAQ	ATRO	Wed, Dec 5, 2007	24.65	24.68	24.42	24.51
3879	NASDAQ	ATRO	Tue, Dec 4, 2007	24.73	24.73	24.29	24.53
3878	NASDAQ	ATRO	Mon, Dec 3, 2007	24.20	24.75	24.16	24.59
3877	NASDAQ	ATRO	Fri, Nov 30, 2007	24.08	24.20	23.86	24.06
3876	NASDAQ	ATRO	Thu, Nov 29, 2007	24.07	24.07	23.61	23.80
3875	NASDAQ	ATRO	Wed, Nov 28, 2007	23.58	24.11	22.94	23.90
3874	NASDAQ	ATRO	Tue, Nov 27, 2007	23.86	23.86	22.83	23.62
3873	NASDAQ	ATRO	Mon, Nov 26, 2007	23.26	23.81	23.22	23.80
3872	NASDAQ	ATRO	Fri, Nov 23, 2007	22.47	23.15	22.47	23.13
3871	NASDAQ	ATRO	Wed, Nov 21, 2007	22.78	22.78	21.92	22.02
3870	NASDAQ	ATRO	Tue, Nov 20, 2007	22.83	22.83	21.60	22.17
3869	NASDAQ	ATRO	Mon, Nov 19, 2007	22.12	22.83	22.03	22.50
3868	NASDAQ	ATRO	Fri, Nov 16, 2007	20.52	21.92	20.08	21.92
3867	NASDAQ	ATRO	Thu, Nov 15, 2007	21.50	21.78	20.42	20.44
3866	NASDAQ	ATRO	Wed, Nov 14, 2007	21.00	21.78	20.88	21.59
3865	NASDAQ	ATRO	Tue, Nov 13, 2007	19.52	20.76	19.29	20.75
3864	NASDAQ	ATRO	Mon, Nov 12, 2007	19.66	20.54	19.54	19.68
3863	NASDAQ	ATRO	Fri, Nov 9, 2007	20.41	20.54	19.73	19.99
3862	NASDAQ	ATRO	Thu, Nov 8, 2007	21.06	21.18	19.99	20.42
3861	NASDAQ	ATRO	Wed, Nov 7, 2007	20.39	21.10	20.32	20.66
3860	NASDAQ	ATRO	Tue, Nov 6, 2007	21.00	21.11	19.63	20.61
3859	NASDAQ	ATRO	Mon, Nov 5, 2007	19.71	21.00	19.23	20.90
3858	NASDAQ	ATRO	Fri, Nov 2, 2007	19.63	20.59	18.84	20.59
3857	NASDAQ	ATRO	Thu, Nov 1, 2007	19.92	20.55	18.02	18.25
3856	NASDAQ	ATRO	Wed, Oct 31, 2007	19.64	20.32	19.18	20.32
3855	NASDAQ	ATRO	Tue, Oct 30, 2007	20.64	20.64	19.20	19.36
3854	NASDAQ	ATRO	Mon, Oct 29, 2007	20.09	20.64	20.09	20.62
3853	NASDAQ	ATRO	Fri, Oct 26, 2007	18.77	20.04	18.77	19.89
3852	NASDAQ	ATRO	Thu, Oct 25, 2007	18.73	19.20	18.56	18.65
3851	NASDAQ	ATRO	Wed, Oct 24, 2007	18.51	18.64	18.15	18.64
3850	NASDAQ	ATRO	Tue, Oct 23, 2007	17.60	18.42	17.59	18.25
3849	NASDAQ	ATRO	Mon, Oct 22, 2007	16.90	17.53	16.44	17.49
3848	NASDAQ	ATRO	Fri, Oct 19, 2007	18.05	18.09	17.46	17.78
3847	NASDAQ	ATRO	Thu, Oct 18, 2007	18.27	18.38	17.42	18.14
3846	NASDAQ	ATRO	Wed, Oct 17, 2007	19.06	19.41	18.20	18.47
3845	NASDAQ	ATRO	Tue, Oct 16, 2007	20.06	20.06	18.80	18.93
3844	NASDAQ	ATRO	Mon, Oct 15, 2007	19.84	19.84	19.25	19.37
3843	NASDAQ	ATRO	Fri, Oct 12, 2007	19.54	20.06	19.18	19.71
3842	NASDAQ	ATRO	Thu, Oct 11, 2007	20.22	20.31	19.34	19.54
3841	NASDAQ	ATRO	Wed, Oct 10, 2007	19.92	20.20	19.77	20.09
3840	NASDAQ	ATRO	Tue, Oct 9, 2007	19.95	20.21	19.60	20.05
3839	NASDAQ	ATRO	Mon, Oct 8, 2007	19.82	20.18	19.63	19.86
3838	NASDAQ	ATRO	Fri, Oct 5, 2007	19.73	19.73	19.36	19.63
3837	NASDAQ	ATRO	Thu, Oct 4, 2007	19.59	20.03	18.89	19.63
3836	NASDAQ	ATRO	Wed, Oct 3, 2007	20.65	20.75	19.57	19.75
3835	NASDAQ	ATRO	Tue, Oct 2, 2007	20.50	20.72	20.05	20.65
3834	NASDAQ	ATRO	Mon, Oct 1, 2007	19.85	20.55	19.63	20.50
3833	NASDAQ	ATRO	Fri, Sep 28, 2007	19.58	20.02	19.58	19.89
3832	NASDAQ	ATRO	Thu, Sep 27, 2007	19.63	19.63	19.25	19.63
3831	NASDAQ	ATRO	Wed, Sep 26, 2007	19.69	19.84	19.30	19.54
3830	NASDAQ	ATRO	Tue, Sep 25, 2007	18.86	19.61	18.72	19.59
3829	NASDAQ	ATRO	Mon, Sep 24, 2007	18.49	18.90	18.41	18.81
3828	NASDAQ	ATRO	Fri, Sep 21, 2007	18.11	18.61	18.05	18.40
3827	NASDAQ	ATRO	Thu, Sep 20, 2007	17.22	18.38	16.84	18.11
3826	NASDAQ	ATRO	Wed, Sep 19, 2007	17.23	17.24	16.71	17.20
3825	NASDAQ	ATRO	Tue, Sep 18, 2007	17.02	17.11	16.06	17.10
3824	NASDAQ	ATRO	Mon, Sep 17, 2007	16.89	16.99	16.68	16.87
3823	NASDAQ	ATRO	Fri, Sep 14, 2007	16.66	17.03	16.35	16.99
3822	NASDAQ	ATRO	Thu, Sep 13, 2007	16.53	16.58	16.21	16.45
3821	NASDAQ	ATRO	Wed, Sep 12, 2007	16.10	16.43	15.87	16.22
3820	NASDAQ	ATRO	Tue, Sep 11, 2007	14.82	15.97	14.82	15.86
3819	NASDAQ	ATRO	Mon, Sep 10, 2007	15.46	15.46	14.70	14.75
3818	NASDAQ	ATRO	Fri, Sep 7, 2007	15.33	15.37	14.97	15.22
3817	NASDAQ	ATRO	Thu, Sep 6, 2007	15.48	15.84	15.27	15.33
3816	NASDAQ	ATRO	Wed, Sep 5, 2007	15.30	15.61	14.84	15.26
3815	NASDAQ	ATRO	Tue, Sep 4, 2007	15.49	15.89	14.95	15.11
3814	NASDAQ	ATRO	Fri, Aug 31, 2007	14.11	14.35	13.94	14.35
3813	NASDAQ	ATRO	Thu, Aug 30, 2007	13.64	14.27	13.48	13.88
3812	NASDAQ	ATRO	Wed, Aug 29, 2007	13.93	13.96	13.29	13.76
3811	NASDAQ	ATRO	Tue, Aug 28, 2007	14.03	14.03	13.51	13.87
3810	NASDAQ	ATRO	Mon, Aug 27, 2007	14.24	14.24	13.39	13.93
3809	NASDAQ	ATRO	Fri, Aug 24, 2007	13.36	14.16	13.36	13.97
3808	NASDAQ	ATRO	Thu, Aug 23, 2007	13.39	13.94	13.36	13.49
3807	NASDAQ	ATRO	Wed, Aug 22, 2007	13.61	14.26	13.27	13.36
3806	NASDAQ	ATRO	Tue, Aug 21, 2007	13.47	13.69	13.25	13.59
3805	NASDAQ	ATRO	Mon, Aug 20, 2007	13.79	13.91	13.47	13.59
3804	NASDAQ	ATRO	Fri, Aug 17, 2007	14.37	14.61	13.24	13.67
3803	NASDAQ	ATRO	Thu, Aug 16, 2007	14.16	14.60	13.74	13.99
3802	NASDAQ	ATRO	Wed, Aug 15, 2007	14.84	15.06	14.44	14.47
3801	NASDAQ	ATRO	Tue, Aug 14, 2007	14.83	15.22	14.47	14.85
3800	NASDAQ	ATRO	Mon, Aug 13, 2007	14.98	16.18	14.57	14.68
3799	NASDAQ	ATRO	Fri, Aug 10, 2007	13.81	14.71	13.79	14.57
3798	NASDAQ	ATRO	Thu, Aug 9, 2007	14.20	14.44	13.70	14.17
3797	NASDAQ	ATRO	Wed, Aug 8, 2007	15.87	16.21	13.85	14.57
3796	NASDAQ	ATRO	Tue, Aug 7, 2007	15.05	16.00	14.46	15.82
3795	NASDAQ	ATRO	Mon, Aug 6, 2007	15.45	15.46	14.07	15.10
3794	NASDAQ	ATRO	Fri, Aug 3, 2007	16.15	16.15	14.61	15.18
3793	NASDAQ	ATRO	Thu, Aug 2, 2007	16.09	17.10	15.57	15.99
3792	NASDAQ	ATRO	Wed, Aug 1, 2007	15.33	15.84	14.93	15.78
3791	NASDAQ	ATRO	Tue, Jul 31, 2007	14.56	15.44	14.56	15.35
3790	NASDAQ	ATRO	Mon, Jul 30, 2007	14.33	14.57	13.86	14.37
3789	NASDAQ	ATRO	Fri, Jul 27, 2007	14.58	14.58	13.84	14.31
3788	NASDAQ	ATRO	Thu, Jul 26, 2007	15.00	15.10	14.05	14.52
3787	NASDAQ	ATRO	Wed, Jul 25, 2007	15.41	15.69	14.44	14.89
3786	NASDAQ	ATRO	Tue, Jul 24, 2007	15.63	15.63	14.63	15.52
3785	NASDAQ	ATRO	Mon, Jul 23, 2007	14.75	15.64	14.63	15.63
3784	NASDAQ	ATRO	Fri, Jul 20, 2007	15.23	15.23	14.44	15.07
3783	NASDAQ	ATRO	Thu, Jul 19, 2007	13.63	15.27	13.63	15.16
3782	NASDAQ	ATRO	Wed, Jul 18, 2007	14.79	14.79	13.62	14.06
3781	NASDAQ	ATRO	Tue, Jul 17, 2007	14.83	15.17	14.47	14.63
3780	NASDAQ	ATRO	Mon, Jul 16, 2007	15.02	15.19	14.62	14.82
3779	NASDAQ	ATRO	Fri, Jul 13, 2007	15.49	15.50	14.95	15.00
3778	NASDAQ	ATRO	Thu, Jul 12, 2007	15.07	15.38	14.93	15.29
3777	NASDAQ	ATRO	Wed, Jul 11, 2007	14.19	15.05	14.19	15.01
3776	NASDAQ	ATRO	Tue, Jul 10, 2007	14.60	14.60	14.28	14.54
3775	NASDAQ	ATRO	Mon, Jul 9, 2007	14.59	14.78	14.11	14.60
3774	NASDAQ	ATRO	Fri, Jul 6, 2007	14.74	14.74	14.02	14.56
3773	NASDAQ	ATRO	Thu, Jul 5, 2007	15.07	15.07	14.00	14.67
3772	NASDAQ	ATRO	Tue, Jul 3, 2007	14.60	15.09	14.08	14.86
3771	NASDAQ	ATRO	Mon, Jul 2, 2007	14.54	14.75	13.72	14.60
3770	NASDAQ	ATRO	Fri, Jun 29, 2007	15.07	15.66	14.15	14.48
3769	NASDAQ	ATRO	Thu, Jun 28, 2007	14.38	15.06	14.38	14.90
3768	NASDAQ	ATRO	Wed, Jun 27, 2007	13.87	14.15	13.70	14.15
3767	NASDAQ	ATRO	Tue, Jun 26, 2007	13.70	13.77	13.56	13.74
3766	NASDAQ	ATRO	Mon, Jun 25, 2007	14.15	14.61	13.41	13.65
3765	NASDAQ	ATRO	Fri, Jun 22, 2007	13.41	14.02	13.09	14.02
3764	NASDAQ	ATRO	Thu, Jun 21, 2007	12.79	13.41	12.60	13.28
3763	NASDAQ	ATRO	Wed, Jun 20, 2007	13.29	13.35	12.85	12.92
3762	NASDAQ	ATRO	Tue, Jun 19, 2007	12.56	13.47	12.37	13.02
3761	NASDAQ	ATRO	Mon, Jun 18, 2007	12.65	12.65	12.42	12.53
3760	NASDAQ	ATRO	Fri, Jun 15, 2007	12.58	12.74	12.35	12.74
3759	NASDAQ	ATRO	Thu, Jun 14, 2007	12.33	12.81	12.33	12.55
3758	NASDAQ	ATRO	Wed, Jun 13, 2007	12.32	12.32	11.82	12.25
3757	NASDAQ	ATRO	Tue, Jun 12, 2007	12.19	12.24	11.56	12.20
3756	NASDAQ	ATRO	Mon, Jun 11, 2007	12.31	12.32	11.88	12.21
3755	NASDAQ	ATRO	Fri, Jun 8, 2007	12.05	12.10	11.71	12.05
3754	NASDAQ	ATRO	Thu, Jun 7, 2007	12.15	12.42	11.68	11.97
3753	NASDAQ	ATRO	Wed, Jun 6, 2007	12.43	12.64	12.08	12.32
3752	NASDAQ	ATRO	Tue, Jun 5, 2007	12.87	12.87	12.56	12.63
3751	NASDAQ	ATRO	Mon, Jun 4, 2007	12.99	12.99	12.61	12.72
3750	NASDAQ	ATRO	Fri, Jun 1, 2007	12.76	12.88	12.56	12.69
3749	NASDAQ	ATRO	Thu, May 31, 2007	12.71	12.89	12.21	12.81
3748	NASDAQ	ATRO	Wed, May 30, 2007	12.79	13.16	12.69	12.79
3747	NASDAQ	ATRO	Tue, May 29, 2007	12.74	13.20	12.67	12.80
3746	NASDAQ	ATRO	Fri, May 25, 2007	12.35	12.92	12.35	12.73
3745	NASDAQ	ATRO	Thu, May 24, 2007	12.39	12.92	12.00	12.42
3744	NASDAQ	ATRO	Wed, May 23, 2007	12.46	12.89	12.37	12.53
3743	NASDAQ	ATRO	Tue, May 22, 2007	12.49	12.95	12.26	12.60
3742	NASDAQ	ATRO	Mon, May 21, 2007	12.83	13.12	12.51	12.68
3741	NASDAQ	ATRO	Fri, May 18, 2007	12.64	13.10	12.41	12.81
3740	NASDAQ	ATRO	Thu, May 17, 2007	12.58	12.89	12.13	12.70
3739	NASDAQ	ATRO	Wed, May 16, 2007	12.76	12.79	12.56	12.57
3738	NASDAQ	ATRO	Tue, May 15, 2007	12.73	12.99	12.54	12.79
3737	NASDAQ	ATRO	Mon, May 14, 2007	12.33	12.74	12.21	12.73
3736	NASDAQ	ATRO	Fri, May 11, 2007	11.23	12.34	11.16	12.29
3735	NASDAQ	ATRO	Thu, May 10, 2007	11.92	11.99	11.30	11.73
3734	NASDAQ	ATRO	Wed, May 9, 2007	11.79	12.18	11.48	11.86
3733	NASDAQ	ATRO	Tue, May 8, 2007	10.61	11.63	10.61	11.54
3732	NASDAQ	ATRO	Mon, May 7, 2007	9.20	9.57	9.20	9.47
3731	NASDAQ	ATRO	Fri, May 4, 2007	9.14	9.36	8.81	9.25
3730	NASDAQ	ATRO	Thu, May 3, 2007	8.70	9.21	8.70	9.06
3729	NASDAQ	ATRO	Wed, May 2, 2007	8.84	8.89	8.68	8.80
3728	NASDAQ	ATRO	Tue, May 1, 2007	9.03	9.05	8.84	8.89
3727	NASDAQ	ATRO	Mon, Apr 30, 2007	8.90	9.05	8.52	9.05
3726	NASDAQ	ATRO	Fri, Apr 27, 2007	8.87	8.89	8.83	8.89
3725	NASDAQ	ATRO	Thu, Apr 26, 2007	8.47	8.89	8.40	8.70
3724	NASDAQ	ATRO	Wed, Apr 25, 2007	8.47	8.57	8.31	8.45
3723	NASDAQ	ATRO	Tue, Apr 24, 2007	8.16	8.46	8.16	8.42
3722	NASDAQ	ATRO	Mon, Apr 23, 2007	8.04	8.33	7.92	8.21
3721	NASDAQ	ATRO	Fri, Apr 20, 2007	8.30	8.33	7.98	8.21
3720	NASDAQ	ATRO	Thu, Apr 19, 2007	8.06	8.25	8.06	8.21
3719	NASDAQ	ATRO	Wed, Apr 18, 2007	8.22	8.39	8.08	8.21
3718	NASDAQ	ATRO	Tue, Apr 17, 2007	8.13	8.22	8.10	8.22
3717	NASDAQ	ATRO	Mon, Apr 16, 2007	7.88	8.22	7.88	8.17
3716	NASDAQ	ATRO	Fri, Apr 13, 2007	7.44	7.86	7.33	7.86
3715	NASDAQ	ATRO	Thu, Apr 12, 2007	7.53	7.55	7.45	7.45
3714	NASDAQ	ATRO	Wed, Apr 11, 2007	7.61	7.62	7.36	7.48
3713	NASDAQ	ATRO	Tue, Apr 10, 2007	7.67	7.78	7.65	7.67
3712	NASDAQ	ATRO	Mon, Apr 9, 2007	7.83	7.90	7.73	7.74
3711	NASDAQ	ATRO	Thu, Apr 5, 2007	7.88	7.91	7.85	7.87
3710	NASDAQ	ATRO	Wed, Apr 4, 2007	7.87	7.97	7.87	7.97
3709	NASDAQ	ATRO	Tue, Apr 3, 2007	8.15	8.15	7.89	7.89
3708	NASDAQ	ATRO	Mon, Apr 2, 2007	7.86	7.98	7.82	7.98
3707	NASDAQ	ATRO	Fri, Mar 30, 2007	7.94	8.20	7.78	8.04
3706	NASDAQ	ATRO	Thu, Mar 29, 2007	7.94	8.02	7.79	7.94
3705	NASDAQ	ATRO	Wed, Mar 28, 2007	7.85	7.96	7.76	7.85
3704	NASDAQ	ATRO	Tue, Mar 27, 2007	7.86	8.05	7.81	7.92
3703	NASDAQ	ATRO	Mon, Mar 26, 2007	7.93	8.10	7.73	7.79
3702	NASDAQ	ATRO	Fri, Mar 23, 2007	7.92	8.10	7.76	7.87
3701	NASDAQ	ATRO	Thu, Mar 22, 2007	8.02	8.08	7.98	7.98
3700	NASDAQ	ATRO	Wed, Mar 21, 2007	8.01	8.10	8.01	8.08
3699	NASDAQ	ATRO	Tue, Mar 20, 2007	8.00	8.11	7.95	8.04
3698	NASDAQ	ATRO	Mon, Mar 19, 2007	7.94	8.10	7.92	8.10
3697	NASDAQ	ATRO	Fri, Mar 16, 2007	7.97	8.10	7.95	8.00
3696	NASDAQ	ATRO	Thu, Mar 15, 2007	7.79	8.19	7.79	8.10
3695	NASDAQ	ATRO	Wed, Mar 14, 2007	7.61	7.88	7.61	7.77
3694	NASDAQ	ATRO	Tue, Mar 13, 2007	8.31	8.31	6.65	7.89
3693	NASDAQ	ATRO	Mon, Mar 12, 2007	8.36	8.63	8.29	8.59
3692	NASDAQ	ATRO	Fri, Mar 9, 2007	8.20	8.33	7.91	8.24
3691	NASDAQ	ATRO	Thu, Mar 8, 2007	8.13	8.42	8.10	8.12
3690	NASDAQ	ATRO	Wed, Mar 7, 2007	8.38	8.45	8.06	8.06
3689	NASDAQ	ATRO	Tue, Mar 6, 2007	8.47	8.52	7.99	8.42
3688	NASDAQ	ATRO	Mon, Mar 5, 2007	8.20	8.39	7.78	8.25
3687	NASDAQ	ATRO	Fri, Mar 2, 2007	8.52	8.52	8.20	8.21
3686	NASDAQ	ATRO	Thu, Mar 1, 2007	8.17	8.51	7.77	8.26
3685	NASDAQ	ATRO	Wed, Feb 28, 2007	8.32	8.63	8.15	8.17
3684	NASDAQ	ATRO	Tue, Feb 27, 2007	8.68	8.68	8.06	8.44
3683	NASDAQ	ATRO	Mon, Feb 26, 2007	9.00	9.13	8.49	8.68
3682	NASDAQ	ATRO	Fri, Feb 23, 2007	8.93	9.13	8.90	9.00
3681	NASDAQ	ATRO	Thu, Feb 22, 2007	9.59	9.59	8.69	8.89
3680	NASDAQ	ATRO	Wed, Feb 21, 2007	9.59	10.01	9.36	9.63
3679	NASDAQ	ATRO	Tue, Feb 20, 2007	9.34	9.63	9.34	9.56
3678	NASDAQ	ATRO	Fri, Feb 16, 2007	9.08	9.41	9.08	9.41
3677	NASDAQ	ATRO	Thu, Feb 15, 2007	9.47	9.59	8.99	9.07
3676	NASDAQ	ATRO	Wed, Feb 14, 2007	9.47	9.59	9.41	9.41
3675	NASDAQ	ATRO	Tue, Feb 13, 2007	9.58	9.61	9.38	9.45
3674	NASDAQ	ATRO	Mon, Feb 12, 2007	9.07	9.54	8.94	9.42
3673	NASDAQ	ATRO	Fri, Feb 9, 2007	8.57	9.00	8.57	8.96
3672	NASDAQ	ATRO	Thu, Feb 8, 2007	8.47	8.63	8.45	8.63
3671	NASDAQ	ATRO	Wed, Feb 7, 2007	8.47	8.53	8.19	8.53
3670	NASDAQ	ATRO	Tue, Feb 6, 2007	8.23	8.44	8.23	8.23
3669	NASDAQ	ATRO	Mon, Feb 5, 2007	8.68	8.87	8.20	8.20
3668	NASDAQ	ATRO	Fri, Feb 2, 2007	8.31	8.61	8.26	8.59
3667	NASDAQ	ATRO	Thu, Feb 1, 2007	8.49	8.55	8.09	8.33
3666	NASDAQ	ATRO	Wed, Jan 31, 2007	8.41	8.47	8.11	8.45
3665	NASDAQ	ATRO	Tue, Jan 30, 2007	8.22	8.42	8.04	8.37
3664	NASDAQ	ATRO	Mon, Jan 29, 2007	8.00	8.21	7.72	8.17
3663	NASDAQ	ATRO	Fri, Jan 26, 2007	7.92	8.13	7.92	8.13
3662	NASDAQ	ATRO	Thu, Jan 25, 2007	7.99	8.13	7.88	7.92
3661	NASDAQ	ATRO	Wed, Jan 24, 2007	8.19	8.20	7.95	7.99
3660	NASDAQ	ATRO	Tue, Jan 23, 2007	8.11	8.13	7.92	7.99
3659	NASDAQ	ATRO	Mon, Jan 22, 2007	8.42	8.47	7.96	8.04
3658	NASDAQ	ATRO	Fri, Jan 19, 2007	8.57	8.57	8.23	8.40
3657	NASDAQ	ATRO	Thu, Jan 18, 2007	8.31	8.57	8.23	8.42
3656	NASDAQ	ATRO	Wed, Jan 17, 2007	8.37	8.39	7.67	8.31
3655	NASDAQ	ATRO	Tue, Jan 16, 2007	8.53	8.61	8.49	8.49
3654	NASDAQ	ATRO	Fri, Jan 12, 2007	8.45	8.67	8.45	8.47
3653	NASDAQ	ATRO	Thu, Jan 11, 2007	8.21	8.49	8.21	8.49
3652	NASDAQ	ATRO	Wed, Jan 10, 2007	8.09	8.20	7.93	8.14
3651	NASDAQ	ATRO	Tue, Jan 9, 2007	7.99	8.21	7.97	8.07
3650	NASDAQ	ATRO	Mon, Jan 8, 2007	8.10	8.10	7.72	7.91
3649	NASDAQ	ATRO	Fri, Jan 5, 2007	7.99	8.08	7.94	8.03
3648	NASDAQ	ATRO	Thu, Jan 4, 2007	7.76	8.07	7.74	7.95
3647	NASDAQ	ATRO	Wed, Jan 3, 2007	7.74	7.79	7.72	7.73
3646	NASDAQ	ATRO	Fri, Dec 29, 2006	7.81	7.84	7.76	7.82
3645	NASDAQ	ATRO	Thu, Dec 28, 2006	7.81	7.87	7.71	7.73
3644	NASDAQ	ATRO	Wed, Dec 27, 2006	7.65	7.85	7.65	7.79
3643	NASDAQ	ATRO	Tue, Dec 26, 2006	7.63	7.65	7.58	7.65
3642	NASDAQ	ATRO	Fri, Dec 22, 2006	7.53	7.66	7.49	7.56
3641	NASDAQ	ATRO	Thu, Dec 21, 2006	7.63	7.63	7.49	7.52
3640	NASDAQ	ATRO	Wed, Dec 20, 2006	7.53	7.73	7.38	7.56
3639	NASDAQ	ATRO	Tue, Dec 19, 2006	7.45	7.75	7.45	7.60
3638	NASDAQ	ATRO	Mon, Dec 18, 2006	7.47	7.85	7.47	7.70
3637	NASDAQ	ATRO	Fri, Dec 15, 2006	7.76	7.89	7.53	7.58
3636	NASDAQ	ATRO	Thu, Dec 14, 2006	7.63	7.90	7.63	7.76
3635	NASDAQ	ATRO	Wed, Dec 13, 2006	7.88	8.00	7.67	7.70
3634	NASDAQ	ATRO	Tue, Dec 12, 2006	7.86	7.96	7.86	7.93
3633	NASDAQ	ATRO	Mon, Dec 11, 2006	7.67	7.96	7.67	7.91
3632	NASDAQ	ATRO	Fri, Dec 8, 2006	7.76	7.91	7.63	7.68
3631	NASDAQ	ATRO	Thu, Dec 7, 2006	7.75	7.92	7.72	7.76
3630	NASDAQ	ATRO	Wed, Dec 6, 2006	7.97	7.97	7.67	7.72
3629	NASDAQ	ATRO	Tue, Dec 5, 2006	8.00	8.00	7.87	7.92
3628	NASDAQ	ATRO	Mon, Dec 4, 2006	7.97	8.06	7.84	7.99
3627	NASDAQ	ATRO	Fri, Dec 1, 2006	7.74	7.94	7.74	7.93
3626	NASDAQ	ATRO	Thu, Nov 30, 2006	7.94	7.94	7.79	7.90
3625	NASDAQ	ATRO	Wed, Nov 29, 2006	7.63	7.85	7.35	7.77
3624	NASDAQ	ATRO	Tue, Nov 28, 2006	7.26	7.63	7.23	7.59
3623	NASDAQ	ATRO	Mon, Nov 27, 2006	7.72	7.72	7.27	7.42
3622	NASDAQ	ATRO	Fri, Nov 24, 2006	7.60	7.66	7.60	7.66
3621	NASDAQ	ATRO	Wed, Nov 22, 2006	7.53	7.68	7.53	7.60
3620	NASDAQ	ATRO	Tue, Nov 21, 2006	7.33	7.76	7.26	7.54
3619	NASDAQ	ATRO	Mon, Nov 20, 2006	7.47	7.53	7.31	7.39
3618	NASDAQ	ATRO	Fri, Nov 17, 2006	7.53	7.53	7.36	7.42
3617	NASDAQ	ATRO	Thu, Nov 16, 2006	7.65	7.87	7.58	7.63
3616	NASDAQ	ATRO	Wed, Nov 15, 2006	7.88	7.98	7.58	7.61
3615	NASDAQ	ATRO	Tue, Nov 14, 2006	7.47	7.82	7.47	7.72
3614	NASDAQ	ATRO	Mon, Nov 13, 2006	7.33	7.74	7.12	7.54
3613	NASDAQ	ATRO	Fri, Nov 10, 2006	7.69	7.69	7.30	7.31
3612	NASDAQ	ATRO	Thu, Nov 9, 2006	7.99	8.21	7.56	7.75
3611	NASDAQ	ATRO	Wed, Nov 8, 2006	7.93	7.93	7.56	7.65
3610	NASDAQ	ATRO	Tue, Nov 7, 2006	7.92	7.92	7.78	7.89
3609	NASDAQ	ATRO	Mon, Nov 6, 2006	7.90	7.94	7.84	7.91
3608	NASDAQ	ATRO	Fri, Nov 3, 2006	7.88	7.97	7.76	7.89
3607	NASDAQ	ATRO	Thu, Nov 2, 2006	7.79	8.15	7.79	7.84
3606	NASDAQ	ATRO	Wed, Nov 1, 2006	7.91	7.97	7.74	7.97
3605	NASDAQ	ATRO	Tue, Oct 31, 2006	7.99	7.99	7.75	7.98
3604	NASDAQ	ATRO	Mon, Oct 30, 2006	7.88	8.18	7.77	7.84
3603	NASDAQ	ATRO	Fri, Oct 27, 2006	7.94	8.22	7.76	7.95
3602	NASDAQ	ATRO	Thu, Oct 26, 2006	7.81	8.05	7.65	7.87
3601	NASDAQ	ATRO	Wed, Oct 25, 2006	7.83	7.83	7.67	7.83
3600	NASDAQ	ATRO	Tue, Oct 24, 2006	7.85	7.85	7.72	7.81
3599	NASDAQ	ATRO	Mon, Oct 23, 2006	7.75	7.91	7.69	7.84
3598	NASDAQ	ATRO	Fri, Oct 20, 2006	7.65	7.75	7.54	7.74
3597	NASDAQ	ATRO	Thu, Oct 19, 2006	7.76	7.78	7.71	7.71
3596	NASDAQ	ATRO	Wed, Oct 18, 2006	7.74	7.74	7.16	7.63
3595	NASDAQ	ATRO	Tue, Oct 17, 2006	7.76	7.97	7.74	7.74
3594	NASDAQ	ATRO	Mon, Oct 16, 2006	7.34	7.76	7.32	7.76
3593	NASDAQ	ATRO	Fri, Oct 13, 2006	7.24	7.39	7.01	7.33
3592	NASDAQ	ATRO	Thu, Oct 12, 2006	7.24	7.39	7.13	7.21
3591	NASDAQ	ATRO	Wed, Oct 11, 2006	7.34	7.34	7.07	7.16
3590	NASDAQ	ATRO	Tue, Oct 10, 2006	7.31	7.42	7.22	7.30
3589	NASDAQ	ATRO	Mon, Oct 9, 2006	7.42	7.42	7.27	7.32
3588	NASDAQ	ATRO	Fri, Oct 6, 2006	7.55	7.55	6.87	7.31
3587	NASDAQ	ATRO	Thu, Oct 5, 2006	6.80	7.19	6.80	7.15
3586	NASDAQ	ATRO	Wed, Oct 4, 2006	6.56	6.95	6.52	6.95
3585	NASDAQ	ATRO	Tue, Oct 3, 2006	6.94	6.94	6.42	6.58
3584	NASDAQ	ATRO	Mon, Oct 2, 2006	7.26	7.51	6.80	6.87
3583	NASDAQ	ATRO	Fri, Sep 29, 2006	7.00	7.21	6.98	7.19
3582	NASDAQ	ATRO	Thu, Sep 28, 2006	7.22	7.22	6.95	7.14
3581	NASDAQ	ATRO	Wed, Sep 27, 2006	7.08	7.22	7.08	7.15
3580	NASDAQ	ATRO	Tue, Sep 26, 2006	7.11	7.26	6.95	7.26
3579	NASDAQ	ATRO	Mon, Sep 25, 2006	7.12	7.21	6.94	7.17
3578	NASDAQ	ATRO	Fri, Sep 22, 2006	7.12	7.12	7.11	7.11
3577	NASDAQ	ATRO	Thu, Sep 21, 2006	7.30	7.30	6.88	7.11
3576	NASDAQ	ATRO	Wed, Sep 20, 2006	7.53	7.53	7.20	7.35
3575	NASDAQ	ATRO	Tue, Sep 19, 2006	7.31	7.62	7.31	7.42
3574	NASDAQ	ATRO	Mon, Sep 18, 2006	7.29	7.41	7.28	7.33
3573	NASDAQ	ATRO	Fri, Sep 15, 2006	7.53	7.53	7.33	7.44
3572	NASDAQ	ATRO	Thu, Sep 14, 2006	7.03	7.44	7.01	7.35
3571	NASDAQ	ATRO	Wed, Sep 13, 2006	7.14	7.45	6.98	7.17
3570	NASDAQ	ATRO	Tue, Sep 12, 2006	6.99	7.31	6.72	7.19
3569	NASDAQ	ATRO	Mon, Sep 11, 2006	7.37	7.37	7.03	7.03
3568	NASDAQ	ATRO	Fri, Sep 8, 2006	7.36	7.37	7.19	7.28
3567	NASDAQ	ATRO	Thu, Sep 7, 2006	7.26	7.35	7.19	7.26
3566	NASDAQ	ATRO	Wed, Sep 6, 2006	7.66	7.98	7.24	7.30
3565	NASDAQ	ATRO	Tue, Sep 5, 2006	7.47	7.59	7.44	7.56
3564	NASDAQ	ATRO	Fri, Sep 1, 2006	7.42	7.62	7.30	7.44
3563	NASDAQ	ATRO	Thu, Aug 31, 2006	7.17	7.31	7.01	7.28
3562	NASDAQ	ATRO	Wed, Aug 30, 2006	7.00	7.40	7.00	7.21
3561	NASDAQ	ATRO	Tue, Aug 29, 2006	6.73	7.00	6.73	7.00
3560	NASDAQ	ATRO	Mon, Aug 28, 2006	6.62	6.81	6.62	6.73
3559	NASDAQ	ATRO	Fri, Aug 25, 2006	6.68	6.90	6.49	6.68
3558	NASDAQ	ATRO	Thu, Aug 24, 2006	6.80	6.80	6.49	6.66
3557	NASDAQ	ATRO	Wed, Aug 23, 2006	6.96	7.02	6.84	6.92
3556	NASDAQ	ATRO	Tue, Aug 22, 2006	7.07	7.08	6.86	7.03
3555	NASDAQ	ATRO	Mon, Aug 21, 2006	7.07	7.08	6.85	6.87
3554	NASDAQ	ATRO	Fri, Aug 18, 2006	7.13	7.13	6.91	7.07
3553	NASDAQ	ATRO	Thu, Aug 17, 2006	6.99	7.19	6.96	7.19
3552	NASDAQ	ATRO	Wed, Aug 16, 2006	7.14	7.16	6.68	7.03
3551	NASDAQ	ATRO	Tue, Aug 15, 2006	6.62	7.07	6.55	7.05
3550	NASDAQ	ATRO	Mon, Aug 14, 2006	6.79	6.85	6.44	6.45
3549	NASDAQ	ATRO	Fri, Aug 11, 2006	6.53	6.61	6.39	6.58
3548	NASDAQ	ATRO	Thu, Aug 10, 2006	6.47	6.57	6.44	6.51
3547	NASDAQ	ATRO	Wed, Aug 9, 2006	6.55	6.59	6.34	6.44
3546	NASDAQ	ATRO	Tue, Aug 8, 2006	6.40	6.53	6.40	6.51
3545	NASDAQ	ATRO	Mon, Aug 7, 2006	6.47	6.60	6.42	6.53
3544	NASDAQ	ATRO	Fri, Aug 4, 2006	6.54	6.79	6.42	6.61
3543	NASDAQ	ATRO	Thu, Aug 3, 2006	6.51	6.82	6.39	6.56
3542	NASDAQ	ATRO	Wed, Aug 2, 2006	5.80	5.96	5.59	5.94
3541	NASDAQ	ATRO	Tue, Aug 1, 2006	5.88	5.98	5.88	5.98
3540	NASDAQ	ATRO	Mon, Jul 31, 2006	5.80	6.01	5.80	6.01
3539	NASDAQ	ATRO	Fri, Jul 28, 2006	5.96	6.13	5.80	6.09
3538	NASDAQ	ATRO	Thu, Jul 27, 2006	6.06	6.16	5.93	5.96
3537	NASDAQ	ATRO	Wed, Jul 26, 2006	6.15	6.15	5.94	5.98
3536	NASDAQ	ATRO	Tue, Jul 25, 2006	6.15	6.15	5.94	6.05
3535	NASDAQ	ATRO	Mon, Jul 24, 2006	6.00	6.25	5.44	6.05
3534	NASDAQ	ATRO	Fri, Jul 21, 2006	6.12	6.21	6.07	6.11
3533	NASDAQ	ATRO	Thu, Jul 20, 2006	6.05	6.21	5.91	6.21
3532	NASDAQ	ATRO	Wed, Jul 19, 2006	5.94	6.13	5.94	6.05
3531	NASDAQ	ATRO	Tue, Jul 18, 2006	6.00	6.01	5.94	5.98
3530	NASDAQ	ATRO	Mon, Jul 17, 2006	5.66	6.00	5.66	6.00
3529	NASDAQ	ATRO	Fri, Jul 14, 2006	5.82	5.99	5.82	5.96
3528	NASDAQ	ATRO	Thu, Jul 13, 2006	5.86	6.01	5.54	5.94
3527	NASDAQ	ATRO	Wed, Jul 12, 2006	5.93	5.93	5.72	5.78
3526	NASDAQ	ATRO	Tue, Jul 11, 2006	5.83	5.91	5.62	5.91
3525	NASDAQ	ATRO	Mon, Jul 10, 2006	5.83	6.01	5.83	5.84
3524	NASDAQ	ATRO	Fri, Jul 7, 2006	6.23	6.23	6.10	6.10
3523	NASDAQ	ATRO	Thu, Jul 6, 2006	6.24	6.24	6.13	6.13
3522	NASDAQ	ATRO	Wed, Jul 5, 2006	5.74	6.25	5.74	6.10
3521	NASDAQ	ATRO	Mon, Jul 3, 2006	6.19	6.19	5.88	5.88
3520	NASDAQ	ATRO	Fri, Jun 30, 2006	5.25	6.12	5.25	6.11
3519	NASDAQ	ATRO	Thu, Jun 29, 2006	5.66	5.78	5.56	5.62
3518	NASDAQ	ATRO	Wed, Jun 28, 2006	5.46	5.48	5.25	5.47
3517	NASDAQ	ATRO	Tue, Jun 27, 2006	5.33	5.41	5.28	5.30
3516	NASDAQ	ATRO	Mon, Jun 26, 2006	5.31	5.48	5.16	5.33
3515	NASDAQ	ATRO	Fri, Jun 23, 2006	5.56	5.63	5.07	5.37
3514	NASDAQ	ATRO	Thu, Jun 22, 2006	5.45	5.59	5.36	5.59
3513	NASDAQ	ATRO	Wed, Jun 21, 2006	5.41	5.58	5.05	5.57
3512	NASDAQ	ATRO	Tue, Jun 20, 2006	5.52	5.52	5.37	5.46
3511	NASDAQ	ATRO	Mon, Jun 19, 2006	5.48	5.86	5.34	5.48
3510	NASDAQ	ATRO	Fri, Jun 16, 2006	5.54	5.69	5.47	5.57
3509	NASDAQ	ATRO	Thu, Jun 15, 2006	5.82	5.84	5.48	5.73
3508	NASDAQ	ATRO	Wed, Jun 14, 2006	5.89	5.98	5.54	5.70
3507	NASDAQ	ATRO	Tue, Jun 13, 2006	6.39	6.41	6.00	6.00
3506	NASDAQ	ATRO	Mon, Jun 12, 2006	6.35	6.37	6.13	6.37
3505	NASDAQ	ATRO	Fri, Jun 9, 2006	6.16	6.39	6.03	6.39
3504	NASDAQ	ATRO	Thu, Jun 8, 2006	6.39	6.39	6.30	6.31
3503	NASDAQ	ATRO	Wed, Jun 7, 2006	6.21	6.51	6.21	6.51
3502	NASDAQ	ATRO	Tue, Jun 6, 2006	6.51	6.51	6.40	6.40
3501	NASDAQ	ATRO	Mon, Jun 5, 2006	6.49	6.51	6.39	6.51
3500	NASDAQ	ATRO	Fri, Jun 2, 2006	6.35	6.47	6.35	6.39
3499	NASDAQ	ATRO	Thu, Jun 1, 2006	6.41	6.41	6.20	6.39
3498	NASDAQ	ATRO	Wed, May 31, 2006	6.25	6.42	6.17	6.37
3497	NASDAQ	ATRO	Tue, May 30, 2006	5.95	6.39	5.02	6.25
3496	NASDAQ	ATRO	Fri, May 26, 2006	6.31	6.51	6.31	6.44
3495	NASDAQ	ATRO	Thu, May 25, 2006	6.62	6.62	6.42	6.44
3494	NASDAQ	ATRO	Wed, May 24, 2006	6.39	6.62	6.38	6.62
3493	NASDAQ	ATRO	Tue, May 23, 2006	6.25	6.67	6.24	6.52
3492	NASDAQ	ATRO	Mon, May 22, 2006	6.42	6.51	6.30	6.34
3491	NASDAQ	ATRO	Fri, May 19, 2006	6.56	6.58	6.42	6.53
3490	NASDAQ	ATRO	Thu, May 18, 2006	6.73	6.73	6.36	6.67
3489	NASDAQ	ATRO	Wed, May 17, 2006	6.35	6.77	6.35	6.64
3488	NASDAQ	ATRO	Tue, May 16, 2006	6.69	6.77	6.41	6.64
3487	NASDAQ	ATRO	Mon, May 15, 2006	7.00	7.00	6.69	6.69
3486	NASDAQ	ATRO	Fri, May 12, 2006	6.96	6.96	6.85	6.87
3485	NASDAQ	ATRO	Thu, May 11, 2006	7.09	7.41	6.62	6.85
3484	NASDAQ	ATRO	Wed, May 10, 2006	6.44	6.85	6.44	6.79
3483	NASDAQ	ATRO	Tue, May 9, 2006	6.63	6.63	6.55	6.55
3482	NASDAQ	ATRO	Mon, May 8, 2006	6.60	6.60	6.40	6.53
3481	NASDAQ	ATRO	Fri, May 5, 2006	6.40	6.61	6.34	6.47
3480	NASDAQ	ATRO	Thu, May 4, 2006	6.57	6.59	6.27	6.53
3479	NASDAQ	ATRO	Wed, May 3, 2006	6.46	6.62	6.24	6.46
3478	NASDAQ	ATRO	Tue, May 2, 2006	6.31	6.56	6.17	6.46
3477	NASDAQ	ATRO	Mon, May 1, 2006	6.47	6.54	6.38	6.42
3476	NASDAQ	ATRO	Fri, Apr 28, 2006	6.77	6.77	6.32	6.60
3475	NASDAQ	ATRO	Thu, Apr 27, 2006	6.50	6.52	6.48	6.50
3474	NASDAQ	ATRO	Wed, Apr 26, 2006	6.44	6.61	6.39	6.51
3473	NASDAQ	ATRO	Tue, Apr 25, 2006	6.61	6.80	6.59	6.59
3472	NASDAQ	ATRO	Mon, Apr 24, 2006	6.63	6.74	6.43	6.59
3471	NASDAQ	ATRO	Fri, Apr 21, 2006	6.55	6.83	6.51	6.52
3470	NASDAQ	ATRO	Thu, Apr 20, 2006	6.05	6.62	5.95	6.55
3469	NASDAQ	ATRO	Wed, Apr 19, 2006	5.96	6.36	5.96	6.31
3468	NASDAQ	ATRO	Tue, Apr 18, 2006	5.98	6.03	5.96	6.01
3467	NASDAQ	ATRO	Mon, Apr 17, 2006	5.96	6.10	5.96	6.02
3466	NASDAQ	ATRO	Thu, Apr 13, 2006	6.16	6.16	5.95	6.08
3465	NASDAQ	ATRO	Wed, Apr 12, 2006	6.05	6.14	6.02	6.09
3464	NASDAQ	ATRO	Tue, Apr 11, 2006	6.18	6.18	5.96	6.00
3463	NASDAQ	ATRO	Mon, Apr 10, 2006	6.27	6.27	5.92	5.98
3462	NASDAQ	ATRO	Fri, Apr 7, 2006	6.25	6.25	5.99	6.16
3461	NASDAQ	ATRO	Thu, Apr 6, 2006	6.28	6.28	6.16	6.23
3460	NASDAQ	ATRO	Wed, Apr 5, 2006	5.85	6.27	5.85	6.27
3459	NASDAQ	ATRO	Tue, Apr 4, 2006	5.96	6.17	5.79	6.03
3458	NASDAQ	ATRO	Mon, Apr 3, 2006	6.16	6.24	5.96	5.96
3457	NASDAQ	ATRO	Fri, Mar 31, 2006	5.89	6.16	5.89	6.16
3456	NASDAQ	ATRO	Thu, Mar 30, 2006	5.89	6.00	5.89	6.00
3455	NASDAQ	ATRO	Tue, Mar 28, 2006	6.12	6.12	5.94	6.01
3454	NASDAQ	ATRO	Mon, Mar 27, 2006	6.05	6.05	5.89	5.95
3453	NASDAQ	ATRO	Fri, Mar 24, 2006	6.03	6.21	6.03	6.12
3452	NASDAQ	ATRO	Thu, Mar 23, 2006	6.04	6.21	5.89	6.07
3451	NASDAQ	ATRO	Wed, Mar 22, 2006	6.21	6.21	5.91	6.02
3450	NASDAQ	ATRO	Tue, Mar 21, 2006	6.12	6.12	5.95	6.07
3449	NASDAQ	ATRO	Mon, Mar 20, 2006	5.94	6.05	5.89	5.99
3448	NASDAQ	ATRO	Fri, Mar 17, 2006	5.99	6.02	5.87	5.94
3447	NASDAQ	ATRO	Thu, Mar 16, 2006	5.93	6.04	5.75	5.97
3446	NASDAQ	ATRO	Wed, Mar 15, 2006	6.11	6.11	5.74	5.97
3445	NASDAQ	ATRO	Tue, Mar 14, 2006	5.94	6.05	5.80	5.92
3444	NASDAQ	ATRO	Mon, Mar 13, 2006	6.12	6.12	5.89	5.89
3443	NASDAQ	ATRO	Fri, Mar 10, 2006	6.21	6.21	6.03	6.12
3442	NASDAQ	ATRO	Thu, Mar 9, 2006	6.13	6.27	6.03	6.10
3441	NASDAQ	ATRO	Wed, Mar 8, 2006	6.00	6.11	5.97	6.10
3440	NASDAQ	ATRO	Tue, Mar 7, 2006	6.36	6.36	6.01	6.12
3439	NASDAQ	ATRO	Mon, Mar 6, 2006	6.28	6.39	6.07	6.12
3438	NASDAQ	ATRO	Fri, Mar 3, 2006	6.13	6.28	6.13	6.18
3437	NASDAQ	ATRO	Thu, Mar 2, 2006	6.19	6.19	6.06	6.06
3436	NASDAQ	ATRO	Wed, Mar 1, 2006	6.11	6.12	6.03	6.09
3435	NASDAQ	ATRO	Tue, Feb 28, 2006	6.23	6.23	5.95	6.06
3434	NASDAQ	ATRO	Mon, Feb 27, 2006	6.26	6.26	5.99	6.23
3433	NASDAQ	ATRO	Fri, Feb 24, 2006	6.27	6.27	5.95	6.19
3432	NASDAQ	ATRO	Thu, Feb 23, 2006	6.16	6.27	6.07	6.24
3431	NASDAQ	ATRO	Wed, Feb 22, 2006	6.16	6.16	6.05	6.12
3430	NASDAQ	ATRO	Tue, Feb 21, 2006	6.16	6.16	6.05	6.16
3429	NASDAQ	ATRO	Fri, Feb 17, 2006	6.16	6.16	5.94	6.05
3428	NASDAQ	ATRO	Thu, Feb 16, 2006	5.71	6.16	5.71	6.06
3427	NASDAQ	ATRO	Wed, Feb 15, 2006	5.37	5.68	5.24	5.67
3426	NASDAQ	ATRO	Tue, Feb 14, 2006	5.37	5.37	5.10	5.30
3425	NASDAQ	ATRO	Mon, Feb 13, 2006	5.63	5.63	5.15	5.37
3424	NASDAQ	ATRO	Fri, Feb 10, 2006	5.77	5.78	5.42	5.54
3423	NASDAQ	ATRO	Thu, Feb 9, 2006	5.71	6.10	5.11	5.68
3422	NASDAQ	ATRO	Wed, Feb 8, 2006	5.41	5.65	5.29	5.59
3421	NASDAQ	ATRO	Tue, Feb 7, 2006	5.27	5.41	5.11	5.41
3420	NASDAQ	ATRO	Mon, Feb 6, 2006	5.16	5.28	5.09	5.10
3419	NASDAQ	ATRO	Fri, Feb 3, 2006	5.03	5.16	4.89	5.15
3418	NASDAQ	ATRO	Thu, Feb 2, 2006	5.19	5.25	4.76	4.95
3417	NASDAQ	ATRO	Wed, Feb 1, 2006	4.89	5.10	4.79	5.10
3416	NASDAQ	ATRO	Tue, Jan 31, 2006	5.25	5.34	4.94	5.00
3415	NASDAQ	ATRO	Mon, Jan 30, 2006	5.21	5.21	4.89	5.07
3414	NASDAQ	ATRO	Fri, Jan 27, 2006	5.28	5.30	5.03	5.13
3413	NASDAQ	ATRO	Thu, Jan 26, 2006	4.62	5.39	4.62	5.27
3412	NASDAQ	ATRO	Wed, Jan 25, 2006	4.79	4.79	4.61	4.63
3411	NASDAQ	ATRO	Tue, Jan 24, 2006	4.70	4.73	4.68	4.68
3410	NASDAQ	ATRO	Mon, Jan 23, 2006	4.82	4.82	4.66	4.68
3409	NASDAQ	ATRO	Fri, Jan 20, 2006	4.70	4.75	4.66	4.74
3408	NASDAQ	ATRO	Thu, Jan 19, 2006	4.79	4.83	4.61	4.79
3407	NASDAQ	ATRO	Wed, Jan 18, 2006	4.57	4.84	4.57	4.79
3406	NASDAQ	ATRO	Tue, Jan 17, 2006	4.74	4.74	4.68	4.68
3405	NASDAQ	ATRO	Fri, Jan 13, 2006	4.84	4.87	4.55	4.70
3404	NASDAQ	ATRO	Thu, Jan 12, 2006	4.67	4.93	4.66	4.93
3403	NASDAQ	ATRO	Wed, Jan 11, 2006	4.69	4.86	4.68	4.74
3402	NASDAQ	ATRO	Tue, Jan 10, 2006	4.79	4.80	4.60	4.63
3401	NASDAQ	ATRO	Mon, Jan 9, 2006	4.79	4.84	4.63	4.77
3400	NASDAQ	ATRO	Fri, Jan 6, 2006	4.77	4.89	4.77	4.79
3399	NASDAQ	ATRO	Thu, Jan 5, 2006	4.81	4.87	4.73	4.80
3398	NASDAQ	ATRO	Wed, Jan 4, 2006	4.73	4.88	4.73	4.88
3397	NASDAQ	ATRO	Tue, Jan 3, 2006	4.84	4.84	4.53	4.73
3396	NASDAQ	ATRO	Fri, Dec 30, 2005	4.80	4.91	4.80	4.91
3395	NASDAQ	ATRO	Thu, Dec 29, 2005	4.84	4.84	4.64	4.64
3394	NASDAQ	ATRO	Wed, Dec 28, 2005	4.66	4.78	4.55	4.61
3393	NASDAQ	ATRO	Tue, Dec 27, 2005	4.76	4.79	4.57	4.66
3392	NASDAQ	ATRO	Fri, Dec 23, 2005	4.65	4.68	4.65	4.68
3391	NASDAQ	ATRO	Thu, Dec 22, 2005	4.74	4.74	4.53	4.53
3390	NASDAQ	ATRO	Wed, Dec 21, 2005	4.52	4.75	4.52	4.73
3389	NASDAQ	ATRO	Tue, Dec 20, 2005	4.51	4.51	4.51	4.51
3388	NASDAQ	ATRO	Mon, Dec 19, 2005	4.43	4.47	4.38	4.47
3387	NASDAQ	ATRO	Fri, Dec 16, 2005	4.54	4.54	4.45	4.54
3386	NASDAQ	ATRO	Thu, Dec 15, 2005	4.55	4.55	4.54	4.54
3385	NASDAQ	ATRO	Wed, Dec 14, 2005	4.45	4.60	4.34	4.56
3384	NASDAQ	ATRO	Tue, Dec 13, 2005	4.61	4.61	4.49	4.49
3383	NASDAQ	ATRO	Mon, Dec 12, 2005	4.52	4.66	4.49	4.66
3382	NASDAQ	ATRO	Fri, Dec 9, 2005	4.56	4.75	4.50	4.75
3381	NASDAQ	ATRO	Thu, Dec 8, 2005	4.55	4.60	4.34	4.47
3380	NASDAQ	ATRO	Wed, Dec 7, 2005	4.50	4.53	4.37	4.44
3379	NASDAQ	ATRO	Tue, Dec 6, 2005	4.51	4.56	4.50	4.56
3378	NASDAQ	ATRO	Mon, Dec 5, 2005	4.54	4.60	4.34	4.51
3377	NASDAQ	ATRO	Fri, Dec 2, 2005	4.65	4.72	4.52	4.68
3376	NASDAQ	ATRO	Thu, Dec 1, 2005	4.79	4.79	4.49	4.74
3375	NASDAQ	ATRO	Wed, Nov 30, 2005	4.84	4.84	4.67	4.77
3374	NASDAQ	ATRO	Tue, Nov 29, 2005	4.68	4.84	4.68	4.84
3373	NASDAQ	ATRO	Mon, Nov 28, 2005	4.84	4.84	4.52	4.68
3372	NASDAQ	ATRO	Fri, Nov 25, 2005	4.83	4.83	4.43	4.68
3371	NASDAQ	ATRO	Wed, Nov 23, 2005	4.61	4.91	4.61	4.72
3370	NASDAQ	ATRO	Tue, Nov 22, 2005	4.90	4.92	4.57	4.78
3369	NASDAQ	ATRO	Mon, Nov 21, 2005	4.39	5.02	4.36	5.00
3368	NASDAQ	ATRO	Fri, Nov 18, 2005	4.27	4.38	4.27	4.38
3367	NASDAQ	ATRO	Thu, Nov 17, 2005	4.34	4.34	4.27	4.32
3366	NASDAQ	ATRO	Wed, Nov 16, 2005	4.28	4.46	4.27	4.36
3365	NASDAQ	ATRO	Tue, Nov 15, 2005	4.41	4.52	4.41	4.41
3364	NASDAQ	ATRO	Mon, Nov 14, 2005	4.38	4.38	4.38	4.38
3363	NASDAQ	ATRO	Fri, Nov 11, 2005	4.38	4.47	4.38	4.46
3362	NASDAQ	ATRO	Thu, Nov 10, 2005	4.53	4.53	4.27	4.48
3361	NASDAQ	ATRO	Wed, Nov 9, 2005	4.52	4.52	4.42	4.42
3360	NASDAQ	ATRO	Tue, Nov 8, 2005	4.52	4.55	4.29	4.40
3359	NASDAQ	ATRO	Mon, Nov 7, 2005	4.27	4.35	4.27	4.29
3358	NASDAQ	ATRO	Fri, Nov 4, 2005	4.27	4.38	4.27	4.36
3357	NASDAQ	ATRO	Thu, Nov 3, 2005	4.22	4.47	4.22	4.45
3356	NASDAQ	ATRO	Wed, Nov 2, 2005	4.51	4.51	4.20	4.31
3355	NASDAQ	ATRO	Tue, Nov 1, 2005	4.16	4.40	4.16	4.35
3354	NASDAQ	ATRO	Mon, Oct 31, 2005	4.21	4.33	4.21	4.22
3353	NASDAQ	ATRO	Fri, Oct 28, 2005	4.46	4.46	4.38	4.38
3352	NASDAQ	ATRO	Thu, Oct 27, 2005	4.46	4.49	4.39	4.39
3351	NASDAQ	ATRO	Wed, Oct 26, 2005	4.42	4.57	4.38	4.49
3350	NASDAQ	ATRO	Tue, Oct 25, 2005	4.49	4.57	4.35	4.57
3349	NASDAQ	ATRO	Mon, Oct 24, 2005	4.57	4.57	4.33	4.50
3348	NASDAQ	ATRO	Fri, Oct 21, 2005	4.16	4.57	4.16	4.39
3347	NASDAQ	ATRO	Thu, Oct 20, 2005	4.35	4.39	4.21	4.34
3346	NASDAQ	ATRO	Wed, Oct 19, 2005	4.26	4.40	4.14	4.34
3345	NASDAQ	ATRO	Tue, Oct 18, 2005	4.50	4.50	4.44	4.44
3344	NASDAQ	ATRO	Mon, Oct 17, 2005	4.16	4.50	4.16	4.50
3343	NASDAQ	ATRO	Fri, Oct 14, 2005	4.29	4.37	4.26	4.26
3342	NASDAQ	ATRO	Thu, Oct 13, 2005	4.14	4.42	4.14	4.40
3341	NASDAQ	ATRO	Wed, Oct 12, 2005	4.15	4.30	4.15	4.30
3340	NASDAQ	ATRO	Tue, Oct 11, 2005	4.16	4.29	4.14	4.29
3339	NASDAQ	ATRO	Mon, Oct 10, 2005	4.16	4.30	4.15	4.30
3338	NASDAQ	ATRO	Fri, Oct 7, 2005	4.16	4.33	4.14	4.22
3337	NASDAQ	ATRO	Thu, Oct 6, 2005	4.28	4.28	4.18	4.22
3336	NASDAQ	ATRO	Wed, Oct 5, 2005	4.37	4.54	4.18	4.40
3335	NASDAQ	ATRO	Tue, Oct 4, 2005	4.52	4.57	4.47	4.47
3334	NASDAQ	ATRO	Mon, Oct 3, 2005	4.38	4.52	4.36	4.52
3333	NASDAQ	ATRO	Fri, Sep 30, 2005	4.41	4.41	4.41	4.41
3332	NASDAQ	ATRO	Thu, Sep 29, 2005	4.38	4.38	4.38	4.38
3331	NASDAQ	ATRO	Wed, Sep 28, 2005	4.34	4.45	4.29	4.45
3330	NASDAQ	ATRO	Tue, Sep 27, 2005	4.14	4.29	4.14	4.27
3329	NASDAQ	ATRO	Mon, Sep 26, 2005	4.31	4.31	4.19	4.19
3328	NASDAQ	ATRO	Fri, Sep 23, 2005	4.14	4.22	4.14	4.21
3327	NASDAQ	ATRO	Thu, Sep 22, 2005	4.26	4.26	4.16	4.19
3326	NASDAQ	ATRO	Wed, Sep 21, 2005	4.14	4.19	4.14	4.17
3325	NASDAQ	ATRO	Tue, Sep 20, 2005	4.16	4.31	4.14	4.14
3324	NASDAQ	ATRO	Mon, Sep 19, 2005	4.10	4.34	4.10	4.27
3323	NASDAQ	ATRO	Fri, Sep 16, 2005	4.30	4.30	4.12	4.21
3322	NASDAQ	ATRO	Thu, Sep 15, 2005	4.15	4.47	4.07	4.10
3321	NASDAQ	ATRO	Wed, Sep 14, 2005	4.49	4.49	4.23	4.23
3320	NASDAQ	ATRO	Tue, Sep 13, 2005	4.51	4.51	4.38	4.38
3319	NASDAQ	ATRO	Mon, Sep 12, 2005	4.46	4.46	4.38	4.43
3318	NASDAQ	ATRO	Fri, Sep 9, 2005	4.52	4.70	4.20	4.45
3317	NASDAQ	ATRO	Thu, Sep 8, 2005	4.37	4.55	4.36	4.42
3316	NASDAQ	ATRO	Wed, Sep 7, 2005	4.32	4.38	4.29	4.29
3315	NASDAQ	ATRO	Tue, Sep 6, 2005	4.29	4.29	4.15	4.21
3314	NASDAQ	ATRO	Fri, Sep 2, 2005	4.11	4.31	4.11	4.31
3313	NASDAQ	ATRO	Thu, Sep 1, 2005	4.31	4.31	4.17	4.17
3312	NASDAQ	ATRO	Wed, Aug 31, 2005	4.29	4.29	4.12	4.28
3311	NASDAQ	ATRO	Tue, Aug 30, 2005	4.29	4.29	4.29	4.29
3310	NASDAQ	ATRO	Mon, Aug 29, 2005	3.97	4.29	3.97	4.16
3309	NASDAQ	ATRO	Fri, Aug 26, 2005	4.32	4.43	4.07	4.16
3308	NASDAQ	ATRO	Thu, Aug 25, 2005	4.30	4.30	4.11	4.13
3307	NASDAQ	ATRO	Wed, Aug 24, 2005	4.00	4.24	4.00	4.11
3306	NASDAQ	ATRO	Tue, Aug 23, 2005	4.13	4.20	4.13	4.20
3305	NASDAQ	ATRO	Mon, Aug 22, 2005	4.13	4.34	4.11	4.21
3304	NASDAQ	ATRO	Fri, Aug 19, 2005	4.41	4.42	4.22	4.27
3303	NASDAQ	ATRO	Thu, Aug 18, 2005	4.22	4.43	4.22	4.30
3302	NASDAQ	ATRO	Wed, Aug 17, 2005	4.21	4.44	4.00	4.44
3301	NASDAQ	ATRO	Tue, Aug 16, 2005	4.15	4.42	4.15	4.41
3300	NASDAQ	ATRO	Mon, Aug 15, 2005	4.11	4.37	4.05	4.37
3299	NASDAQ	ATRO	Fri, Aug 12, 2005	4.20	4.20	4.11	4.11
3298	NASDAQ	ATRO	Thu, Aug 11, 2005	4.22	4.29	4.22	4.26
3297	NASDAQ	ATRO	Wed, Aug 10, 2005	4.47	4.47	4.12	4.26
3296	NASDAQ	ATRO	Tue, Aug 9, 2005	4.61	4.61	4.36	4.36
3295	NASDAQ	ATRO	Mon, Aug 8, 2005	4.69	4.69	4.37	4.53
3294	NASDAQ	ATRO	Fri, Aug 5, 2005	4.48	4.57	4.34	4.57
3293	NASDAQ	ATRO	Thu, Aug 4, 2005	4.61	4.82	4.41	4.50
3292	NASDAQ	ATRO	Wed, Aug 3, 2005	4.57	4.68	4.57	4.61
3291	NASDAQ	ATRO	Tue, Aug 2, 2005	4.74	4.74	4.66	4.66
3290	NASDAQ	ATRO	Mon, Aug 1, 2005	4.73	4.73	4.34	4.69
3289	NASDAQ	ATRO	Fri, Jul 29, 2005	4.57	4.73	4.53	4.70
3288	NASDAQ	ATRO	Thu, Jul 28, 2005	4.42	4.70	4.38	4.63
3287	NASDAQ	ATRO	Wed, Jul 27, 2005	4.34	4.52	4.17	4.42
3286	NASDAQ	ATRO	Tue, Jul 26, 2005	4.27	4.27	4.23	4.23
3285	NASDAQ	ATRO	Mon, Jul 25, 2005	4.08	4.25	4.04	4.23
3284	NASDAQ	ATRO	Fri, Jul 22, 2005	4.04	4.10	4.02	4.08
3283	NASDAQ	ATRO	Thu, Jul 21, 2005	4.16	4.16	4.11	4.11
3282	NASDAQ	ATRO	Wed, Jul 20, 2005	3.88	4.19	3.87	4.16
3281	NASDAQ	ATRO	Tue, Jul 19, 2005	3.89	4.14	3.89	4.14
3280	NASDAQ	ATRO	Mon, Jul 18, 2005	4.18	4.18	4.09	4.10
3279	NASDAQ	ATRO	Fri, Jul 15, 2005	4.08	4.22	4.08	4.20
3278	NASDAQ	ATRO	Thu, Jul 14, 2005	4.25	4.25	4.23	4.23
3277	NASDAQ	ATRO	Wed, Jul 13, 2005	4.22	4.25	4.18	4.25
3276	NASDAQ	ATRO	Tue, Jul 12, 2005	4.39	4.51	4.07	4.23
3275	NASDAQ	ATRO	Mon, Jul 11, 2005	4.00	4.20	3.94	4.20
3274	NASDAQ	ATRO	Fri, Jul 8, 2005	4.06	4.26	4.06	4.18
3273	NASDAQ	ATRO	Thu, Jul 7, 2005	4.11	4.19	4.02	4.11
3272	NASDAQ	ATRO	Wed, Jul 6, 2005	4.25	4.25	4.07	4.22
3271	NASDAQ	ATRO	Tue, Jul 5, 2005	4.34	4.34	4.04	4.06
3270	NASDAQ	ATRO	Fri, Jul 1, 2005	4.24	4.25	4.05	4.25
3269	NASDAQ	ATRO	Thu, Jun 30, 2005	4.16	4.22	4.13	4.13
3268	NASDAQ	ATRO	Wed, Jun 29, 2005	4.10	4.22	4.10	4.20
3267	NASDAQ	ATRO	Tue, Jun 28, 2005	3.88	4.13	3.88	4.10
3266	NASDAQ	ATRO	Mon, Jun 27, 2005	3.76	3.86	3.76	3.86
3265	NASDAQ	ATRO	Fri, Jun 24, 2005	3.76	3.89	3.76	3.89
3264	NASDAQ	ATRO	Thu, Jun 23, 2005	3.75	3.96	3.75	3.96
3263	NASDAQ	ATRO	Wed, Jun 22, 2005	3.89	3.89	3.84	3.87
3262	NASDAQ	ATRO	Tue, Jun 21, 2005	3.89	3.89	3.73	3.86
3261	NASDAQ	ATRO	Mon, Jun 20, 2005	3.83	3.90	3.71	3.81
3260	NASDAQ	ATRO	Fri, Jun 17, 2005	3.88	3.88	3.75	3.83
3259	NASDAQ	ATRO	Thu, Jun 16, 2005	3.94	3.97	3.87	3.87
3258	NASDAQ	ATRO	Wed, Jun 15, 2005	3.97	3.97	3.71	3.93
3257	NASDAQ	ATRO	Tue, Jun 14, 2005	3.99	4.04	3.93	3.99
3256	NASDAQ	ATRO	Mon, Jun 13, 2005	3.71	3.95	3.71	3.93
3255	NASDAQ	ATRO	Fri, Jun 10, 2005	4.06	4.06	3.79	3.97
3254	NASDAQ	ATRO	Thu, Jun 9, 2005	4.00	4.05	3.87	3.97
3253	NASDAQ	ATRO	Wed, Jun 8, 2005	3.88	4.10	3.88	4.01
3252	NASDAQ	ATRO	Tue, Jun 7, 2005	3.90	3.95	3.87	3.94
3251	NASDAQ	ATRO	Mon, Jun 6, 2005	3.95	3.95	3.63	3.89
3250	NASDAQ	ATRO	Fri, Jun 3, 2005	3.93	3.93	3.65	3.82
3249	NASDAQ	ATRO	Thu, Jun 2, 2005	3.68	3.82	3.68	3.82
3248	NASDAQ	ATRO	Wed, Jun 1, 2005	3.61	3.72	3.61	3.68
3247	NASDAQ	ATRO	Tue, May 31, 2005	3.65	3.68	3.61	3.68
3246	NASDAQ	ATRO	Fri, May 27, 2005	3.67	3.67	3.65	3.67
3245	NASDAQ	ATRO	Thu, May 26, 2005	3.54	3.70	3.54	3.61
3244	NASDAQ	ATRO	Wed, May 25, 2005	3.49	3.70	3.49	3.68
3243	NASDAQ	ATRO	Tue, May 24, 2005	3.63	3.68	3.60	3.67
3242	NASDAQ	ATRO	Mon, May 23, 2005	3.47	3.62	3.40	3.61
3241	NASDAQ	ATRO	Fri, May 20, 2005	3.31	3.35	3.18	3.26
3240	NASDAQ	ATRO	Thu, May 19, 2005	3.37	3.42	3.36	3.42
3239	NASDAQ	ATRO	Wed, May 18, 2005	3.16	3.44	3.16	3.41
3238	NASDAQ	ATRO	Tue, May 17, 2005	3.20	3.31	3.20	3.31
3237	NASDAQ	ATRO	Mon, May 16, 2005	3.49	3.49	3.16	3.30
3236	NASDAQ	ATRO	Fri, May 13, 2005	3.36	3.41	3.08	3.38
3235	NASDAQ	ATRO	Thu, May 12, 2005	3.22	3.23	3.17	3.23
3234	NASDAQ	ATRO	Wed, May 11, 2005	3.10	3.17	3.10	3.17
3233	NASDAQ	ATRO	Tue, May 10, 2005	3.24	3.24	3.10	3.23
3232	NASDAQ	ATRO	Mon, May 9, 2005	3.49	3.49	3.10	3.24
3231	NASDAQ	ATRO	Fri, May 6, 2005	3.13	3.24	3.13	3.22
3230	NASDAQ	ATRO	Thu, May 5, 2005	3.28	3.37	3.08	3.13
3229	NASDAQ	ATRO	Wed, May 4, 2005	3.19	3.20	3.08	3.18
3228	NASDAQ	ATRO	Tue, May 3, 2005	3.37	3.37	3.35	3.35
3227	NASDAQ	ATRO	Mon, May 2, 2005	3.26	3.34	3.15	3.34
3226	NASDAQ	ATRO	Fri, Apr 29, 2005	3.62	3.62	3.10	3.22
3225	NASDAQ	ATRO	Thu, Apr 28, 2005	3.47	3.72	3.35	3.47
3224	NASDAQ	ATRO	Wed, Apr 27, 2005	3.19	3.52	3.11	3.52
3223	NASDAQ	ATRO	Tue, Apr 26, 2005	2.97	3.07	2.97	3.06
3222	NASDAQ	ATRO	Mon, Apr 25, 2005	2.97	3.08	2.97	3.00
3221	NASDAQ	ATRO	Fri, Apr 22, 2005	3.09	3.09	3.08	3.09
3220	NASDAQ	ATRO	Thu, Apr 21, 2005	3.09	3.09	3.09	3.09
3219	NASDAQ	ATRO	Wed, Apr 20, 2005	3.15	3.15	2.95	3.05
3218	NASDAQ	ATRO	Tue, Apr 19, 2005	2.97	3.18	2.94	3.04
3217	NASDAQ	ATRO	Mon, Apr 18, 2005	2.92	2.99	2.91	2.95
3216	NASDAQ	ATRO	Fri, Apr 15, 2005	2.74	2.97	2.74	2.97
3215	NASDAQ	ATRO	Thu, Apr 14, 2005	2.90	2.95	2.89	2.90
3214	NASDAQ	ATRO	Wed, Apr 13, 2005	2.97	3.05	2.90	2.90
3213	NASDAQ	ATRO	Tue, Apr 12, 2005	2.98	3.00	2.97	2.97
3212	NASDAQ	ATRO	Mon, Apr 11, 2005	3.04	3.04	3.04	3.04
3211	NASDAQ	ATRO	Fri, Apr 8, 2005	2.98	3.06	2.98	2.98
3210	NASDAQ	ATRO	Thu, Apr 7, 2005	3.08	3.09	2.97	2.98
3209	NASDAQ	ATRO	Wed, Apr 6, 2005	3.09	3.09	2.97	3.09
3208	NASDAQ	ATRO	Tue, Apr 5, 2005	3.19	3.19	3.08	3.10
3207	NASDAQ	ATRO	Mon, Apr 4, 2005	3.21	3.21	3.01	3.17
3206	NASDAQ	ATRO	Fri, Apr 1, 2005	3.22	3.22	3.15	3.21
3205	NASDAQ	ATRO	Thu, Mar 31, 2005	3.18	3.19	3.13	3.19
3204	NASDAQ	ATRO	Wed, Mar 30, 2005	3.27	3.27	2.98	3.10
3203	NASDAQ	ATRO	Tue, Mar 29, 2005	3.31	3.31	3.09	3.23
3202	NASDAQ	ATRO	Mon, Mar 28, 2005	3.29	3.29	3.26	3.26
3201	NASDAQ	ATRO	Thu, Mar 24, 2005	3.25	3.25	3.04	3.08
3200	NASDAQ	ATRO	Wed, Mar 23, 2005	3.19	3.19	3.08	3.08
3199	NASDAQ	ATRO	Tue, Mar 22, 2005	2.98	3.15	2.98	3.14
3198	NASDAQ	ATRO	Mon, Mar 21, 2005	3.26	3.26	2.97	2.97
3197	NASDAQ	ATRO	Fri, Mar 18, 2005	3.26	3.26	3.15	3.17
3196	NASDAQ	ATRO	Thu, Mar 17, 2005	3.29	3.29	3.22	3.26
3195	NASDAQ	ATRO	Wed, Mar 16, 2005	3.20	3.31	2.98	3.29
3194	NASDAQ	ATRO	Tue, Mar 15, 2005	3.19	3.21	3.08	3.18
3193	NASDAQ	ATRO	Mon, Mar 14, 2005	2.95	3.33	2.93	2.98
3192	NASDAQ	ATRO	Fri, Mar 11, 2005	3.08	3.08	3.07	3.07
3191	NASDAQ	ATRO	Thu, Mar 10, 2005	2.95	3.08	2.95	3.08
3190	NASDAQ	ATRO	Wed, Mar 9, 2005	3.01	3.01	2.96	3.00
3189	NASDAQ	ATRO	Tue, Mar 8, 2005	2.98	3.03	2.98	3.02
3188	NASDAQ	ATRO	Mon, Mar 7, 2005	2.97	3.01	2.97	2.97
3187	NASDAQ	ATRO	Fri, Mar 4, 2005	2.98	3.00	2.98	2.99
3186	NASDAQ	ATRO	Thu, Mar 3, 2005	2.93	3.01	2.93	2.98
3185	NASDAQ	ATRO	Wed, Mar 2, 2005	2.89	3.01	2.89	2.95
3184	NASDAQ	ATRO	Tue, Mar 1, 2005	2.97	3.00	2.97	2.99
3183	NASDAQ	ATRO	Mon, Feb 28, 2005	3.01	3.02	2.97	2.99
3182	NASDAQ	ATRO	Fri, Feb 25, 2005	3.08	3.08	2.94	3.02
3181	NASDAQ	ATRO	Thu, Feb 24, 2005	2.88	3.01	2.88	2.97
3180	NASDAQ	ATRO	Wed, Feb 23, 2005	3.00	3.08	2.98	2.98
3179	NASDAQ	ATRO	Tue, Feb 22, 2005	2.90	3.00	2.90	3.00
3178	NASDAQ	ATRO	Fri, Feb 18, 2005	3.00	3.00	2.97	2.97
3177	NASDAQ	ATRO	Thu, Feb 17, 2005	3.00	3.01	2.97	2.97
3176	NASDAQ	ATRO	Wed, Feb 16, 2005	2.91	3.01	2.74	3.00
3175	NASDAQ	ATRO	Tue, Feb 15, 2005	2.90	3.00	2.90	3.00
3174	NASDAQ	ATRO	Mon, Feb 14, 2005	2.97	3.00	2.96	3.00
3173	NASDAQ	ATRO	Fri, Feb 11, 2005	3.01	3.04	2.97	3.01
3172	NASDAQ	ATRO	Thu, Feb 10, 2005	3.01	3.08	2.95	3.00
3171	NASDAQ	ATRO	Wed, Feb 9, 2005	2.90	3.08	2.90	2.98
3170	NASDAQ	ATRO	Tue, Feb 8, 2005	3.01	3.01	2.90	3.01
3169	NASDAQ	ATRO	Mon, Feb 7, 2005	2.97	3.08	2.95	2.97
3168	NASDAQ	ATRO	Fri, Feb 4, 2005	2.36	3.03	2.36	2.96
3167	NASDAQ	ATRO	Thu, Feb 3, 2005	2.36	2.36	2.15	2.36
3166	NASDAQ	ATRO	Wed, Feb 2, 2005	2.28	2.35	2.28	2.35
3165	NASDAQ	ATRO	Tue, Feb 1, 2005	2.31	2.35	2.28	2.31
3164	NASDAQ	ATRO	Mon, Jan 31, 2005	2.30	2.32	2.26	2.32
3163	NASDAQ	ATRO	Fri, Jan 28, 2005	2.37	2.37	2.28	2.33
3162	NASDAQ	ATRO	Thu, Jan 27, 2005	2.28	2.38	2.26	2.37
3161	NASDAQ	ATRO	Wed, Jan 26, 2005	2.28	2.28	2.23	2.23
3160	NASDAQ	ATRO	Mon, Jan 24, 2005	2.26	2.31	2.21	2.30
3159	NASDAQ	ATRO	Fri, Jan 21, 2005	2.24	2.28	2.24	2.25
3158	NASDAQ	ATRO	Thu, Jan 20, 2005	2.24	2.26	2.23	2.23
3157	NASDAQ	ATRO	Wed, Jan 19, 2005	2.28	2.28	2.24	2.28
3156	NASDAQ	ATRO	Tue, Jan 18, 2005	2.32	2.32	2.19	2.28
3155	NASDAQ	ATRO	Fri, Jan 14, 2005	2.24	2.30	2.24	2.26
3154	NASDAQ	ATRO	Wed, Jan 12, 2005	2.21	2.21	2.21	2.21
3153	NASDAQ	ATRO	Tue, Jan 11, 2005	2.26	2.26	2.23	2.23
3152	NASDAQ	ATRO	Mon, Jan 10, 2005	2.29	2.29	2.18	2.26
3151	NASDAQ	ATRO	Fri, Jan 7, 2005	2.28	2.28	2.28	2.28
3150	NASDAQ	ATRO	Thu, Jan 6, 2005	2.24	2.27	2.24	2.27
3149	NASDAQ	ATRO	Wed, Jan 5, 2005	2.25	2.36	2.24	2.25
3148	NASDAQ	ATRO	Tue, Jan 4, 2005	2.25	2.28	2.24	2.28
3147	NASDAQ	ATRO	Mon, Jan 3, 2005	2.29	2.29	2.28	2.28
3146	NASDAQ	ATRO	Fri, Dec 31, 2004	2.26	2.33	2.26	2.33
3145	NASDAQ	ATRO	Thu, Dec 30, 2004	2.25	2.28	2.25	2.28
3144	NASDAQ	ATRO	Wed, Dec 29, 2004	2.17	2.28	2.17	2.28
3143	NASDAQ	ATRO	Tue, Dec 28, 2004	2.16	2.30	2.16	2.24
3142	NASDAQ	ATRO	Mon, Dec 27, 2004	2.28	2.29	2.17	2.25
3141	NASDAQ	ATRO	Thu, Dec 23, 2004	2.28	2.29	2.27	2.27
3140	NASDAQ	ATRO	Wed, Dec 22, 2004	2.24	2.33	2.24	2.28
3139	NASDAQ	ATRO	Tue, Dec 21, 2004	2.30	2.36	2.27	2.32
3138	NASDAQ	ATRO	Mon, Dec 20, 2004	2.28	2.35	2.26	2.26
3137	NASDAQ	ATRO	Fri, Dec 17, 2004	2.40	2.42	2.25	2.29
3136	NASDAQ	ATRO	Thu, Dec 16, 2004	2.24	2.40	2.24	2.39
3135	NASDAQ	ATRO	Wed, Dec 15, 2004	2.29	2.37	2.29	2.36
3134	NASDAQ	ATRO	Tue, Dec 14, 2004	2.35	2.35	2.29	2.32
3133	NASDAQ	ATRO	Mon, Dec 13, 2004	2.24	2.37	2.24	2.37
3132	NASDAQ	ATRO	Fri, Dec 10, 2004	2.45	2.45	2.31	2.37
3131	NASDAQ	ATRO	Thu, Dec 9, 2004	2.28	2.41	2.28	2.41
3130	NASDAQ	ATRO	Wed, Dec 8, 2004	2.26	2.33	2.26	2.29
3129	NASDAQ	ATRO	Tue, Dec 7, 2004	2.32	2.32	2.27	2.27
3128	NASDAQ	ATRO	Mon, Dec 6, 2004	2.31	2.32	2.28	2.29
3127	NASDAQ	ATRO	Thu, Dec 2, 2004	2.28	2.35	2.26	2.31
3126	NASDAQ	ATRO	Wed, Dec 1, 2004	2.26	2.37	2.26	2.26
3125	NASDAQ	ATRO	Tue, Nov 30, 2004	2.26	2.31	2.25	2.26
3124	NASDAQ	ATRO	Mon, Nov 29, 2004	2.30	2.31	2.26	2.26
3123	NASDAQ	ATRO	Fri, Nov 26, 2004	2.24	2.31	2.24	2.31
3122	NASDAQ	ATRO	Wed, Nov 24, 2004	2.35	2.42	2.28	2.39
3121	NASDAQ	ATRO	Tue, Nov 23, 2004	2.29	2.41	2.29	2.41
3120	NASDAQ	ATRO	Mon, Nov 22, 2004	2.31	2.40	2.31	2.38
3119	NASDAQ	ATRO	Fri, Nov 19, 2004	2.30	2.44	2.30	2.42
3118	NASDAQ	ATRO	Thu, Nov 18, 2004	2.41	2.46	2.37	2.46
3117	NASDAQ	ATRO	Wed, Nov 17, 2004	2.29	2.50	2.29	2.46
3116	NASDAQ	ATRO	Tue, Nov 16, 2004	2.42	2.42	2.33	2.42
3115	NASDAQ	ATRO	Mon, Nov 15, 2004	2.28	2.48	2.19	2.48
3114	NASDAQ	ATRO	Fri, Nov 12, 2004	2.17	2.28	2.17	2.27
3113	NASDAQ	ATRO	Thu, Nov 11, 2004	2.23	2.24	2.23	2.24
3112	NASDAQ	ATRO	Wed, Nov 10, 2004	2.21	2.27	2.14	2.27
3111	NASDAQ	ATRO	Tue, Nov 9, 2004	2.26	2.37	2.08	2.26
3110	NASDAQ	ATRO	Mon, Nov 8, 2004	2.19	2.28	2.13	2.28
3109	NASDAQ	ATRO	Fri, Nov 5, 2004	2.29	2.32	2.24	2.29
3108	NASDAQ	ATRO	Thu, Nov 4, 2004	2.34	2.37	2.25	2.29
3107	NASDAQ	ATRO	Wed, Nov 3, 2004	2.28	2.37	2.27	2.27
3106	NASDAQ	ATRO	Tue, Nov 2, 2004	2.28	2.28	2.28	2.28
3105	NASDAQ	ATRO	Mon, Nov 1, 2004	2.26	2.29	2.25	2.26
3104	NASDAQ	ATRO	Fri, Oct 29, 2004	2.28	2.35	2.21	2.30
3103	NASDAQ	ATRO	Thu, Oct 28, 2004	2.28	2.37	2.26	2.35
3102	NASDAQ	ATRO	Wed, Oct 27, 2004	2.24	2.33	2.17	2.27
3101	NASDAQ	ATRO	Tue, Oct 26, 2004	2.17	2.33	2.17	2.24
3100	NASDAQ	ATRO	Mon, Oct 25, 2004	2.26	2.28	2.25	2.25
3099	NASDAQ	ATRO	Wed, Oct 20, 2004	2.28	2.28	2.28	2.28
3098	NASDAQ	ATRO	Tue, Oct 19, 2004	2.21	2.31	2.20	2.24
3097	NASDAQ	ATRO	Mon, Oct 18, 2004	2.25	2.28	2.15	2.28
3096	NASDAQ	ATRO	Fri, Oct 15, 2004	2.28	2.28	2.17	2.23
3095	NASDAQ	ATRO	Thu, Oct 14, 2004	2.27	2.28	2.17	2.25
3094	NASDAQ	ATRO	Wed, Oct 13, 2004	2.24	2.28	2.15	2.21
3093	NASDAQ	ATRO	Tue, Oct 12, 2004	2.25	2.26	2.16	2.24
3092	NASDAQ	ATRO	Mon, Oct 11, 2004	2.24	2.24	2.16	2.24
3091	NASDAQ	ATRO	Fri, Oct 8, 2004	2.24	2.25	2.24	2.24
3090	NASDAQ	ATRO	Thu, Oct 7, 2004	2.23	2.41	2.16	2.31
3089	NASDAQ	ATRO	Wed, Oct 6, 2004	2.25	2.28	2.20	2.20
3088	NASDAQ	ATRO	Tue, Oct 5, 2004	2.26	2.33	2.20	2.20
3087	NASDAQ	ATRO	Mon, Oct 4, 2004	2.27	2.32	2.27	2.28
3086	NASDAQ	ATRO	Fri, Oct 1, 2004	2.29	2.29	2.15	2.24
3085	NASDAQ	ATRO	Thu, Sep 30, 2004	2.28	2.34	2.26	2.34
3084	NASDAQ	ATRO	Wed, Sep 29, 2004	2.32	2.34	2.27	2.29
3083	NASDAQ	ATRO	Tue, Sep 28, 2004	2.29	2.34	2.29	2.34
3082	NASDAQ	ATRO	Mon, Sep 27, 2004	2.28	2.34	2.28	2.34
3081	NASDAQ	ATRO	Fri, Sep 24, 2004	2.33	2.35	2.29	2.29
3080	NASDAQ	ATRO	Thu, Sep 23, 2004	2.19	2.32	2.19	2.29
3079	NASDAQ	ATRO	Wed, Sep 22, 2004	2.22	2.25	2.22	2.24
3078	NASDAQ	ATRO	Tue, Sep 21, 2004	2.14	2.27	2.14	2.27
3077	NASDAQ	ATRO	Mon, Sep 20, 2004	2.10	2.22	2.10	2.22
3076	NASDAQ	ATRO	Fri, Sep 17, 2004	2.14	2.20	2.14	2.17
3075	NASDAQ	ATRO	Thu, Sep 16, 2004	2.23	2.23	2.11	2.11
3074	NASDAQ	ATRO	Wed, Sep 15, 2004	2.19	2.25	2.19	2.20
3073	NASDAQ	ATRO	Tue, Sep 14, 2004	2.28	2.28	2.25	2.27
3072	NASDAQ	ATRO	Mon, Sep 13, 2004	2.29	2.30	2.20	2.20
3071	NASDAQ	ATRO	Fri, Sep 10, 2004	2.24	2.32	2.14	2.32
3070	NASDAQ	ATRO	Thu, Sep 9, 2004	2.16	2.21	2.15	2.18
3069	NASDAQ	ATRO	Wed, Sep 8, 2004	2.12	2.20	2.11	2.16
3068	NASDAQ	ATRO	Tue, Sep 7, 2004	2.11	2.25	2.11	2.21
3067	NASDAQ	ATRO	Fri, Sep 3, 2004	2.28	2.28	2.12	2.23
3066	NASDAQ	ATRO	Thu, Sep 2, 2004	2.27	2.28	2.27	2.28
3065	NASDAQ	ATRO	Wed, Sep 1, 2004	2.28	2.28	2.23	2.23
3064	NASDAQ	ATRO	Mon, Aug 30, 2004	2.26	2.28	2.26	2.28
3063	NASDAQ	ATRO	Fri, Aug 27, 2004	2.13	2.28	2.13	2.26
3062	NASDAQ	ATRO	Thu, Aug 26, 2004	2.26	2.26	2.21	2.26
3061	NASDAQ	ATRO	Wed, Aug 25, 2004	2.22	2.28	2.21	2.25
3060	NASDAQ	ATRO	Tue, Aug 24, 2004	2.24	2.28	2.19	2.24
3059	NASDAQ	ATRO	Mon, Aug 23, 2004	2.19	2.28	2.19	2.26
3058	NASDAQ	ATRO	Fri, Aug 20, 2004	2.12	2.30	2.12	2.26
3057	NASDAQ	ATRO	Thu, Aug 19, 2004	2.23	2.23	2.10	2.22
3056	NASDAQ	ATRO	Wed, Aug 18, 2004	2.14	2.24	2.12	2.24
3055	NASDAQ	ATRO	Tue, Aug 17, 2004	2.26	2.26	2.12	2.14
3054	NASDAQ	ATRO	Mon, Aug 16, 2004	2.20	2.26	2.20	2.26
3053	NASDAQ	ATRO	Fri, Aug 13, 2004	2.28	2.28	2.28	2.28
3052	NASDAQ	ATRO	Thu, Aug 12, 2004	2.24	2.30	2.24	2.24
3051	NASDAQ	ATRO	Wed, Aug 11, 2004	2.18	2.33	2.18	2.32
3050	NASDAQ	ATRO	Tue, Aug 10, 2004	2.22	2.44	2.19	2.19
3049	NASDAQ	ATRO	Mon, Aug 9, 2004	2.12	2.25	2.12	2.22
3048	NASDAQ	ATRO	Fri, Aug 6, 2004	2.18	2.27	2.11	2.25
3047	NASDAQ	ATRO	Thu, Aug 5, 2004	2.32	2.36	2.12	2.28
3046	NASDAQ	ATRO	Wed, Aug 4, 2004	2.12	2.30	2.08	2.22
3045	NASDAQ	ATRO	Tue, Aug 3, 2004	2.05	2.27	2.05	2.27
3044	NASDAQ	ATRO	Mon, Aug 2, 2004	2.18	2.19	2.05	2.19
3043	NASDAQ	ATRO	Fri, Jul 30, 2004	2.22	2.24	2.18	2.23
3042	NASDAQ	ATRO	Thu, Jul 29, 2004	2.17	2.39	2.17	2.21
3041	NASDAQ	ATRO	Wed, Jul 28, 2004	2.17	2.44	2.17	2.37
3040	NASDAQ	ATRO	Tue, Jul 27, 2004	2.20	2.36	2.10	2.34
3039	NASDAQ	ATRO	Mon, Jul 26, 2004	2.12	2.51	2.12	2.30
3038	NASDAQ	ATRO	Fri, Jul 23, 2004	2.29	2.37	2.14	2.22
3037	NASDAQ	ATRO	Thu, Jul 22, 2004	2.24	2.40	2.24	2.35
3036	NASDAQ	ATRO	Wed, Jul 21, 2004	2.35	2.46	2.34	2.36
3035	NASDAQ	ATRO	Tue, Jul 20, 2004	2.39	2.44	2.39	2.44
3034	NASDAQ	ATRO	Mon, Jul 19, 2004	2.40	2.43	2.34	2.38
3033	NASDAQ	ATRO	Fri, Jul 16, 2004	2.39	2.44	2.39	2.44
3032	NASDAQ	ATRO	Thu, Jul 15, 2004	2.37	2.44	2.37	2.40
3031	NASDAQ	ATRO	Wed, Jul 14, 2004	2.38	2.42	2.38	2.42
3030	NASDAQ	ATRO	Tue, Jul 13, 2004	2.43	2.44	2.30	2.39
3029	NASDAQ	ATRO	Mon, Jul 12, 2004	2.34	2.40	2.34	2.40
3028	NASDAQ	ATRO	Fri, Jul 9, 2004	2.35	2.44	2.35	2.37
3027	NASDAQ	ATRO	Thu, Jul 8, 2004	2.34	2.44	2.34	2.44
3026	NASDAQ	ATRO	Wed, Jul 7, 2004	2.34	2.46	2.34	2.40
3025	NASDAQ	ATRO	Tue, Jul 6, 2004	2.38	2.46	2.38	2.45
3024	NASDAQ	ATRO	Fri, Jul 2, 2004	2.39	2.44	2.34	2.37
3023	NASDAQ	ATRO	Thu, Jul 1, 2004	2.37	2.37	2.34	2.37
3022	NASDAQ	ATRO	Wed, Jun 30, 2004	2.46	2.46	2.42	2.42
3021	NASDAQ	ATRO	Tue, Jun 29, 2004	2.38	2.45	2.38	2.45
3020	NASDAQ	ATRO	Mon, Jun 28, 2004	2.35	2.38	2.35	2.37
3019	NASDAQ	ATRO	Fri, Jun 25, 2004	2.42	2.45	2.41	2.45
3018	NASDAQ	ATRO	Thu, Jun 24, 2004	2.46	2.46	2.41	2.41
3017	NASDAQ	ATRO	Wed, Jun 23, 2004	2.34	2.40	2.34	2.40
3016	NASDAQ	ATRO	Tue, Jun 22, 2004	2.42	2.42	2.35	2.35
3015	NASDAQ	ATRO	Mon, Jun 21, 2004	2.36	2.40	2.36	2.40
3014	NASDAQ	ATRO	Fri, Jun 18, 2004	2.41	2.42	2.36	2.36
3013	NASDAQ	ATRO	Thu, Jun 17, 2004	2.34	2.38	2.34	2.38
3012	NASDAQ	ATRO	Wed, Jun 16, 2004	2.39	2.39	2.34	2.37
3011	NASDAQ	ATRO	Tue, Jun 15, 2004	2.37	2.39	2.35	2.35
3010	NASDAQ	ATRO	Mon, Jun 14, 2004	2.33	2.34	2.33	2.34
3009	NASDAQ	ATRO	Thu, Jun 10, 2004	2.34	2.34	2.34	2.34
3008	NASDAQ	ATRO	Wed, Jun 9, 2004	2.31	2.32	2.26	2.26
3007	NASDAQ	ATRO	Tue, Jun 8, 2004	2.22	2.37	2.22	2.31
3006	NASDAQ	ATRO	Mon, Jun 7, 2004	2.37	2.37	2.37	2.37
3005	NASDAQ	ATRO	Thu, Jun 3, 2004	2.29	2.34	2.29	2.34
3004	NASDAQ	ATRO	Wed, Jun 2, 2004	2.26	2.33	2.26	2.33
3003	NASDAQ	ATRO	Tue, Jun 1, 2004	2.24	2.31	2.24	2.28
3002	NASDAQ	ATRO	Fri, May 28, 2004	2.33	2.33	2.28	2.32
3001	NASDAQ	ATRO	Thu, May 27, 2004	2.26	2.37	2.26	2.28
3000	NASDAQ	ATRO	Wed, May 26, 2004	2.27	2.40	2.27	2.33
2999	NASDAQ	ATRO	Tue, May 25, 2004	2.24	2.30	2.24	2.26
2998	NASDAQ	ATRO	Mon, May 24, 2004	2.24	2.31	2.24	2.27
2997	NASDAQ	ATRO	Fri, May 21, 2004	2.26	2.29	2.25	2.29
2996	NASDAQ	ATRO	Thu, May 20, 2004	2.29	2.37	2.26	2.37
2995	NASDAQ	ATRO	Wed, May 19, 2004	2.29	2.35	2.29	2.31
2994	NASDAQ	ATRO	Tue, May 18, 2004	2.29	2.32	2.29	2.31
2993	NASDAQ	ATRO	Mon, May 17, 2004	2.33	2.41	2.29	2.30
2992	NASDAQ	ATRO	Fri, May 14, 2004	2.37	2.37	2.35	2.35
2991	NASDAQ	ATRO	Thu, May 13, 2004	2.35	2.42	2.35	2.37
2990	NASDAQ	ATRO	Wed, May 12, 2004	2.40	2.41	2.38	2.38
2989	NASDAQ	ATRO	Tue, May 11, 2004	2.42	2.43	2.39	2.43
2988	NASDAQ	ATRO	Mon, May 10, 2004	2.38	2.46	2.38	2.42
2987	NASDAQ	ATRO	Fri, May 7, 2004	2.44	2.44	2.38	2.38
2986	NASDAQ	ATRO	Thu, May 6, 2004	2.47	2.47	2.45	2.47
2985	NASDAQ	ATRO	Wed, May 5, 2004	2.42	2.47	2.42	2.46
2984	NASDAQ	ATRO	Tue, May 4, 2004	2.42	2.51	2.35	2.51
2983	NASDAQ	ATRO	Mon, May 3, 2004	2.43	2.51	2.43	2.51
2982	NASDAQ	ATRO	Fri, Apr 30, 2004	2.58	2.58	2.46	2.49
2981	NASDAQ	ATRO	Thu, Apr 29, 2004	2.48	2.56	2.43	2.52
2980	NASDAQ	ATRO	Wed, Apr 28, 2004	2.44	2.50	2.42	2.49
2979	NASDAQ	ATRO	Tue, Apr 27, 2004	2.44	2.50	2.40	2.45
2978	NASDAQ	ATRO	Mon, Apr 26, 2004	2.38	2.40	2.37	2.38
2977	NASDAQ	ATRO	Fri, Apr 23, 2004	2.42	2.45	2.40	2.41
2976	NASDAQ	ATRO	Thu, Apr 22, 2004	2.40	2.44	2.40	2.40
2975	NASDAQ	ATRO	Wed, Apr 21, 2004	2.42	2.48	2.36	2.40
2974	NASDAQ	ATRO	Tue, Apr 20, 2004	2.41	2.41	2.41	2.41
2973	NASDAQ	ATRO	Mon, Apr 19, 2004	2.51	2.51	2.36	2.51
2972	NASDAQ	ATRO	Fri, Apr 16, 2004	2.47	2.47	2.40	2.42
2971	NASDAQ	ATRO	Thu, Apr 15, 2004	2.36	2.42	2.36	2.42
2970	NASDAQ	ATRO	Wed, Apr 14, 2004	2.37	2.42	2.36	2.37
2969	NASDAQ	ATRO	Tue, Apr 13, 2004	2.12	2.42	2.12	2.37
2968	NASDAQ	ATRO	Mon, Apr 12, 2004	2.36	2.40	2.36	2.38
2967	NASDAQ	ATRO	Thu, Apr 8, 2004	2.38	2.44	2.33	2.44
2966	NASDAQ	ATRO	Wed, Apr 7, 2004	2.38	2.51	2.36	2.44
2965	NASDAQ	ATRO	Tue, Apr 6, 2004	2.41	2.51	2.41	2.51
2964	NASDAQ	ATRO	Mon, Apr 5, 2004	2.45	2.49	2.38	2.40
2963	NASDAQ	ATRO	Fri, Apr 2, 2004	2.43	2.46	2.36	2.45
2962	NASDAQ	ATRO	Thu, Apr 1, 2004	2.36	2.47	2.36	2.46
2961	NASDAQ	ATRO	Wed, Mar 31, 2004	2.37	2.44	2.37	2.44
2960	NASDAQ	ATRO	Tue, Mar 30, 2004	2.42	2.44	2.37	2.41
2959	NASDAQ	ATRO	Mon, Mar 29, 2004	2.36	2.42	2.36	2.40
2958	NASDAQ	ATRO	Fri, Mar 26, 2004	2.41	2.46	2.35	2.40
2957	NASDAQ	ATRO	Thu, Mar 25, 2004	2.42	2.47	2.37	2.43
2956	NASDAQ	ATRO	Wed, Mar 24, 2004	2.42	2.46	2.37	2.42
2955	NASDAQ	ATRO	Tue, Mar 23, 2004	2.43	2.45	2.35	2.35
2954	NASDAQ	ATRO	Mon, Mar 22, 2004	2.40	2.46	2.40	2.41
2953	NASDAQ	ATRO	Fri, Mar 19, 2004	2.28	2.40	2.28	2.32
2952	NASDAQ	ATRO	Thu, Mar 18, 2004	2.21	2.28	2.21	2.28
2951	NASDAQ	ATRO	Wed, Mar 17, 2004	2.33	2.33	2.28	2.29
2950	NASDAQ	ATRO	Tue, Mar 16, 2004	2.24	2.28	2.24	2.28
2949	NASDAQ	ATRO	Mon, Mar 15, 2004	2.19	2.33	2.19	2.29
2948	NASDAQ	ATRO	Fri, Mar 12, 2004	2.19	2.29	2.19	2.27
2947	NASDAQ	ATRO	Thu, Mar 11, 2004	2.26	2.28	2.24	2.25
2946	NASDAQ	ATRO	Wed, Mar 10, 2004	2.42	2.42	2.32	2.32
2945	NASDAQ	ATRO	Tue, Mar 9, 2004	2.44	2.44	2.32	2.37
2944	NASDAQ	ATRO	Mon, Mar 8, 2004	2.44	2.44	2.31	2.43
2943	NASDAQ	ATRO	Fri, Mar 5, 2004	2.51	2.51	2.31	2.45
2942	NASDAQ	ATRO	Thu, Mar 4, 2004	2.53	2.56	2.31	2.48
2941	NASDAQ	ATRO	Wed, Mar 3, 2004	2.28	2.49	2.28	2.39
2940	NASDAQ	ATRO	Tue, Mar 2, 2004	2.26	2.27	2.26	2.27
2939	NASDAQ	ATRO	Mon, Mar 1, 2004	2.19	2.28	2.19	2.24
2938	NASDAQ	ATRO	Fri, Feb 27, 2004	2.28	2.28	2.26	2.28
2937	NASDAQ	ATRO	Thu, Feb 26, 2004	2.24	2.28	2.24	2.26
2936	NASDAQ	ATRO	Wed, Feb 25, 2004	2.26	2.33	2.26	2.27
2935	NASDAQ	ATRO	Tue, Feb 24, 2004	2.25	2.28	2.25	2.28
2934	NASDAQ	ATRO	Mon, Feb 23, 2004	2.35	2.35	2.19	2.27
2933	NASDAQ	ATRO	Fri, Feb 20, 2004	2.42	2.42	2.35	2.40
2932	NASDAQ	ATRO	Thu, Feb 19, 2004	2.44	2.58	2.28	2.44
2931	NASDAQ	ATRO	Wed, Feb 18, 2004	2.63	2.63	2.44	2.51
2930	NASDAQ	ATRO	Tue, Feb 17, 2004	2.50	2.85	2.47	2.60
2929	NASDAQ	ATRO	Fri, Feb 13, 2004	2.48	2.60	2.48	2.60
2928	NASDAQ	ATRO	Thu, Feb 12, 2004	2.69	2.69	2.52	2.52
2927	NASDAQ	ATRO	Wed, Feb 11, 2004	2.73	2.74	2.52	2.53
2926	NASDAQ	ATRO	Tue, Feb 10, 2004	2.65	2.65	2.51	2.60
2925	NASDAQ	ATRO	Mon, Feb 9, 2004	2.69	2.71	2.53	2.65
2924	NASDAQ	ATRO	Fri, Feb 6, 2004	2.76	2.76	2.58	2.65
2923	NASDAQ	ATRO	Thu, Feb 5, 2004	2.68	2.68	2.52	2.63
2922	NASDAQ	ATRO	Wed, Feb 4, 2004	2.65	2.72	2.52	2.66
2921	NASDAQ	ATRO	Tue, Feb 3, 2004	2.52	2.73	2.52	2.67
2920	NASDAQ	ATRO	Mon, Feb 2, 2004	2.53	2.58	2.44	2.56
2919	NASDAQ	ATRO	Fri, Jan 30, 2004	2.50	2.73	2.50	2.54
2918	NASDAQ	ATRO	Thu, Jan 29, 2004	2.56	2.63	2.26	2.63
2917	NASDAQ	ATRO	Wed, Jan 28, 2004	2.53	2.54	2.42	2.50
2916	NASDAQ	ATRO	Tue, Jan 27, 2004	2.53	2.56	2.42	2.51
2915	NASDAQ	ATRO	Mon, Jan 26, 2004	2.37	2.54	2.37	2.48
2914	NASDAQ	ATRO	Fri, Jan 23, 2004	2.48	2.49	2.31	2.47
2913	NASDAQ	ATRO	Thu, Jan 22, 2004	2.28	2.55	2.28	2.43
2912	NASDAQ	ATRO	Wed, Jan 21, 2004	2.36	2.36	2.28	2.36
2911	NASDAQ	ATRO	Tue, Jan 20, 2004	2.38	2.45	2.35	2.35
2910	NASDAQ	ATRO	Fri, Jan 16, 2004	2.39	2.53	2.35	2.36
2909	NASDAQ	ATRO	Thu, Jan 15, 2004	2.49	2.56	2.34	2.34
2908	NASDAQ	ATRO	Wed, Jan 14, 2004	2.63	2.63	2.40	2.40
2907	NASDAQ	ATRO	Tue, Jan 13, 2004	2.48	2.48	2.33	2.33
2906	NASDAQ	ATRO	Mon, Jan 12, 2004	2.33	2.55	2.32	2.51
2905	NASDAQ	ATRO	Fri, Jan 9, 2004	2.37	2.37	2.33	2.33
2904	NASDAQ	ATRO	Thu, Jan 8, 2004	2.37	2.37	2.33	2.37
2903	NASDAQ	ATRO	Wed, Jan 7, 2004	2.41	2.41	2.33	2.34
2902	NASDAQ	ATRO	Tue, Jan 6, 2004	2.30	2.38	2.29	2.38
2901	NASDAQ	ATRO	Mon, Jan 5, 2004	2.44	2.44	2.31	2.37
2900	NASDAQ	ATRO	Fri, Jan 2, 2004	2.33	2.40	2.33	2.40
2899	NASDAQ	ATRO	Wed, Dec 31, 2003	2.40	2.40	2.27	2.27
2898	NASDAQ	ATRO	Tue, Dec 30, 2003	2.33	2.36	2.29	2.33
2897	NASDAQ	ATRO	Mon, Dec 29, 2003	2.33	2.33	2.33	2.33
2896	NASDAQ	ATRO	Fri, Dec 26, 2003	2.33	2.36	2.33	2.33
2895	NASDAQ	ATRO	Wed, Dec 24, 2003	2.37	2.38	2.37	2.37
2894	NASDAQ	ATRO	Tue, Dec 23, 2003	2.33	2.45	2.33	2.33
2893	NASDAQ	ATRO	Mon, Dec 22, 2003	2.33	2.47	2.33	2.34
2892	NASDAQ	ATRO	Fri, Dec 19, 2003	2.35	2.51	2.34	2.34
2891	NASDAQ	ATRO	Thu, Dec 18, 2003	2.41	2.51	2.32	2.32
2890	NASDAQ	ATRO	Wed, Dec 17, 2003	2.30	2.51	2.30	2.32
2889	NASDAQ	ATRO	Tue, Dec 16, 2003	2.41	2.46	2.24	2.28
2888	NASDAQ	ATRO	Mon, Dec 15, 2003	2.33	2.44	2.28	2.28
2887	NASDAQ	ATRO	Fri, Dec 12, 2003	2.52	2.58	2.38	2.38
2886	NASDAQ	ATRO	Thu, Dec 11, 2003	2.49	2.49	2.33	2.33
2885	NASDAQ	ATRO	Wed, Dec 10, 2003	2.36	2.46	2.33	2.33
2884	NASDAQ	ATRO	Tue, Dec 9, 2003	2.29	2.56	2.29	2.51
2883	NASDAQ	ATRO	Mon, Dec 8, 2003	2.46	2.49	2.35	2.49
2882	NASDAQ	ATRO	Fri, Dec 5, 2003	2.28	2.48	2.28	2.41
2881	NASDAQ	ATRO	Thu, Dec 4, 2003	2.22	2.28	2.22	2.28
2880	NASDAQ	ATRO	Wed, Dec 3, 2003	2.18	2.28	2.17	2.21
2879	NASDAQ	ATRO	Tue, Dec 2, 2003	2.17	2.24	2.17	2.24
2878	NASDAQ	ATRO	Mon, Dec 1, 2003	2.20	2.33	2.17	2.21
2877	NASDAQ	ATRO	Fri, Nov 28, 2003	2.28	2.28	2.28	2.28
2876	NASDAQ	ATRO	Wed, Nov 26, 2003	2.20	2.43	2.20	2.27
2875	NASDAQ	ATRO	Tue, Nov 25, 2003	2.26	2.44	2.26	2.32
2874	NASDAQ	ATRO	Mon, Nov 24, 2003	2.46	2.46	2.26	2.33
2873	NASDAQ	ATRO	Fri, Nov 21, 2003	2.30	2.46	2.28	2.45
2872	NASDAQ	ATRO	Thu, Nov 20, 2003	2.24	2.31	2.24	2.28
2871	NASDAQ	ATRO	Wed, Nov 19, 2003	2.33	2.34	2.13	2.21
2870	NASDAQ	ATRO	Tue, Nov 18, 2003	2.34	2.37	2.28	2.28
2869	NASDAQ	ATRO	Mon, Nov 17, 2003	2.40	2.44	2.32	2.44
2868	NASDAQ	ATRO	Fri, Nov 14, 2003	2.32	2.39	2.26	2.29
2867	NASDAQ	ATRO	Thu, Nov 13, 2003	2.38	2.42	2.26	2.26
2866	NASDAQ	ATRO	Wed, Nov 12, 2003	2.38	2.49	2.28	2.29
2865	NASDAQ	ATRO	Tue, Nov 11, 2003	2.28	2.35	2.26	2.27
2864	NASDAQ	ATRO	Mon, Nov 10, 2003	2.50	2.53	2.28	2.28
2863	NASDAQ	ATRO	Fri, Nov 7, 2003	2.51	2.56	2.35	2.42
2862	NASDAQ	ATRO	Thu, Nov 6, 2003	2.49	2.53	2.49	2.49
2861	NASDAQ	ATRO	Wed, Nov 5, 2003	2.37	2.51	2.37	2.49
2860	NASDAQ	ATRO	Tue, Nov 4, 2003	2.35	2.50	2.35	2.38
2859	NASDAQ	ATRO	Mon, Nov 3, 2003	2.63	2.63	2.35	2.49
2858	NASDAQ	ATRO	Fri, Oct 31, 2003	2.37	2.76	2.29	2.74
2857	NASDAQ	ATRO	Thu, Oct 30, 2003	2.16	2.47	2.16	2.29
2856	NASDAQ	ATRO	Wed, Oct 29, 2003	2.06	2.24	2.00	2.22
2855	NASDAQ	ATRO	Tue, Oct 28, 2003	2.05	2.13	2.01	2.01
2854	NASDAQ	ATRO	Mon, Oct 27, 2003	2.00	2.05	1.92	1.96
2853	NASDAQ	ATRO	Fri, Oct 24, 2003	1.96	2.08	1.96	1.96
2852	NASDAQ	ATRO	Thu, Oct 23, 2003	1.94	1.96	1.89	1.96
2851	NASDAQ	ATRO	Wed, Oct 22, 2003	1.89	1.96	1.89	1.89
2850	NASDAQ	ATRO	Tue, Oct 21, 2003	1.95	1.96	1.87	1.87
2849	NASDAQ	ATRO	Mon, Oct 20, 2003	1.89	1.94	1.87	1.91
2848	NASDAQ	ATRO	Fri, Oct 17, 2003	1.92	1.92	1.79	1.92
2847	NASDAQ	ATRO	Thu, Oct 16, 2003	1.78	1.94	1.78	1.89
2846	NASDAQ	ATRO	Wed, Oct 15, 2003	1.90	1.97	1.82	1.85
2845	NASDAQ	ATRO	Tue, Oct 14, 2003	1.87	1.87	1.76	1.87
2844	NASDAQ	ATRO	Mon, Oct 13, 2003	1.72	1.90	1.72	1.87
2843	NASDAQ	ATRO	Fri, Oct 10, 2003	1.88	1.88	1.80	1.80
2842	NASDAQ	ATRO	Thu, Oct 9, 2003	1.78	1.96	1.78	1.87
2841	NASDAQ	ATRO	Wed, Oct 8, 2003	1.71	1.94	1.71	1.82
2840	NASDAQ	ATRO	Tue, Oct 7, 2003	1.83	1.87	1.76	1.79
2839	NASDAQ	ATRO	Mon, Oct 6, 2003	1.84	1.89	1.78	1.89
2838	NASDAQ	ATRO	Fri, Oct 3, 2003	1.86	1.89	1.86	1.89
2837	NASDAQ	ATRO	Thu, Oct 2, 2003	1.80	1.93	1.79	1.85
2836	NASDAQ	ATRO	Wed, Oct 1, 2003	1.83	1.83	1.77	1.77
2835	NASDAQ	ATRO	Tue, Sep 30, 2003	1.80	1.89	1.64	1.83
2834	NASDAQ	ATRO	Mon, Sep 29, 2003	1.79	1.95	1.79	1.84
2833	NASDAQ	ATRO	Fri, Sep 26, 2003	1.87	1.97	1.81	1.87
2832	NASDAQ	ATRO	Thu, Sep 25, 2003	1.85	2.00	1.80	1.83
2831	NASDAQ	ATRO	Wed, Sep 24, 2003	1.78	2.05	1.78	2.01
2830	NASDAQ	ATRO	Tue, Sep 23, 2003	1.90	1.94	1.84	1.86
2829	NASDAQ	ATRO	Mon, Sep 22, 2003	1.81	1.90	1.81	1.90
2828	NASDAQ	ATRO	Fri, Sep 19, 2003	1.91	1.91	1.74	1.81
2827	NASDAQ	ATRO	Thu, Sep 18, 2003	1.91	1.91	1.85	1.85
2826	NASDAQ	ATRO	Wed, Sep 17, 2003	1.86	1.91	1.86	1.91
2825	NASDAQ	ATRO	Tue, Sep 16, 2003	1.79	1.85	1.79	1.80
2824	NASDAQ	ATRO	Mon, Sep 15, 2003	1.82	1.89	1.78	1.86
2823	NASDAQ	ATRO	Fri, Sep 12, 2003	1.78	1.78	1.78	1.78
2822	NASDAQ	ATRO	Thu, Sep 11, 2003	1.75	1.79	1.75	1.78
2821	NASDAQ	ATRO	Wed, Sep 10, 2003	1.83	1.85	1.70	1.75
2820	NASDAQ	ATRO	Tue, Sep 9, 2003	1.71	1.87	1.71	1.87
2819	NASDAQ	ATRO	Mon, Sep 8, 2003	1.94	1.94	1.78	1.88
2818	NASDAQ	ATRO	Fri, Sep 5, 2003	1.93	1.94	1.84	1.94
2817	NASDAQ	ATRO	Thu, Sep 4, 2003	1.90	1.94	1.76	1.94
2816	NASDAQ	ATRO	Wed, Sep 3, 2003	2.03	2.03	2.03	2.03
2815	NASDAQ	ATRO	Tue, Sep 2, 2003	2.24	2.24	1.90	1.92
2814	NASDAQ	ATRO	Fri, Aug 29, 2003	1.83	2.15	1.83	2.03
2813	NASDAQ	ATRO	Thu, Aug 28, 2003	1.80	1.92	1.74	1.76
2812	NASDAQ	ATRO	Wed, Aug 27, 2003	1.73	1.78	1.73	1.78
2811	NASDAQ	ATRO	Tue, Aug 26, 2003	1.70	1.73	1.70	1.73
2810	NASDAQ	ATRO	Mon, Aug 25, 2003	1.67	1.73	1.67	1.73
2809	NASDAQ	ATRO	Fri, Aug 22, 2003	1.70	1.70	1.70	1.70
2808	NASDAQ	ATRO	Thu, Aug 21, 2003	1.73	1.73	1.70	1.73
2807	NASDAQ	ATRO	Wed, Aug 20, 2003	1.73	1.73	1.73	1.73
2806	NASDAQ	ATRO	Tue, Aug 19, 2003	1.67	1.73	1.67	1.73
2805	NASDAQ	ATRO	Mon, Aug 18, 2003	1.67	1.71	1.67	1.71
2804	NASDAQ	ATRO	Thu, Aug 14, 2003	1.69	1.71	1.69	1.69
2803	NASDAQ	ATRO	Wed, Aug 13, 2003	1.71	1.73	1.71	1.73
2802	NASDAQ	ATRO	Tue, Aug 12, 2003	1.71	1.71	1.69	1.69
2801	NASDAQ	ATRO	Mon, Aug 11, 2003	1.87	1.87	1.69	1.78
2800	NASDAQ	ATRO	Fri, Aug 8, 2003	1.87	1.89	1.87	1.89
2799	NASDAQ	ATRO	Wed, Aug 6, 2003	1.74	1.79	1.74	1.79
2798	NASDAQ	ATRO	Tue, Aug 5, 2003	1.74	1.89	1.74	1.74
2797	NASDAQ	ATRO	Mon, Aug 4, 2003	1.74	1.89	1.74	1.83
2796	NASDAQ	ATRO	Fri, Aug 1, 2003	1.74	1.80	1.74	1.80
2795	NASDAQ	ATRO	Thu, Jul 31, 2003	1.78	1.78	1.74	1.74
2794	NASDAQ	ATRO	Wed, Jul 30, 2003	1.74	1.81	1.71	1.81
2793	NASDAQ	ATRO	Tue, Jul 29, 2003	1.74	1.81	1.72	1.81
2792	NASDAQ	ATRO	Mon, Jul 28, 2003	1.94	1.94	1.71	1.72
2791	NASDAQ	ATRO	Fri, Jul 25, 2003	1.96	1.96	1.90	1.95
2790	NASDAQ	ATRO	Thu, Jul 24, 2003	2.04	2.04	1.90	1.97
2789	NASDAQ	ATRO	Wed, Jul 23, 2003	2.09	2.09	2.05	2.05
2788	NASDAQ	ATRO	Tue, Jul 22, 2003	2.14	2.16	2.14	2.16
2787	NASDAQ	ATRO	Mon, Jul 21, 2003	2.19	2.19	2.07	2.07
2786	NASDAQ	ATRO	Fri, Jul 18, 2003	1.77	2.26	1.77	2.17
2785	NASDAQ	ATRO	Thu, Jul 17, 2003	1.94	1.94	1.66	1.72
2784	NASDAQ	ATRO	Wed, Jul 16, 2003	1.58	1.87	1.57	1.87
2783	NASDAQ	ATRO	Tue, Jul 15, 2003	1.53	1.56	1.48	1.54
2782	NASDAQ	ATRO	Mon, Jul 14, 2003	1.51	1.56	1.51	1.51
2781	NASDAQ	ATRO	Fri, Jul 11, 2003	1.54	1.62	1.51	1.57
2780	NASDAQ	ATRO	Thu, Jul 10, 2003	1.51	1.62	1.51	1.55
2779	NASDAQ	ATRO	Wed, Jul 9, 2003	1.43	1.46	1.43	1.46
2778	NASDAQ	ATRO	Tue, Jul 8, 2003	1.51	1.51	1.44	1.44
2777	NASDAQ	ATRO	Mon, Jul 7, 2003	1.50	1.50	1.48	1.50
2776	NASDAQ	ATRO	Thu, Jul 3, 2003	1.47	1.48	1.47	1.48
2775	NASDAQ	ATRO	Wed, Jul 2, 2003	1.47	1.47	1.47	1.47
2774	NASDAQ	ATRO	Tue, Jul 1, 2003	1.47	1.69	1.47	1.47
2773	NASDAQ	ATRO	Mon, Jun 30, 2003	1.55	1.55	1.47	1.48
2772	NASDAQ	ATRO	Fri, Jun 27, 2003	1.51	1.51	1.47	1.51
2771	NASDAQ	ATRO	Thu, Jun 26, 2003	1.51	1.51	1.48	1.48
2770	NASDAQ	ATRO	Wed, Jun 25, 2003	1.52	1.52	1.51	1.52
2769	NASDAQ	ATRO	Tue, Jun 24, 2003	1.54	1.57	1.54	1.57
2768	NASDAQ	ATRO	Mon, Jun 23, 2003	1.71	1.71	1.52	1.52
2767	NASDAQ	ATRO	Fri, Jun 20, 2003	1.54	1.74	1.48	1.63
2766	NASDAQ	ATRO	Thu, Jun 19, 2003	1.52	1.54	1.48	1.51
2765	NASDAQ	ATRO	Wed, Jun 18, 2003	1.48	1.48	1.41	1.48
2764	NASDAQ	ATRO	Tue, Jun 17, 2003	1.48	1.53	1.48	1.51
2763	NASDAQ	ATRO	Mon, Jun 16, 2003	1.46	1.83	1.41	1.46
2762	NASDAQ	ATRO	Fri, Jun 13, 2003	1.53	1.53	1.48	1.51
2761	NASDAQ	ATRO	Thu, Jun 12, 2003	1.53	1.53	1.48	1.48
2760	NASDAQ	ATRO	Wed, Jun 11, 2003	1.51	1.53	1.48	1.53
2759	NASDAQ	ATRO	Tue, Jun 10, 2003	1.51	1.52	1.51	1.52
2758	NASDAQ	ATRO	Mon, Jun 9, 2003	1.51	1.54	1.47	1.48
2757	NASDAQ	ATRO	Fri, Jun 6, 2003	1.53	1.58	1.51	1.51
2756	NASDAQ	ATRO	Thu, Jun 5, 2003	1.51	1.55	1.51	1.52
2755	NASDAQ	ATRO	Wed, Jun 4, 2003	1.51	1.52	1.51	1.52
2754	NASDAQ	ATRO	Tue, Jun 3, 2003	1.49	1.52	1.49	1.52
2753	NASDAQ	ATRO	Mon, Jun 2, 2003	1.48	1.55	1.48	1.51
2752	NASDAQ	ATRO	Fri, May 30, 2003	1.48	1.53	1.48	1.51
2751	NASDAQ	ATRO	Thu, May 29, 2003	1.48	1.53	1.48	1.50
2750	NASDAQ	ATRO	Wed, May 28, 2003	1.48	1.55	1.48	1.51
2749	NASDAQ	ATRO	Tue, May 27, 2003	1.48	1.48	1.48	1.48
2748	NASDAQ	ATRO	Fri, May 23, 2003	1.44	1.48	1.44	1.48
2747	NASDAQ	ATRO	Thu, May 22, 2003	1.54	1.54	1.46	1.46
2746	NASDAQ	ATRO	Wed, May 21, 2003	1.42	1.51	1.42	1.51
2745	NASDAQ	ATRO	Tue, May 20, 2003	1.70	1.70	1.47	1.51
2744	NASDAQ	ATRO	Mon, May 19, 2003	1.50	1.52	1.47	1.50
2743	NASDAQ	ATRO	Fri, May 16, 2003	1.53	1.58	1.42	1.51
2742	NASDAQ	ATRO	Thu, May 15, 2003	1.52	1.54	1.51	1.54
2741	NASDAQ	ATRO	Wed, May 14, 2003	1.49	1.52	1.49	1.49
2740	NASDAQ	ATRO	Tue, May 13, 2003	1.44	1.44	1.44	1.44
2739	NASDAQ	ATRO	Mon, May 12, 2003	1.53	1.53	1.39	1.46
2738	NASDAQ	ATRO	Fri, May 9, 2003	1.52	1.58	1.52	1.58
2737	NASDAQ	ATRO	Thu, May 8, 2003	1.60	1.60	1.51	1.58
2736	NASDAQ	ATRO	Wed, May 7, 2003	1.64	1.64	1.55	1.55
2735	NASDAQ	ATRO	Tue, May 6, 2003	1.44	1.62	1.44	1.59
2734	NASDAQ	ATRO	Mon, May 5, 2003	1.37	1.46	1.37	1.46
2733	NASDAQ	ATRO	Fri, May 2, 2003	1.48	1.55	1.45	1.51
2732	NASDAQ	ATRO	Thu, May 1, 2003	1.58	1.60	1.58	1.58
2731	NASDAQ	ATRO	Wed, Apr 30, 2003	1.58	1.60	1.58	1.60
2730	NASDAQ	ATRO	Tue, Apr 29, 2003	1.60	1.61	1.60	1.60
2729	NASDAQ	ATRO	Mon, Apr 28, 2003	1.60	1.62	1.60	1.60
2728	NASDAQ	ATRO	Fri, Apr 25, 2003	1.60	1.64	1.53	1.60
2727	NASDAQ	ATRO	Thu, Apr 24, 2003	1.64	1.67	1.53	1.60
2726	NASDAQ	ATRO	Wed, Apr 23, 2003	1.64	1.65	1.64	1.65
2725	NASDAQ	ATRO	Tue, Apr 22, 2003	1.60	1.67	1.60	1.67
2724	NASDAQ	ATRO	Mon, Apr 21, 2003	1.60	1.67	1.60	1.60
2723	NASDAQ	ATRO	Wed, Apr 16, 2003	1.60	1.60	1.60	1.60
2722	NASDAQ	ATRO	Tue, Apr 15, 2003	1.60	1.60	1.60	1.60
2721	NASDAQ	ATRO	Mon, Apr 14, 2003	1.60	1.60	1.60	1.60
2720	NASDAQ	ATRO	Fri, Apr 11, 2003	1.60	1.62	1.60	1.62
2719	NASDAQ	ATRO	Thu, Apr 10, 2003	1.60	1.61	1.55	1.61
2718	NASDAQ	ATRO	Wed, Apr 9, 2003	1.60	1.62	1.60	1.61
2717	NASDAQ	ATRO	Tue, Apr 8, 2003	1.55	1.69	1.55	1.61
2716	NASDAQ	ATRO	Mon, Apr 7, 2003	1.60	1.63	1.60	1.60
2715	NASDAQ	ATRO	Fri, Apr 4, 2003	1.67	1.70	1.58	1.60
2714	NASDAQ	ATRO	Thu, Apr 3, 2003	1.96	1.96	1.60	1.67
2713	NASDAQ	ATRO	Wed, Apr 2, 2003	1.84	1.94	1.74	1.74
2712	NASDAQ	ATRO	Tue, Apr 1, 2003	1.67	1.67	1.67	1.67
2711	NASDAQ	ATRO	Mon, Mar 31, 2003	1.73	1.73	1.67	1.67
2710	NASDAQ	ATRO	Fri, Mar 28, 2003	1.74	1.74	1.74	1.74
2709	NASDAQ	ATRO	Thu, Mar 27, 2003	1.68	1.68	1.65	1.67
2708	NASDAQ	ATRO	Wed, Mar 26, 2003	1.83	1.83	1.67	1.68
2707	NASDAQ	ATRO	Tue, Mar 25, 2003	1.68	1.89	1.68	1.71
2706	NASDAQ	ATRO	Mon, Mar 24, 2003	1.71	1.89	1.67	1.84
2705	NASDAQ	ATRO	Fri, Mar 21, 2003	2.00	2.00	1.69	2.00
2704	NASDAQ	ATRO	Thu, Mar 20, 2003	2.07	2.20	1.99	2.05
2703	NASDAQ	ATRO	Wed, Mar 19, 2003	1.94	2.19	1.94	1.99
2702	NASDAQ	ATRO	Tue, Mar 18, 2003	2.51	2.65	1.94	2.10
2701	NASDAQ	ATRO	Mon, Mar 17, 2003	2.28	2.28	1.92	2.17
2700	NASDAQ	ATRO	Fri, Mar 14, 2003	2.78	2.91	2.74	2.83
2699	NASDAQ	ATRO	Thu, Mar 13, 2003	2.66	2.77	2.65	2.69
2698	NASDAQ	ATRO	Wed, Mar 12, 2003	2.81	2.81	2.69	2.69
2697	NASDAQ	ATRO	Tue, Mar 11, 2003	2.81	2.81	2.81	2.81
2696	NASDAQ	ATRO	Mon, Mar 10, 2003	2.82	2.82	2.81	2.81
2695	NASDAQ	ATRO	Fri, Mar 7, 2003	2.82	2.84	2.82	2.84
2694	NASDAQ	ATRO	Thu, Mar 6, 2003	2.84	2.85	2.81	2.81
2693	NASDAQ	ATRO	Wed, Mar 5, 2003	2.83	2.83	2.76	2.77
2692	NASDAQ	ATRO	Tue, Mar 4, 2003	2.82	2.85	2.82	2.85
2691	NASDAQ	ATRO	Fri, Feb 28, 2003	2.81	2.81	2.81	2.81
2690	NASDAQ	ATRO	Wed, Feb 26, 2003	2.91	2.92	2.86	2.86
2689	NASDAQ	ATRO	Tue, Feb 25, 2003	2.81	2.90	2.81	2.88
2688	NASDAQ	ATRO	Mon, Feb 24, 2003	2.88	2.88	2.79	2.79
2687	NASDAQ	ATRO	Fri, Feb 21, 2003	2.88	2.90	2.79	2.84
2686	NASDAQ	ATRO	Thu, Feb 20, 2003	2.95	2.96	2.92	2.92
2685	NASDAQ	ATRO	Wed, Feb 19, 2003	2.90	2.96	2.83	2.89
2684	NASDAQ	ATRO	Tue, Feb 18, 2003	2.82	2.91	2.74	2.91
2683	NASDAQ	ATRO	Fri, Feb 14, 2003	2.90	2.90	2.83	2.90
2682	NASDAQ	ATRO	Thu, Feb 13, 2003	3.01	3.01	2.74	2.92
2681	NASDAQ	ATRO	Wed, Feb 12, 2003	2.96	2.96	2.76	2.80
2680	NASDAQ	ATRO	Tue, Feb 11, 2003	2.93	2.93	2.93	2.93
2679	NASDAQ	ATRO	Mon, Feb 10, 2003	3.09	3.10	2.94	2.94
2678	NASDAQ	ATRO	Fri, Feb 7, 2003	2.97	3.07	2.97	3.07
2677	NASDAQ	ATRO	Thu, Feb 6, 2003	2.93	3.01	2.91	3.01
2676	NASDAQ	ATRO	Wed, Feb 5, 2003	2.95	2.98	2.92	2.95
2675	NASDAQ	ATRO	Tue, Feb 4, 2003	2.81	2.91	2.81	2.91
2674	NASDAQ	ATRO	Mon, Feb 3, 2003	2.85	2.86	2.83	2.85
2673	NASDAQ	ATRO	Fri, Jan 31, 2003	2.65	2.97	2.65	2.91
2672	NASDAQ	ATRO	Thu, Jan 30, 2003	2.70	2.81	2.69	2.79
2671	NASDAQ	ATRO	Wed, Jan 29, 2003	2.93	2.97	2.59	2.59
2670	NASDAQ	ATRO	Tue, Jan 28, 2003	2.96	2.97	2.81	2.95
2669	NASDAQ	ATRO	Mon, Jan 27, 2003	2.98	2.98	2.97	2.97
2668	NASDAQ	ATRO	Fri, Jan 24, 2003	2.96	2.97	2.96	2.97
2667	NASDAQ	ATRO	Wed, Jan 22, 2003	3.04	3.04	2.97	3.02
2666	NASDAQ	ATRO	Tue, Jan 21, 2003	3.14	3.14	3.06	3.06
2665	NASDAQ	ATRO	Fri, Jan 17, 2003	3.20	3.20	3.20	3.20
2664	NASDAQ	ATRO	Wed, Jan 15, 2003	3.20	3.20	3.20	3.20
2663	NASDAQ	ATRO	Tue, Jan 14, 2003	3.20	3.20	3.15	3.15
2662	NASDAQ	ATRO	Mon, Jan 13, 2003	3.16	3.20	3.12	3.20
2661	NASDAQ	ATRO	Fri, Jan 10, 2003	2.89	3.16	2.89	3.16
2660	NASDAQ	ATRO	Thu, Jan 9, 2003	2.97	3.13	2.97	2.97
2659	NASDAQ	ATRO	Wed, Jan 8, 2003	2.96	2.97	2.93	2.95
2658	NASDAQ	ATRO	Tue, Jan 7, 2003	3.15	3.15	2.75	2.86
2657	NASDAQ	ATRO	Mon, Jan 6, 2003	2.92	3.19	2.92	3.04
2656	NASDAQ	ATRO	Thu, Jan 2, 2003	3.16	3.16	3.15	3.15
2655	NASDAQ	ATRO	Tue, Dec 31, 2002	2.89	3.15	2.89	3.15
2654	NASDAQ	ATRO	Mon, Dec 30, 2002	2.95	2.95	2.90	2.92
2653	NASDAQ	ATRO	Fri, Dec 27, 2002	2.99	3.04	2.88	2.93
2652	NASDAQ	ATRO	Thu, Dec 26, 2002	3.13	3.13	2.79	2.98
2651	NASDAQ	ATRO	Tue, Dec 24, 2002	3.09	3.09	3.08	3.09
2650	NASDAQ	ATRO	Mon, Dec 23, 2002	3.09	3.09	3.09	3.09
2649	NASDAQ	ATRO	Fri, Dec 20, 2002	3.16	3.20	3.06	3.17
2648	NASDAQ	ATRO	Thu, Dec 19, 2002	3.06	3.20	3.06	3.20
2647	NASDAQ	ATRO	Wed, Dec 18, 2002	3.01	3.08	3.01	3.06
2646	NASDAQ	ATRO	Tue, Dec 17, 2002	3.06	3.06	3.06	3.06
2645	NASDAQ	ATRO	Mon, Dec 16, 2002	3.05	3.08	2.97	3.05
2644	NASDAQ	ATRO	Fri, Dec 13, 2002	2.85	3.07	2.85	2.96
2643	NASDAQ	ATRO	Thu, Dec 12, 2002	2.85	3.04	2.82	2.98
2642	NASDAQ	ATRO	Wed, Dec 11, 2002	2.82	2.83	2.79	2.82
2641	NASDAQ	ATRO	Tue, Dec 10, 2002	2.81	2.83	2.81	2.82
2640	NASDAQ	ATRO	Mon, Dec 9, 2002	2.82	2.84	2.81	2.82
2639	NASDAQ	ATRO	Fri, Dec 6, 2002	2.85	2.85	2.82	2.82
2638	NASDAQ	ATRO	Thu, Dec 5, 2002	2.85	2.86	2.85	2.86
2637	NASDAQ	ATRO	Wed, Dec 4, 2002	2.86	2.92	2.86	2.86
2636	NASDAQ	ATRO	Tue, Dec 3, 2002	2.93	2.93	2.86	2.86
2635	NASDAQ	ATRO	Mon, Dec 2, 2002	2.93	2.97	2.93	2.97
2634	NASDAQ	ATRO	Fri, Nov 29, 2002	3.10	3.10	2.90	2.93
2633	NASDAQ	ATRO	Wed, Nov 27, 2002	3.05	3.05	2.83	2.92
2632	NASDAQ	ATRO	Tue, Nov 26, 2002	2.97	2.97	2.86	2.91
2631	NASDAQ	ATRO	Mon, Nov 25, 2002	3.11	3.11	3.10	3.10
2630	NASDAQ	ATRO	Fri, Nov 22, 2002	3.21	3.28	2.92	3.10
2629	NASDAQ	ATRO	Thu, Nov 21, 2002	3.24	3.29	3.15	3.21
2628	NASDAQ	ATRO	Wed, Nov 20, 2002	3.24	3.24	3.12	3.17
2627	NASDAQ	ATRO	Mon, Nov 18, 2002	3.23	3.29	3.11	3.22
2626	NASDAQ	ATRO	Fri, Nov 15, 2002	3.37	3.37	3.13	3.23
2625	NASDAQ	ATRO	Thu, Nov 14, 2002	3.42	3.42	3.37	3.37
2624	NASDAQ	ATRO	Wed, Nov 13, 2002	3.49	3.65	3.09	3.42
2623	NASDAQ	ATRO	Tue, Nov 12, 2002	3.13	3.21	3.09	3.09
2622	NASDAQ	ATRO	Mon, Nov 11, 2002	3.24	3.24	2.90	2.90
2621	NASDAQ	ATRO	Fri, Nov 8, 2002	3.44	3.44	3.21	3.23
2620	NASDAQ	ATRO	Thu, Nov 7, 2002	2.84	3.64	2.84	3.24
2619	NASDAQ	ATRO	Wed, Nov 6, 2002	2.81	3.10	2.79	2.83
2618	NASDAQ	ATRO	Tue, Nov 5, 2002	2.78	2.79	2.77	2.79
2617	NASDAQ	ATRO	Mon, Nov 4, 2002	2.85	2.85	2.82	2.84
2616	NASDAQ	ATRO	Fri, Nov 1, 2002	2.79	2.84	2.78	2.80
2615	NASDAQ	ATRO	Thu, Oct 31, 2002	2.79	2.81	2.79	2.81
2614	NASDAQ	ATRO	Wed, Oct 30, 2002	2.79	2.85	2.77	2.85
2613	NASDAQ	ATRO	Tue, Oct 29, 2002	2.76	2.79	2.76	2.79
2612	NASDAQ	ATRO	Mon, Oct 28, 2002	2.77	2.81	2.77	2.81
2611	NASDAQ	ATRO	Fri, Oct 25, 2002	2.92	2.92	2.83	2.88
2610	NASDAQ	ATRO	Thu, Oct 24, 2002	3.10	3.10	2.84	2.99
2609	NASDAQ	ATRO	Wed, Oct 23, 2002	2.93	3.08	2.93	3.08
2608	NASDAQ	ATRO	Tue, Oct 22, 2002	2.84	2.93	2.84	2.93
2607	NASDAQ	ATRO	Mon, Oct 21, 2002	2.85	2.85	2.82	2.83
2606	NASDAQ	ATRO	Fri, Oct 18, 2002	2.70	2.70	2.67	2.67
2605	NASDAQ	ATRO	Thu, Oct 17, 2002	2.82	2.83	2.68	2.68
2604	NASDAQ	ATRO	Wed, Oct 16, 2002	2.85	2.85	2.67	2.75
2603	NASDAQ	ATRO	Tue, Oct 15, 2002	2.68	2.85	2.67	2.85
2602	NASDAQ	ATRO	Mon, Oct 14, 2002	2.67	2.67	2.67	2.67
2601	NASDAQ	ATRO	Fri, Oct 11, 2002	2.67	2.73	2.67	2.67
2600	NASDAQ	ATRO	Thu, Oct 10, 2002	2.79	2.79	2.65	2.67
2599	NASDAQ	ATRO	Wed, Oct 9, 2002	2.92	2.97	2.79	2.81
2598	NASDAQ	ATRO	Tue, Oct 8, 2002	2.90	2.90	2.79	2.89
2597	NASDAQ	ATRO	Mon, Oct 7, 2002	3.01	3.01	2.99	2.99
2596	NASDAQ	ATRO	Fri, Oct 4, 2002	3.00	3.04	2.99	3.04
2595	NASDAQ	ATRO	Thu, Oct 3, 2002	3.13	3.13	2.97	2.97
2594	NASDAQ	ATRO	Wed, Oct 2, 2002	3.22	3.22	3.13	3.15
2593	NASDAQ	ATRO	Tue, Oct 1, 2002	3.18	3.28	3.17	3.28
2592	NASDAQ	ATRO	Mon, Sep 30, 2002	3.20	3.21	3.14	3.21
2591	NASDAQ	ATRO	Fri, Sep 27, 2002	3.02	3.26	3.02	3.20
2590	NASDAQ	ATRO	Thu, Sep 26, 2002	2.95	3.24	2.95	3.06
2589	NASDAQ	ATRO	Wed, Sep 25, 2002	2.84	3.17	2.84	3.01
2588	NASDAQ	ATRO	Tue, Sep 24, 2002	2.81	2.82	2.81	2.82
2587	NASDAQ	ATRO	Mon, Sep 23, 2002	2.76	2.76	2.74	2.76
2586	NASDAQ	ATRO	Fri, Sep 20, 2002	2.79	2.81	2.67	2.67
2585	NASDAQ	ATRO	Thu, Sep 19, 2002	2.76	2.81	2.76	2.80
2584	NASDAQ	ATRO	Wed, Sep 18, 2002	2.76	2.79	2.51	2.77
2583	NASDAQ	ATRO	Tue, Sep 17, 2002	2.77	2.81	2.74	2.76
2582	NASDAQ	ATRO	Mon, Sep 16, 2002	2.85	2.85	2.77	2.81
2581	NASDAQ	ATRO	Fri, Sep 13, 2002	2.82	2.84	2.82	2.83
2580	NASDAQ	ATRO	Thu, Sep 12, 2002	2.94	2.94	2.85	2.85
2579	NASDAQ	ATRO	Wed, Sep 11, 2002	2.99	3.00	2.98	2.98
2578	NASDAQ	ATRO	Tue, Sep 10, 2002	2.84	2.87	2.83	2.83
2577	NASDAQ	ATRO	Mon, Sep 9, 2002	2.74	2.95	2.69	2.83
2576	NASDAQ	ATRO	Fri, Sep 6, 2002	3.06	3.15	2.74	2.74
2575	NASDAQ	ATRO	Thu, Sep 5, 2002	3.20	3.20	2.72	2.85
2574	NASDAQ	ATRO	Wed, Sep 4, 2002	3.20	3.29	3.20	3.26
2573	NASDAQ	ATRO	Tue, Sep 3, 2002	3.32	3.42	3.21	3.31
2572	NASDAQ	ATRO	Fri, Aug 30, 2002	3.37	3.37	3.34	3.34
2571	NASDAQ	ATRO	Thu, Aug 29, 2002	3.38	3.38	3.33	3.33
2570	NASDAQ	ATRO	Wed, Aug 28, 2002	3.34	3.45	3.34	3.37
2569	NASDAQ	ATRO	Tue, Aug 27, 2002	3.49	3.49	3.25	3.31
2568	NASDAQ	ATRO	Mon, Aug 26, 2002	3.47	3.47	3.22	3.45
2567	NASDAQ	ATRO	Fri, Aug 23, 2002	3.47	3.53	3.47	3.47
2566	NASDAQ	ATRO	Thu, Aug 22, 2002	3.52	3.52	3.52	3.52
2565	NASDAQ	ATRO	Wed, Aug 21, 2002	3.45	3.49	3.45	3.47
2564	NASDAQ	ATRO	Tue, Aug 20, 2002	3.54	3.54	3.45	3.45
2563	NASDAQ	ATRO	Mon, Aug 19, 2002	3.52	3.64	3.52	3.52
2562	NASDAQ	ATRO	Fri, Aug 16, 2002	3.51	3.52	3.51	3.52
2561	NASDAQ	ATRO	Thu, Aug 15, 2002	3.47	3.57	3.45	3.57
2560	NASDAQ	ATRO	Wed, Aug 14, 2002	3.42	3.47	3.42	3.47
2559	NASDAQ	ATRO	Tue, Aug 13, 2002	3.47	3.47	3.42	3.42
2558	NASDAQ	ATRO	Mon, Aug 12, 2002	3.52	3.53	3.48	3.50
2557	NASDAQ	ATRO	Fri, Aug 9, 2002	3.52	3.58	3.52	3.53
2556	NASDAQ	ATRO	Thu, Aug 8, 2002	3.43	3.45	3.43	3.45
2555	NASDAQ	ATRO	Wed, Aug 7, 2002	3.56	3.65	3.49	3.49
2554	NASDAQ	ATRO	Tue, Aug 6, 2002	3.47	3.47	3.42	3.45
2553	NASDAQ	ATRO	Mon, Aug 5, 2002	3.43	3.43	3.38	3.38
2552	NASDAQ	ATRO	Fri, Aug 2, 2002	3.52	3.52	3.42	3.42
2551	NASDAQ	ATRO	Thu, Aug 1, 2002	3.52	3.56	3.52	3.52
2550	NASDAQ	ATRO	Wed, Jul 31, 2002	3.52	3.52	3.52	3.52
2549	NASDAQ	ATRO	Tue, Jul 30, 2002	3.47	3.54	3.46	3.52
2548	NASDAQ	ATRO	Mon, Jul 29, 2002	3.38	3.52	3.38	3.43
2547	NASDAQ	ATRO	Fri, Jul 26, 2002	3.51	3.52	3.39	3.39
2546	NASDAQ	ATRO	Thu, Jul 25, 2002	3.47	3.52	3.42	3.52
2545	NASDAQ	ATRO	Wed, Jul 24, 2002	3.54	3.54	3.47	3.47
2544	NASDAQ	ATRO	Tue, Jul 23, 2002	3.52	3.58	3.52	3.52
2543	NASDAQ	ATRO	Mon, Jul 22, 2002	3.47	3.53	3.47	3.53
2542	NASDAQ	ATRO	Fri, Jul 19, 2002	3.56	3.56	3.52	3.52
2541	NASDAQ	ATRO	Thu, Jul 18, 2002	3.56	3.56	3.56	3.56
2540	NASDAQ	ATRO	Wed, Jul 17, 2002	3.65	3.65	3.56	3.56
2539	NASDAQ	ATRO	Tue, Jul 16, 2002	3.53	3.56	3.52	3.56
2538	NASDAQ	ATRO	Mon, Jul 15, 2002	3.50	3.61	3.50	3.61
2537	NASDAQ	ATRO	Fri, Jul 12, 2002	3.48	3.62	3.48	3.61
2536	NASDAQ	ATRO	Thu, Jul 11, 2002	3.65	3.65	3.49	3.64
2535	NASDAQ	ATRO	Wed, Jul 10, 2002	3.70	3.72	3.58	3.65
2534	NASDAQ	ATRO	Tue, Jul 9, 2002	3.70	3.70	3.70	3.70
2533	NASDAQ	ATRO	Mon, Jul 8, 2002	3.70	3.76	3.70	3.76
2532	NASDAQ	ATRO	Fri, Jul 5, 2002	3.74	3.75	3.73	3.74
2531	NASDAQ	ATRO	Wed, Jul 3, 2002	3.86	3.89	3.74	3.74
2530	NASDAQ	ATRO	Tue, Jul 2, 2002	3.61	3.90	3.58	3.86
2529	NASDAQ	ATRO	Mon, Jul 1, 2002	3.65	3.65	3.47	3.64
2528	NASDAQ	ATRO	Fri, Jun 28, 2002	3.65	3.76	3.44	3.65
2527	NASDAQ	ATRO	Thu, Jun 27, 2002	3.75	3.79	3.58	3.72
2526	NASDAQ	ATRO	Wed, Jun 26, 2002	3.89	3.91	3.84	3.84
2525	NASDAQ	ATRO	Tue, Jun 25, 2002	4.00	4.00	3.89	3.89
2524	NASDAQ	ATRO	Mon, Jun 24, 2002	3.97	3.97	3.89	3.93
2523	NASDAQ	ATRO	Fri, Jun 21, 2002	4.04	4.04	3.97	3.97
2522	NASDAQ	ATRO	Thu, Jun 20, 2002	4.04	4.04	4.04	4.04
2521	NASDAQ	ATRO	Wed, Jun 19, 2002	4.06	4.06	4.00	4.02
2520	NASDAQ	ATRO	Tue, Jun 18, 2002	4.00	4.15	4.00	4.08
2519	NASDAQ	ATRO	Mon, Jun 17, 2002	3.95	4.04	3.82	4.00
2518	NASDAQ	ATRO	Fri, Jun 14, 2002	3.93	4.00	3.88	3.88
2517	NASDAQ	ATRO	Thu, Jun 13, 2002	4.06	4.06	3.91	3.95
2516	NASDAQ	ATRO	Wed, Jun 12, 2002	4.04	4.08	4.03	4.06
2515	NASDAQ	ATRO	Tue, Jun 11, 2002	4.05	4.11	4.03	4.03
2514	NASDAQ	ATRO	Mon, Jun 10, 2002	4.18	4.34	4.02	4.05
2513	NASDAQ	ATRO	Fri, Jun 7, 2002	4.11	4.11	4.11	4.11
2512	NASDAQ	ATRO	Thu, Jun 6, 2002	4.21	4.21	4.21	4.21
2511	NASDAQ	ATRO	Wed, Jun 5, 2002	4.06	4.34	4.02	4.21
2510	NASDAQ	ATRO	Tue, Jun 4, 2002	4.11	4.11	4.06	4.11
2509	NASDAQ	ATRO	Mon, Jun 3, 2002	4.22	4.22	4.09	4.11
2508	NASDAQ	ATRO	Fri, May 31, 2002	4.00	4.25	3.93	4.17
2507	NASDAQ	ATRO	Thu, May 30, 2002	4.16	4.16	4.00	4.02
2506	NASDAQ	ATRO	Wed, May 29, 2002	4.27	4.27	4.16	4.16
2505	NASDAQ	ATRO	Tue, May 28, 2002	4.25	4.25	4.25	4.25
2504	NASDAQ	ATRO	Fri, May 24, 2002	4.31	4.36	4.22	4.36
2503	NASDAQ	ATRO	Thu, May 23, 2002	4.31	4.34	4.31	4.32
2502	NASDAQ	ATRO	Wed, May 22, 2002	4.34	4.34	4.29	4.34
2501	NASDAQ	ATRO	Tue, May 21, 2002	4.20	4.54	4.20	4.32
2500	NASDAQ	ATRO	Mon, May 20, 2002	4.20	4.20	4.17	4.17
2499	NASDAQ	ATRO	Fri, May 17, 2002	4.25	4.25	4.21	4.21
2498	NASDAQ	ATRO	Thu, May 16, 2002	4.36	4.36	4.23	4.25
2497	NASDAQ	ATRO	Wed, May 15, 2002	4.43	4.44	4.36	4.36
2496	NASDAQ	ATRO	Tue, May 14, 2002	4.47	4.54	4.37	4.43
2495	NASDAQ	ATRO	Mon, May 13, 2002	4.36	4.50	4.36	4.45
2494	NASDAQ	ATRO	Fri, May 10, 2002	4.30	4.36	4.30	4.36
2493	NASDAQ	ATRO	Thu, May 9, 2002	4.27	4.30	4.25	4.25
2492	NASDAQ	ATRO	Wed, May 8, 2002	4.31	4.41	4.30	4.30
2491	NASDAQ	ATRO	Tue, May 7, 2002	4.34	4.34	4.30	4.30
2490	NASDAQ	ATRO	Mon, May 6, 2002	4.30	4.34	4.30	4.32
2489	NASDAQ	ATRO	Fri, May 3, 2002	4.32	4.38	4.32	4.34
2488	NASDAQ	ATRO	Thu, May 2, 2002	4.29	4.38	4.29	4.36
2487	NASDAQ	ATRO	Wed, May 1, 2002	4.29	4.38	4.27	4.31
2486	NASDAQ	ATRO	Tue, Apr 30, 2002	4.31	4.38	4.28	4.31
2485	NASDAQ	ATRO	Mon, Apr 29, 2002	4.34	4.45	4.34	4.34
2484	NASDAQ	ATRO	Fri, Apr 26, 2002	4.43	4.43	4.29	4.38
2483	NASDAQ	ATRO	Thu, Apr 25, 2002	4.40	4.43	4.40	4.43
2482	NASDAQ	ATRO	Wed, Apr 24, 2002	4.34	4.45	4.26	4.31
2481	NASDAQ	ATRO	Tue, Apr 23, 2002	4.23	4.39	4.22	4.39
2480	NASDAQ	ATRO	Mon, Apr 22, 2002	4.25	4.26	4.23	4.23
2479	NASDAQ	ATRO	Fri, Apr 19, 2002	4.18	4.22	4.18	4.20
2478	NASDAQ	ATRO	Thu, Apr 18, 2002	4.22	4.22	4.16	4.22
2477	NASDAQ	ATRO	Wed, Apr 17, 2002	4.42	4.42	4.20	4.22
2476	NASDAQ	ATRO	Tue, Apr 16, 2002	4.53	4.53	4.30	4.30
2475	NASDAQ	ATRO	Mon, Apr 15, 2002	4.42	4.42	4.34	4.42
2474	NASDAQ	ATRO	Fri, Apr 12, 2002	4.40	4.45	4.34	4.34
2473	NASDAQ	ATRO	Thu, Apr 11, 2002	4.27	4.41	4.26	4.31
2472	NASDAQ	ATRO	Wed, Apr 10, 2002	4.09	4.34	4.06	4.25
2471	NASDAQ	ATRO	Tue, Apr 9, 2002	4.13	4.15	4.09	4.09
2470	NASDAQ	ATRO	Mon, Apr 8, 2002	4.20	4.20	4.09	4.16
2469	NASDAQ	ATRO	Fri, Apr 5, 2002	4.38	4.38	4.16	4.20
2468	NASDAQ	ATRO	Thu, Apr 4, 2002	4.38	4.42	4.34	4.34
2467	NASDAQ	ATRO	Wed, Apr 3, 2002	4.38	4.42	4.36	4.37
2466	NASDAQ	ATRO	Tue, Apr 2, 2002	4.33	4.38	4.30	4.34
2465	NASDAQ	ATRO	Mon, Apr 1, 2002	4.14	4.33	4.14	4.33
2464	NASDAQ	ATRO	Thu, Mar 28, 2002	4.16	4.24	4.13	4.23
2463	NASDAQ	ATRO	Wed, Mar 27, 2002	4.11	4.20	4.10	4.13
2462	NASDAQ	ATRO	Tue, Mar 26, 2002	4.20	4.20	4.12	4.12
2461	NASDAQ	ATRO	Mon, Mar 25, 2002	4.22	4.25	4.11	4.12
2460	NASDAQ	ATRO	Fri, Mar 22, 2002	4.26	4.26	4.22	4.23
2459	NASDAQ	ATRO	Thu, Mar 21, 2002	4.42	4.42	4.24	4.26
2458	NASDAQ	ATRO	Wed, Mar 20, 2002	4.42	4.48	4.38	4.38
2457	NASDAQ	ATRO	Tue, Mar 19, 2002	4.49	4.49	4.34	4.43
2456	NASDAQ	ATRO	Mon, Mar 18, 2002	4.50	4.50	4.45	4.50
2455	NASDAQ	ATRO	Fri, Mar 15, 2002	4.49	4.57	4.49	4.50
2454	NASDAQ	ATRO	Thu, Mar 14, 2002	4.50	4.50	4.47	4.47
2453	NASDAQ	ATRO	Wed, Mar 13, 2002	4.57	4.66	4.50	4.50
2452	NASDAQ	ATRO	Tue, Mar 12, 2002	4.41	4.57	4.41	4.57
2451	NASDAQ	ATRO	Mon, Mar 11, 2002	4.39	4.39	4.35	4.39
2450	NASDAQ	ATRO	Fri, Mar 8, 2002	4.36	4.45	4.35	4.35
2449	NASDAQ	ATRO	Thu, Mar 7, 2002	4.29	4.45	4.20	4.36
2448	NASDAQ	ATRO	Wed, Mar 6, 2002	4.29	4.38	4.29	4.33
2447	NASDAQ	ATRO	Tue, Mar 5, 2002	4.21	4.27	4.16	4.27
2446	NASDAQ	ATRO	Mon, Mar 4, 2002	4.34	4.34	4.21	4.21
2445	NASDAQ	ATRO	Fri, Mar 1, 2002	4.19	4.41	4.19	4.23
2444	NASDAQ	ATRO	Thu, Feb 28, 2002	4.11	4.31	4.11	4.29
2443	NASDAQ	ATRO	Wed, Feb 27, 2002	4.27	4.27	4.11	4.11
2442	NASDAQ	ATRO	Tue, Feb 26, 2002	4.27	4.33	4.17	4.25
2441	NASDAQ	ATRO	Mon, Feb 25, 2002	4.22	4.31	4.07	4.17
2440	NASDAQ	ATRO	Fri, Feb 22, 2002	4.26	4.27	4.16	4.16
2439	NASDAQ	ATRO	Thu, Feb 21, 2002	4.29	4.29	4.23	4.23
2438	NASDAQ	ATRO	Wed, Feb 20, 2002	4.18	4.34	4.09	4.23
2437	NASDAQ	ATRO	Tue, Feb 19, 2002	4.09	4.16	4.00	4.12
2436	NASDAQ	ATRO	Fri, Feb 15, 2002	4.13	4.22	4.10	4.10
2435	NASDAQ	ATRO	Thu, Feb 14, 2002	4.22	4.30	4.09	4.11
2434	NASDAQ	ATRO	Wed, Feb 13, 2002	4.25	4.31	4.18	4.23
2433	NASDAQ	ATRO	Tue, Feb 12, 2002	4.45	4.54	4.09	4.29
2432	NASDAQ	ATRO	Mon, Feb 11, 2002	4.75	4.75	4.02	4.43
2431	NASDAQ	ATRO	Fri, Feb 8, 2002	4.79	4.91	4.68	4.84
2430	NASDAQ	ATRO	Thu, Feb 7, 2002	5.02	5.12	4.89	4.89
2429	NASDAQ	ATRO	Wed, Feb 6, 2002	5.11	5.11	4.82	5.02
2428	NASDAQ	ATRO	Tue, Feb 5, 2002	4.98	5.27	4.98	5.05
2427	NASDAQ	ATRO	Mon, Feb 4, 2002	5.05	5.14	5.00	5.00
2426	NASDAQ	ATRO	Fri, Feb 1, 2002	5.19	5.27	5.05	5.06
2425	NASDAQ	ATRO	Thu, Jan 31, 2002	5.70	5.70	4.68	5.26
2424	NASDAQ	ATRO	Wed, Jan 30, 2002	5.80	5.80	5.76	5.80
2423	NASDAQ	ATRO	Tue, Jan 29, 2002	5.84	5.84	5.78	5.78
2422	NASDAQ	ATRO	Mon, Jan 28, 2002	5.78	5.93	5.75	5.84
2421	NASDAQ	ATRO	Fri, Jan 25, 2002	5.83	5.89	5.78	5.79
2420	NASDAQ	ATRO	Thu, Jan 24, 2002	5.87	5.87	5.79	5.80
2419	NASDAQ	ATRO	Wed, Jan 23, 2002	5.57	5.84	5.52	5.84
2418	NASDAQ	ATRO	Tue, Jan 22, 2002	5.59	5.61	5.47	5.47
2417	NASDAQ	ATRO	Fri, Jan 18, 2002	5.51	5.55	5.39	5.47
2416	NASDAQ	ATRO	Thu, Jan 17, 2002	5.35	5.66	5.34	5.52
2415	NASDAQ	ATRO	Wed, Jan 16, 2002	5.50	5.50	5.25	5.37
2414	NASDAQ	ATRO	Tue, Jan 15, 2002	5.52	5.68	5.48	5.57
2413	NASDAQ	ATRO	Mon, Jan 14, 2002	5.66	5.71	5.57	5.57
2412	NASDAQ	ATRO	Fri, Jan 11, 2002	5.78	5.84	5.46	5.59
2411	NASDAQ	ATRO	Thu, Jan 10, 2002	5.82	5.89	5.82	5.82
2410	NASDAQ	ATRO	Wed, Jan 9, 2002	5.60	5.98	5.59	5.78
2409	NASDAQ	ATRO	Tue, Jan 8, 2002	5.72	5.96	5.62	5.66
2408	NASDAQ	ATRO	Mon, Jan 7, 2002	5.89	6.00	5.62	5.91
2407	NASDAQ	ATRO	Fri, Jan 4, 2002	5.71	6.05	5.71	5.85
2406	NASDAQ	ATRO	Thu, Jan 3, 2002	5.27	5.78	5.27	5.78
2405	NASDAQ	ATRO	Wed, Jan 2, 2002	5.17	5.46	5.17	5.46
2404	NASDAQ	ATRO	Mon, Dec 31, 2001	5.14	5.30	5.14	5.17
2403	NASDAQ	ATRO	Fri, Dec 28, 2001	5.21	5.34	5.09	5.09
2402	NASDAQ	ATRO	Thu, Dec 27, 2001	5.25	5.25	5.14	5.21
2401	NASDAQ	ATRO	Wed, Dec 26, 2001	5.23	5.28	5.09	5.10
2400	NASDAQ	ATRO	Mon, Dec 24, 2001	5.52	5.57	5.48	5.48
2399	NASDAQ	ATRO	Fri, Dec 21, 2001	5.50	5.55	5.37	5.55
2398	NASDAQ	ATRO	Thu, Dec 20, 2001	5.30	5.50	5.12	5.48
2397	NASDAQ	ATRO	Wed, Dec 19, 2001	5.39	5.39	5.30	5.32
2396	NASDAQ	ATRO	Tue, Dec 18, 2001	5.27	5.73	5.15	5.41
2395	NASDAQ	ATRO	Mon, Dec 17, 2001	5.37	5.59	4.61	5.30
2394	NASDAQ	ATRO	Fri, Dec 14, 2001	6.16	6.26	5.25	5.37
2393	NASDAQ	ATRO	Thu, Dec 13, 2001	6.49	6.49	6.03	6.19
2392	NASDAQ	ATRO	Wed, Dec 12, 2001	6.39	6.58	6.37	6.42
2391	NASDAQ	ATRO	Tue, Dec 11, 2001	6.35	6.44	6.30	6.37
2390	NASDAQ	ATRO	Mon, Dec 10, 2001	6.28	6.35	6.21	6.35
2389	NASDAQ	ATRO	Fri, Dec 7, 2001	6.43	6.80	6.19	6.24
2388	NASDAQ	ATRO	Thu, Dec 6, 2001	6.18	6.46	6.12	6.42
2387	NASDAQ	ATRO	Wed, Dec 5, 2001	6.12	6.28	6.00	6.12
2386	NASDAQ	ATRO	Tue, Dec 4, 2001	6.33	6.33	5.94	6.05
2385	NASDAQ	ATRO	Mon, Dec 3, 2001	6.06	6.28	6.05	6.20
2384	NASDAQ	ATRO	Fri, Nov 30, 2001	6.31	6.31	6.05	6.14
2383	NASDAQ	ATRO	Thu, Nov 29, 2001	6.30	6.39	5.98	6.39
2382	NASDAQ	ATRO	Wed, Nov 28, 2001	6.07	6.28	6.07	6.16
2381	NASDAQ	ATRO	Tue, Nov 27, 2001	6.19	6.21	6.00	6.07
2380	NASDAQ	ATRO	Mon, Nov 26, 2001	6.16	6.23	6.07	6.23
2379	NASDAQ	ATRO	Fri, Nov 23, 2001	6.23	6.23	6.10	6.10
2378	NASDAQ	ATRO	Wed, Nov 21, 2001	6.23	6.23	6.07	6.19
2377	NASDAQ	ATRO	Tue, Nov 20, 2001	6.21	6.23	6.03	6.23
2376	NASDAQ	ATRO	Mon, Nov 19, 2001	6.05	6.07	6.03	6.04
2375	NASDAQ	ATRO	Fri, Nov 16, 2001	6.36	6.36	6.01	6.05
2374	NASDAQ	ATRO	Thu, Nov 15, 2001	6.46	6.52	6.36	6.36
2373	NASDAQ	ATRO	Wed, Nov 14, 2001	7.08	7.10	6.37	6.48
2372	NASDAQ	ATRO	Tue, Nov 13, 2001	7.06	7.31	6.88	7.21
2371	NASDAQ	ATRO	Mon, Nov 12, 2001	6.84	7.07	6.83	7.07
2370	NASDAQ	ATRO	Fri, Nov 9, 2001	6.68	6.85	6.64	6.85
2369	NASDAQ	ATRO	Thu, Nov 8, 2001	6.59	6.68	6.56	6.68
2368	NASDAQ	ATRO	Wed, Nov 7, 2001	6.51	6.65	6.50	6.58
2367	NASDAQ	ATRO	Tue, Nov 6, 2001	6.40	6.51	6.39	6.51
2366	NASDAQ	ATRO	Mon, Nov 5, 2001	6.62	6.62	6.40	6.44
2365	NASDAQ	ATRO	Fri, Nov 2, 2001	6.58	6.66	6.51	6.51
2364	NASDAQ	ATRO	Thu, Nov 1, 2001	6.30	6.62	6.30	6.51
2363	NASDAQ	ATRO	Wed, Oct 31, 2001	6.14	6.26	6.10	6.16
2362	NASDAQ	ATRO	Tue, Oct 30, 2001	6.17	6.22	6.07	6.07
2361	NASDAQ	ATRO	Mon, Oct 29, 2001	6.26	6.38	6.18	6.18
2360	NASDAQ	ATRO	Fri, Oct 26, 2001	5.79	6.30	5.79	6.18
2359	NASDAQ	ATRO	Thu, Oct 25, 2001	5.75	5.96	5.68	5.94
2358	NASDAQ	ATRO	Wed, Oct 24, 2001	5.57	5.57	5.34	5.34
2357	NASDAQ	ATRO	Tue, Oct 23, 2001	5.71	5.71	5.59	5.59
2356	NASDAQ	ATRO	Mon, Oct 22, 2001	5.71	5.71	5.71	5.71
2355	NASDAQ	ATRO	Fri, Oct 19, 2001	5.67	5.79	5.66	5.79
2354	NASDAQ	ATRO	Thu, Oct 18, 2001	5.66	5.79	5.66	5.78
2353	NASDAQ	ATRO	Wed, Oct 17, 2001	5.60	5.61	5.60	5.60
2352	NASDAQ	ATRO	Tue, Oct 16, 2001	5.60	5.60	5.59	5.59
2351	NASDAQ	ATRO	Mon, Oct 15, 2001	5.35	5.62	5.34	5.49
2350	NASDAQ	ATRO	Fri, Oct 12, 2001	5.39	5.48	5.34	5.42
2349	NASDAQ	ATRO	Thu, Oct 11, 2001	5.27	5.41	5.16	5.41
2348	NASDAQ	ATRO	Wed, Oct 10, 2001	5.03	5.27	5.03	5.26
2347	NASDAQ	ATRO	Tue, Oct 9, 2001	5.20	5.25	4.79	5.21
2346	NASDAQ	ATRO	Mon, Oct 8, 2001	5.22	5.22	5.14	5.20
2345	NASDAQ	ATRO	Fri, Oct 5, 2001	5.04	5.04	5.02	5.03
2344	NASDAQ	ATRO	Thu, Oct 4, 2001	5.05	5.20	4.95	5.04
2343	NASDAQ	ATRO	Wed, Oct 3, 2001	5.00	5.21	4.89	5.02
2342	NASDAQ	ATRO	Tue, Oct 2, 2001	4.93	5.02	4.93	5.00
2341	NASDAQ	ATRO	Mon, Oct 1, 2001	5.48	5.48	4.78	4.84
2340	NASDAQ	ATRO	Fri, Sep 28, 2001	5.02	5.78	5.02	5.48
2339	NASDAQ	ATRO	Thu, Sep 27, 2001	4.96	5.09	4.95	5.09
2338	NASDAQ	ATRO	Wed, Sep 26, 2001	4.61	5.02	4.54	4.90
2337	NASDAQ	ATRO	Tue, Sep 25, 2001	4.61	4.86	4.61	4.61
2336	NASDAQ	ATRO	Mon, Sep 24, 2001	4.57	4.74	4.56	4.68
2335	NASDAQ	ATRO	Fri, Sep 21, 2001	4.89	4.91	4.29	4.41
2334	NASDAQ	ATRO	Thu, Sep 20, 2001	4.89	5.00	4.87	4.95
2333	NASDAQ	ATRO	Wed, Sep 19, 2001	5.29	5.43	4.84	5.00
2332	NASDAQ	ATRO	Tue, Sep 18, 2001	5.25	5.48	4.97	5.05
2331	NASDAQ	ATRO	Mon, Sep 17, 2001	5.71	6.35	5.24	5.24
2330	NASDAQ	ATRO	Mon, Sep 10, 2001	6.28	6.39	6.16	6.16
2329	NASDAQ	ATRO	Fri, Sep 7, 2001	6.28	6.28	6.12	6.15
2328	NASDAQ	ATRO	Thu, Sep 6, 2001	6.26	6.44	6.16	6.44
2327	NASDAQ	ATRO	Wed, Sep 5, 2001	6.19	6.26	6.16	6.26
2326	NASDAQ	ATRO	Tue, Sep 4, 2001	6.26	6.28	6.19	6.26
2325	NASDAQ	ATRO	Fri, Aug 31, 2001	6.19	6.39	6.17	6.39
2324	NASDAQ	ATRO	Thu, Aug 30, 2001	6.32	6.37	6.21	6.37
2323	NASDAQ	ATRO	Wed, Aug 29, 2001	6.26	6.32	6.21	6.32
2322	NASDAQ	ATRO	Tue, Aug 28, 2001	6.36	6.39	6.17	6.18
2321	NASDAQ	ATRO	Mon, Aug 27, 2001	6.37	6.37	6.17	6.27
2320	NASDAQ	ATRO	Fri, Aug 24, 2001	6.46	6.54	6.13	6.36
2319	NASDAQ	ATRO	Thu, Aug 23, 2001	6.26	6.39	6.16	6.16
2318	NASDAQ	ATRO	Wed, Aug 22, 2001	6.45	6.51	6.24	6.26
2317	NASDAQ	ATRO	Tue, Aug 21, 2001	6.51	6.73	6.46	6.51
2316	NASDAQ	ATRO	Mon, Aug 20, 2001	6.84	6.84	6.51	6.53
2315	NASDAQ	ATRO	Fri, Aug 17, 2001	6.78	6.78	6.76	6.78
2314	NASDAQ	ATRO	Thu, Aug 16, 2001	6.73	6.85	6.73	6.78
2313	NASDAQ	ATRO	Wed, Aug 15, 2001	6.80	6.80	6.71	6.73
2312	NASDAQ	ATRO	Tue, Aug 14, 2001	6.71	6.85	6.71	6.83
2311	NASDAQ	ATRO	Mon, Aug 13, 2001	6.73	6.85	6.73	6.74
2310	NASDAQ	ATRO	Fri, Aug 10, 2001	6.79	6.80	6.69	6.80
2309	NASDAQ	ATRO	Thu, Aug 9, 2001	6.96	6.96	6.85	6.85
2308	NASDAQ	ATRO	Wed, Aug 8, 2001	6.81	6.99	6.77	6.78
2307	NASDAQ	ATRO	Tue, Aug 7, 2001	6.85	6.98	6.77	6.80
2306	NASDAQ	ATRO	Mon, Aug 6, 2001	6.72	6.94	6.70	6.89
2305	NASDAQ	ATRO	Fri, Aug 3, 2001	6.79	6.91	6.70	6.91
2304	NASDAQ	ATRO	Thu, Aug 2, 2001	6.83	6.89	6.76	6.76
2303	NASDAQ	ATRO	Wed, Aug 1, 2001	6.82	6.94	6.62	6.94
2302	NASDAQ	ATRO	Tue, Jul 31, 2001	6.83	6.87	6.44	6.82
2301	NASDAQ	ATRO	Mon, Jul 30, 2001	6.94	6.94	6.44	6.60
2300	NASDAQ	ATRO	Fri, Jul 27, 2001	7.10	7.10	6.28	6.76
2299	NASDAQ	ATRO	Thu, Jul 26, 2001	6.69	7.07	6.63	7.05
2298	NASDAQ	ATRO	Wed, Jul 25, 2001	6.38	6.62	6.08	6.37
2297	NASDAQ	ATRO	Tue, Jul 24, 2001	6.26	6.73	5.98	6.23
2296	NASDAQ	ATRO	Mon, Jul 23, 2001	6.26	6.39	5.94	6.16
2295	NASDAQ	ATRO	Fri, Jul 20, 2001	6.05	6.39	5.84	6.39
2294	NASDAQ	ATRO	Thu, Jul 19, 2001	5.95	6.16	5.95	6.04
2293	NASDAQ	ATRO	Wed, Jul 18, 2001	6.19	6.42	5.86	5.87
2292	NASDAQ	ATRO	Tue, Jul 17, 2001	5.99	6.39	5.99	6.37
2291	NASDAQ	ATRO	Mon, Jul 16, 2001	6.39	6.39	5.84	6.39
2290	NASDAQ	ATRO	Fri, Jul 13, 2001	6.18	6.78	6.18	6.39
2289	NASDAQ	ATRO	Thu, Jul 12, 2001	5.87	6.44	5.87	6.18
2288	NASDAQ	ATRO	Wed, Jul 11, 2001	6.14	6.14	5.50	5.87
2287	NASDAQ	ATRO	Tue, Jul 10, 2001	6.28	6.28	6.12	6.12
2286	NASDAQ	ATRO	Mon, Jul 9, 2001	6.16	6.32	6.11	6.21
2285	NASDAQ	ATRO	Fri, Jul 6, 2001	6.40	6.40	6.05	6.34
2284	NASDAQ	ATRO	Thu, Jul 5, 2001	6.30	6.57	6.30	6.40
2283	NASDAQ	ATRO	Tue, Jul 3, 2001	6.30	6.48	6.19	6.48
2282	NASDAQ	ATRO	Mon, Jul 2, 2001	6.42	6.95	6.27	6.31
2281	NASDAQ	ATRO	Fri, Jun 29, 2001	6.39	6.95	6.39	6.95
2280	NASDAQ	ATRO	Thu, Jun 28, 2001	6.12	6.95	5.86	6.42
2279	NASDAQ	ATRO	Wed, Jun 27, 2001	5.92	6.35	5.92	6.07
2278	NASDAQ	ATRO	Tue, Jun 26, 2001	5.71	5.93	5.71	5.85
2277	NASDAQ	ATRO	Mon, Jun 25, 2001	6.03	6.04	5.59	5.78
2276	NASDAQ	ATRO	Fri, Jun 22, 2001	5.66	6.16	5.41	6.05
2275	NASDAQ	ATRO	Thu, Jun 21, 2001	5.37	5.59	5.26	5.43
2274	NASDAQ	ATRO	Wed, Jun 20, 2001	4.93	5.34	4.93	5.23
2273	NASDAQ	ATRO	Tue, Jun 19, 2001	5.30	5.63	5.02	5.23
2272	NASDAQ	ATRO	Mon, Jun 18, 2001	5.94	5.98	5.09	5.43
2271	NASDAQ	ATRO	Fri, Jun 15, 2001	5.92	6.07	5.82	5.89
2270	NASDAQ	ATRO	Thu, Jun 14, 2001	6.21	6.40	5.73	6.13
2269	NASDAQ	ATRO	Wed, Jun 13, 2001	5.87	6.59	5.87	6.19
2268	NASDAQ	ATRO	Tue, Jun 12, 2001	5.94	6.16	5.60	5.95
2267	NASDAQ	ATRO	Mon, Jun 11, 2001	6.30	6.51	6.07	6.16
2266	NASDAQ	ATRO	Fri, Jun 8, 2001	7.03	7.03	6.10	6.30
2265	NASDAQ	ATRO	Thu, Jun 7, 2001	7.31	7.33	7.01	7.15
2264	NASDAQ	ATRO	Wed, Jun 6, 2001	6.99	7.43	6.99	7.30
2263	NASDAQ	ATRO	Tue, Jun 5, 2001	7.58	7.74	6.89	7.30
2262	NASDAQ	ATRO	Mon, Jun 4, 2001	6.71	7.57	6.71	7.56
2261	NASDAQ	ATRO	Fri, Jun 1, 2001	7.22	7.35	6.92	7.23
2260	NASDAQ	ATRO	Thu, May 31, 2001	7.26	7.47	6.93	7.40
2259	NASDAQ	ATRO	Wed, May 30, 2001	7.67	8.22	6.85	7.19
2258	NASDAQ	ATRO	Tue, May 29, 2001	9.42	9.42	8.45	8.45
2257	NASDAQ	ATRO	Fri, May 25, 2001	9.28	9.35	9.02	9.18
2256	NASDAQ	ATRO	Thu, May 24, 2001	9.56	9.57	8.49	9.13
2255	NASDAQ	ATRO	Wed, May 23, 2001	9.77	9.81	8.90	9.36
2254	NASDAQ	ATRO	Tue, May 22, 2001	9.50	9.81	9.18	9.66
2253	NASDAQ	ATRO	Mon, May 21, 2001	8.67	9.22	8.22	9.11
2252	NASDAQ	ATRO	Fri, May 18, 2001	7.79	8.22	7.79	8.22
2251	NASDAQ	ATRO	Thu, May 17, 2001	8.22	8.22	7.79	7.79
2250	NASDAQ	ATRO	Wed, May 16, 2001	8.22	8.38	8.10	8.22
2249	NASDAQ	ATRO	Tue, May 15, 2001	8.33	8.33	8.10	8.26
2248	NASDAQ	ATRO	Mon, May 14, 2001	8.22	8.55	8.16	8.45
2247	NASDAQ	ATRO	Fri, May 11, 2001	8.44	8.44	7.88	8.22
2246	NASDAQ	ATRO	Thu, May 10, 2001	8.34	8.45	8.13	8.37
2245	NASDAQ	ATRO	Wed, May 9, 2001	8.13	8.68	8.13	8.36
2244	NASDAQ	ATRO	Tue, May 8, 2001	8.17	8.20	8.04	8.13
2243	NASDAQ	ATRO	Mon, May 7, 2001	7.76	8.20	7.76	8.20
2242	NASDAQ	ATRO	Fri, May 4, 2001	8.22	8.22	7.54	7.83
2241	NASDAQ	ATRO	Thu, May 3, 2001	8.74	8.74	8.22	8.22
2240	NASDAQ	ATRO	Wed, May 2, 2001	8.52	8.76	8.45	8.69
2239	NASDAQ	ATRO	Tue, May 1, 2001	8.61	8.79	8.26	8.45
2238	NASDAQ	ATRO	Mon, Apr 30, 2001	8.90	8.90	8.61	8.63
2237	NASDAQ	ATRO	Fri, Apr 27, 2001	8.86	8.88	8.56	8.79
2236	NASDAQ	ATRO	Thu, Apr 26, 2001	8.45	8.79	8.45	8.70
2235	NASDAQ	ATRO	Wed, Apr 25, 2001	8.92	8.93	8.38	8.61
2234	NASDAQ	ATRO	Tue, Apr 24, 2001	8.74	8.93	8.68	8.93
2233	NASDAQ	ATRO	Mon, Apr 23, 2001	8.23	8.79	8.22	8.72
2232	NASDAQ	ATRO	Fri, Apr 20, 2001	8.47	8.66	7.63	8.33
2231	NASDAQ	ATRO	Thu, Apr 19, 2001	8.54	8.68	8.36	8.65
2230	NASDAQ	ATRO	Wed, Apr 18, 2001	8.43	8.55	8.22	8.49
2229	NASDAQ	ATRO	Tue, Apr 17, 2001	7.53	8.26	7.37	8.22
2228	NASDAQ	ATRO	Mon, Apr 16, 2001	7.62	7.62	7.35	7.42
2227	NASDAQ	ATRO	Thu, Apr 12, 2001	7.65	7.65	7.33	7.54
2226	NASDAQ	ATRO	Wed, Apr 11, 2001	7.67	7.75	7.31	7.65
2225	NASDAQ	ATRO	Tue, Apr 10, 2001	7.33	7.75	7.19	7.67
2224	NASDAQ	ATRO	Mon, Apr 9, 2001	7.67	7.69	7.08	7.19
2223	NASDAQ	ATRO	Fri, Apr 6, 2001	7.88	7.88	7.31	7.48
2222	NASDAQ	ATRO	Thu, Apr 5, 2001	7.95	8.10	7.88	7.88
2221	NASDAQ	ATRO	Wed, Apr 4, 2001	7.33	7.82	7.33	7.73
2220	NASDAQ	ATRO	Tue, Apr 3, 2001	7.88	8.05	6.79	7.31
2219	NASDAQ	ATRO	Mon, Apr 2, 2001	8.09	8.16	7.85	8.02
2218	NASDAQ	ATRO	Fri, Mar 30, 2001	7.38	7.85	7.36	7.82
2217	NASDAQ	ATRO	Thu, Mar 29, 2001	7.13	7.33	7.08	7.33
2216	NASDAQ	ATRO	Wed, Mar 28, 2001	6.99	7.16	6.82	7.04
2215	NASDAQ	ATRO	Tue, Mar 27, 2001	6.78	6.99	6.62	6.93
2214	NASDAQ	ATRO	Mon, Mar 26, 2001	6.70	6.79	6.56	6.79
2213	NASDAQ	ATRO	Fri, Mar 23, 2001	6.59	6.71	6.56	6.56
2212	NASDAQ	ATRO	Thu, Mar 22, 2001	6.47	6.54	6.31	6.51
2211	NASDAQ	ATRO	Wed, Mar 21, 2001	6.56	6.71	6.45	6.56
2210	NASDAQ	ATRO	Tue, Mar 20, 2001	6.29	6.59	6.28	6.59
2209	NASDAQ	ATRO	Mon, Mar 19, 2001	6.42	6.48	6.28	6.39
2208	NASDAQ	ATRO	Fri, Mar 16, 2001	6.16	6.45	6.16	6.39
2207	NASDAQ	ATRO	Thu, Mar 15, 2001	6.25	6.51	6.25	6.51
2206	NASDAQ	ATRO	Wed, Mar 14, 2001	6.16	6.22	6.05	6.22
2205	NASDAQ	ATRO	Tue, Mar 13, 2001	6.34	6.39	6.19	6.39
2204	NASDAQ	ATRO	Mon, Mar 12, 2001	6.34	6.39	6.16	6.39
2203	NASDAQ	ATRO	Fri, Mar 9, 2001	5.83	6.34	5.82	6.34
2202	NASDAQ	ATRO	Thu, Mar 8, 2001	6.11	6.16	5.85	5.99
2201	NASDAQ	ATRO	Wed, Mar 7, 2001	6.39	6.39	6.05	6.11
2200	NASDAQ	ATRO	Tue, Mar 6, 2001	6.34	6.39	6.28	6.39
2199	NASDAQ	ATRO	Mon, Mar 5, 2001	6.39	6.56	6.34	6.34
2198	NASDAQ	ATRO	Fri, Mar 2, 2001	6.48	6.56	6.28	6.39
2197	NASDAQ	ATRO	Thu, Mar 1, 2001	6.56	6.56	6.34	6.56
2196	NASDAQ	ATRO	Wed, Feb 28, 2001	6.51	6.85	6.34	6.56
2195	NASDAQ	ATRO	Tue, Feb 27, 2001	6.31	6.85	6.31	6.85
2194	NASDAQ	ATRO	Mon, Feb 26, 2001	5.99	6.34	5.99	6.28
2193	NASDAQ	ATRO	Fri, Feb 23, 2001	6.16	6.16	5.74	6.16
2192	NASDAQ	ATRO	Thu, Feb 22, 2001	5.82	6.34	5.82	6.22
2191	NASDAQ	ATRO	Wed, Feb 21, 2001	6.54	6.54	5.65	5.99
2190	NASDAQ	ATRO	Tue, Feb 20, 2001	7.19	7.19	6.34	6.56
2189	NASDAQ	ATRO	Fri, Feb 16, 2001	7.25	7.31	7.08	7.08
2188	NASDAQ	ATRO	Thu, Feb 15, 2001	6.85	7.19	6.79	7.16
2187	NASDAQ	ATRO	Wed, Feb 14, 2001	6.77	6.91	6.76	6.88
2186	NASDAQ	ATRO	Tue, Feb 13, 2001	6.73	6.85	6.73	6.73
2185	NASDAQ	ATRO	Mon, Feb 12, 2001	6.88	6.88	6.85	6.85
2184	NASDAQ	ATRO	Fri, Feb 9, 2001	6.88	6.93	6.73	6.88
2183	NASDAQ	ATRO	Thu, Feb 8, 2001	6.74	6.91	6.71	6.88
2182	NASDAQ	ATRO	Wed, Feb 7, 2001	6.69	6.73	6.62	6.73
2181	NASDAQ	ATRO	Tue, Feb 6, 2001	6.65	6.73	6.65	6.68
2180	NASDAQ	ATRO	Mon, Feb 5, 2001	6.88	6.91	6.62	6.65
2179	NASDAQ	ATRO	Fri, Feb 2, 2001	6.74	6.91	6.74	6.88
2178	NASDAQ	ATRO	Thu, Feb 1, 2001	6.81	6.96	6.73	6.73
2177	NASDAQ	ATRO	Wed, Jan 31, 2001	6.44	6.85	6.44	6.79
2176	NASDAQ	ATRO	Tue, Jan 30, 2001	6.44	6.45	6.28	6.42
2175	NASDAQ	ATRO	Mon, Jan 29, 2001	6.22	6.45	6.16	6.25
2174	NASDAQ	ATRO	Fri, Jan 26, 2001	6.22	6.51	6.16	6.39
2173	NASDAQ	ATRO	Thu, Jan 25, 2001	5.71	6.45	5.71	6.22
2172	NASDAQ	ATRO	Wed, Jan 24, 2001	5.69	5.71	5.65	5.71
2171	NASDAQ	ATRO	Tue, Jan 23, 2001	5.67	5.71	5.59	5.71
2170	NASDAQ	ATRO	Mon, Jan 22, 2001	5.08	5.62	5.08	5.56
2169	NASDAQ	ATRO	Fri, Jan 19, 2001	5.02	5.56	5.02	5.42
2168	NASDAQ	ATRO	Thu, Jan 18, 2001	5.25	5.34	4.91	5.14
2167	NASDAQ	ATRO	Wed, Jan 17, 2001	5.14	5.28	5.05	5.28
2166	NASDAQ	ATRO	Tue, Jan 16, 2001	5.19	5.19	4.91	5.19
2165	NASDAQ	ATRO	Fri, Jan 12, 2001	5.19	5.25	4.91	5.25
2164	NASDAQ	ATRO	Thu, Jan 11, 2001	5.19	5.25	5.19	5.25
2163	NASDAQ	ATRO	Wed, Jan 10, 2001	5.20	5.34	5.19	5.19
2162	NASDAQ	ATRO	Tue, Jan 9, 2001	5.19	5.19	5.19	5.19
2161	NASDAQ	ATRO	Mon, Jan 8, 2001	5.14	5.19	5.14	5.19
2160	NASDAQ	ATRO	Fri, Jan 5, 2001	5.14	5.14	5.14	5.14
2159	NASDAQ	ATRO	Thu, Jan 4, 2001	5.37	5.37	5.37	5.37
2158	NASDAQ	ATRO	Wed, Jan 3, 2001	5.31	5.37	5.19	5.37
2157	NASDAQ	ATRO	Tue, Jan 2, 2001	5.48	5.48	5.19	5.37
2156	NASDAQ	ATRO	Fri, Dec 29, 2000	5.37	5.48	5.37	5.48
2155	NASDAQ	ATRO	Thu, Dec 28, 2000	5.48	5.56	5.42	5.48
2154	NASDAQ	ATRO	Wed, Dec 27, 2000	5.48	5.48	5.48	5.48
2153	NASDAQ	ATRO	Tue, Dec 26, 2000	5.37	5.48	5.37	5.48
2152	NASDAQ	ATRO	Fri, Dec 22, 2000	5.48	5.54	5.28	5.48
2151	NASDAQ	ATRO	Thu, Dec 21, 2000	5.37	5.48	5.19	5.48
2150	NASDAQ	ATRO	Wed, Dec 20, 2000	5.19	5.42	5.08	5.37
2149	NASDAQ	ATRO	Tue, Dec 19, 2000	5.08	5.25	5.02	5.14
2148	NASDAQ	ATRO	Mon, Dec 18, 2000	5.14	5.14	4.99	5.02
2147	NASDAQ	ATRO	Fri, Dec 15, 2000	4.79	5.37	4.79	4.97
2146	NASDAQ	ATRO	Thu, Dec 14, 2000	4.91	5.08	4.91	4.94
2145	NASDAQ	ATRO	Tue, Dec 12, 2000	4.99	5.19	4.82	5.19
2144	NASDAQ	ATRO	Mon, Dec 11, 2000	5.08	5.08	4.79	4.82
2143	NASDAQ	ATRO	Thu, Dec 7, 2000	5.11	5.19	4.97	5.19
2142	NASDAQ	ATRO	Wed, Dec 6, 2000	5.22	5.22	5.11	5.11
2141	NASDAQ	ATRO	Tue, Dec 5, 2000	5.11	5.25	5.11	5.14
2140	NASDAQ	ATRO	Mon, Dec 4, 2000	5.02	5.02	5.02	5.02
2139	NASDAQ	ATRO	Fri, Dec 1, 2000	5.19	5.19	5.19	5.19
2138	NASDAQ	ATRO	Thu, Nov 30, 2000	5.02	5.19	5.02	5.19
2137	NASDAQ	ATRO	Wed, Nov 29, 2000	5.08	5.14	5.08	5.14
2136	NASDAQ	ATRO	Tue, Nov 28, 2000	5.31	5.31	5.31	5.31
2135	NASDAQ	ATRO	Mon, Nov 27, 2000	5.08	5.08	5.08	5.08
2134	NASDAQ	ATRO	Wed, Nov 22, 2000	5.08	5.31	5.08	5.31
2133	NASDAQ	ATRO	Tue, Nov 21, 2000	5.05	5.05	5.05	5.05
2132	NASDAQ	ATRO	Mon, Nov 20, 2000	5.06	5.37	5.05	5.37
2131	NASDAQ	ATRO	Fri, Nov 17, 2000	5.14	5.14	5.05	5.05
2130	NASDAQ	ATRO	Thu, Nov 16, 2000	5.11	5.11	5.05	5.05
2129	NASDAQ	ATRO	Wed, Nov 15, 2000	5.28	5.28	5.11	5.28
2128	NASDAQ	ATRO	Tue, Nov 14, 2000	5.27	5.45	5.27	5.31
2127	NASDAQ	ATRO	Mon, Nov 13, 2000	5.03	5.48	5.03	5.45
2126	NASDAQ	ATRO	Fri, Nov 10, 2000	5.11	5.28	5.08	5.28
2125	NASDAQ	ATRO	Thu, Nov 9, 2000	5.05	5.22	5.02	5.22
2124	NASDAQ	ATRO	Wed, Nov 8, 2000	4.82	5.08	4.82	5.08
2123	NASDAQ	ATRO	Tue, Nov 7, 2000	5.11	5.11	5.05	5.05
2122	NASDAQ	ATRO	Mon, Nov 6, 2000	5.22	5.22	5.08	5.11
2121	NASDAQ	ATRO	Fri, Nov 3, 2000	4.79	5.14	4.79	4.97
2120	NASDAQ	ATRO	Thu, Nov 2, 2000	4.97	4.97	4.79	4.94
2119	NASDAQ	ATRO	Wed, Nov 1, 2000	4.97	4.97	4.79	4.79
2118	NASDAQ	ATRO	Tue, Oct 31, 2000	4.97	4.97	4.79	4.79
2117	NASDAQ	ATRO	Mon, Oct 30, 2000	4.82	4.82	4.68	4.68
2116	NASDAQ	ATRO	Thu, Oct 26, 2000	5.17	5.17	4.85	4.99
2115	NASDAQ	ATRO	Wed, Oct 25, 2000	5.07	5.17	4.74	5.14
2114	NASDAQ	ATRO	Tue, Oct 24, 2000	4.80	5.08	4.59	4.99
2113	NASDAQ	ATRO	Mon, Oct 23, 2000	5.02	5.02	4.79	4.79
2112	NASDAQ	ATRO	Fri, Oct 20, 2000	4.79	4.79	4.79	4.79
2111	NASDAQ	ATRO	Thu, Oct 19, 2000	5.02	5.02	4.79	4.79
2110	NASDAQ	ATRO	Wed, Oct 18, 2000	4.79	5.02	4.79	5.02
2109	NASDAQ	ATRO	Tue, Oct 17, 2000	5.02	5.02	5.02	5.02
2108	NASDAQ	ATRO	Mon, Oct 16, 2000	4.68	4.91	4.57	4.91
2107	NASDAQ	ATRO	Fri, Oct 13, 2000	5.02	5.02	4.51	4.91
2106	NASDAQ	ATRO	Thu, Oct 12, 2000	4.86	5.34	4.86	5.34
2105	NASDAQ	ATRO	Wed, Oct 11, 2000	5.02	5.02	5.02	5.02
2104	NASDAQ	ATRO	Tue, Oct 10, 2000	5.37	5.45	5.25	5.25
2103	NASDAQ	ATRO	Mon, Oct 9, 2000	5.19	5.25	5.19	5.25
2102	NASDAQ	ATRO	Fri, Oct 6, 2000	4.99	5.11	4.99	5.11
2101	NASDAQ	ATRO	Thu, Oct 5, 2000	5.14	5.14	4.99	4.99
2100	NASDAQ	ATRO	Wed, Oct 4, 2000	4.91	5.22	4.91	5.22
2099	NASDAQ	ATRO	Tue, Oct 3, 2000	4.88	4.88	4.88	4.88
2098	NASDAQ	ATRO	Fri, Sep 29, 2000	4.88	4.88	4.88	4.88
2097	NASDAQ	ATRO	Thu, Sep 28, 2000	4.94	4.94	4.85	4.85
2096	NASDAQ	ATRO	Wed, Sep 27, 2000	4.74	4.99	4.68	4.97
2095	NASDAQ	ATRO	Tue, Sep 26, 2000	4.84	4.84	4.74	4.74
2094	NASDAQ	ATRO	Mon, Sep 25, 2000	4.74	4.79	4.74	4.77
2093	NASDAQ	ATRO	Fri, Sep 22, 2000	4.74	4.91	4.74	4.91
2092	NASDAQ	ATRO	Thu, Sep 21, 2000	4.74	4.79	4.74	4.74
2091	NASDAQ	ATRO	Wed, Sep 20, 2000	4.94	4.94	4.79	4.79
2090	NASDAQ	ATRO	Tue, Sep 19, 2000	4.88	4.88	4.88	4.88
2089	NASDAQ	ATRO	Mon, Sep 18, 2000	4.74	4.94	4.74	4.79
2088	NASDAQ	ATRO	Fri, Sep 15, 2000	4.79	4.94	4.79	4.94
2087	NASDAQ	ATRO	Thu, Sep 14, 2000	4.87	4.99	4.87	4.99
2086	NASDAQ	ATRO	Wed, Sep 13, 2000	4.79	4.91	4.79	4.91
2085	NASDAQ	ATRO	Tue, Sep 12, 2000	4.79	4.79	4.74	4.79
2084	NASDAQ	ATRO	Mon, Sep 11, 2000	4.82	4.82	4.74	4.74
2083	NASDAQ	ATRO	Thu, Sep 7, 2000	4.71	5.02	4.71	5.02
2082	NASDAQ	ATRO	Wed, Sep 6, 2000	5.02	5.02	4.97	4.97
2081	NASDAQ	ATRO	Tue, Sep 5, 2000	4.79	4.79	4.71	4.79
2080	NASDAQ	ATRO	Fri, Sep 1, 2000	4.79	5.02	4.77	4.77
2079	NASDAQ	ATRO	Thu, Aug 31, 2000	4.79	4.79	4.79	4.79
2078	NASDAQ	ATRO	Tue, Aug 29, 2000	4.57	4.62	4.57	4.62
2077	NASDAQ	ATRO	Fri, Aug 25, 2000	4.79	4.79	4.79	4.79
2076	NASDAQ	ATRO	Thu, Aug 24, 2000	4.65	4.65	4.48	4.48
2075	NASDAQ	ATRO	Tue, Aug 22, 2000	4.68	4.85	4.54	4.85
2074	NASDAQ	ATRO	Mon, Aug 21, 2000	4.65	4.68	4.59	4.68
2073	NASDAQ	ATRO	Fri, Aug 18, 2000	4.57	4.71	4.57	4.71
2072	NASDAQ	ATRO	Tue, Aug 15, 2000	4.57	4.68	4.57	4.68
2071	NASDAQ	ATRO	Mon, Aug 14, 2000	4.25	4.28	4.22	4.22
2070	NASDAQ	ATRO	Fri, Aug 11, 2000	4.88	4.88	4.25	4.45
2069	NASDAQ	ATRO	Thu, Aug 10, 2000	4.97	4.97	4.79	4.79
2068	NASDAQ	ATRO	Wed, Aug 9, 2000	4.59	4.97	4.45	4.97
2067	NASDAQ	ATRO	Tue, Aug 8, 2000	4.94	4.97	4.45	4.97
2066	NASDAQ	ATRO	Mon, Aug 7, 2000	4.97	4.97	4.97	4.97
2065	NASDAQ	ATRO	Fri, Aug 4, 2000	4.91	5.08	4.82	4.97
2064	NASDAQ	ATRO	Thu, Aug 3, 2000	4.79	5.11	4.79	5.02
2063	NASDAQ	ATRO	Wed, Aug 2, 2000	4.77	4.97	4.77	4.91
2062	NASDAQ	ATRO	Tue, Aug 1, 2000	4.79	5.02	4.79	4.85
2061	NASDAQ	ATRO	Mon, Jul 31, 2000	4.45	4.74	4.11	4.62
2060	NASDAQ	ATRO	Fri, Jul 28, 2000	4.45	4.57	4.45	4.57
2059	NASDAQ	ATRO	Thu, Jul 27, 2000	4.45	4.57	4.45	4.57
2058	NASDAQ	ATRO	Wed, Jul 26, 2000	4.45	4.57	4.45	4.57
2057	NASDAQ	ATRO	Tue, Jul 25, 2000	4.39	4.48	4.34	4.45
2056	NASDAQ	ATRO	Fri, Jul 21, 2000	4.28	4.28	4.28	4.28
2055	NASDAQ	ATRO	Thu, Jul 20, 2000	4.22	4.39	4.22	4.39
2054	NASDAQ	ATRO	Wed, Jul 19, 2000	4.11	4.34	4.11	4.34
2053	NASDAQ	ATRO	Tue, Jul 18, 2000	4.28	4.39	4.28	4.39
2052	NASDAQ	ATRO	Mon, Jul 17, 2000	4.22	4.22	4.22	4.22
2051	NASDAQ	ATRO	Fri, Jul 14, 2000	4.22	4.28	4.22	4.28
2050	NASDAQ	ATRO	Thu, Jul 13, 2000	4.22	4.22	4.22	4.22
2049	NASDAQ	ATRO	Wed, Jul 12, 2000	4.22	4.22	4.22	4.22
2048	NASDAQ	ATRO	Tue, Jul 11, 2000	4.22	4.22	4.22	4.22
2047	NASDAQ	ATRO	Mon, Jul 10, 2000	4.22	4.22	4.22	4.22
2046	NASDAQ	ATRO	Fri, Jul 7, 2000	4.42	4.42	4.22	4.34
2045	NASDAQ	ATRO	Thu, Jul 6, 2000	4.25	4.25	4.22	4.22
2044	NASDAQ	ATRO	Mon, Jul 3, 2000	4.31	4.39	4.31	4.39
2043	NASDAQ	ATRO	Fri, Jun 30, 2000	4.34	4.34	4.22	4.22
2042	NASDAQ	ATRO	Thu, Jun 29, 2000	4.22	4.22	4.22	4.22
2041	NASDAQ	ATRO	Wed, Jun 28, 2000	4.31	4.39	4.22	4.22
2040	NASDAQ	ATRO	Tue, Jun 27, 2000	4.22	4.22	4.22	4.22
2039	NASDAQ	ATRO	Mon, Jun 26, 2000	4.17	4.17	4.17	4.17
2038	NASDAQ	ATRO	Thu, Jun 22, 2000	4.24	4.31	4.17	4.31
2037	NASDAQ	ATRO	Wed, Jun 21, 2000	4.05	4.28	4.05	4.28
2036	NASDAQ	ATRO	Mon, Jun 19, 2000	4.14	4.22	4.11	4.14
2035	NASDAQ	ATRO	Fri, Jun 16, 2000	4.31	4.39	4.22	4.22
2034	NASDAQ	ATRO	Thu, Jun 15, 2000	4.11	4.11	4.11	4.11
2033	NASDAQ	ATRO	Wed, Jun 14, 2000	4.11	4.11	4.11	4.11
2032	NASDAQ	ATRO	Tue, Jun 13, 2000	4.42	4.42	4.42	4.42
2031	NASDAQ	ATRO	Fri, Jun 9, 2000	4.45	4.45	4.08	4.45
2030	NASDAQ	ATRO	Thu, Jun 8, 2000	4.20	4.20	4.20	4.20
2029	NASDAQ	ATRO	Wed, Jun 7, 2000	4.20	4.20	4.20	4.20
2028	NASDAQ	ATRO	Tue, Jun 6, 2000	4.20	4.20	4.05	4.05
2027	NASDAQ	ATRO	Mon, Jun 5, 2000	4.22	4.22	4.02	4.02
2026	NASDAQ	ATRO	Fri, Jun 2, 2000	4.00	4.22	4.00	4.14
2025	NASDAQ	ATRO	Thu, Jun 1, 2000	4.08	4.11	4.08	4.08
2024	NASDAQ	ATRO	Tue, May 30, 2000	4.08	4.08	3.90	3.90
2023	NASDAQ	ATRO	Fri, May 26, 2000	4.28	4.28	4.28	4.28
2022	NASDAQ	ATRO	Thu, May 25, 2000	4.08	4.39	4.00	4.39
2021	NASDAQ	ATRO	Wed, May 24, 2000	4.00	4.08	4.00	4.08
2020	NASDAQ	ATRO	Tue, May 23, 2000	4.02	4.02	3.94	4.00
2019	NASDAQ	ATRO	Mon, May 22, 2000	4.24	4.25	4.02	4.02
2018	NASDAQ	ATRO	Fri, May 19, 2000	4.25	4.25	4.25	4.25
2017	NASDAQ	ATRO	Thu, May 18, 2000	4.25	4.25	4.25	4.25
2016	NASDAQ	ATRO	Wed, May 17, 2000	4.22	4.31	4.22	4.31
2015	NASDAQ	ATRO	Tue, May 16, 2000	4.12	4.20	4.11	4.20
2014	NASDAQ	ATRO	Mon, May 15, 2000	4.20	4.20	3.94	4.20
2013	NASDAQ	ATRO	Fri, May 12, 2000	4.17	4.34	4.00	4.00
2012	NASDAQ	ATRO	Thu, May 11, 2000	4.11	4.11	4.11	4.11
2011	NASDAQ	ATRO	Wed, May 10, 2000	4.11	4.17	4.05	4.05
2010	NASDAQ	ATRO	Tue, May 9, 2000	4.05	4.22	4.05	4.22
2009	NASDAQ	ATRO	Mon, May 8, 2000	4.22	4.34	4.00	4.00
2008	NASDAQ	ATRO	Fri, May 5, 2000	4.00	4.17	3.91	4.17
2007	NASDAQ	ATRO	Thu, May 4, 2000	4.02	4.11	3.74	4.11
2006	NASDAQ	ATRO	Wed, May 3, 2000	4.12	4.12	3.88	4.02
2005	NASDAQ	ATRO	Tue, May 2, 2000	4.57	4.57	4.05	4.34
2004	NASDAQ	ATRO	Mon, May 1, 2000	4.11	4.39	4.11	4.39
2003	NASDAQ	ATRO	Fri, Apr 28, 2000	4.11	4.57	4.11	4.57
2002	NASDAQ	ATRO	Thu, Apr 27, 2000	4.57	4.57	4.11	4.28
2001	NASDAQ	ATRO	Wed, Apr 26, 2000	4.57	4.68	4.51	4.51
2000	NASDAQ	ATRO	Tue, Apr 25, 2000	4.57	4.68	4.51	4.68
1999	NASDAQ	ATRO	Mon, Apr 24, 2000	4.74	4.74	4.54	4.54
1998	NASDAQ	ATRO	Thu, Apr 20, 2000	4.74	4.79	4.54	4.54
1997	NASDAQ	ATRO	Wed, Apr 19, 2000	4.57	4.79	4.57	4.79
1996	NASDAQ	ATRO	Tue, Apr 18, 2000	4.59	4.79	4.59	4.79
1995	NASDAQ	ATRO	Mon, Apr 17, 2000	4.79	4.79	4.79	4.79
1994	NASDAQ	ATRO	Fri, Apr 14, 2000	4.68	4.79	4.62	4.79
1993	NASDAQ	ATRO	Thu, Apr 13, 2000	4.57	4.65	4.37	4.65
1992	NASDAQ	ATRO	Wed, Apr 12, 2000	5.02	5.25	4.11	4.34
1991	NASDAQ	ATRO	Tue, Apr 11, 2000	5.08	5.31	5.08	5.08
1990	NASDAQ	ATRO	Mon, Apr 10, 2000	5.34	5.34	5.14	5.14
1989	NASDAQ	ATRO	Fri, Apr 7, 2000	5.02	5.39	5.02	5.39
1988	NASDAQ	ATRO	Thu, Apr 6, 2000	5.37	5.37	5.19	5.19
1987	NASDAQ	ATRO	Wed, Apr 5, 2000	5.02	5.37	5.02	5.37
1986	NASDAQ	ATRO	Tue, Apr 4, 2000	5.25	5.31	5.02	5.31
1985	NASDAQ	ATRO	Mon, Apr 3, 2000	5.02	5.25	5.02	5.25
1984	NASDAQ	ATRO	Fri, Mar 31, 2000	5.25	5.25	5.08	5.25
1983	NASDAQ	ATRO	Thu, Mar 30, 2000	5.19	5.19	4.99	5.08
1982	NASDAQ	ATRO	Wed, Mar 29, 2000	4.97	5.42	4.97	5.42
1981	NASDAQ	ATRO	Tue, Mar 28, 2000	5.02	5.28	5.02	5.17
1980	NASDAQ	ATRO	Mon, Mar 27, 2000	4.94	5.11	4.94	5.11
1979	NASDAQ	ATRO	Fri, Mar 24, 2000	4.91	5.02	4.91	5.02
1978	NASDAQ	ATRO	Thu, Mar 23, 2000	4.79	4.91	4.79	4.85
1977	NASDAQ	ATRO	Wed, Mar 22, 2000	4.79	4.88	4.79	4.79
1976	NASDAQ	ATRO	Tue, Mar 21, 2000	4.68	4.97	4.68	4.97
1975	NASDAQ	ATRO	Mon, Mar 20, 2000	4.79	4.79	4.79	4.79
1974	NASDAQ	ATRO	Fri, Mar 17, 2000	4.79	4.91	4.57	4.77
1973	NASDAQ	ATRO	Thu, Mar 16, 2000	4.68	4.85	4.62	4.79
1972	NASDAQ	ATRO	Wed, Mar 15, 2000	4.65	4.79	4.34	4.65
1971	NASDAQ	ATRO	Tue, Mar 14, 2000	4.35	4.65	4.35	4.65
1970	NASDAQ	ATRO	Mon, Mar 13, 2000	4.65	4.65	4.65	4.65
1969	NASDAQ	ATRO	Fri, Mar 10, 2000	4.39	4.82	4.34	4.82
1968	NASDAQ	ATRO	Thu, Mar 9, 2000	4.68	4.97	4.45	4.88
1967	NASDAQ	ATRO	Wed, Mar 8, 2000	4.57	5.02	4.51	4.68
1966	NASDAQ	ATRO	Tue, Mar 7, 2000	4.48	5.08	4.48	4.79
1965	NASDAQ	ATRO	Mon, Mar 6, 2000	4.28	4.31	4.28	4.31
1964	NASDAQ	ATRO	Fri, Mar 3, 2000	4.17	4.17	4.17	4.17
1963	NASDAQ	ATRO	Thu, Mar 2, 2000	4.05	4.24	4.05	4.24
1962	NASDAQ	ATRO	Wed, Mar 1, 2000	4.05	4.05	4.05	4.05
1961	NASDAQ	ATRO	Mon, Feb 28, 2000	4.07	4.20	4.05	4.20
1960	NASDAQ	ATRO	Fri, Feb 25, 2000	4.08	4.08	4.05	4.05
1959	NASDAQ	ATRO	Thu, Feb 24, 2000	4.08	4.08	4.00	4.00
1958	NASDAQ	ATRO	Wed, Feb 23, 2000	4.17	4.17	4.08	4.08
1957	NASDAQ	ATRO	Tue, Feb 22, 2000	4.34	4.34	4.17	4.20
1956	NASDAQ	ATRO	Thu, Feb 17, 2000	4.42	4.42	4.25	4.25
1955	NASDAQ	ATRO	Wed, Feb 16, 2000	4.45	4.45	4.45	4.45
1954	NASDAQ	ATRO	Tue, Feb 15, 2000	4.45	4.45	4.17	4.17
1953	NASDAQ	ATRO	Mon, Feb 14, 2000	4.27	4.45	4.17	4.28
1952	NASDAQ	ATRO	Fri, Feb 11, 2000	4.44	4.44	4.20	4.20
1951	NASDAQ	ATRO	Thu, Feb 10, 2000	4.39	4.51	4.39	4.45
1950	NASDAQ	ATRO	Wed, Feb 9, 2000	4.39	4.39	4.39	4.39
1949	NASDAQ	ATRO	Tue, Feb 8, 2000	4.57	4.57	4.39	4.39
1948	NASDAQ	ATRO	Mon, Feb 7, 2000	4.34	4.57	4.34	4.57
1947	NASDAQ	ATRO	Fri, Feb 4, 2000	4.45	4.45	4.45	4.45
1946	NASDAQ	ATRO	Thu, Feb 3, 2000	4.57	4.74	4.57	4.57
1945	NASDAQ	ATRO	Wed, Feb 2, 2000	4.74	4.74	4.62	4.62
1944	NASDAQ	ATRO	Tue, Feb 1, 2000	5.02	5.02	4.45	4.51
1943	NASDAQ	ATRO	Mon, Jan 31, 2000	4.74	4.74	4.74	4.74
1942	NASDAQ	ATRO	Fri, Jan 28, 2000	4.74	5.14	4.74	5.14
1941	NASDAQ	ATRO	Thu, Jan 27, 2000	5.31	5.31	4.91	4.91
1940	NASDAQ	ATRO	Wed, Jan 26, 2000	5.21	5.31	5.21	5.31
1939	NASDAQ	ATRO	Tue, Jan 25, 2000	5.14	5.42	5.11	5.37
1938	NASDAQ	ATRO	Mon, Jan 24, 2000	5.45	5.48	5.11	5.19
1937	NASDAQ	ATRO	Fri, Jan 21, 2000	5.02	5.45	5.02	5.39
1936	NASDAQ	ATRO	Thu, Jan 20, 2000	4.91	5.37	4.91	5.37
1935	NASDAQ	ATRO	Wed, Jan 19, 2000	4.79	4.91	4.71	4.87
1934	NASDAQ	ATRO	Tue, Jan 18, 2000	4.62	4.79	4.45	4.79
1933	NASDAQ	ATRO	Fri, Jan 14, 2000	4.65	4.65	4.62	4.65
1932	NASDAQ	ATRO	Thu, Jan 13, 2000	4.82	4.82	4.71	4.82
1931	NASDAQ	ATRO	Wed, Jan 12, 2000	4.71	4.79	4.71	4.79
1930	NASDAQ	ATRO	Tue, Jan 11, 2000	4.62	4.65	4.62	4.65
1929	NASDAQ	ATRO	Mon, Jan 10, 2000	4.62	4.71	4.62	4.71
1928	NASDAQ	ATRO	Fri, Jan 7, 2000	4.62	4.68	4.62	4.62
1927	NASDAQ	ATRO	Thu, Jan 6, 2000	4.59	4.68	4.59	4.68
1926	NASDAQ	ATRO	Wed, Jan 5, 2000	4.62	4.68	4.51	4.62
1925	NASDAQ	ATRO	Tue, Jan 4, 2000	4.62	4.65	4.62	4.62
1924	NASDAQ	ATRO	Mon, Jan 3, 2000	4.77	4.77	4.62	4.62
1923	NASDAQ	ATRO	Thu, Dec 30, 1999	4.65	4.65	4.62	4.62
1922	NASDAQ	ATRO	Tue, Dec 28, 1999	4.62	4.79	4.62	4.79
1921	NASDAQ	ATRO	Mon, Dec 27, 1999	5.14	5.14	4.62	4.79
1920	NASDAQ	ATRO	Thu, Dec 23, 1999	5.14	5.14	5.08	5.08
1919	NASDAQ	ATRO	Wed, Dec 22, 1999	4.79	5.08	4.79	5.05
1918	NASDAQ	ATRO	Tue, Dec 21, 1999	4.79	4.79	4.79	4.79
1917	NASDAQ	ATRO	Mon, Dec 20, 1999	4.57	4.68	4.57	4.68
1916	NASDAQ	ATRO	Fri, Dec 17, 1999	4.51	4.62	4.51	4.62
1915	NASDAQ	ATRO	Thu, Dec 16, 1999	4.57	4.57	4.57	4.57
1914	NASDAQ	ATRO	Wed, Dec 15, 1999	4.51	4.54	4.45	4.54
1913	NASDAQ	ATRO	Tue, Dec 14, 1999	4.37	4.51	4.37	4.51
1912	NASDAQ	ATRO	Mon, Dec 13, 1999	4.34	4.51	4.28	4.51
1911	NASDAQ	ATRO	Fri, Dec 10, 1999	4.02	4.34	4.02	4.34
1910	NASDAQ	ATRO	Thu, Dec 9, 1999	4.31	4.34	4.31	4.31
1909	NASDAQ	ATRO	Wed, Dec 8, 1999	4.31	4.37	4.31	4.31
1908	NASDAQ	ATRO	Tue, Dec 7, 1999	4.28	4.37	4.28	4.37
1907	NASDAQ	ATRO	Mon, Dec 6, 1999	4.34	4.42	4.34	4.39
1906	NASDAQ	ATRO	Fri, Dec 3, 1999	4.34	4.39	4.34	4.34
1905	NASDAQ	ATRO	Thu, Dec 2, 1999	4.34	4.39	4.34	4.34
1904	NASDAQ	ATRO	Wed, Dec 1, 1999	4.39	4.39	4.39	4.39
1903	NASDAQ	ATRO	Tue, Nov 30, 1999	4.28	4.34	4.28	4.34
1902	NASDAQ	ATRO	Mon, Nov 29, 1999	4.25	4.25	4.22	4.22
1901	NASDAQ	ATRO	Fri, Nov 26, 1999	4.39	4.45	4.17	4.20
1900	NASDAQ	ATRO	Wed, Nov 24, 1999	4.20	4.39	4.20	4.39
1899	NASDAQ	ATRO	Tue, Nov 23, 1999	4.17	4.22	4.17	4.22
1898	NASDAQ	ATRO	Mon, Nov 22, 1999	4.17	4.22	4.17	4.22
1897	NASDAQ	ATRO	Fri, Nov 19, 1999	4.34	4.34	4.11	4.34
1896	NASDAQ	ATRO	Thu, Nov 18, 1999	4.37	4.37	4.34	4.34
1895	NASDAQ	ATRO	Wed, Nov 17, 1999	4.39	4.39	4.37	4.37
1894	NASDAQ	ATRO	Tue, Nov 16, 1999	4.37	4.45	4.37	4.45
1893	NASDAQ	ATRO	Mon, Nov 15, 1999	4.45	4.45	4.39	4.45
1892	NASDAQ	ATRO	Fri, Nov 12, 1999	4.39	4.45	4.39	4.39
1891	NASDAQ	ATRO	Thu, Nov 11, 1999	4.45	4.45	4.45	4.45
1890	NASDAQ	ATRO	Wed, Nov 10, 1999	4.45	4.45	4.45	4.45
1889	NASDAQ	ATRO	Tue, Nov 9, 1999	4.51	4.51	4.51	4.51
1888	NASDAQ	ATRO	Mon, Nov 8, 1999	4.45	4.45	4.39	4.42
1887	NASDAQ	ATRO	Fri, Nov 5, 1999	4.39	4.39	4.39	4.39
1886	NASDAQ	ATRO	Thu, Nov 4, 1999	4.39	4.39	4.39	4.39
1885	NASDAQ	ATRO	Wed, Nov 3, 1999	4.51	4.51	4.39	4.45
1884	NASDAQ	ATRO	Tue, Nov 2, 1999	4.48	4.51	4.39	4.51
1883	NASDAQ	ATRO	Mon, Nov 1, 1999	4.39	4.45	4.37	4.45
1882	NASDAQ	ATRO	Fri, Oct 29, 1999	4.51	4.51	4.39	4.39
1881	NASDAQ	ATRO	Thu, Oct 28, 1999	4.34	4.51	4.11	4.39
1880	NASDAQ	ATRO	Wed, Oct 27, 1999	4.17	4.17	4.17	4.17
1879	NASDAQ	ATRO	Tue, Oct 26, 1999	4.05	4.05	4.05	4.05
1878	NASDAQ	ATRO	Mon, Oct 25, 1999	4.00	4.00	3.94	3.94
1877	NASDAQ	ATRO	Fri, Oct 22, 1999	3.94	4.11	3.94	4.08
1876	NASDAQ	ATRO	Thu, Oct 21, 1999	3.94	3.94	3.94	3.94
1875	NASDAQ	ATRO	Wed, Oct 20, 1999	3.88	4.22	3.88	4.22
1874	NASDAQ	ATRO	Tue, Oct 19, 1999	4.28	4.28	4.00	4.00
1873	NASDAQ	ATRO	Mon, Oct 18, 1999	3.85	3.85	3.85	3.85
1872	NASDAQ	ATRO	Fri, Oct 15, 1999	3.82	4.11	3.82	3.94
1871	NASDAQ	ATRO	Thu, Oct 14, 1999	3.86	4.34	3.86	4.28
1870	NASDAQ	ATRO	Wed, Oct 13, 1999	3.78	3.80	3.78	3.80
1869	NASDAQ	ATRO	Tue, Oct 12, 1999	3.80	3.82	3.78	3.78
1868	NASDAQ	ATRO	Mon, Oct 11, 1999	3.65	3.85	3.65	3.80
1867	NASDAQ	ATRO	Fri, Oct 8, 1999	3.71	3.77	3.57	3.71
1866	NASDAQ	ATRO	Thu, Oct 7, 1999	3.68	3.77	3.65	3.71
1865	NASDAQ	ATRO	Wed, Oct 6, 1999	3.80	3.80	3.42	3.60
1864	NASDAQ	ATRO	Tue, Oct 5, 1999	3.82	3.88	3.77	3.88
1863	NASDAQ	ATRO	Mon, Oct 4, 1999	4.11	4.11	3.82	3.82
1862	NASDAQ	ATRO	Fri, Oct 1, 1999	3.85	3.88	3.85	3.88
1861	NASDAQ	ATRO	Thu, Sep 30, 1999	4.28	4.28	3.05	3.88
1860	NASDAQ	ATRO	Wed, Sep 29, 1999	4.57	4.57	4.11	4.11
1859	NASDAQ	ATRO	Tue, Sep 28, 1999	4.39	4.39	4.39	4.39
1858	NASDAQ	ATRO	Fri, Sep 24, 1999	4.25	4.25	4.25	4.25
1857	NASDAQ	ATRO	Thu, Sep 23, 1999	4.25	4.25	4.25	4.25
1856	NASDAQ	ATRO	Wed, Sep 22, 1999	4.22	4.28	4.11	4.28
1855	NASDAQ	ATRO	Tue, Sep 21, 1999	4.22	4.45	4.22	4.45
1854	NASDAQ	ATRO	Mon, Sep 20, 1999	4.48	4.48	4.20	4.20
1853	NASDAQ	ATRO	Fri, Sep 17, 1999	4.51	4.51	4.51	4.51
1852	NASDAQ	ATRO	Thu, Sep 16, 1999	4.22	4.39	4.22	4.39
1851	NASDAQ	ATRO	Wed, Sep 15, 1999	4.39	4.39	4.22	4.22
1850	NASDAQ	ATRO	Tue, Sep 14, 1999	4.39	4.39	4.39	4.39
1849	NASDAQ	ATRO	Mon, Sep 13, 1999	4.34	4.34	4.34	4.34
1848	NASDAQ	ATRO	Fri, Sep 10, 1999	4.34	4.34	4.34	4.34
1847	NASDAQ	ATRO	Thu, Sep 9, 1999	4.51	4.51	4.45	4.45
1846	NASDAQ	ATRO	Wed, Sep 8, 1999	4.45	4.51	4.45	4.51
1845	NASDAQ	ATRO	Tue, Sep 7, 1999	4.45	4.51	4.45	4.45
1844	NASDAQ	ATRO	Fri, Sep 3, 1999	4.34	4.45	4.31	4.31
1843	NASDAQ	ATRO	Thu, Sep 2, 1999	4.34	4.34	4.34	4.34
1842	NASDAQ	ATRO	Wed, Sep 1, 1999	4.48	4.48	4.48	4.48
1841	NASDAQ	ATRO	Tue, Aug 31, 1999	4.45	4.57	4.34	4.34
1840	NASDAQ	ATRO	Mon, Aug 30, 1999	4.51	4.51	4.34	4.34
1839	NASDAQ	ATRO	Fri, Aug 27, 1999	4.51	4.51	4.28	4.31
1838	NASDAQ	ATRO	Thu, Aug 26, 1999	4.77	4.81	4.45	4.45
1837	NASDAQ	ATRO	Wed, Aug 25, 1999	4.79	4.79	4.79	4.79
1836	NASDAQ	ATRO	Tue, Aug 24, 1999	4.85	4.94	4.85	4.94
1835	NASDAQ	ATRO	Mon, Aug 23, 1999	4.77	4.77	4.77	4.77
1834	NASDAQ	ATRO	Fri, Aug 20, 1999	5.02	5.02	5.02	5.02
1833	NASDAQ	ATRO	Wed, Aug 18, 1999	4.74	4.91	4.74	4.91
1832	NASDAQ	ATRO	Mon, Aug 16, 1999	4.79	5.08	4.79	5.08
1831	NASDAQ	ATRO	Thu, Aug 12, 1999	5.02	5.02	4.68	4.85
1830	NASDAQ	ATRO	Wed, Aug 11, 1999	5.42	5.42	4.79	4.79
1829	NASDAQ	ATRO	Tue, Aug 10, 1999	4.68	5.22	4.57	5.22
1828	NASDAQ	ATRO	Mon, Aug 9, 1999	4.82	4.91	4.82	4.91
1827	NASDAQ	ATRO	Fri, Aug 6, 1999	4.79	4.79	4.79	4.79
1826	NASDAQ	ATRO	Thu, Aug 5, 1999	4.79	4.79	4.79	4.79
1825	NASDAQ	ATRO	Wed, Aug 4, 1999	4.85	4.85	4.68	4.68
1824	NASDAQ	ATRO	Tue, Aug 3, 1999	4.85	4.91	4.85	4.91
1823	NASDAQ	ATRO	Mon, Aug 2, 1999	4.79	5.02	4.57	5.02
1822	NASDAQ	ATRO	Fri, Jul 30, 1999	4.57	4.97	4.57	4.97
1821	NASDAQ	ATRO	Thu, Jul 29, 1999	4.79	4.79	4.51	4.51
1820	NASDAQ	ATRO	Wed, Jul 28, 1999	5.02	5.02	4.79	4.79
1819	NASDAQ	ATRO	Tue, Jul 27, 1999	5.39	5.42	5.25	5.25
1818	NASDAQ	ATRO	Mon, Jul 26, 1999	5.48	5.48	5.42	5.42
1817	NASDAQ	ATRO	Fri, Jul 23, 1999	5.49	5.68	5.42	5.68
1816	NASDAQ	ATRO	Thu, Jul 22, 1999	5.59	5.59	5.42	5.42
1815	NASDAQ	ATRO	Wed, Jul 21, 1999	5.59	5.68	5.48	5.65
1814	NASDAQ	ATRO	Tue, Jul 20, 1999	5.71	5.76	5.54	5.59
1813	NASDAQ	ATRO	Mon, Jul 19, 1999	5.56	5.71	5.39	5.62
1812	NASDAQ	ATRO	Fri, Jul 16, 1999	5.48	5.54	5.48	5.54
1811	NASDAQ	ATRO	Thu, Jul 15, 1999	5.11	5.42	5.11	5.37
1810	NASDAQ	ATRO	Wed, Jul 14, 1999	5.08	5.37	5.02	5.19
1809	NASDAQ	ATRO	Tue, Jul 13, 1999	5.14	5.19	5.14	5.19
1808	NASDAQ	ATRO	Mon, Jul 12, 1999	5.02	5.14	5.02	5.02
1807	NASDAQ	ATRO	Fri, Jul 9, 1999	5.08	5.08	4.85	5.05
1806	NASDAQ	ATRO	Thu, Jul 8, 1999	5.02	5.08	4.91	5.02
1805	NASDAQ	ATRO	Wed, Jul 7, 1999	4.79	4.91	4.79	4.91
1804	NASDAQ	ATRO	Tue, Jul 6, 1999	4.77	4.85	4.74	4.85
1803	NASDAQ	ATRO	Fri, Jul 2, 1999	4.79	4.91	4.79	4.88
1802	NASDAQ	ATRO	Thu, Jul 1, 1999	4.74	4.85	4.68	4.85
1801	NASDAQ	ATRO	Wed, Jun 30, 1999	4.57	4.57	4.57	4.57
1800	NASDAQ	ATRO	Tue, Jun 29, 1999	4.62	4.62	4.57	4.57
1799	NASDAQ	ATRO	Mon, Jun 28, 1999	4.62	4.68	4.57	4.57
1798	NASDAQ	ATRO	Fri, Jun 25, 1999	4.68	4.79	4.68	4.68
1797	NASDAQ	ATRO	Thu, Jun 24, 1999	4.57	4.57	4.51	4.51
1796	NASDAQ	ATRO	Wed, Jun 23, 1999	4.62	4.62	4.57	4.62
1795	NASDAQ	ATRO	Tue, Jun 22, 1999	4.57	4.68	4.57	4.68
1794	NASDAQ	ATRO	Mon, Jun 21, 1999	4.34	4.65	4.28	4.65
1793	NASDAQ	ATRO	Fri, Jun 18, 1999	4.02	4.34	4.02	4.34
1792	NASDAQ	ATRO	Thu, Jun 17, 1999	4.10	4.17	4.02	4.17
1791	NASDAQ	ATRO	Wed, Jun 16, 1999	4.34	4.34	4.11	4.17
1790	NASDAQ	ATRO	Tue, Jun 15, 1999	4.37	4.39	4.22	4.22
1789	NASDAQ	ATRO	Mon, Jun 14, 1999	4.22	4.34	4.22	4.34
1788	NASDAQ	ATRO	Fri, Jun 11, 1999	4.22	4.34	4.00	4.17
1787	NASDAQ	ATRO	Thu, Jun 10, 1999	4.28	4.34	4.28	4.34
1786	NASDAQ	ATRO	Wed, Jun 9, 1999	4.22	4.34	4.17	4.34
1785	NASDAQ	ATRO	Tue, Jun 8, 1999	4.28	4.28	4.28	4.28
1784	NASDAQ	ATRO	Mon, Jun 7, 1999	4.28	4.34	4.22	4.28
1783	NASDAQ	ATRO	Fri, Jun 4, 1999	4.05	4.34	4.05	4.28
1782	NASDAQ	ATRO	Wed, Jun 2, 1999	4.11	4.11	4.00	4.00
1781	NASDAQ	ATRO	Tue, Jun 1, 1999	4.22	4.22	4.11	4.11
1780	NASDAQ	ATRO	Fri, May 28, 1999	4.00	4.11	4.00	4.11
1779	NASDAQ	ATRO	Thu, May 27, 1999	4.00	4.11	4.00	4.11
1778	NASDAQ	ATRO	Wed, May 26, 1999	4.05	4.05	4.05	4.05
1777	NASDAQ	ATRO	Tue, May 25, 1999	4.05	4.11	4.00	4.11
1776	NASDAQ	ATRO	Mon, May 24, 1999	4.11	4.11	4.05	4.11
1775	NASDAQ	ATRO	Fri, May 21, 1999	4.05	4.05	4.00	4.00
1774	NASDAQ	ATRO	Thu, May 20, 1999	4.11	4.17	4.05	4.05
1773	NASDAQ	ATRO	Tue, May 18, 1999	4.17	4.17	4.11	4.11
1772	NASDAQ	ATRO	Mon, May 17, 1999	4.17	4.17	4.17	4.17
1771	NASDAQ	ATRO	Fri, May 14, 1999	4.11	4.34	4.11	4.34
1770	NASDAQ	ATRO	Thu, May 13, 1999	4.22	4.22	4.22	4.22
1769	NASDAQ	ATRO	Wed, May 12, 1999	4.28	4.34	4.22	4.22
1768	NASDAQ	ATRO	Tue, May 11, 1999	4.34	4.34	4.28	4.28
1767	NASDAQ	ATRO	Mon, May 10, 1999	4.34	4.39	4.34	4.39
1766	NASDAQ	ATRO	Fri, May 7, 1999	4.42	4.42	4.28	4.39
1765	NASDAQ	ATRO	Thu, May 6, 1999	4.34	4.34	4.34	4.34
1764	NASDAQ	ATRO	Wed, May 5, 1999	4.28	4.45	4.28	4.34
1763	NASDAQ	ATRO	Tue, May 4, 1999	4.39	4.42	4.28	4.28
1762	NASDAQ	ATRO	Mon, May 3, 1999	4.28	4.34	4.22	4.28
1761	NASDAQ	ATRO	Fri, Apr 30, 1999	4.45	4.45	4.28	4.28
1760	NASDAQ	ATRO	Thu, Apr 29, 1999	4.51	4.51	4.14	4.31
1759	NASDAQ	ATRO	Wed, Apr 28, 1999	4.34	4.39	4.34	4.34
1758	NASDAQ	ATRO	Tue, Apr 27, 1999	4.11	4.22	3.91	4.22
1757	NASDAQ	ATRO	Mon, Apr 26, 1999	4.11	4.11	3.94	3.94
1756	NASDAQ	ATRO	Fri, Apr 23, 1999	4.00	4.11	3.88	4.00
1755	NASDAQ	ATRO	Thu, Apr 22, 1999	3.88	4.11	3.88	4.11
1754	NASDAQ	ATRO	Wed, Apr 21, 1999	4.34	4.34	4.05	4.05
1753	NASDAQ	ATRO	Tue, Apr 20, 1999	4.11	4.22	4.11	4.22
1752	NASDAQ	ATRO	Mon, Apr 19, 1999	4.11	4.11	4.11	4.11
1751	NASDAQ	ATRO	Fri, Apr 16, 1999	4.11	4.22	3.65	3.88
1750	NASDAQ	ATRO	Thu, Apr 15, 1999	4.02	4.22	3.65	4.17
1749	NASDAQ	ATRO	Wed, Apr 14, 1999	4.11	4.11	4.00	4.08
1748	NASDAQ	ATRO	Tue, Apr 13, 1999	4.17	4.22	4.11	4.22
1747	NASDAQ	ATRO	Mon, Apr 12, 1999	4.11	4.22	4.11	4.20
1746	NASDAQ	ATRO	Fri, Apr 9, 1999	4.14	4.20	4.14	4.20
1745	NASDAQ	ATRO	Thu, Apr 8, 1999	4.05	4.20	4.05	4.17
1744	NASDAQ	ATRO	Wed, Apr 7, 1999	4.20	4.20	4.05	4.20
1743	NASDAQ	ATRO	Tue, Apr 6, 1999	4.05	4.34	4.05	4.11
1742	NASDAQ	ATRO	Mon, Apr 5, 1999	4.17	4.17	4.05	4.05
1741	NASDAQ	ATRO	Thu, Apr 1, 1999	4.22	4.51	4.11	4.51
1740	NASDAQ	ATRO	Wed, Mar 31, 1999	4.22	4.68	4.00	4.34
1739	NASDAQ	ATRO	Tue, Mar 30, 1999	4.22	4.51	4.11	4.34
1738	NASDAQ	ATRO	Mon, Mar 29, 1999	4.39	4.39	4.39	4.39
1737	NASDAQ	ATRO	Fri, Mar 26, 1999	4.51	4.51	4.51	4.51
1736	NASDAQ	ATRO	Thu, Mar 25, 1999	4.74	4.74	4.57	4.57
1735	NASDAQ	ATRO	Wed, Mar 24, 1999	4.39	4.39	4.39	4.39
1734	NASDAQ	ATRO	Tue, Mar 23, 1999	4.34	4.39	4.34	4.34
1733	NASDAQ	ATRO	Mon, Mar 22, 1999	4.48	4.48	4.34	4.34
1732	NASDAQ	ATRO	Fri, Mar 19, 1999	4.57	4.62	4.39	4.39
1731	NASDAQ	ATRO	Thu, Mar 18, 1999	4.57	4.57	4.57	4.57
1730	NASDAQ	ATRO	Wed, Mar 17, 1999	4.57	4.57	4.57	4.57
1729	NASDAQ	ATRO	Tue, Mar 16, 1999	4.57	4.62	4.57	4.57
1728	NASDAQ	ATRO	Mon, Mar 15, 1999	4.57	4.57	4.57	4.57
1727	NASDAQ	ATRO	Fri, Mar 12, 1999	4.62	4.68	4.57	4.62
1726	NASDAQ	ATRO	Thu, Mar 11, 1999	4.68	4.68	4.57	4.57
1725	NASDAQ	ATRO	Wed, Mar 10, 1999	4.68	4.74	4.57	4.68
1724	NASDAQ	ATRO	Tue, Mar 9, 1999	4.68	4.68	4.68	4.68
1723	NASDAQ	ATRO	Mon, Mar 8, 1999	4.62	4.74	4.62	4.74
1722	NASDAQ	ATRO	Fri, Mar 5, 1999	4.91	4.91	4.91	4.91
1721	NASDAQ	ATRO	Thu, Mar 4, 1999	4.62	4.91	4.62	4.91
1720	NASDAQ	ATRO	Wed, Mar 3, 1999	4.68	4.68	4.68	4.68
1719	NASDAQ	ATRO	Tue, Mar 2, 1999	4.91	4.91	4.91	4.91
1718	NASDAQ	ATRO	Mon, Mar 1, 1999	4.79	4.79	4.79	4.79
1717	NASDAQ	ATRO	Fri, Feb 26, 1999	4.79	4.85	4.74	4.85
1716	NASDAQ	ATRO	Wed, Feb 24, 1999	5.05	5.05	5.05	5.05
1715	NASDAQ	ATRO	Tue, Feb 23, 1999	5.17	5.19	4.97	5.08
1714	NASDAQ	ATRO	Mon, Feb 22, 1999	4.97	5.19	4.97	5.08
1713	NASDAQ	ATRO	Fri, Feb 19, 1999	5.02	5.08	5.02	5.08
1712	NASDAQ	ATRO	Thu, Feb 18, 1999	4.97	5.02	4.97	5.02
1711	NASDAQ	ATRO	Wed, Feb 17, 1999	5.02	5.14	4.91	5.05
1710	NASDAQ	ATRO	Tue, Feb 16, 1999	4.79	5.08	4.79	4.79
1709	NASDAQ	ATRO	Fri, Feb 12, 1999	4.91	5.02	4.57	4.57
1708	NASDAQ	ATRO	Thu, Feb 11, 1999	5.02	5.02	4.79	4.79
1707	NASDAQ	ATRO	Wed, Feb 10, 1999	4.68	4.91	4.57	4.57
1706	NASDAQ	ATRO	Tue, Feb 9, 1999	4.57	4.91	4.57	4.68
1705	NASDAQ	ATRO	Mon, Feb 8, 1999	4.68	4.97	4.68	4.85
1704	NASDAQ	ATRO	Fri, Feb 5, 1999	4.68	4.68	4.68	4.68
1703	NASDAQ	ATRO	Thu, Feb 4, 1999	4.91	4.91	4.45	4.57
1702	NASDAQ	ATRO	Wed, Feb 3, 1999	4.45	4.91	4.45	4.85
1701	NASDAQ	ATRO	Tue, Feb 2, 1999	4.91	4.91	4.68	4.68
1700	NASDAQ	ATRO	Mon, Feb 1, 1999	4.79	5.14	4.79	5.08
1699	NASDAQ	ATRO	Fri, Jan 29, 1999	4.91	5.22	4.68	5.19
1698	NASDAQ	ATRO	Thu, Jan 28, 1999	4.79	5.02	4.79	4.91
1697	NASDAQ	ATRO	Wed, Jan 27, 1999	4.77	4.79	4.57	4.79
1696	NASDAQ	ATRO	Tue, Jan 26, 1999	4.20	4.57	4.20	4.45
1695	NASDAQ	ATRO	Mon, Jan 25, 1999	3.97	4.22	3.97	4.20
1694	NASDAQ	ATRO	Fri, Jan 22, 1999	4.11	4.11	4.11	4.11
1693	NASDAQ	ATRO	Wed, Jan 20, 1999	4.22	4.22	4.22	4.22
1692	NASDAQ	ATRO	Tue, Jan 19, 1999	4.37	4.37	4.37	4.37
1691	NASDAQ	ATRO	Fri, Jan 15, 1999	4.14	4.14	4.02	4.02
1690	NASDAQ	ATRO	Thu, Jan 14, 1999	4.14	4.39	4.14	4.39
1689	NASDAQ	ATRO	Wed, Jan 13, 1999	3.97	4.11	3.97	4.11
1688	NASDAQ	ATRO	Tue, Jan 12, 1999	4.08	4.11	3.91	4.11
1687	NASDAQ	ATRO	Mon, Jan 11, 1999	4.17	4.17	4.11	4.14
1686	NASDAQ	ATRO	Fri, Jan 8, 1999	4.11	4.14	4.11	4.14
1685	NASDAQ	ATRO	Thu, Jan 7, 1999	4.22	4.22	4.11	4.11
1684	NASDAQ	ATRO	Wed, Jan 6, 1999	4.11	4.17	4.11	4.17
1683	NASDAQ	ATRO	Tue, Jan 5, 1999	4.11	4.11	4.11	4.11
1682	NASDAQ	ATRO	Mon, Jan 4, 1999	4.54	4.54	4.11	4.11
1681	NASDAQ	ATRO	Thu, Dec 31, 1998	4.34	4.45	4.28	4.39
1680	NASDAQ	ATRO	Wed, Dec 30, 1998	4.74	4.74	4.57	4.57
1679	NASDAQ	ATRO	Tue, Dec 29, 1998	4.57	4.74	4.34	4.68
1678	NASDAQ	ATRO	Mon, Dec 28, 1998	4.74	4.74	3.88	4.34
1677	NASDAQ	ATRO	Thu, Dec 24, 1998	4.00	4.00	4.00	4.00
1676	NASDAQ	ATRO	Wed, Dec 23, 1998	4.05	4.22	3.88	4.00
1675	NASDAQ	ATRO	Tue, Dec 22, 1998	4.12	4.57	4.11	4.22
1674	NASDAQ	ATRO	Mon, Dec 21, 1998	4.11	4.11	4.11	4.11
1673	NASDAQ	ATRO	Fri, Dec 18, 1998	4.05	4.22	4.05	4.11
1672	NASDAQ	ATRO	Thu, Dec 17, 1998	3.88	4.11	3.88	4.11
1671	NASDAQ	ATRO	Wed, Dec 16, 1998	4.11	4.11	4.00	4.00
1670	NASDAQ	ATRO	Tue, Dec 15, 1998	4.11	4.11	4.11	4.11
1669	NASDAQ	ATRO	Mon, Dec 14, 1998	4.22	4.22	4.08	4.11
1668	NASDAQ	ATRO	Fri, Dec 11, 1998	4.17	4.17	4.11	4.11
1667	NASDAQ	ATRO	Thu, Dec 10, 1998	4.39	4.39	4.22	4.22
1666	NASDAQ	ATRO	Wed, Dec 9, 1998	4.17	4.39	4.17	4.22
1665	NASDAQ	ATRO	Tue, Dec 8, 1998	4.34	4.34	4.11	4.22
1664	NASDAQ	ATRO	Mon, Dec 7, 1998	3.91	4.34	3.91	4.22
1663	NASDAQ	ATRO	Fri, Dec 4, 1998	4.22	4.51	4.05	4.11
1662	NASDAQ	ATRO	Thu, Dec 3, 1998	4.28	4.28	4.28	4.28
1661	NASDAQ	ATRO	Wed, Dec 2, 1998	4.42	4.42	4.34	4.34
1660	NASDAQ	ATRO	Tue, Dec 1, 1998	4.39	4.57	4.34	4.39
1659	NASDAQ	ATRO	Mon, Nov 30, 1998	5.31	5.31	4.57	4.79
1658	NASDAQ	ATRO	Fri, Nov 27, 1998	5.19	5.42	5.02	5.31
1657	NASDAQ	ATRO	Wed, Nov 25, 1998	5.14	5.14	4.97	4.99
1656	NASDAQ	ATRO	Tue, Nov 24, 1998	4.85	5.14	4.74	5.05
1655	NASDAQ	ATRO	Mon, Nov 23, 1998	4.79	4.91	4.79	4.79
1654	NASDAQ	ATRO	Fri, Nov 20, 1998	4.62	4.85	4.62	4.68
1653	NASDAQ	ATRO	Thu, Nov 19, 1998	4.54	4.62	4.54	4.62
1652	NASDAQ	ATRO	Wed, Nov 18, 1998	4.39	4.45	4.34	4.45
1651	NASDAQ	ATRO	Tue, Nov 17, 1998	4.54	4.54	4.34	4.34
1650	NASDAQ	ATRO	Mon, Nov 16, 1998	4.17	4.42	4.17	4.39
1649	NASDAQ	ATRO	Fri, Nov 13, 1998	4.22	4.39	4.22	4.34
1648	NASDAQ	ATRO	Thu, Nov 12, 1998	4.39	4.39	4.22	4.22
1647	NASDAQ	ATRO	Wed, Nov 11, 1998	4.39	4.39	4.39	4.39
1646	NASDAQ	ATRO	Tue, Nov 10, 1998	4.39	4.39	4.39	4.39
1645	NASDAQ	ATRO	Mon, Nov 9, 1998	4.34	4.34	4.34	4.34
1644	NASDAQ	ATRO	Wed, Nov 4, 1998	4.34	4.62	4.34	4.34
1643	NASDAQ	ATRO	Tue, Nov 3, 1998	4.34	4.45	4.05	4.05
1642	NASDAQ	ATRO	Fri, Oct 30, 1998	4.17	4.34	4.17	4.34
1641	NASDAQ	ATRO	Thu, Oct 29, 1998	4.17	4.17	4.17	4.17
1640	NASDAQ	ATRO	Tue, Oct 27, 1998	4.17	4.17	4.17	4.17
1639	NASDAQ	ATRO	Mon, Oct 26, 1998	4.68	4.68	4.68	4.68
1638	NASDAQ	ATRO	Thu, Oct 22, 1998	4.62	4.62	4.62	4.62
1637	NASDAQ	ATRO	Wed, Oct 21, 1998	4.34	4.34	4.11	4.11
1636	NASDAQ	ATRO	Tue, Oct 20, 1998	4.68	4.68	4.11	4.68
1635	NASDAQ	ATRO	Mon, Oct 19, 1998	4.22	4.74	4.22	4.65
1634	NASDAQ	ATRO	Wed, Oct 14, 1998	3.77	4.11	3.77	4.11
1633	NASDAQ	ATRO	Tue, Oct 13, 1998	4.00	4.00	3.68	3.68
1632	NASDAQ	ATRO	Mon, Oct 12, 1998	3.79	3.79	3.79	3.79
1631	NASDAQ	ATRO	Fri, Oct 9, 1998	3.68	3.79	3.68	3.74
1630	NASDAQ	ATRO	Thu, Oct 8, 1998	3.74	3.74	3.74	3.74
1629	NASDAQ	ATRO	Wed, Oct 7, 1998	3.94	3.94	3.74	3.74
1628	NASDAQ	ATRO	Tue, Oct 6, 1998	3.94	3.94	3.94	3.94
1627	NASDAQ	ATRO	Mon, Oct 5, 1998	3.79	4.25	3.79	4.10
1626	NASDAQ	ATRO	Fri, Oct 2, 1998	4.15	4.15	4.15	4.15
1625	NASDAQ	ATRO	Thu, Oct 1, 1998	4.36	4.36	3.94	4.20
1624	NASDAQ	ATRO	Wed, Sep 30, 1998	3.74	4.00	3.74	4.00
1623	NASDAQ	ATRO	Tue, Sep 29, 1998	3.79	3.79	3.79	3.79
1622	NASDAQ	ATRO	Mon, Sep 28, 1998	3.84	3.84	3.74	3.76
1621	NASDAQ	ATRO	Fri, Sep 25, 1998	3.87	3.87	3.79	3.84
1620	NASDAQ	ATRO	Thu, Sep 24, 1998	4.00	4.00	3.87	3.89
1619	NASDAQ	ATRO	Wed, Sep 23, 1998	3.84	4.05	3.84	4.05
1618	NASDAQ	ATRO	Tue, Sep 22, 1998	3.81	3.83	3.81	3.83
1617	NASDAQ	ATRO	Mon, Sep 21, 1998	3.94	3.94	3.58	3.79
1616	NASDAQ	ATRO	Fri, Sep 18, 1998	3.89	3.94	3.89	3.94
1615	NASDAQ	ATRO	Wed, Sep 16, 1998	3.94	4.18	3.94	3.94
1614	NASDAQ	ATRO	Tue, Sep 15, 1998	4.05	4.05	3.94	3.94
1613	NASDAQ	ATRO	Mon, Sep 14, 1998	4.36	4.36	3.94	4.05
1612	NASDAQ	ATRO	Fri, Sep 11, 1998	3.94	3.97	3.94	3.97
1611	NASDAQ	ATRO	Thu, Sep 10, 1998	4.15	4.15	4.15	4.15
1610	NASDAQ	ATRO	Wed, Sep 9, 1998	4.51	4.51	4.46	4.46
1609	NASDAQ	ATRO	Tue, Sep 8, 1998	4.10	4.15	3.94	3.94
1608	NASDAQ	ATRO	Fri, Sep 4, 1998	3.89	3.94	3.74	3.84
1607	NASDAQ	ATRO	Thu, Sep 3, 1998	3.84	4.00	3.74	3.94
1606	NASDAQ	ATRO	Wed, Sep 2, 1998	4.31	4.31	3.94	4.00
1605	NASDAQ	ATRO	Tue, Sep 1, 1998	4.00	4.46	3.97	4.05
1604	NASDAQ	ATRO	Mon, Aug 31, 1998	4.15	4.15	3.84	4.05
1603	NASDAQ	ATRO	Fri, Aug 28, 1998	4.57	4.57	4.05	4.05
1602	NASDAQ	ATRO	Thu, Aug 27, 1998	4.20	4.36	4.05	4.20
1601	NASDAQ	ATRO	Wed, Aug 26, 1998	4.62	4.62	4.15	4.25
1600	NASDAQ	ATRO	Tue, Aug 25, 1998	4.57	4.77	4.36	4.36
1599	NASDAQ	ATRO	Mon, Aug 24, 1998	4.88	4.88	4.57	4.67
1598	NASDAQ	ATRO	Fri, Aug 21, 1998	4.88	4.88	4.57	4.67
1597	NASDAQ	ATRO	Thu, Aug 20, 1998	4.67	4.77	4.57	4.57
1596	NASDAQ	ATRO	Wed, Aug 19, 1998	4.98	4.98	4.67	4.67
1595	NASDAQ	ATRO	Tue, Aug 18, 1998	5.09	5.19	4.62	4.62
1594	NASDAQ	ATRO	Mon, Aug 17, 1998	4.98	4.98	4.77	4.93
1593	NASDAQ	ATRO	Fri, Aug 14, 1998	4.88	4.88	4.77	4.77
1592	NASDAQ	ATRO	Thu, Aug 13, 1998	5.29	5.29	4.98	4.98
1591	NASDAQ	ATRO	Wed, Aug 12, 1998	5.40	5.40	4.57	4.98
1590	NASDAQ	ATRO	Tue, Aug 11, 1998	5.19	5.19	4.57	4.88
1589	NASDAQ	ATRO	Mon, Aug 10, 1998	5.09	5.19	4.67	4.96
1588	NASDAQ	ATRO	Fri, Aug 7, 1998	4.15	4.15	4.00	4.15
1587	NASDAQ	ATRO	Thu, Aug 6, 1998	3.94	4.36	3.94	3.94
1586	NASDAQ	ATRO	Wed, Aug 5, 1998	3.94	4.36	3.89	4.15
1585	NASDAQ	ATRO	Tue, Aug 4, 1998	4.00	4.25	3.89	3.94
1584	NASDAQ	ATRO	Mon, Aug 3, 1998	4.57	4.57	4.46	4.46
1583	NASDAQ	ATRO	Fri, Jul 31, 1998	4.57	4.57	4.57	4.57
1582	NASDAQ	ATRO	Thu, Jul 30, 1998	4.83	4.83	4.46	4.77
1581	NASDAQ	ATRO	Wed, Jul 29, 1998	4.85	4.93	4.85	4.93
1580	NASDAQ	ATRO	Tue, Jul 28, 1998	5.09	5.09	4.98	4.98
1579	NASDAQ	ATRO	Mon, Jul 27, 1998	5.09	5.60	5.09	5.40
1578	NASDAQ	ATRO	Fri, Jul 24, 1998	5.19	5.24	5.19	5.24
1577	NASDAQ	ATRO	Thu, Jul 23, 1998	4.98	5.40	4.98	5.40
1576	NASDAQ	ATRO	Wed, Jul 22, 1998	5.19	5.19	5.09	5.09
1575	NASDAQ	ATRO	Tue, Jul 21, 1998	5.06	5.60	4.88	5.58
1574	NASDAQ	ATRO	Mon, Jul 20, 1998	5.09	5.34	5.09	5.34
1573	NASDAQ	ATRO	Fri, Jul 17, 1998	5.09	5.29	5.09	5.29
1572	NASDAQ	ATRO	Wed, Jul 15, 1998	5.29	5.29	5.09	5.09
1571	NASDAQ	ATRO	Tue, Jul 14, 1998	5.40	5.40	5.34	5.34
1570	NASDAQ	ATRO	Mon, Jul 13, 1998	5.40	5.40	5.40	5.40
1569	NASDAQ	ATRO	Fri, Jul 10, 1998	5.40	5.40	5.29	5.29
1568	NASDAQ	ATRO	Thu, Jul 9, 1998	5.50	5.50	5.24	5.29
1567	NASDAQ	ATRO	Wed, Jul 8, 1998	5.24	5.60	5.24	5.58
1566	NASDAQ	ATRO	Tue, Jul 7, 1998	5.19	5.45	4.98	5.24
1565	NASDAQ	ATRO	Mon, Jul 6, 1998	5.40	5.40	5.29	5.40
1564	NASDAQ	ATRO	Thu, Jul 2, 1998	5.29	5.71	5.29	5.45
1563	NASDAQ	ATRO	Wed, Jul 1, 1998	5.68	5.68	5.29	5.40
1562	NASDAQ	ATRO	Tue, Jun 30, 1998	6.02	6.07	5.19	5.71
1561	NASDAQ	ATRO	Mon, Jun 29, 1998	5.66	6.04	5.34	5.68
1560	NASDAQ	ATRO	Fri, Jun 26, 1998	5.19	5.50	5.09	5.50
1559	NASDAQ	ATRO	Thu, Jun 25, 1998	5.09	5.14	5.09	5.14
1558	NASDAQ	ATRO	Wed, Jun 24, 1998	4.98	5.14	4.98	5.14
1557	NASDAQ	ATRO	Tue, Jun 23, 1998	4.85	4.88	4.85	4.88
1556	NASDAQ	ATRO	Mon, Jun 22, 1998	5.16	5.16	4.88	4.93
1555	NASDAQ	ATRO	Fri, Jun 19, 1998	5.03	5.03	5.03	5.03
1554	NASDAQ	ATRO	Thu, Jun 18, 1998	4.88	5.14	4.88	5.03
1553	NASDAQ	ATRO	Wed, Jun 17, 1998	4.98	4.98	4.88	4.90
1552	NASDAQ	ATRO	Tue, Jun 16, 1998	5.03	5.14	5.03	5.09
1551	NASDAQ	ATRO	Mon, Jun 15, 1998	5.03	5.18	5.03	5.09
1550	NASDAQ	ATRO	Fri, Jun 12, 1998	5.19	5.19	4.88	4.98
1549	NASDAQ	ATRO	Thu, Jun 11, 1998	5.34	5.34	5.09	5.19
1548	NASDAQ	ATRO	Wed, Jun 10, 1998	5.19	5.19	5.19	5.19
1547	NASDAQ	ATRO	Tue, Jun 9, 1998	5.09	5.19	5.09	5.19
1546	NASDAQ	ATRO	Mon, Jun 8, 1998	5.19	5.29	5.19	5.24
1545	NASDAQ	ATRO	Fri, Jun 5, 1998	4.98	5.09	4.98	5.09
1544	NASDAQ	ATRO	Thu, Jun 4, 1998	5.14	5.14	5.09	5.09
1543	NASDAQ	ATRO	Wed, Jun 3, 1998	4.98	5.14	4.98	5.03
1542	NASDAQ	ATRO	Tue, Jun 2, 1998	5.09	5.09	4.98	4.98
1541	NASDAQ	ATRO	Mon, Jun 1, 1998	5.09	5.19	5.01	5.19
1540	NASDAQ	ATRO	Fri, May 29, 1998	4.83	4.98	4.83	4.98
1539	NASDAQ	ATRO	Thu, May 28, 1998	4.98	4.98	4.98	4.98
1538	NASDAQ	ATRO	Wed, May 27, 1998	5.14	5.34	5.03	5.03
1537	NASDAQ	ATRO	Tue, May 26, 1998	5.19	5.24	5.14	5.14
1536	NASDAQ	ATRO	Fri, May 22, 1998	5.14	5.19	5.14	5.19
1535	NASDAQ	ATRO	Thu, May 21, 1998	5.34	5.40	5.03	5.24
1534	NASDAQ	ATRO	Wed, May 20, 1998	5.40	5.40	5.24	5.37
1533	NASDAQ	ATRO	Tue, May 19, 1998	5.03	5.34	5.03	5.34
1532	NASDAQ	ATRO	Mon, May 18, 1998	4.88	5.16	4.88	5.03
1531	NASDAQ	ATRO	Fri, May 15, 1998	4.98	5.14	4.83	4.98
1530	NASDAQ	ATRO	Thu, May 14, 1998	4.98	5.19	4.93	4.93
1529	NASDAQ	ATRO	Wed, May 13, 1998	4.98	5.19	4.98	5.19
1528	NASDAQ	ATRO	Tue, May 12, 1998	4.88	5.21	4.88	4.98
1527	NASDAQ	ATRO	Mon, May 11, 1998	5.40	5.40	4.98	5.16
1526	NASDAQ	ATRO	Fri, May 8, 1998	5.19	5.29	5.09	5.09
1525	NASDAQ	ATRO	Thu, May 7, 1998	4.77	5.19	4.77	4.98
1524	NASDAQ	ATRO	Wed, May 6, 1998	4.77	4.98	4.77	4.98
1523	NASDAQ	ATRO	Tue, May 5, 1998	4.93	5.19	4.83	5.14
1522	NASDAQ	ATRO	Mon, May 4, 1998	4.77	5.19	4.77	4.93
1521	NASDAQ	ATRO	Fri, May 1, 1998	4.93	5.24	4.72	4.88
1520	NASDAQ	ATRO	Thu, Apr 30, 1998	5.71	5.71	4.88	4.93
1519	NASDAQ	ATRO	Wed, Apr 29, 1998	5.66	5.66	5.29	5.34
1518	NASDAQ	ATRO	Tue, Apr 28, 1998	5.71	5.76	5.24	5.45
1517	NASDAQ	ATRO	Mon, Apr 27, 1998	5.81	5.92	4.77	5.14
1516	NASDAQ	ATRO	Fri, Apr 24, 1998	4.51	5.09	3.94	4.93
1515	NASDAQ	ATRO	Thu, Apr 23, 1998	3.89	4.15	3.89	4.15
1514	NASDAQ	ATRO	Wed, Apr 22, 1998	4.41	4.41	4.15	4.25
1513	NASDAQ	ATRO	Tue, Apr 21, 1998	3.71	4.57	3.71	4.02
1512	NASDAQ	ATRO	Mon, Apr 20, 1998	3.63	3.63	3.53	3.53
1511	NASDAQ	ATRO	Fri, Apr 17, 1998	3.68	3.68	3.53	3.53
1510	NASDAQ	ATRO	Thu, Apr 16, 1998	3.63	3.63	3.63	3.63
1509	NASDAQ	ATRO	Wed, Apr 15, 1998	3.58	3.68	3.58	3.63
1508	NASDAQ	ATRO	Tue, Apr 14, 1998	3.58	3.68	3.58	3.68
1507	NASDAQ	ATRO	Mon, Apr 13, 1998	3.53	3.68	3.53	3.55
1506	NASDAQ	ATRO	Thu, Apr 9, 1998	3.53	3.58	3.53	3.53
1505	NASDAQ	ATRO	Wed, Apr 8, 1998	3.68	3.68	3.53	3.53
1504	NASDAQ	ATRO	Tue, Apr 7, 1998	3.63	3.71	3.53	3.58
1503	NASDAQ	ATRO	Mon, Apr 6, 1998	3.53	3.53	3.53	3.53
1502	NASDAQ	ATRO	Fri, Apr 3, 1998	3.45	3.45	3.45	3.45
1501	NASDAQ	ATRO	Thu, Apr 2, 1998	3.58	3.58	3.45	3.45
1500	NASDAQ	ATRO	Wed, Apr 1, 1998	3.68	3.68	3.53	3.53
1499	NASDAQ	ATRO	Tue, Mar 31, 1998	3.48	3.58	3.42	3.58
1498	NASDAQ	ATRO	Mon, Mar 30, 1998	3.48	3.48	3.48	3.48
1497	NASDAQ	ATRO	Fri, Mar 27, 1998	3.68	3.74	3.53	3.53
1496	NASDAQ	ATRO	Thu, Mar 26, 1998	3.53	3.53	3.53	3.53
1495	NASDAQ	ATRO	Wed, Mar 25, 1998	3.63	3.68	3.48	3.53
1494	NASDAQ	ATRO	Tue, Mar 24, 1998	3.53	3.63	3.22	3.63
1493	NASDAQ	ATRO	Mon, Mar 23, 1998	3.63	3.63	3.53	3.53
1492	NASDAQ	ATRO	Fri, Mar 20, 1998	3.63	3.63	3.63	3.63
1491	NASDAQ	ATRO	Thu, Mar 19, 1998	3.53	3.74	3.53	3.74
1490	NASDAQ	ATRO	Wed, Mar 18, 1998	3.68	3.68	3.68	3.68
1489	NASDAQ	ATRO	Tue, Mar 17, 1998	3.63	3.74	3.42	3.74
1488	NASDAQ	ATRO	Mon, Mar 16, 1998	3.42	3.58	3.32	3.53
1487	NASDAQ	ATRO	Fri, Mar 13, 1998	3.53	3.53	3.53	3.53
1486	NASDAQ	ATRO	Thu, Mar 12, 1998	3.42	3.53	3.40	3.53
1485	NASDAQ	ATRO	Wed, Mar 11, 1998	3.45	3.68	3.45	3.48
1484	NASDAQ	ATRO	Tue, Mar 10, 1998	3.48	3.58	3.48	3.58
1483	NASDAQ	ATRO	Mon, Mar 9, 1998	3.53	3.53	3.42	3.53
1482	NASDAQ	ATRO	Fri, Mar 6, 1998	3.63	3.63	3.55	3.55
1481	NASDAQ	ATRO	Thu, Mar 5, 1998	3.71	3.74	3.48	3.74
1480	NASDAQ	ATRO	Wed, Mar 4, 1998	3.63	3.74	3.58	3.58
1479	NASDAQ	ATRO	Tue, Mar 3, 1998	3.53	3.68	3.42	3.53
1478	NASDAQ	ATRO	Mon, Mar 2, 1998	3.74	3.74	3.58	3.58
1477	NASDAQ	ATRO	Fri, Feb 27, 1998	3.32	3.68	3.32	3.68
1476	NASDAQ	ATRO	Wed, Feb 25, 1998	3.42	3.48	3.42	3.42
1475	NASDAQ	ATRO	Tue, Feb 24, 1998	3.32	3.42	3.32	3.42
1474	NASDAQ	ATRO	Mon, Feb 23, 1998	3.27	3.48	3.27	3.32
1473	NASDAQ	ATRO	Fri, Feb 20, 1998	3.53	3.53	3.27	3.35
1472	NASDAQ	ATRO	Thu, Feb 19, 1998	3.58	3.58	3.17	3.37
1471	NASDAQ	ATRO	Wed, Feb 18, 1998	3.27	3.27	3.27	3.27
1470	NASDAQ	ATRO	Tue, Feb 17, 1998	3.32	3.53	3.32	3.53
1469	NASDAQ	ATRO	Fri, Feb 13, 1998	3.42	3.42	3.27	3.27
1468	NASDAQ	ATRO	Thu, Feb 12, 1998	3.32	3.53	3.32	3.53
1467	NASDAQ	ATRO	Wed, Feb 11, 1998	3.37	3.37	3.37	3.37
1466	NASDAQ	ATRO	Tue, Feb 10, 1998	3.42	3.53	3.42	3.53
1465	NASDAQ	ATRO	Mon, Feb 9, 1998	3.42	3.53	3.42	3.42
1464	NASDAQ	ATRO	Fri, Feb 6, 1998	3.68	3.68	3.53	3.58
1463	NASDAQ	ATRO	Thu, Feb 5, 1998	3.29	3.68	3.29	3.53
1462	NASDAQ	ATRO	Wed, Feb 4, 1998	3.63	3.63	3.17	3.32
1461	NASDAQ	ATRO	Tue, Feb 3, 1998	3.27	3.42	3.27	3.27
1460	NASDAQ	ATRO	Mon, Feb 2, 1998	3.32	3.63	3.27	3.32
1459	NASDAQ	ATRO	Fri, Jan 30, 1998	3.53	3.53	3.32	3.42
1458	NASDAQ	ATRO	Thu, Jan 29, 1998	3.53	3.68	3.42	3.68
1457	NASDAQ	ATRO	Wed, Jan 28, 1998	3.68	3.71	3.53	3.53
1456	NASDAQ	ATRO	Tue, Jan 27, 1998	3.74	3.74	3.53	3.68
1455	NASDAQ	ATRO	Mon, Jan 26, 1998	3.74	3.74	3.48	3.53
1454	NASDAQ	ATRO	Fri, Jan 23, 1998	3.74	3.74	3.74	3.74
1453	NASDAQ	ATRO	Thu, Jan 22, 1998	3.84	4.00	3.53	3.53
1452	NASDAQ	ATRO	Wed, Jan 21, 1998	3.74	3.74	3.63	3.74
1451	NASDAQ	ATRO	Tue, Jan 20, 1998	3.58	3.74	3.58	3.74
1450	NASDAQ	ATRO	Fri, Jan 16, 1998	3.74	3.74	3.53	3.74
1449	NASDAQ	ATRO	Thu, Jan 15, 1998	3.58	3.74	3.58	3.58
1448	NASDAQ	ATRO	Wed, Jan 14, 1998	3.53	3.71	3.53	3.63
1447	NASDAQ	ATRO	Tue, Jan 13, 1998	3.63	3.74	3.63	3.68
1446	NASDAQ	ATRO	Mon, Jan 12, 1998	3.48	3.74	3.48	3.74
1445	NASDAQ	ATRO	Fri, Jan 9, 1998	3.53	3.74	3.37	3.74
1444	NASDAQ	ATRO	Thu, Jan 8, 1998	3.53	3.74	3.53	3.74
1443	NASDAQ	ATRO	Wed, Jan 7, 1998	3.74	3.94	3.74	3.94
1442	NASDAQ	ATRO	Tue, Jan 6, 1998	3.94	3.94	3.94	3.94
1441	NASDAQ	ATRO	Mon, Jan 5, 1998	3.84	4.05	3.74	3.89
1440	NASDAQ	ATRO	Fri, Jan 2, 1998	4.05	4.05	4.05	4.05
1439	NASDAQ	ATRO	Wed, Dec 31, 1997	3.74	3.94	3.68	3.94
1438	NASDAQ	ATRO	Tue, Dec 30, 1997	3.84	4.05	3.84	3.84
1437	NASDAQ	ATRO	Mon, Dec 29, 1997	3.48	3.63	3.48	3.63
1436	NASDAQ	ATRO	Fri, Dec 26, 1997	3.48	3.53	3.48	3.53
1435	NASDAQ	ATRO	Wed, Dec 24, 1997	3.40	3.53	3.40	3.50
1434	NASDAQ	ATRO	Tue, Dec 23, 1997	3.66	3.66	3.32	3.63
1433	NASDAQ	ATRO	Mon, Dec 22, 1997	3.63	3.63	3.63	3.63
1432	NASDAQ	ATRO	Fri, Dec 19, 1997	3.63	3.68	3.63	3.68
1431	NASDAQ	ATRO	Thu, Dec 18, 1997	3.68	3.68	3.63	3.63
1430	NASDAQ	ATRO	Wed, Dec 17, 1997	3.74	3.94	3.74	3.74
1429	NASDAQ	ATRO	Tue, Dec 16, 1997	4.15	4.15	3.94	3.94
1428	NASDAQ	ATRO	Mon, Dec 15, 1997	3.84	3.84	3.84	3.84
1427	NASDAQ	ATRO	Fri, Dec 12, 1997	3.79	4.05	3.79	4.05
1426	NASDAQ	ATRO	Thu, Dec 11, 1997	3.94	3.94	3.79	3.79
1425	NASDAQ	ATRO	Wed, Dec 10, 1997	3.84	4.05	3.84	4.05
1424	NASDAQ	ATRO	Tue, Dec 9, 1997	4.05	4.05	3.84	3.84
1423	NASDAQ	ATRO	Mon, Dec 8, 1997	3.84	3.84	3.84	3.84
1422	NASDAQ	ATRO	Fri, Dec 5, 1997	3.68	4.05	3.68	3.84
1421	NASDAQ	ATRO	Thu, Dec 4, 1997	4.15	4.15	4.05	4.10
1420	NASDAQ	ATRO	Wed, Dec 3, 1997	3.79	4.15	3.79	4.15
1419	NASDAQ	ATRO	Tue, Dec 2, 1997	3.74	3.79	3.63	3.79
1418	NASDAQ	ATRO	Mon, Dec 1, 1997	3.74	3.74	3.74	3.74
1417	NASDAQ	ATRO	Fri, Nov 28, 1997	3.74	3.74	3.74	3.74
1416	NASDAQ	ATRO	Wed, Nov 26, 1997	4.05	4.05	4.05	4.05
1415	NASDAQ	ATRO	Tue, Nov 25, 1997	3.74	4.10	3.63	4.10
1414	NASDAQ	ATRO	Mon, Nov 24, 1997	3.94	3.94	3.74	3.84
1413	NASDAQ	ATRO	Fri, Nov 21, 1997	3.94	3.94	3.94	3.94
1412	NASDAQ	ATRO	Thu, Nov 20, 1997	4.05	4.05	4.00	4.00
1411	NASDAQ	ATRO	Wed, Nov 19, 1997	4.00	4.10	4.00	4.10
1410	NASDAQ	ATRO	Tue, Nov 18, 1997	4.33	4.33	4.33	4.33
1409	NASDAQ	ATRO	Mon, Nov 17, 1997	4.25	4.25	4.05	4.05
1408	NASDAQ	ATRO	Fri, Nov 14, 1997	4.05	4.05	4.05	4.05
1407	NASDAQ	ATRO	Thu, Nov 13, 1997	4.25	4.25	4.25	4.25
1406	NASDAQ	ATRO	Wed, Nov 12, 1997	4.00	4.02	3.94	3.94
1405	NASDAQ	ATRO	Tue, Nov 11, 1997	4.00	4.15	4.00	4.05
1404	NASDAQ	ATRO	Mon, Nov 10, 1997	4.00	4.38	4.00	4.05
1403	NASDAQ	ATRO	Fri, Nov 7, 1997	4.31	4.31	4.15	4.15
1402	NASDAQ	ATRO	Thu, Nov 6, 1997	4.10	4.51	4.10	4.51
1401	NASDAQ	ATRO	Wed, Nov 5, 1997	4.31	4.51	4.31	4.46
1400	NASDAQ	ATRO	Tue, Nov 4, 1997	4.31	4.41	4.31	4.41
1399	NASDAQ	ATRO	Mon, Nov 3, 1997	4.02	4.31	3.94	4.31
1398	NASDAQ	ATRO	Fri, Oct 31, 1997	4.25	4.31	4.00	4.00
1397	NASDAQ	ATRO	Thu, Oct 30, 1997	3.89	4.05	3.84	4.05
1396	NASDAQ	ATRO	Wed, Oct 29, 1997	4.00	4.41	4.00	4.05
1395	NASDAQ	ATRO	Tue, Oct 28, 1997	3.94	4.36	3.84	4.00
1394	NASDAQ	ATRO	Mon, Oct 27, 1997	4.25	4.57	4.05	4.15
1393	NASDAQ	ATRO	Fri, Oct 24, 1997	4.72	4.72	4.25	4.25
1392	NASDAQ	ATRO	Thu, Oct 23, 1997	4.10	4.46	4.05	4.36
1391	NASDAQ	ATRO	Wed, Oct 22, 1997	4.77	4.77	4.20	4.51
1390	NASDAQ	ATRO	Tue, Oct 21, 1997	4.36	4.72	4.36	4.51
1389	NASDAQ	ATRO	Mon, Oct 20, 1997	4.31	4.67	4.05	4.67
1388	NASDAQ	ATRO	Fri, Oct 17, 1997	4.25	4.31	3.74	4.05
1387	NASDAQ	ATRO	Thu, Oct 16, 1997	4.36	4.67	4.36	4.36
1386	NASDAQ	ATRO	Wed, Oct 15, 1997	4.93	4.93	4.15	4.36
1385	NASDAQ	ATRO	Tue, Oct 14, 1997	4.98	5.19	4.88	4.98
1384	NASDAQ	ATRO	Mon, Oct 13, 1997	4.98	5.19	4.83	4.88
1383	NASDAQ	ATRO	Fri, Oct 10, 1997	4.51	4.98	4.51	4.88
1382	NASDAQ	ATRO	Thu, Oct 9, 1997	4.51	4.51	4.51	4.51
1381	NASDAQ	ATRO	Wed, Oct 8, 1997	4.62	4.88	4.31	4.72
1380	NASDAQ	ATRO	Tue, Oct 7, 1997	4.77	4.98	4.57	4.77
1379	NASDAQ	ATRO	Mon, Oct 6, 1997	4.67	4.88	4.51	4.77
1378	NASDAQ	ATRO	Fri, Oct 3, 1997	3.94	4.67	3.94	4.62
1377	NASDAQ	ATRO	Thu, Oct 2, 1997	4.00	4.00	3.84	3.97
1376	NASDAQ	ATRO	Wed, Oct 1, 1997	4.05	4.05	3.76	4.05
1375	NASDAQ	ATRO	Tue, Sep 30, 1997	4.00	4.15	3.68	3.71
1374	NASDAQ	ATRO	Mon, Sep 29, 1997	3.37	3.89	3.37	3.89
1373	NASDAQ	ATRO	Fri, Sep 26, 1997	3.45	3.53	3.45	3.48
1372	NASDAQ	ATRO	Thu, Sep 25, 1997	3.42	3.42	3.42	3.42
1371	NASDAQ	ATRO	Wed, Sep 24, 1997	3.37	3.42	3.37	3.37
1370	NASDAQ	ATRO	Tue, Sep 23, 1997	3.48	3.48	3.37	3.40
1369	NASDAQ	ATRO	Mon, Sep 22, 1997	3.11	3.48	3.11	3.37
1368	NASDAQ	ATRO	Fri, Sep 19, 1997	3.06	3.27	3.06	3.22
1367	NASDAQ	ATRO	Thu, Sep 18, 1997	3.19	3.32	3.17	3.17
1366	NASDAQ	ATRO	Wed, Sep 17, 1997	3.22	3.42	3.22	3.32
1365	NASDAQ	ATRO	Tue, Sep 16, 1997	3.27	3.32	3.06	3.22
1364	NASDAQ	ATRO	Fri, Sep 12, 1997	3.11	3.11	3.11	3.11
1363	NASDAQ	ATRO	Thu, Sep 11, 1997	3.17	3.17	3.17	3.17
1362	NASDAQ	ATRO	Wed, Sep 10, 1997	3.27	3.27	3.17	3.17
1361	NASDAQ	ATRO	Tue, Sep 9, 1997	2.98	3.22	2.98	3.22
1360	NASDAQ	ATRO	Fri, Sep 5, 1997	2.98	3.01	2.98	3.01
1359	NASDAQ	ATRO	Thu, Sep 4, 1997	3.17	3.22	2.98	3.01
1358	NASDAQ	ATRO	Wed, Sep 3, 1997	2.85	2.85	2.85	2.85
1357	NASDAQ	ATRO	Tue, Sep 2, 1997	3.11	3.14	2.91	3.06
1356	NASDAQ	ATRO	Fri, Aug 29, 1997	2.85	3.11	2.85	3.11
1355	NASDAQ	ATRO	Thu, Aug 28, 1997	3.22	3.22	2.88	3.14
1354	NASDAQ	ATRO	Wed, Aug 27, 1997	3.19	3.19	3.19	3.19
1353	NASDAQ	ATRO	Tue, Aug 26, 1997	3.19	3.19	2.96	3.17
1352	NASDAQ	ATRO	Fri, Aug 22, 1997	2.96	3.19	2.96	3.19
1351	NASDAQ	ATRO	Thu, Aug 21, 1997	3.27	3.27	2.91	3.19
1350	NASDAQ	ATRO	Wed, Aug 20, 1997	3.37	3.37	3.27	3.27
1349	NASDAQ	ATRO	Tue, Aug 19, 1997	3.27	3.32	3.27	3.32
1348	NASDAQ	ATRO	Mon, Aug 18, 1997	3.32	3.42	3.27	3.27
1347	NASDAQ	ATRO	Fri, Aug 15, 1997	3.17	3.32	3.17	3.29
1346	NASDAQ	ATRO	Thu, Aug 14, 1997	3.22	3.32	3.17	3.22
1345	NASDAQ	ATRO	Wed, Aug 13, 1997	3.22	3.27	3.17	3.27
1344	NASDAQ	ATRO	Tue, Aug 12, 1997	3.22	3.22	3.11	3.17
1343	NASDAQ	ATRO	Mon, Aug 11, 1997	3.32	3.32	3.11	3.22
1342	NASDAQ	ATRO	Fri, Aug 8, 1997	3.11	3.27	3.11	3.22
1341	NASDAQ	ATRO	Thu, Aug 7, 1997	3.01	3.32	3.01	3.22
1340	NASDAQ	ATRO	Wed, Aug 6, 1997	2.96	3.11	2.96	3.11
1339	NASDAQ	ATRO	Tue, Aug 5, 1997	2.91	3.14	2.91	3.06
1338	NASDAQ	ATRO	Mon, Aug 4, 1997	2.91	2.98	2.91	2.98
1337	NASDAQ	ATRO	Fri, Aug 1, 1997	3.06	3.06	2.80	2.98
1336	NASDAQ	ATRO	Thu, Jul 31, 1997	2.80	3.17	2.75	3.01
1335	NASDAQ	ATRO	Wed, Jul 30, 1997	2.85	2.88	2.75	2.88
1334	NASDAQ	ATRO	Tue, Jul 29, 1997	2.85	2.85	2.72	2.75
1333	NASDAQ	ATRO	Mon, Jul 28, 1997	2.91	2.91	2.75	2.85
1332	NASDAQ	ATRO	Fri, Jul 25, 1997	2.72	2.91	2.72	2.80
1331	NASDAQ	ATRO	Thu, Jul 24, 1997	2.85	2.85	2.72	2.72
1330	NASDAQ	ATRO	Wed, Jul 23, 1997	2.72	2.85	2.72	2.85
1329	NASDAQ	ATRO	Tue, Jul 22, 1997	2.67	2.80	2.67	2.72
1328	NASDAQ	ATRO	Mon, Jul 21, 1997	2.80	2.80	2.65	2.67
1327	NASDAQ	ATRO	Fri, Jul 18, 1997	2.70	2.70	2.65	2.67
1326	NASDAQ	ATRO	Thu, Jul 17, 1997	2.70	2.80	2.70	2.70
1325	NASDAQ	ATRO	Wed, Jul 16, 1997	2.65	2.80	2.65	2.80
1324	NASDAQ	ATRO	Tue, Jul 15, 1997	2.80	2.80	2.65	2.67
1323	NASDAQ	ATRO	Mon, Jul 14, 1997	2.80	2.80	2.65	2.70
1322	NASDAQ	ATRO	Fri, Jul 11, 1997	2.65	2.80	2.65	2.80
1321	NASDAQ	ATRO	Thu, Jul 10, 1997	2.65	2.70	2.65	2.67
1320	NASDAQ	ATRO	Wed, Jul 9, 1997	2.65	2.65	2.65	2.65
1319	NASDAQ	ATRO	Tue, Jul 8, 1997	2.65	2.70	2.65	2.65
1318	NASDAQ	ATRO	Mon, Jul 7, 1997	2.65	2.70	2.65	2.65
1317	NASDAQ	ATRO	Thu, Jul 3, 1997	2.75	2.80	2.70	2.70
1316	NASDAQ	ATRO	Wed, Jul 2, 1997	2.65	2.75	2.65	2.75
1315	NASDAQ	ATRO	Tue, Jul 1, 1997	2.67	2.70	2.67	2.70
1314	NASDAQ	ATRO	Mon, Jun 30, 1997	2.59	2.65	2.59	2.62
1313	NASDAQ	ATRO	Fri, Jun 27, 1997	2.59	2.62	2.59	2.62
1312	NASDAQ	ATRO	Thu, Jun 26, 1997	2.65	2.70	2.65	2.70
1311	NASDAQ	ATRO	Wed, Jun 25, 1997	2.75	2.75	2.65	2.65
1310	NASDAQ	ATRO	Tue, Jun 24, 1997	2.65	2.72	2.59	2.67
1309	NASDAQ	ATRO	Mon, Jun 23, 1997	2.59	2.70	2.59	2.65
1308	NASDAQ	ATRO	Fri, Jun 20, 1997	2.65	2.72	2.59	2.59
1307	NASDAQ	ATRO	Thu, Jun 19, 1997	2.67	2.67	2.59	2.59
1306	NASDAQ	ATRO	Wed, Jun 18, 1997	2.59	2.67	2.59	2.62
1305	NASDAQ	ATRO	Tue, Jun 17, 1997	2.70	2.70	2.59	2.62
1304	NASDAQ	ATRO	Mon, Jun 16, 1997	2.59	2.62	2.59	2.59
1303	NASDAQ	ATRO	Fri, Jun 13, 1997	2.75	2.75	2.59	2.59
1302	NASDAQ	ATRO	Thu, Jun 12, 1997	2.65	2.67	2.59	2.59
1301	NASDAQ	ATRO	Wed, Jun 11, 1997	2.75	2.75	2.65	2.75
1300	NASDAQ	ATRO	Tue, Jun 10, 1997	2.59	2.75	2.59	2.62
1299	NASDAQ	ATRO	Mon, Jun 9, 1997	2.59	2.62	2.59	2.62
1298	NASDAQ	ATRO	Fri, Jun 6, 1997	2.59	2.65	2.59	2.62
1297	NASDAQ	ATRO	Thu, Jun 5, 1997	2.59	2.62	2.59	2.62
1296	NASDAQ	ATRO	Wed, Jun 4, 1997	2.75	2.75	2.59	2.59
1295	NASDAQ	ATRO	Tue, Jun 3, 1997	2.75	2.75	2.59	2.62
1294	NASDAQ	ATRO	Mon, Jun 2, 1997	2.75	2.75	2.59	2.62
1293	NASDAQ	ATRO	Fri, May 30, 1997	2.75	2.75	2.59	2.65
1292	NASDAQ	ATRO	Thu, May 29, 1997	2.80	2.80	2.65	2.70
1291	NASDAQ	ATRO	Wed, May 28, 1997	2.65	2.75	2.65	2.65
1290	NASDAQ	ATRO	Tue, May 27, 1997	2.70	2.80	2.59	2.65
1289	NASDAQ	ATRO	Fri, May 23, 1997	2.70	2.70	2.59	2.70
1288	NASDAQ	ATRO	Thu, May 22, 1997	2.70	2.70	2.59	2.70
1287	NASDAQ	ATRO	Wed, May 21, 1997	2.59	2.59	2.59	2.59
1286	NASDAQ	ATRO	Tue, May 20, 1997	2.59	2.65	2.59	2.59
1285	NASDAQ	ATRO	Mon, May 19, 1997	2.59	2.70	2.59	2.70
1284	NASDAQ	ATRO	Fri, May 16, 1997	2.59	2.62	2.59	2.62
1283	NASDAQ	ATRO	Thu, May 15, 1997	2.59	2.59	2.59	2.59
1282	NASDAQ	ATRO	Wed, May 14, 1997	2.67	2.67	2.59	2.59
1281	NASDAQ	ATRO	Tue, May 13, 1997	2.59	2.62	2.59	2.62
1280	NASDAQ	ATRO	Mon, May 12, 1997	2.70	2.70	2.59	2.59
1279	NASDAQ	ATRO	Fri, May 9, 1997	2.59	2.70	2.59	2.70
1278	NASDAQ	ATRO	Thu, May 8, 1997	2.70	2.70	2.59	2.59
1277	NASDAQ	ATRO	Wed, May 7, 1997	2.59	2.59	2.59	2.59
1276	NASDAQ	ATRO	Tue, May 6, 1997	2.59	2.65	2.59	2.65
1275	NASDAQ	ATRO	Mon, May 5, 1997	2.59	2.75	2.59	2.59
1274	NASDAQ	ATRO	Fri, May 2, 1997	2.75	2.75	2.59	2.59
1273	NASDAQ	ATRO	Thu, May 1, 1997	2.67	2.75	2.59	2.59
1272	NASDAQ	ATRO	Wed, Apr 30, 1997	2.54	2.67	2.54	2.67
1271	NASDAQ	ATRO	Tue, Apr 29, 1997	2.59	2.59	2.54	2.54
1270	NASDAQ	ATRO	Mon, Apr 28, 1997	2.59	2.59	2.59	2.59
1269	NASDAQ	ATRO	Fri, Apr 25, 1997	2.59	2.75	2.59	2.59
1268	NASDAQ	ATRO	Thu, Apr 24, 1997	2.62	2.75	2.62	2.65
1267	NASDAQ	ATRO	Wed, Apr 23, 1997	2.54	2.65	2.54	2.65
1266	NASDAQ	ATRO	Tue, Apr 22, 1997	2.59	2.65	2.59	2.65
1265	NASDAQ	ATRO	Mon, Apr 21, 1997	2.65	2.65	2.54	2.65
1264	NASDAQ	ATRO	Fri, Apr 18, 1997	2.55	2.65	2.54	2.59
1263	NASDAQ	ATRO	Thu, Apr 17, 1997	2.59	2.70	2.54	2.70
1262	NASDAQ	ATRO	Tue, Apr 15, 1997	2.70	2.70	2.54	2.54
1261	NASDAQ	ATRO	Mon, Apr 14, 1997	2.54	2.70	2.54	2.65
1260	NASDAQ	ATRO	Fri, Apr 11, 1997	2.59	2.59	2.54	2.54
1259	NASDAQ	ATRO	Thu, Apr 10, 1997	2.54	2.70	2.54	2.57
1258	NASDAQ	ATRO	Wed, Apr 9, 1997	2.70	2.70	2.70	2.70
1257	NASDAQ	ATRO	Tue, Apr 8, 1997	2.54	2.70	2.54	2.54
1256	NASDAQ	ATRO	Mon, Apr 7, 1997	2.54	2.57	2.54	2.57
1255	NASDAQ	ATRO	Fri, Apr 4, 1997	2.54	2.54	2.54	2.54
1254	NASDAQ	ATRO	Thu, Apr 3, 1997	2.54	2.65	2.54	2.54
1253	NASDAQ	ATRO	Wed, Apr 2, 1997	2.70	2.70	2.54	2.54
1252	NASDAQ	ATRO	Tue, Apr 1, 1997	2.54	2.70	2.54	2.54
1251	NASDAQ	ATRO	Mon, Mar 31, 1997	2.59	2.59	2.54	2.54
1250	NASDAQ	ATRO	Wed, Mar 26, 1997	2.54	2.59	2.54	2.59
1249	NASDAQ	ATRO	Tue, Mar 25, 1997	2.54	2.65	2.54	2.65
1248	NASDAQ	ATRO	Mon, Mar 24, 1997	2.54	2.65	2.54	2.57
1247	NASDAQ	ATRO	Fri, Mar 21, 1997	2.54	2.59	2.54	2.54
1246	NASDAQ	ATRO	Thu, Mar 20, 1997	2.70	2.70	2.54	2.57
1245	NASDAQ	ATRO	Wed, Mar 19, 1997	2.54	2.57	2.54	2.57
1244	NASDAQ	ATRO	Tue, Mar 18, 1997	2.70	2.70	2.54	2.54
1243	NASDAQ	ATRO	Mon, Mar 17, 1997	2.75	2.75	2.54	2.59
1242	NASDAQ	ATRO	Fri, Mar 14, 1997	2.75	2.75	2.59	2.59
1241	NASDAQ	ATRO	Thu, Mar 13, 1997	2.54	2.75	2.54	2.54
1240	NASDAQ	ATRO	Wed, Mar 12, 1997	2.59	2.62	2.54	2.59
1239	NASDAQ	ATRO	Tue, Mar 11, 1997	2.54	2.62	2.54	2.54
1238	NASDAQ	ATRO	Mon, Mar 10, 1997	2.59	2.59	2.54	2.54
1237	NASDAQ	ATRO	Fri, Mar 7, 1997	2.54	2.75	2.54	2.75
1236	NASDAQ	ATRO	Thu, Mar 6, 1997	2.59	2.65	2.59	2.65
1235	NASDAQ	ATRO	Wed, Mar 5, 1997	2.70	2.75	2.54	2.70
1234	NASDAQ	ATRO	Tue, Mar 4, 1997	2.54	2.75	2.54	2.59
1233	NASDAQ	ATRO	Mon, Mar 3, 1997	2.54	2.75	2.54	2.54
1232	NASDAQ	ATRO	Fri, Feb 28, 1997	2.54	2.75	2.54	2.59
1231	NASDAQ	ATRO	Thu, Feb 27, 1997	2.54	2.75	2.54	2.75
1230	NASDAQ	ATRO	Wed, Feb 26, 1997	2.54	2.70	2.54	2.54
1229	NASDAQ	ATRO	Tue, Feb 25, 1997	2.54	2.75	2.54	2.54
1228	NASDAQ	ATRO	Mon, Feb 24, 1997	2.54	2.75	2.54	2.65
1227	NASDAQ	ATRO	Fri, Feb 21, 1997	2.75	2.75	2.54	2.65
1226	NASDAQ	ATRO	Thu, Feb 20, 1997	2.59	2.75	2.54	2.54
1225	NASDAQ	ATRO	Wed, Feb 19, 1997	2.54	2.75	2.54	2.59
1224	NASDAQ	ATRO	Tue, Feb 18, 1997	2.65	2.85	2.54	2.54
1223	NASDAQ	ATRO	Fri, Feb 14, 1997	2.65	2.85	2.65	2.65
1222	NASDAQ	ATRO	Thu, Feb 13, 1997	2.85	2.85	2.65	2.65
1221	NASDAQ	ATRO	Wed, Feb 12, 1997	2.70	2.80	2.65	2.70
1220	NASDAQ	ATRO	Tue, Feb 11, 1997	2.59	2.75	2.59	2.75
1219	NASDAQ	ATRO	Mon, Feb 10, 1997	2.75	2.75	2.59	2.70
1218	NASDAQ	ATRO	Fri, Feb 7, 1997	2.75	2.75	2.65	2.65
1217	NASDAQ	ATRO	Thu, Feb 6, 1997	2.75	2.75	2.75	2.75
1216	NASDAQ	ATRO	Wed, Feb 5, 1997	2.70	2.85	2.60	2.70
1215	NASDAQ	ATRO	Tue, Feb 4, 1997	2.70	2.70	2.59	2.59
1214	NASDAQ	ATRO	Mon, Feb 3, 1997	2.70	2.70	2.54	2.70
1213	NASDAQ	ATRO	Fri, Jan 31, 1997	2.65	2.65	2.49	2.59
1212	NASDAQ	ATRO	Thu, Jan 30, 1997	2.80	2.80	2.62	2.70
1211	NASDAQ	ATRO	Wed, Jan 29, 1997	2.85	2.85	2.59	2.65
1210	NASDAQ	ATRO	Tue, Jan 28, 1997	2.96	2.96	2.65	2.80
1209	NASDAQ	ATRO	Mon, Jan 27, 1997	2.96	2.96	2.80	2.80
1208	NASDAQ	ATRO	Fri, Jan 24, 1997	2.96	2.96	2.80	2.91
1207	NASDAQ	ATRO	Thu, Jan 23, 1997	2.96	2.96	2.75	2.91
1206	NASDAQ	ATRO	Wed, Jan 22, 1997	2.70	2.85	2.54	2.80
1205	NASDAQ	ATRO	Tue, Jan 21, 1997	2.96	3.01	2.49	2.49
1204	NASDAQ	ATRO	Mon, Jan 20, 1997	2.44	2.91	2.44	2.80
1203	NASDAQ	ATRO	Fri, Jan 17, 1997	2.18	2.28	2.08	2.28
1202	NASDAQ	ATRO	Thu, Jan 16, 1997	2.13	2.18	2.02	2.08
1201	NASDAQ	ATRO	Wed, Jan 15, 1997	2.02	2.13	2.02	2.08
1200	NASDAQ	ATRO	Tue, Jan 14, 1997	2.02	2.18	2.02	2.18
1199	NASDAQ	ATRO	Mon, Jan 13, 1997	2.18	2.18	2.02	2.08
1198	NASDAQ	ATRO	Fri, Jan 10, 1997	2.13	2.18	2.08	2.13
1197	NASDAQ	ATRO	Thu, Jan 9, 1997	2.13	2.13	2.02	2.02
1196	NASDAQ	ATRO	Wed, Jan 8, 1997	2.08	2.23	2.02	2.02
1195	NASDAQ	ATRO	Tue, Jan 7, 1997	2.23	2.23	2.08	2.08
1194	NASDAQ	ATRO	Mon, Jan 6, 1997	2.18	2.18	2.02	2.13
1193	NASDAQ	ATRO	Fri, Jan 3, 1997	2.08	2.10	2.08	2.10
1192	NASDAQ	ATRO	Thu, Jan 2, 1997	2.08	2.15	2.08	2.15
1191	NASDAQ	ATRO	Tue, Dec 31, 1996	2.23	2.23	2.08	2.08
1190	NASDAQ	ATRO	Mon, Dec 30, 1996	2.13	2.18	2.13	2.18
1189	NASDAQ	ATRO	Fri, Dec 27, 1996	2.13	2.13	2.13	2.13
1188	NASDAQ	ATRO	Tue, Dec 24, 1996	2.02	2.13	2.02	2.10
1187	NASDAQ	ATRO	Mon, Dec 23, 1996	2.02	2.13	2.02	2.08
1186	NASDAQ	ATRO	Fri, Dec 20, 1996	2.13	2.13	2.02	2.02
1185	NASDAQ	ATRO	Thu, Dec 19, 1996	2.13	2.13	2.13	2.13
1184	NASDAQ	ATRO	Wed, Dec 18, 1996	2.13	2.13	1.97	2.10
1183	NASDAQ	ATRO	Tue, Dec 17, 1996	2.10	2.10	1.97	1.97
1182	NASDAQ	ATRO	Mon, Dec 16, 1996	2.10	2.10	2.08	2.10
1181	NASDAQ	ATRO	Fri, Dec 13, 1996	2.02	2.08	1.97	1.97
1180	NASDAQ	ATRO	Thu, Dec 12, 1996	2.18	2.18	2.02	2.08
1179	NASDAQ	ATRO	Wed, Dec 11, 1996	2.18	2.33	2.13	2.13
1178	NASDAQ	ATRO	Tue, Dec 10, 1996	2.08	2.18	2.08	2.18
1177	NASDAQ	ATRO	Mon, Dec 9, 1996	2.10	2.18	2.08	2.18
1176	NASDAQ	ATRO	Fri, Dec 6, 1996	2.02	2.08	2.02	2.08
1175	NASDAQ	ATRO	Thu, Dec 5, 1996	2.02	2.18	2.02	2.10
1174	NASDAQ	ATRO	Wed, Dec 4, 1996	1.87	2.02	1.87	2.00
1173	NASDAQ	ATRO	Tue, Dec 3, 1996	2.00	2.00	1.87	1.92
1172	NASDAQ	ATRO	Mon, Dec 2, 1996	1.97	2.00	1.92	1.95
1171	NASDAQ	ATRO	Fri, Nov 29, 1996	2.00	2.00	1.97	2.00
1170	NASDAQ	ATRO	Wed, Nov 27, 1996	2.00	2.00	2.00	2.00
1169	NASDAQ	ATRO	Tue, Nov 26, 1996	2.05	2.08	1.97	2.00
1168	NASDAQ	ATRO	Mon, Nov 25, 1996	1.92	2.13	1.92	1.97
1167	NASDAQ	ATRO	Fri, Nov 22, 1996	1.92	2.02	1.92	1.97
1166	NASDAQ	ATRO	Thu, Nov 21, 1996	2.02	2.05	1.92	1.97
1165	NASDAQ	ATRO	Wed, Nov 20, 1996	2.02	2.08	2.02	2.02
1164	NASDAQ	ATRO	Tue, Nov 19, 1996	2.02	2.08	2.02	2.02
1163	NASDAQ	ATRO	Mon, Nov 18, 1996	2.02	2.05	2.02	2.02
1162	NASDAQ	ATRO	Fri, Nov 15, 1996	2.02	2.08	2.02	2.08
1161	NASDAQ	ATRO	Thu, Nov 14, 1996	2.02	2.13	2.02	2.02
1160	NASDAQ	ATRO	Tue, Nov 12, 1996	2.02	2.02	2.02	2.02
1159	NASDAQ	ATRO	Mon, Nov 11, 1996	2.02	2.13	2.02	2.13
1158	NASDAQ	ATRO	Fri, Nov 8, 1996	2.02	2.05	2.02	2.05
1157	NASDAQ	ATRO	Thu, Nov 7, 1996	2.02	2.08	2.02	2.08
1156	NASDAQ	ATRO	Wed, Nov 6, 1996	2.18	2.18	2.13	2.13
1155	NASDAQ	ATRO	Tue, Nov 5, 1996	2.13	2.18	2.13	2.13
1154	NASDAQ	ATRO	Mon, Nov 4, 1996	2.13	2.13	2.13	2.13
1153	NASDAQ	ATRO	Fri, Nov 1, 1996	2.13	2.23	2.13	2.13
1152	NASDAQ	ATRO	Thu, Oct 31, 1996	2.15	2.23	2.13	2.23
1151	NASDAQ	ATRO	Wed, Oct 30, 1996	2.23	2.23	2.13	2.13
1150	NASDAQ	ATRO	Tue, Oct 29, 1996	2.28	2.28	2.13	2.15
1149	NASDAQ	ATRO	Mon, Oct 28, 1996	2.13	2.28	2.13	2.28
1148	NASDAQ	ATRO	Fri, Oct 25, 1996	2.18	2.18	2.18	2.18
1147	NASDAQ	ATRO	Thu, Oct 24, 1996	2.18	2.23	2.18	2.18
1146	NASDAQ	ATRO	Wed, Oct 23, 1996	2.13	2.28	2.13	2.26
1145	NASDAQ	ATRO	Tue, Oct 22, 1996	2.18	2.23	2.18	2.23
1144	NASDAQ	ATRO	Mon, Oct 21, 1996	2.33	2.33	2.33	2.33
1143	NASDAQ	ATRO	Fri, Oct 18, 1996	2.18	2.28	2.18	2.18
1142	NASDAQ	ATRO	Thu, Oct 17, 1996	2.28	2.33	2.18	2.26
1141	NASDAQ	ATRO	Wed, Oct 16, 1996	2.28	2.28	2.28	2.28
1140	NASDAQ	ATRO	Tue, Oct 15, 1996	2.13	2.15	2.13	2.15
1139	NASDAQ	ATRO	Mon, Oct 14, 1996	2.13	2.13	2.13	2.13
1138	NASDAQ	ATRO	Fri, Oct 11, 1996	2.18	2.18	2.13	2.18
1137	NASDAQ	ATRO	Thu, Oct 10, 1996	2.33	2.33	2.33	2.33
1136	NASDAQ	ATRO	Wed, Oct 9, 1996	2.28	2.33	2.18	2.18
1135	NASDAQ	ATRO	Tue, Oct 8, 1996	2.49	2.49	2.33	2.36
1134	NASDAQ	ATRO	Mon, Oct 7, 1996	2.39	2.49	2.33	2.39
1133	NASDAQ	ATRO	Fri, Oct 4, 1996	2.33	2.39	2.28	2.33
1132	NASDAQ	ATRO	Thu, Oct 3, 1996	2.18	2.33	2.18	2.33
1131	NASDAQ	ATRO	Wed, Oct 2, 1996	2.13	2.28	2.13	2.28
1130	NASDAQ	ATRO	Tue, Oct 1, 1996	2.13	2.13	2.13	2.13
1129	NASDAQ	ATRO	Fri, Sep 27, 1996	2.16	2.16	2.08	2.08
1128	NASDAQ	ATRO	Thu, Sep 26, 1996	2.16	2.16	2.08	2.16
1127	NASDAQ	ATRO	Wed, Sep 25, 1996	2.12	2.12	2.03	2.03
1126	NASDAQ	ATRO	Tue, Sep 24, 1996	2.12	2.12	2.12	2.12
1125	NASDAQ	ATRO	Mon, Sep 23, 1996	2.12	2.12	2.12	2.12
1124	NASDAQ	ATRO	Fri, Sep 20, 1996	2.03	2.05	2.03	2.05
1123	NASDAQ	ATRO	Thu, Sep 19, 1996	2.16	2.16	2.16	2.16
1122	NASDAQ	ATRO	Wed, Sep 18, 1996	2.16	2.16	2.03	2.03
1121	NASDAQ	ATRO	Tue, Sep 17, 1996	2.08	2.12	2.03	2.08
1120	NASDAQ	ATRO	Mon, Sep 16, 1996	2.08	2.08	2.08	2.08
1119	NASDAQ	ATRO	Fri, Sep 13, 1996	2.16	2.16	2.12	2.16
1118	NASDAQ	ATRO	Thu, Sep 12, 1996	2.03	2.05	2.03	2.05
1117	NASDAQ	ATRO	Wed, Sep 11, 1996	2.16	2.16	2.03	2.16
1116	NASDAQ	ATRO	Tue, Sep 10, 1996	2.16	2.16	2.03	2.08
1115	NASDAQ	ATRO	Mon, Sep 9, 1996	2.16	2.16	2.08	2.08
1114	NASDAQ	ATRO	Fri, Sep 6, 1996	2.03	2.08	2.03	2.08
1113	NASDAQ	ATRO	Thu, Sep 5, 1996	2.03	2.08	2.03	2.03
1112	NASDAQ	ATRO	Wed, Sep 4, 1996	2.03	2.12	2.03	2.03
1111	NASDAQ	ATRO	Tue, Sep 3, 1996	2.20	2.24	2.08	2.08
1110	NASDAQ	ATRO	Fri, Aug 30, 1996	2.20	2.32	2.20	2.32
1109	NASDAQ	ATRO	Thu, Aug 29, 1996	2.16	2.32	2.16	2.24
1108	NASDAQ	ATRO	Tue, Aug 27, 1996	2.16	2.28	2.16	2.20
1107	NASDAQ	ATRO	Mon, Aug 26, 1996	2.28	2.32	2.26	2.26
1106	NASDAQ	ATRO	Fri, Aug 23, 1996	2.20	2.32	2.20	2.22
1105	NASDAQ	ATRO	Thu, Aug 22, 1996	2.12	2.16	2.12	2.16
1104	NASDAQ	ATRO	Wed, Aug 21, 1996	2.03	2.16	2.03	2.12
1103	NASDAQ	ATRO	Tue, Aug 20, 1996	2.24	2.24	2.08	2.16
1102	NASDAQ	ATRO	Mon, Aug 19, 1996	2.24	2.37	2.16	2.20
1101	NASDAQ	ATRO	Fri, Aug 16, 1996	2.20	2.32	2.16	2.32
1100	NASDAQ	ATRO	Thu, Aug 15, 1996	2.08	2.08	2.08	2.08
1099	NASDAQ	ATRO	Wed, Aug 14, 1996	2.08	2.08	1.99	1.99
1098	NASDAQ	ATRO	Tue, Aug 13, 1996	1.91	2.03	1.91	2.03
1097	NASDAQ	ATRO	Mon, Aug 12, 1996	1.91	1.99	1.91	1.91
1096	NASDAQ	ATRO	Fri, Aug 9, 1996	1.99	1.99	1.99	1.99
1095	NASDAQ	ATRO	Wed, Aug 7, 1996	2.03	2.03	1.91	1.91
1094	NASDAQ	ATRO	Tue, Aug 6, 1996	2.03	2.03	2.03	2.03
1093	NASDAQ	ATRO	Mon, Aug 5, 1996	2.03	2.03	2.03	2.03
1092	NASDAQ	ATRO	Fri, Aug 2, 1996	1.91	2.03	1.91	2.03
1091	NASDAQ	ATRO	Wed, Jul 31, 1996	1.87	1.95	1.87	1.87
1090	NASDAQ	ATRO	Tue, Jul 30, 1996	2.03	2.03	1.87	1.87
1089	NASDAQ	ATRO	Mon, Jul 29, 1996	2.03	2.03	1.87	1.87
1088	NASDAQ	ATRO	Fri, Jul 26, 1996	1.87	1.95	1.87	1.87
1087	NASDAQ	ATRO	Thu, Jul 25, 1996	1.89	1.89	1.87	1.87
1086	NASDAQ	ATRO	Wed, Jul 24, 1996	1.89	1.91	1.87	1.87
1085	NASDAQ	ATRO	Tue, Jul 23, 1996	1.89	1.95	1.87	1.87
1084	NASDAQ	ATRO	Mon, Jul 22, 1996	1.87	1.95	1.87	1.95
1083	NASDAQ	ATRO	Fri, Jul 19, 1996	1.87	1.91	1.87	1.91
1082	NASDAQ	ATRO	Thu, Jul 18, 1996	1.87	1.87	1.87	1.87
1081	NASDAQ	ATRO	Wed, Jul 17, 1996	1.87	1.95	1.87	1.87
1080	NASDAQ	ATRO	Tue, Jul 16, 1996	1.87	1.89	1.87	1.89
1079	NASDAQ	ATRO	Mon, Jul 15, 1996	1.87	1.91	1.87	1.91
1078	NASDAQ	ATRO	Fri, Jul 12, 1996	1.87	1.91	1.87	1.91
1077	NASDAQ	ATRO	Thu, Jul 11, 1996	1.99	1.99	1.87	1.91
1076	NASDAQ	ATRO	Wed, Jul 10, 1996	1.99	1.99	1.95	1.95
1075	NASDAQ	ATRO	Tue, Jul 9, 1996	1.83	1.83	1.83	1.83
1074	NASDAQ	ATRO	Mon, Jul 8, 1996	1.83	1.83	1.83	1.83
1073	NASDAQ	ATRO	Wed, Jul 3, 1996	1.99	1.99	1.83	1.83
1072	NASDAQ	ATRO	Tue, Jul 2, 1996	1.83	1.95	1.83	1.83
1071	NASDAQ	ATRO	Mon, Jul 1, 1996	1.74	1.99	1.74	1.99
1070	NASDAQ	ATRO	Fri, Jun 28, 1996	1.83	1.83	1.83	1.83
1069	NASDAQ	ATRO	Thu, Jun 27, 1996	1.83	1.83	1.70	1.78
1068	NASDAQ	ATRO	Wed, Jun 26, 1996	1.83	1.83	1.83	1.83
1067	NASDAQ	ATRO	Tue, Jun 25, 1996	1.83	1.83	1.70	1.70
1066	NASDAQ	ATRO	Mon, Jun 24, 1996	1.83	1.83	1.83	1.83
1065	NASDAQ	ATRO	Fri, Jun 21, 1996	1.83	1.83	1.74	1.74
1064	NASDAQ	ATRO	Thu, Jun 20, 1996	1.83	1.83	1.66	1.66
1063	NASDAQ	ATRO	Wed, Jun 19, 1996	1.74	1.87	1.62	1.83
1062	NASDAQ	ATRO	Tue, Jun 18, 1996	1.87	1.95	1.58	1.66
1061	NASDAQ	ATRO	Mon, Jun 17, 1996	1.99	1.99	1.87	1.87
1060	NASDAQ	ATRO	Fri, Jun 14, 1996	2.16	2.16	1.87	1.87
1059	NASDAQ	ATRO	Thu, Jun 13, 1996	2.03	2.12	1.99	2.12
1058	NASDAQ	ATRO	Wed, Jun 12, 1996	1.91	1.99	1.91	1.99
1057	NASDAQ	ATRO	Tue, Jun 11, 1996	1.99	2.03	1.91	1.91
1056	NASDAQ	ATRO	Mon, Jun 10, 1996	1.87	1.99	1.87	1.91
1055	NASDAQ	ATRO	Fri, Jun 7, 1996	1.95	1.99	1.87	1.87
1054	NASDAQ	ATRO	Thu, Jun 6, 1996	2.03	2.03	1.95	1.95
1053	NASDAQ	ATRO	Wed, Jun 5, 1996	1.95	1.99	1.95	1.99
1052	NASDAQ	ATRO	Tue, Jun 4, 1996	2.16	2.16	1.95	2.03
1051	NASDAQ	ATRO	Mon, Jun 3, 1996	2.20	2.20	2.08	2.08
1050	NASDAQ	ATRO	Fri, May 31, 1996	2.16	2.20	2.12	2.16
1049	NASDAQ	ATRO	Thu, May 30, 1996	2.16	2.24	2.16	2.16
1048	NASDAQ	ATRO	Wed, May 29, 1996	2.24	2.24	2.16	2.16
1047	NASDAQ	ATRO	Tue, May 28, 1996	2.24	2.24	2.12	2.20
1046	NASDAQ	ATRO	Fri, May 24, 1996	2.32	2.32	2.16	2.20
1045	NASDAQ	ATRO	Thu, May 23, 1996	2.32	2.32	2.12	2.24
1044	NASDAQ	ATRO	Wed, May 22, 1996	2.16	2.32	2.03	2.32
1043	NASDAQ	ATRO	Tue, May 21, 1996	1.91	2.20	1.87	2.16
1042	NASDAQ	ATRO	Mon, May 20, 1996	1.83	1.91	1.74	1.91
1041	NASDAQ	ATRO	Fri, May 17, 1996	1.78	1.83	1.78	1.83
1040	NASDAQ	ATRO	Thu, May 16, 1996	1.78	1.78	1.70	1.74
1039	NASDAQ	ATRO	Wed, May 15, 1996	1.78	1.78	1.70	1.72
1038	NASDAQ	ATRO	Tue, May 14, 1996	1.70	1.74	1.70	1.70
1037	NASDAQ	ATRO	Mon, May 13, 1996	1.70	1.78	1.70	1.70
1036	NASDAQ	ATRO	Fri, May 10, 1996	1.70	1.74	1.70	1.74
1035	NASDAQ	ATRO	Wed, May 8, 1996	1.70	1.74	1.70	1.70
1034	NASDAQ	ATRO	Tue, May 7, 1996	1.70	1.72	1.70	1.72
1033	NASDAQ	ATRO	Mon, May 6, 1996	1.70	1.78	1.70	1.70
1032	NASDAQ	ATRO	Fri, May 3, 1996	1.78	1.78	1.74	1.74
1031	NASDAQ	ATRO	Thu, May 2, 1996	1.70	1.78	1.70	1.78
1030	NASDAQ	ATRO	Wed, May 1, 1996	1.78	1.78	1.78	1.78
1029	NASDAQ	ATRO	Tue, Apr 30, 1996	1.78	1.78	1.70	1.78
1028	NASDAQ	ATRO	Mon, Apr 29, 1996	1.70	1.78	1.70	1.78
1027	NASDAQ	ATRO	Fri, Apr 26, 1996	1.78	1.78	1.70	1.72
1026	NASDAQ	ATRO	Thu, Apr 25, 1996	1.78	1.78	1.70	1.70
1025	NASDAQ	ATRO	Wed, Apr 24, 1996	1.70	1.70	1.70	1.70
1024	NASDAQ	ATRO	Tue, Apr 23, 1996	1.78	1.78	1.70	1.72
1023	NASDAQ	ATRO	Mon, Apr 22, 1996	1.78	1.78	1.70	1.78
1022	NASDAQ	ATRO	Fri, Apr 19, 1996	1.78	1.78	1.70	1.78
1021	NASDAQ	ATRO	Wed, Apr 17, 1996	1.74	1.78	1.70	1.70
1020	NASDAQ	ATRO	Tue, Apr 16, 1996	1.66	1.78	1.66	1.78
1019	NASDAQ	ATRO	Mon, Apr 15, 1996	1.78	1.78	1.66	1.68
1018	NASDAQ	ATRO	Fri, Apr 12, 1996	1.70	1.87	1.66	1.70
1017	NASDAQ	ATRO	Thu, Apr 11, 1996	1.62	1.66	1.58	1.62
1016	NASDAQ	ATRO	Wed, Apr 10, 1996	1.54	1.56	1.54	1.56
1015	NASDAQ	ATRO	Mon, Apr 8, 1996	1.62	1.62	1.54	1.58
1014	NASDAQ	ATRO	Thu, Apr 4, 1996	1.54	1.62	1.54	1.54
1013	NASDAQ	ATRO	Wed, Apr 3, 1996	1.62	1.62	1.58	1.62
1012	NASDAQ	ATRO	Mon, Apr 1, 1996	1.62	1.62	1.54	1.54
1011	NASDAQ	ATRO	Fri, Mar 29, 1996	1.54	1.54	1.54	1.54
1010	NASDAQ	ATRO	Thu, Mar 28, 1996	1.54	1.56	1.54	1.56
1009	NASDAQ	ATRO	Wed, Mar 27, 1996	1.54	1.62	1.54	1.62
1008	NASDAQ	ATRO	Tue, Mar 26, 1996	1.54	1.54	1.54	1.54
1007	NASDAQ	ATRO	Mon, Mar 25, 1996	1.54	1.58	1.54	1.56
1006	NASDAQ	ATRO	Fri, Mar 22, 1996	1.54	1.62	1.54	1.58
1005	NASDAQ	ATRO	Thu, Mar 21, 1996	1.58	1.58	1.54	1.56
1004	NASDAQ	ATRO	Wed, Mar 20, 1996	1.54	1.62	1.54	1.58
1003	NASDAQ	ATRO	Tue, Mar 19, 1996	1.62	1.62	1.62	1.62
1002	NASDAQ	ATRO	Mon, Mar 18, 1996	1.54	1.54	1.54	1.54
1001	NASDAQ	ATRO	Thu, Mar 14, 1996	1.54	1.62	1.54	1.54
1000	NASDAQ	ATRO	Wed, Mar 13, 1996	1.54	1.62	1.54	1.54
999	NASDAQ	ATRO	Tue, Mar 12, 1996	1.54	1.62	1.54	1.62
998	NASDAQ	ATRO	Mon, Mar 11, 1996	1.58	1.66	1.54	1.62
997	NASDAQ	ATRO	Fri, Mar 8, 1996	1.58	1.66	1.58	1.66
996	NASDAQ	ATRO	Thu, Mar 7, 1996	1.64	1.64	1.58	1.60
995	NASDAQ	ATRO	Wed, Mar 6, 1996	1.66	1.66	1.66	1.66
994	NASDAQ	ATRO	Tue, Mar 5, 1996	1.66	1.66	1.58	1.58
993	NASDAQ	ATRO	Mon, Mar 4, 1996	1.58	1.66	1.58	1.66
992	NASDAQ	ATRO	Fri, Mar 1, 1996	1.58	1.66	1.58	1.62
991	NASDAQ	ATRO	Thu, Feb 29, 1996	1.58	1.62	1.58	1.62
990	NASDAQ	ATRO	Wed, Feb 28, 1996	1.58	1.58	1.58	1.58
989	NASDAQ	ATRO	Tue, Feb 27, 1996	1.66	1.66	1.58	1.58
988	NASDAQ	ATRO	Mon, Feb 26, 1996	1.66	1.66	1.58	1.58
987	NASDAQ	ATRO	Fri, Feb 23, 1996	1.58	1.66	1.58	1.66
986	NASDAQ	ATRO	Thu, Feb 22, 1996	1.66	1.66	1.58	1.58
985	NASDAQ	ATRO	Wed, Feb 21, 1996	1.62	1.66	1.58	1.66
984	NASDAQ	ATRO	Tue, Feb 20, 1996	1.66	1.66	1.37	1.62
983	NASDAQ	ATRO	Fri, Feb 16, 1996	1.74	1.87	1.66	1.66
982	NASDAQ	ATRO	Thu, Feb 15, 1996	1.83	1.87	1.74	1.83
981	NASDAQ	ATRO	Wed, Feb 14, 1996	1.87	1.87	1.74	1.83
980	NASDAQ	ATRO	Tue, Feb 13, 1996	1.83	1.87	1.74	1.83
979	NASDAQ	ATRO	Mon, Feb 12, 1996	1.76	1.91	1.70	1.83
978	NASDAQ	ATRO	Fri, Feb 9, 1996	1.66	1.70	1.60	1.70
977	NASDAQ	ATRO	Thu, Feb 8, 1996	1.49	1.66	1.49	1.62
976	NASDAQ	ATRO	Wed, Feb 7, 1996	1.45	1.54	1.39	1.49
975	NASDAQ	ATRO	Tue, Feb 6, 1996	1.39	1.47	1.39	1.47
974	NASDAQ	ATRO	Mon, Feb 5, 1996	1.41	1.49	1.37	1.49
973	NASDAQ	ATRO	Fri, Feb 2, 1996	1.33	1.41	1.33	1.37
972	NASDAQ	ATRO	Thu, Feb 1, 1996	1.29	1.41	1.29	1.41
971	NASDAQ	ATRO	Wed, Jan 31, 1996	1.35	1.41	1.33	1.37
970	NASDAQ	ATRO	Tue, Jan 30, 1996	1.33	1.37	1.25	1.33
969	NASDAQ	ATRO	Mon, Jan 29, 1996	1.29	1.37	1.25	1.33
968	NASDAQ	ATRO	Fri, Jan 26, 1996	1.22	1.22	1.22	1.22
967	NASDAQ	ATRO	Wed, Jan 24, 1996	1.25	1.25	1.25	1.25
966	NASDAQ	ATRO	Tue, Jan 23, 1996	1.25	1.25	1.25	1.25
965	NASDAQ	ATRO	Mon, Jan 22, 1996	1.16	1.25	1.16	1.25
964	NASDAQ	ATRO	Thu, Jan 18, 1996	1.16	1.18	1.16	1.18
963	NASDAQ	ATRO	Wed, Jan 17, 1996	1.16	1.25	1.16	1.25
962	NASDAQ	ATRO	Mon, Jan 15, 1996	1.25	1.25	1.25	1.25
961	NASDAQ	ATRO	Fri, Jan 12, 1996	1.16	1.25	1.16	1.25
960	NASDAQ	ATRO	Thu, Jan 11, 1996	1.25	1.25	1.25	1.25
959	NASDAQ	ATRO	Wed, Jan 10, 1996	1.25	1.25	1.16	1.18
958	NASDAQ	ATRO	Tue, Jan 9, 1996	1.16	1.20	1.16	1.18
957	NASDAQ	ATRO	Mon, Jan 8, 1996	1.16	1.16	1.16	1.16
956	NASDAQ	ATRO	Thu, Jan 4, 1996	1.16	1.20	1.16	1.16
955	NASDAQ	ATRO	Wed, Jan 3, 1996	1.16	1.25	1.16	1.25
954	NASDAQ	ATRO	Tue, Jan 2, 1996	1.29	1.29	1.16	1.25
953	NASDAQ	ATRO	Fri, Dec 29, 1995	1.16	1.16	1.16	1.16
952	NASDAQ	ATRO	Thu, Dec 28, 1995	1.16	1.20	1.16	1.16
951	NASDAQ	ATRO	Wed, Dec 27, 1995	1.16	1.25	1.16	1.25
950	NASDAQ	ATRO	Tue, Dec 26, 1995	1.20	1.20	1.20	1.20
949	NASDAQ	ATRO	Fri, Dec 22, 1995	1.25	1.25	1.20	1.20
948	NASDAQ	ATRO	Wed, Dec 20, 1995	1.18	1.18	1.12	1.12
947	NASDAQ	ATRO	Tue, Dec 19, 1995	1.12	1.16	1.08	1.16
946	NASDAQ	ATRO	Mon, Dec 18, 1995	1.20	1.20	1.20	1.20
945	NASDAQ	ATRO	Fri, Dec 15, 1995	1.20	1.20	1.20	1.20
944	NASDAQ	ATRO	Thu, Dec 14, 1995	1.20	1.29	1.20	1.20
943	NASDAQ	ATRO	Wed, Dec 13, 1995	1.20	1.25	1.20	1.25
942	NASDAQ	ATRO	Tue, Dec 12, 1995	1.20	1.29	1.20	1.25
941	NASDAQ	ATRO	Mon, Dec 11, 1995	1.29	1.29	1.16	1.22
940	NASDAQ	ATRO	Fri, Dec 8, 1995	1.29	1.29	1.16	1.16
939	NASDAQ	ATRO	Thu, Dec 7, 1995	1.29	1.29	1.16	1.25
938	NASDAQ	ATRO	Wed, Dec 6, 1995	1.08	1.29	1.02	1.29
937	NASDAQ	ATRO	Tue, Dec 5, 1995	1.08	1.08	1.02	1.02
936	NASDAQ	ATRO	Mon, Dec 4, 1995	1.00	1.08	1.00	1.02
935	NASDAQ	ATRO	Fri, Dec 1, 1995	1.06	1.08	1.00	1.08
934	NASDAQ	ATRO	Thu, Nov 30, 1995	1.02	1.08	1.00	1.06
933	NASDAQ	ATRO	Wed, Nov 29, 1995	0.98	1.02	0.98	1.00
932	NASDAQ	ATRO	Mon, Nov 27, 1995	0.98	1.02	0.98	1.02
931	NASDAQ	ATRO	Fri, Nov 24, 1995	0.98	0.98	0.98	0.98
930	NASDAQ	ATRO	Wed, Nov 22, 1995	0.98	1.00	0.98	1.00
929	NASDAQ	ATRO	Tue, Nov 21, 1995	1.04	1.04	1.04	1.04
928	NASDAQ	ATRO	Mon, Nov 20, 1995	0.98	1.04	0.98	0.98
927	NASDAQ	ATRO	Fri, Nov 17, 1995	0.98	0.98	0.98	0.98
926	NASDAQ	ATRO	Thu, Nov 16, 1995	1.00	1.00	0.98	0.98
925	NASDAQ	ATRO	Wed, Nov 15, 1995	0.98	0.98	0.98	0.98
924	NASDAQ	ATRO	Tue, Nov 14, 1995	1.04	1.04	0.98	1.00
923	NASDAQ	ATRO	Mon, Nov 13, 1995	1.00	1.00	1.00	1.00
922	NASDAQ	ATRO	Fri, Nov 10, 1995	1.00	1.00	1.00	1.00
921	NASDAQ	ATRO	Thu, Nov 9, 1995	1.00	1.00	0.98	0.98
920	NASDAQ	ATRO	Wed, Nov 8, 1995	1.00	1.00	0.98	0.98
919	NASDAQ	ATRO	Tue, Nov 7, 1995	1.02	1.02	0.98	0.98
918	NASDAQ	ATRO	Mon, Nov 6, 1995	1.00	1.00	1.00	1.00
917	NASDAQ	ATRO	Fri, Nov 3, 1995	1.00	1.00	0.98	1.00
916	NASDAQ	ATRO	Thu, Nov 2, 1995	1.08	1.08	1.08	1.08
915	NASDAQ	ATRO	Wed, Nov 1, 1995	0.98	1.04	0.98	1.02
914	NASDAQ	ATRO	Tue, Oct 31, 1995	1.00	1.00	1.00	1.00
913	NASDAQ	ATRO	Fri, Oct 27, 1995	1.00	1.00	0.98	1.00
912	NASDAQ	ATRO	Thu, Oct 26, 1995	0.98	0.99	0.98	0.98
911	NASDAQ	ATRO	Wed, Oct 25, 1995	0.98	0.98	0.98	0.98
910	NASDAQ	ATRO	Tue, Oct 24, 1995	0.98	1.00	0.98	1.00
909	NASDAQ	ATRO	Mon, Oct 23, 1995	0.98	1.00	0.98	1.00
908	NASDAQ	ATRO	Fri, Oct 20, 1995	0.98	1.00	0.98	1.00
907	NASDAQ	ATRO	Wed, Oct 18, 1995	0.98	0.98	0.98	0.98
906	NASDAQ	ATRO	Mon, Oct 16, 1995	0.98	1.04	0.98	0.98
905	NASDAQ	ATRO	Fri, Oct 13, 1995	1.04	1.04	1.04	1.04
904	NASDAQ	ATRO	Thu, Oct 12, 1995	1.04	1.04	1.04	1.04
903	NASDAQ	ATRO	Tue, Oct 10, 1995	0.98	0.98	0.98	0.98
902	NASDAQ	ATRO	Fri, Oct 6, 1995	0.98	1.04	0.98	0.98
901	NASDAQ	ATRO	Thu, Oct 5, 1995	1.04	1.04	0.98	0.98
900	NASDAQ	ATRO	Wed, Oct 4, 1995	0.98	1.04	0.98	1.04
899	NASDAQ	ATRO	Tue, Oct 3, 1995	1.06	1.06	0.98	1.00
898	NASDAQ	ATRO	Mon, Oct 2, 1995	1.06	1.06	1.06	1.06
897	NASDAQ	ATRO	Fri, Sep 29, 1995	0.98	1.02	0.98	1.00
896	NASDAQ	ATRO	Thu, Sep 28, 1995	0.98	0.98	0.98	0.98
895	NASDAQ	ATRO	Wed, Sep 27, 1995	0.98	0.98	0.98	0.98
894	NASDAQ	ATRO	Mon, Sep 25, 1995	1.08	1.08	1.08	1.08
893	NASDAQ	ATRO	Fri, Sep 22, 1995	0.98	0.98	0.98	0.98
892	NASDAQ	ATRO	Thu, Sep 21, 1995	1.08	1.08	0.98	0.98
891	NASDAQ	ATRO	Mon, Sep 18, 1995	1.00	1.00	0.98	0.98
890	NASDAQ	ATRO	Fri, Sep 15, 1995	1.00	1.04	1.00	1.00
889	NASDAQ	ATRO	Thu, Sep 14, 1995	1.00	1.00	1.00	1.00
888	NASDAQ	ATRO	Wed, Sep 13, 1995	0.98	0.98	0.98	0.98
887	NASDAQ	ATRO	Tue, Sep 12, 1995	0.98	1.10	0.98	1.08
886	NASDAQ	ATRO	Mon, Sep 11, 1995	1.04	1.04	1.04	1.04
885	NASDAQ	ATRO	Thu, Sep 7, 1995	0.98	0.98	0.98	0.98
884	NASDAQ	ATRO	Wed, Sep 6, 1995	1.00	1.00	0.98	0.98
883	NASDAQ	ATRO	Tue, Sep 5, 1995	0.98	0.98	0.98	0.98
882	NASDAQ	ATRO	Fri, Sep 1, 1995	1.04	1.04	1.00	1.00
881	NASDAQ	ATRO	Thu, Aug 31, 1995	0.98	1.04	0.98	1.04
880	NASDAQ	ATRO	Wed, Aug 30, 1995	0.98	1.04	0.98	1.04
879	NASDAQ	ATRO	Tue, Aug 29, 1995	1.00	1.08	0.98	1.04
878	NASDAQ	ATRO	Mon, Aug 28, 1995	1.08	1.08	1.04	1.04
877	NASDAQ	ATRO	Fri, Aug 25, 1995	0.98	1.08	0.98	1.00
876	NASDAQ	ATRO	Thu, Aug 24, 1995	0.98	1.02	0.98	1.00
875	NASDAQ	ATRO	Wed, Aug 23, 1995	1.10	1.10	0.98	0.98
874	NASDAQ	ATRO	Tue, Aug 22, 1995	1.06	1.10	1.02	1.10
873	NASDAQ	ATRO	Mon, Aug 21, 1995	1.06	1.06	1.06	1.06
872	NASDAQ	ATRO	Thu, Aug 17, 1995	1.00	1.00	1.00	1.00
871	NASDAQ	ATRO	Wed, Aug 16, 1995	1.08	1.08	0.98	0.98
870	NASDAQ	ATRO	Tue, Aug 15, 1995	0.98	1.02	0.98	1.02
869	NASDAQ	ATRO	Fri, Aug 11, 1995	0.98	1.02	0.98	1.02
868	NASDAQ	ATRO	Thu, Aug 10, 1995	1.00	1.00	1.00	1.00
867	NASDAQ	ATRO	Wed, Aug 9, 1995	0.98	1.00	0.98	1.00
866	NASDAQ	ATRO	Tue, Aug 8, 1995	1.08	1.08	0.98	0.98
865	NASDAQ	ATRO	Mon, Aug 7, 1995	0.98	1.00	0.98	1.00
864	NASDAQ	ATRO	Fri, Aug 4, 1995	1.00	1.04	1.00	1.00
863	NASDAQ	ATRO	Thu, Aug 3, 1995	1.10	1.10	1.06	1.06
862	NASDAQ	ATRO	Wed, Aug 2, 1995	0.98	1.02	0.98	1.00
861	NASDAQ	ATRO	Tue, Aug 1, 1995	1.10	1.10	1.10	1.10
860	NASDAQ	ATRO	Mon, Jul 31, 1995	0.98	0.98	0.98	0.98
859	NASDAQ	ATRO	Fri, Jul 28, 1995	1.02	1.10	0.98	1.00
858	NASDAQ	ATRO	Thu, Jul 27, 1995	1.02	1.02	1.02	1.02
857	NASDAQ	ATRO	Wed, Jul 26, 1995	0.98	1.02	0.98	1.02
856	NASDAQ	ATRO	Tue, Jul 25, 1995	1.02	1.02	1.00	1.00
855	NASDAQ	ATRO	Mon, Jul 24, 1995	0.98	1.02	0.98	1.02
854	NASDAQ	ATRO	Fri, Jul 21, 1995	0.98	0.98	0.98	0.98
853	NASDAQ	ATRO	Thu, Jul 20, 1995	1.02	1.02	0.98	0.98
852	NASDAQ	ATRO	Wed, Jul 19, 1995	0.98	0.98	0.98	0.98
851	NASDAQ	ATRO	Tue, Jul 18, 1995	0.98	1.02	0.98	1.00
850	NASDAQ	ATRO	Mon, Jul 17, 1995	1.02	1.02	0.98	0.98
849	NASDAQ	ATRO	Fri, Jul 14, 1995	0.98	0.98	0.98	0.98
848	NASDAQ	ATRO	Thu, Jul 13, 1995	0.98	1.00	0.98	1.00
847	NASDAQ	ATRO	Wed, Jul 12, 1995	0.98	0.98	0.98	0.98
846	NASDAQ	ATRO	Tue, Jul 11, 1995	0.98	1.02	0.98	1.02
845	NASDAQ	ATRO	Mon, Jul 10, 1995	0.98	0.98	0.98	0.98
844	NASDAQ	ATRO	Thu, Jul 6, 1995	1.02	1.02	0.98	0.98
843	NASDAQ	ATRO	Wed, Jul 5, 1995	1.02	1.02	1.00	1.00
842	NASDAQ	ATRO	Fri, Jun 30, 1995	0.99	0.99	0.98	0.98
841	NASDAQ	ATRO	Thu, Jun 29, 1995	1.00	1.02	0.98	1.00
840	NASDAQ	ATRO	Wed, Jun 28, 1995	0.98	1.02	0.98	1.00
839	NASDAQ	ATRO	Tue, Jun 27, 1995	0.98	0.98	0.98	0.98
838	NASDAQ	ATRO	Mon, Jun 26, 1995	0.98	1.00	0.98	1.00
837	NASDAQ	ATRO	Fri, Jun 23, 1995	0.98	1.02	0.98	1.02
836	NASDAQ	ATRO	Wed, Jun 21, 1995	0.98	0.98	0.98	0.98
835	NASDAQ	ATRO	Tue, Jun 20, 1995	1.02	1.02	0.98	1.00
834	NASDAQ	ATRO	Mon, Jun 19, 1995	1.00	1.00	0.98	0.98
833	NASDAQ	ATRO	Fri, Jun 16, 1995	0.98	1.00	0.98	0.98
832	NASDAQ	ATRO	Thu, Jun 15, 1995	0.98	0.98	0.98	0.98
831	NASDAQ	ATRO	Wed, Jun 14, 1995	1.00	1.00	0.98	0.98
830	NASDAQ	ATRO	Tue, Jun 13, 1995	0.98	1.02	0.98	1.00
829	NASDAQ	ATRO	Mon, Jun 12, 1995	0.98	1.00	0.98	0.98
828	NASDAQ	ATRO	Fri, Jun 9, 1995	1.02	1.02	1.02	1.02
827	NASDAQ	ATRO	Thu, Jun 8, 1995	0.98	1.02	0.98	1.02
826	NASDAQ	ATRO	Wed, Jun 7, 1995	1.00	1.00	0.98	0.98
825	NASDAQ	ATRO	Tue, Jun 6, 1995	0.98	0.98	0.98	0.98
824	NASDAQ	ATRO	Mon, Jun 5, 1995	1.02	1.02	0.98	0.98
823	NASDAQ	ATRO	Fri, Jun 2, 1995	0.98	1.00	0.98	0.98
822	NASDAQ	ATRO	Thu, Jun 1, 1995	1.00	1.02	0.98	1.00
821	NASDAQ	ATRO	Wed, May 31, 1995	1.02	1.02	0.98	0.98
820	NASDAQ	ATRO	Tue, May 30, 1995	0.98	0.98	0.98	0.98
819	NASDAQ	ATRO	Fri, May 26, 1995	0.95	1.02	0.95	1.00
818	NASDAQ	ATRO	Thu, May 25, 1995	1.04	1.04	0.95	0.95
817	NASDAQ	ATRO	Tue, May 23, 1995	1.04	1.04	1.00	1.00
816	NASDAQ	ATRO	Mon, May 22, 1995	1.00	1.04	0.95	0.98
815	NASDAQ	ATRO	Fri, May 19, 1995	1.00	1.00	1.00	1.00
814	NASDAQ	ATRO	Thu, May 18, 1995	0.95	1.04	0.95	1.04
813	NASDAQ	ATRO	Wed, May 17, 1995	1.04	1.04	0.95	0.95
812	NASDAQ	ATRO	Tue, May 16, 1995	0.95	1.04	0.95	1.04
811	NASDAQ	ATRO	Mon, May 15, 1995	1.00	1.00	0.95	1.00
810	NASDAQ	ATRO	Fri, May 12, 1995	0.95	1.00	0.95	0.95
809	NASDAQ	ATRO	Thu, May 11, 1995	1.04	1.08	0.95	1.00
808	NASDAQ	ATRO	Wed, May 10, 1995	0.95	1.04	0.95	1.04
807	NASDAQ	ATRO	Tue, May 9, 1995	0.95	0.95	0.87	0.95
806	NASDAQ	ATRO	Mon, May 8, 1995	0.87	0.95	0.87	0.91
805	NASDAQ	ATRO	Fri, May 5, 1995	0.87	0.91	0.87	0.87
804	NASDAQ	ATRO	Thu, May 4, 1995	0.95	0.95	0.87	0.87
803	NASDAQ	ATRO	Wed, May 3, 1995	0.87	0.91	0.87	0.87
802	NASDAQ	ATRO	Tue, May 2, 1995	0.95	0.95	0.91	0.91
801	NASDAQ	ATRO	Mon, May 1, 1995	0.95	0.95	0.91	0.91
800	NASDAQ	ATRO	Fri, Apr 28, 1995	0.95	0.95	0.87	0.87
799	NASDAQ	ATRO	Thu, Apr 27, 1995	0.87	0.87	0.87	0.87
798	NASDAQ	ATRO	Wed, Apr 26, 1995	0.95	0.95	0.87	0.91
797	NASDAQ	ATRO	Tue, Apr 25, 1995	0.93	0.95	0.91	0.91
796	NASDAQ	ATRO	Mon, Apr 24, 1995	0.91	0.95	0.87	0.95
795	NASDAQ	ATRO	Fri, Apr 21, 1995	0.83	0.83	0.83	0.83
794	NASDAQ	ATRO	Wed, Apr 19, 1995	0.91	0.91	0.83	0.83
793	NASDAQ	ATRO	Tue, Apr 18, 1995	0.83	0.91	0.83	0.83
792	NASDAQ	ATRO	Mon, Apr 17, 1995	0.91	0.91	0.91	0.91
791	NASDAQ	ATRO	Thu, Apr 13, 1995	0.87	0.91	0.83	0.91
790	NASDAQ	ATRO	Wed, Apr 12, 1995	0.87	0.87	0.85	0.87
789	NASDAQ	ATRO	Tue, Apr 11, 1995	0.83	0.85	0.83	0.83
788	NASDAQ	ATRO	Mon, Apr 10, 1995	0.83	0.83	0.83	0.83
787	NASDAQ	ATRO	Fri, Apr 7, 1995	0.83	0.83	0.83	0.83
786	NASDAQ	ATRO	Thu, Apr 6, 1995	0.87	0.87	0.87	0.87
785	NASDAQ	ATRO	Wed, Apr 5, 1995	0.83	0.83	0.83	0.83
784	NASDAQ	ATRO	Tue, Apr 4, 1995	0.83	0.83	0.83	0.83
783	NASDAQ	ATRO	Mon, Apr 3, 1995	0.83	0.83	0.83	0.83
782	NASDAQ	ATRO	Fri, Mar 31, 1995	0.83	0.87	0.83	0.83
781	NASDAQ	ATRO	Thu, Mar 30, 1995	0.87	0.87	0.83	0.83
780	NASDAQ	ATRO	Wed, Mar 29, 1995	0.83	0.83	0.83	0.83
779	NASDAQ	ATRO	Tue, Mar 28, 1995	0.83	0.91	0.83	0.83
778	NASDAQ	ATRO	Mon, Mar 27, 1995	0.83	0.83	0.83	0.83
777	NASDAQ	ATRO	Thu, Mar 23, 1995	0.83	0.83	0.83	0.83
776	NASDAQ	ATRO	Wed, Mar 22, 1995	0.83	0.83	0.83	0.83
775	NASDAQ	ATRO	Tue, Mar 21, 1995	0.83	0.91	0.83	0.83
774	NASDAQ	ATRO	Fri, Mar 17, 1995	0.83	0.83	0.83	0.83
773	NASDAQ	ATRO	Thu, Mar 16, 1995	0.83	0.83	0.83	0.83
772	NASDAQ	ATRO	Wed, Mar 15, 1995	0.91	0.91	0.83	0.83
771	NASDAQ	ATRO	Tue, Mar 14, 1995	0.79	0.87	0.79	0.87
770	NASDAQ	ATRO	Mon, Mar 13, 1995	0.79	0.87	0.79	0.83
769	NASDAQ	ATRO	Fri, Mar 10, 1995	0.83	0.83	0.79	0.83
768	NASDAQ	ATRO	Thu, Mar 9, 1995	0.79	0.83	0.79	0.79
767	NASDAQ	ATRO	Wed, Mar 8, 1995	0.79	0.79	0.79	0.79
766	NASDAQ	ATRO	Tue, Mar 7, 1995	0.83	0.83	0.83	0.83
765	NASDAQ	ATRO	Mon, Mar 6, 1995	0.79	0.83	0.79	0.83
764	NASDAQ	ATRO	Thu, Mar 2, 1995	0.87	0.87	0.79	0.79
763	NASDAQ	ATRO	Wed, Mar 1, 1995	0.79	0.79	0.79	0.79
762	NASDAQ	ATRO	Fri, Feb 24, 1995	0.87	0.87	0.79	0.79
761	NASDAQ	ATRO	Thu, Feb 23, 1995	0.79	0.79	0.79	0.79
760	NASDAQ	ATRO	Wed, Feb 22, 1995	0.79	0.87	0.79	0.79
759	NASDAQ	ATRO	Tue, Feb 21, 1995	0.79	0.79	0.79	0.79
758	NASDAQ	ATRO	Fri, Feb 17, 1995	0.79	0.79	0.79	0.79
757	NASDAQ	ATRO	Wed, Feb 15, 1995	0.79	0.79	0.79	0.79
756	NASDAQ	ATRO	Mon, Feb 13, 1995	0.87	0.87	0.79	0.87
755	NASDAQ	ATRO	Fri, Feb 10, 1995	0.79	0.79	0.79	0.79
754	NASDAQ	ATRO	Wed, Feb 8, 1995	0.87	0.87	0.87	0.87
753	NASDAQ	ATRO	Tue, Feb 7, 1995	0.81	0.83	0.79	0.79
752	NASDAQ	ATRO	Mon, Feb 6, 1995	0.79	0.79	0.79	0.79
751	NASDAQ	ATRO	Fri, Feb 3, 1995	0.83	0.83	0.79	0.79
750	NASDAQ	ATRO	Thu, Feb 2, 1995	0.83	0.83	0.83	0.83
749	NASDAQ	ATRO	Wed, Feb 1, 1995	0.83	0.91	0.83	0.87
748	NASDAQ	ATRO	Tue, Jan 31, 1995	0.83	0.83	0.83	0.83
747	NASDAQ	ATRO	Mon, Jan 30, 1995	0.91	0.91	0.83	0.87
746	NASDAQ	ATRO	Fri, Jan 27, 1995	0.87	0.91	0.83	0.83
745	NASDAQ	ATRO	Thu, Jan 26, 1995	0.83	0.87	0.83	0.87
744	NASDAQ	ATRO	Wed, Jan 25, 1995	0.91	0.95	0.87	0.87
743	NASDAQ	ATRO	Tue, Jan 24, 1995	0.79	0.93	0.79	0.93
742	NASDAQ	ATRO	Mon, Jan 23, 1995	0.79	0.83	0.79	0.79
741	NASDAQ	ATRO	Fri, Jan 20, 1995	0.75	0.79	0.75	0.75
740	NASDAQ	ATRO	Thu, Jan 19, 1995	0.79	0.83	0.75	0.83
739	NASDAQ	ATRO	Wed, Jan 18, 1995	0.71	0.71	0.71	0.71
738	NASDAQ	ATRO	Tue, Jan 17, 1995	0.71	0.79	0.71	0.79
737	NASDAQ	ATRO	Mon, Jan 16, 1995	0.71	0.75	0.66	0.75
736	NASDAQ	ATRO	Fri, Jan 13, 1995	0.66	0.75	0.66	0.75
735	NASDAQ	ATRO	Thu, Jan 12, 1995	0.66	0.66	0.66	0.66
734	NASDAQ	ATRO	Wed, Jan 11, 1995	0.66	0.75	0.66	0.75
733	NASDAQ	ATRO	Tue, Jan 10, 1995	0.71	0.71	0.66	0.66
732	NASDAQ	ATRO	Mon, Jan 9, 1995	0.66	0.66	0.66	0.66
731	NASDAQ	ATRO	Fri, Jan 6, 1995	0.66	0.66	0.66	0.66
730	NASDAQ	ATRO	Wed, Jan 4, 1995	0.66	0.68	0.66	0.66
729	NASDAQ	ATRO	Tue, Jan 3, 1995	0.66	0.75	0.66	0.66
728	NASDAQ	ATRO	Fri, Dec 30, 1994	0.66	0.75	0.66	0.75
727	NASDAQ	ATRO	Thu, Dec 29, 1994	0.66	0.66	0.66	0.66
726	NASDAQ	ATRO	Wed, Dec 28, 1994	0.66	0.66	0.66	0.66
725	NASDAQ	ATRO	Tue, Dec 27, 1994	0.66	0.75	0.66	0.66
724	NASDAQ	ATRO	Fri, Dec 23, 1994	0.66	0.71	0.66	0.71
723	NASDAQ	ATRO	Thu, Dec 22, 1994	0.66	0.75	0.66	0.75
722	NASDAQ	ATRO	Wed, Dec 21, 1994	0.75	0.75	0.66	0.66
721	NASDAQ	ATRO	Tue, Dec 20, 1994	0.66	0.71	0.66	0.66
720	NASDAQ	ATRO	Mon, Dec 19, 1994	0.75	0.75	0.66	0.66
719	NASDAQ	ATRO	Fri, Dec 16, 1994	0.66	0.66	0.66	0.66
718	NASDAQ	ATRO	Thu, Dec 15, 1994	0.66	0.75	0.66	0.66
717	NASDAQ	ATRO	Wed, Dec 14, 1994	0.66	0.66	0.66	0.66
716	NASDAQ	ATRO	Tue, Dec 13, 1994	0.66	0.66	0.66	0.66
715	NASDAQ	ATRO	Mon, Dec 12, 1994	0.66	0.68	0.66	0.66
714	NASDAQ	ATRO	Fri, Dec 9, 1994	0.66	0.66	0.66	0.66
713	NASDAQ	ATRO	Thu, Dec 8, 1994	0.66	0.66	0.66	0.66
712	NASDAQ	ATRO	Tue, Dec 6, 1994	0.66	0.66	0.66	0.66
711	NASDAQ	ATRO	Mon, Dec 5, 1994	0.66	0.71	0.66	0.71
710	NASDAQ	ATRO	Fri, Dec 2, 1994	0.66	0.66	0.66	0.66
709	NASDAQ	ATRO	Thu, Dec 1, 1994	0.66	0.66	0.66	0.66
708	NASDAQ	ATRO	Wed, Nov 30, 1994	0.75	0.75	0.66	0.66
707	NASDAQ	ATRO	Tue, Nov 29, 1994	0.66	0.66	0.66	0.66
706	NASDAQ	ATRO	Mon, Nov 28, 1994	0.71	0.71	0.66	0.66
705	NASDAQ	ATRO	Wed, Nov 23, 1994	0.71	0.71	0.66	0.66
704	NASDAQ	ATRO	Tue, Nov 22, 1994	0.66	0.71	0.66	0.71
703	NASDAQ	ATRO	Fri, Nov 18, 1994	0.66	0.66	0.66	0.66
702	NASDAQ	ATRO	Wed, Nov 16, 1994	0.75	0.75	0.66	0.66
701	NASDAQ	ATRO	Tue, Nov 15, 1994	0.71	0.71	0.66	0.66
700	NASDAQ	ATRO	Mon, Nov 14, 1994	0.71	0.71	0.71	0.71
699	NASDAQ	ATRO	Fri, Nov 11, 1994	0.66	0.66	0.66	0.66
698	NASDAQ	ATRO	Thu, Nov 10, 1994	0.66	0.75	0.66	0.75
697	NASDAQ	ATRO	Tue, Nov 8, 1994	0.66	0.66	0.66	0.66
696	NASDAQ	ATRO	Fri, Nov 4, 1994	0.66	0.66	0.66	0.66
695	NASDAQ	ATRO	Thu, Nov 3, 1994	0.66	0.66	0.66	0.66
694	NASDAQ	ATRO	Tue, Nov 1, 1994	0.75	0.75	0.71	0.71
693	NASDAQ	ATRO	Mon, Oct 31, 1994	0.75	0.75	0.75	0.75
692	NASDAQ	ATRO	Fri, Oct 28, 1994	0.66	0.66	0.66	0.66
691	NASDAQ	ATRO	Thu, Oct 27, 1994	0.66	0.71	0.66	0.71
690	NASDAQ	ATRO	Wed, Oct 26, 1994	0.71	0.71	0.71	0.71
689	NASDAQ	ATRO	Tue, Oct 25, 1994	0.75	0.75	0.62	0.66
688	NASDAQ	ATRO	Mon, Oct 24, 1994	0.62	0.71	0.62	0.62
687	NASDAQ	ATRO	Fri, Oct 21, 1994	0.66	0.66	0.66	0.66
686	NASDAQ	ATRO	Thu, Oct 20, 1994	0.62	0.62	0.62	0.62
685	NASDAQ	ATRO	Wed, Oct 19, 1994	0.62	0.62	0.62	0.62
684	NASDAQ	ATRO	Thu, Oct 13, 1994	0.62	0.62	0.62	0.62
683	NASDAQ	ATRO	Wed, Oct 12, 1994	0.62	0.62	0.62	0.62
682	NASDAQ	ATRO	Tue, Oct 11, 1994	0.71	0.75	0.62	0.75
681	NASDAQ	ATRO	Mon, Oct 10, 1994	0.71	0.71	0.71	0.71
680	NASDAQ	ATRO	Fri, Oct 7, 1994	0.62	0.71	0.62	0.71
679	NASDAQ	ATRO	Thu, Oct 6, 1994	0.66	0.66	0.66	0.66
678	NASDAQ	ATRO	Wed, Oct 5, 1994	0.62	0.62	0.62	0.62
677	NASDAQ	ATRO	Mon, Oct 3, 1994	0.62	0.66	0.62	0.66
676	NASDAQ	ATRO	Fri, Sep 30, 1994	0.66	0.71	0.66	0.71
675	NASDAQ	ATRO	Thu, Sep 29, 1994	0.71	0.79	0.66	0.66
674	NASDAQ	ATRO	Wed, Sep 28, 1994	0.75	0.75	0.75	0.75
673	NASDAQ	ATRO	Mon, Sep 26, 1994	0.71	0.71	0.71	0.71
672	NASDAQ	ATRO	Thu, Sep 22, 1994	0.75	0.79	0.75	0.79
671	NASDAQ	ATRO	Wed, Sep 21, 1994	0.79	0.79	0.79	0.79
670	NASDAQ	ATRO	Fri, Sep 16, 1994	0.79	0.79	0.79	0.79
669	NASDAQ	ATRO	Wed, Sep 14, 1994	0.79	0.83	0.79	0.83
668	NASDAQ	ATRO	Mon, Sep 12, 1994	0.79	0.79	0.79	0.79
667	NASDAQ	ATRO	Fri, Sep 9, 1994	0.79	0.79	0.79	0.79
666	NASDAQ	ATRO	Thu, Sep 8, 1994	0.79	0.79	0.79	0.79
665	NASDAQ	ATRO	Tue, Sep 6, 1994	0.79	0.79	0.79	0.79
664	NASDAQ	ATRO	Thu, Sep 1, 1994	0.79	0.79	0.79	0.79
663	NASDAQ	ATRO	Wed, Aug 31, 1994	0.79	0.79	0.79	0.79
662	NASDAQ	ATRO	Tue, Aug 30, 1994	0.79	0.79	0.79	0.79
661	NASDAQ	ATRO	Mon, Aug 29, 1994	0.79	0.79	0.79	0.79
660	NASDAQ	ATRO	Fri, Aug 26, 1994	0.79	0.79	0.79	0.79
659	NASDAQ	ATRO	Thu, Aug 25, 1994	0.79	0.79	0.79	0.79
658	NASDAQ	ATRO	Wed, Aug 24, 1994	0.79	0.79	0.79	0.79
657	NASDAQ	ATRO	Mon, Aug 22, 1994	0.79	0.79	0.79	0.79
656	NASDAQ	ATRO	Fri, Aug 19, 1994	0.79	0.83	0.79	0.83
655	NASDAQ	ATRO	Wed, Aug 17, 1994	0.79	0.79	0.79	0.79
654	NASDAQ	ATRO	Tue, Aug 16, 1994	0.83	0.83	0.83	0.83
653	NASDAQ	ATRO	Mon, Aug 15, 1994	0.79	0.83	0.79	0.83
652	NASDAQ	ATRO	Fri, Aug 12, 1994	0.79	0.83	0.79	0.83
651	NASDAQ	ATRO	Thu, Aug 11, 1994	0.79	0.79	0.79	0.79
650	NASDAQ	ATRO	Wed, Aug 10, 1994	0.79	0.79	0.79	0.79
649	NASDAQ	ATRO	Tue, Aug 9, 1994	0.87	0.87	0.79	0.79
648	NASDAQ	ATRO	Mon, Aug 8, 1994	0.79	0.83	0.79	0.79
647	NASDAQ	ATRO	Fri, Aug 5, 1994	0.79	0.79	0.79	0.79
646	NASDAQ	ATRO	Thu, Aug 4, 1994	0.79	0.83	0.79	0.83
645	NASDAQ	ATRO	Wed, Aug 3, 1994	0.79	0.79	0.79	0.79
644	NASDAQ	ATRO	Tue, Aug 2, 1994	0.79	0.83	0.79	0.79
643	NASDAQ	ATRO	Mon, Aug 1, 1994	0.79	0.83	0.79	0.79
642	NASDAQ	ATRO	Fri, Jul 29, 1994	0.79	0.83	0.79	0.79
641	NASDAQ	ATRO	Thu, Jul 28, 1994	0.79	0.79	0.79	0.79
640	NASDAQ	ATRO	Wed, Jul 27, 1994	0.79	0.79	0.79	0.79
639	NASDAQ	ATRO	Tue, Jul 26, 1994	0.79	0.79	0.79	0.79
638	NASDAQ	ATRO	Mon, Jul 25, 1994	0.79	0.79	0.79	0.79
637	NASDAQ	ATRO	Fri, Jul 22, 1994	0.87	0.87	0.75	0.79
636	NASDAQ	ATRO	Thu, Jul 21, 1994	0.83	0.83	0.83	0.83
635	NASDAQ	ATRO	Wed, Jul 20, 1994	0.79	0.83	0.79	0.83
634	NASDAQ	ATRO	Tue, Jul 19, 1994	0.79	0.79	0.79	0.79
633	NASDAQ	ATRO	Mon, Jul 18, 1994	0.79	0.79	0.79	0.79
632	NASDAQ	ATRO	Fri, Jul 15, 1994	0.79	0.79	0.79	0.79
631	NASDAQ	ATRO	Thu, Jul 14, 1994	0.79	0.87	0.79	0.83
630	NASDAQ	ATRO	Wed, Jul 13, 1994	0.79	0.79	0.79	0.79
629	NASDAQ	ATRO	Tue, Jul 12, 1994	0.79	0.79	0.79	0.79
628	NASDAQ	ATRO	Mon, Jul 11, 1994	0.79	0.79	0.79	0.79
627	NASDAQ	ATRO	Wed, Jul 6, 1994	0.79	0.79	0.79	0.79
626	NASDAQ	ATRO	Tue, Jul 5, 1994	0.79	0.83	0.79	0.83
625	NASDAQ	ATRO	Fri, Jul 1, 1994	0.79	0.79	0.79	0.79
624	NASDAQ	ATRO	Thu, Jun 30, 1994	0.79	0.79	0.79	0.79
623	NASDAQ	ATRO	Wed, Jun 29, 1994	0.80	0.80	0.79	0.79
622	NASDAQ	ATRO	Tue, Jun 28, 1994	0.79	0.83	0.79	0.79
621	NASDAQ	ATRO	Mon, Jun 27, 1994	0.79	0.79	0.79	0.79
620	NASDAQ	ATRO	Fri, Jun 24, 1994	0.79	0.79	0.79	0.79
619	NASDAQ	ATRO	Thu, Jun 23, 1994	0.79	0.79	0.79	0.79
618	NASDAQ	ATRO	Wed, Jun 22, 1994	0.83	0.83	0.79	0.79
617	NASDAQ	ATRO	Fri, Jun 17, 1994	0.83	0.83	0.79	0.79
616	NASDAQ	ATRO	Thu, Jun 16, 1994	0.79	0.83	0.79	0.83
615	NASDAQ	ATRO	Wed, Jun 15, 1994	0.87	0.87	0.87	0.87
614	NASDAQ	ATRO	Mon, Jun 13, 1994	0.83	0.83	0.83	0.83
613	NASDAQ	ATRO	Wed, Jun 8, 1994	0.87	0.87	0.87	0.87
612	NASDAQ	ATRO	Tue, Jun 7, 1994	0.79	0.83	0.79	0.79
611	NASDAQ	ATRO	Mon, Jun 6, 1994	0.79	0.87	0.79	0.87
610	NASDAQ	ATRO	Fri, Jun 3, 1994	0.87	0.87	0.83	0.83
609	NASDAQ	ATRO	Thu, Jun 2, 1994	0.83	0.83	0.83	0.83
608	NASDAQ	ATRO	Wed, Jun 1, 1994	0.83	0.83	0.79	0.79
607	NASDAQ	ATRO	Tue, May 31, 1994	0.79	0.79	0.79	0.79
606	NASDAQ	ATRO	Fri, May 27, 1994	0.79	0.79	0.79	0.79
605	NASDAQ	ATRO	Thu, May 26, 1994	0.79	0.83	0.79	0.79
604	NASDAQ	ATRO	Wed, May 25, 1994	0.79	0.79	0.79	0.79
603	NASDAQ	ATRO	Tue, May 24, 1994	0.79	0.79	0.79	0.79
602	NASDAQ	ATRO	Mon, May 23, 1994	0.79	0.83	0.79	0.79
601	NASDAQ	ATRO	Fri, May 20, 1994	0.83	0.83	0.79	0.83
600	NASDAQ	ATRO	Thu, May 19, 1994	0.79	0.79	0.79	0.79
599	NASDAQ	ATRO	Wed, May 18, 1994	0.87	0.87	0.79	0.79
598	NASDAQ	ATRO	Tue, May 17, 1994	0.79	0.79	0.79	0.79
597	NASDAQ	ATRO	Mon, May 16, 1994	0.83	0.87	0.83	0.83
596	NASDAQ	ATRO	Fri, May 13, 1994	0.79	0.83	0.79	0.79
595	NASDAQ	ATRO	Thu, May 12, 1994	0.79	0.79	0.79	0.79
594	NASDAQ	ATRO	Wed, May 11, 1994	0.79	0.79	0.79	0.79
593	NASDAQ	ATRO	Mon, May 9, 1994	0.79	0.79	0.79	0.79
592	NASDAQ	ATRO	Fri, May 6, 1994	0.87	0.87	0.87	0.87
591	NASDAQ	ATRO	Thu, May 5, 1994	0.79	0.79	0.79	0.79
590	NASDAQ	ATRO	Tue, May 3, 1994	0.79	0.87	0.79	0.87
589	NASDAQ	ATRO	Mon, May 2, 1994	0.79	0.87	0.79	0.87
588	NASDAQ	ATRO	Fri, Apr 29, 1994	0.79	0.79	0.79	0.79
587	NASDAQ	ATRO	Thu, Apr 28, 1994	0.79	0.79	0.79	0.79
586	NASDAQ	ATRO	Tue, Apr 26, 1994	0.79	0.87	0.79	0.87
585	NASDAQ	ATRO	Mon, Apr 25, 1994	0.79	0.79	0.79	0.79
584	NASDAQ	ATRO	Fri, Apr 22, 1994	0.91	0.95	0.91	0.95
583	NASDAQ	ATRO	Thu, Apr 21, 1994	0.87	0.87	0.87	0.87
582	NASDAQ	ATRO	Wed, Apr 20, 1994	0.95	0.95	0.87	0.95
581	NASDAQ	ATRO	Tue, Apr 19, 1994	0.87	0.87	0.87	0.87
580	NASDAQ	ATRO	Mon, Apr 18, 1994	0.95	0.95	0.91	0.91
579	NASDAQ	ATRO	Wed, Apr 13, 1994	0.87	0.87	0.87	0.87
578	NASDAQ	ATRO	Tue, Apr 12, 1994	0.87	0.91	0.87	0.91
577	NASDAQ	ATRO	Mon, Apr 11, 1994	0.87	0.91	0.87	0.91
576	NASDAQ	ATRO	Fri, Apr 8, 1994	0.87	0.87	0.87	0.87
575	NASDAQ	ATRO	Thu, Apr 7, 1994	0.87	0.91	0.87	0.87
574	NASDAQ	ATRO	Wed, Apr 6, 1994	0.87	0.87	0.87	0.87
573	NASDAQ	ATRO	Tue, Apr 5, 1994	0.91	0.91	0.87	0.87
572	NASDAQ	ATRO	Mon, Apr 4, 1994	0.83	0.91	0.83	0.83
571	NASDAQ	ATRO	Thu, Mar 31, 1994	0.83	0.91	0.83	0.91
570	NASDAQ	ATRO	Wed, Mar 30, 1994	0.83	0.83	0.83	0.83
569	NASDAQ	ATRO	Mon, Mar 28, 1994	0.83	0.83	0.83	0.83
568	NASDAQ	ATRO	Fri, Mar 25, 1994	0.83	0.91	0.83	0.91
567	NASDAQ	ATRO	Thu, Mar 24, 1994	0.91	0.91	0.91	0.91
566	NASDAQ	ATRO	Wed, Mar 23, 1994	0.83	0.91	0.83	0.83
565	NASDAQ	ATRO	Tue, Mar 22, 1994	0.91	0.91	0.91	0.91
564	NASDAQ	ATRO	Mon, Mar 21, 1994	0.83	0.83	0.83	0.83
563	NASDAQ	ATRO	Fri, Mar 18, 1994	0.83	0.91	0.83	0.83
562	NASDAQ	ATRO	Tue, Mar 15, 1994	0.83	0.83	0.83	0.83
561	NASDAQ	ATRO	Mon, Mar 14, 1994	0.87	0.87	0.87	0.87
560	NASDAQ	ATRO	Fri, Mar 11, 1994	0.83	0.95	0.83	0.95
559	NASDAQ	ATRO	Wed, Mar 9, 1994	0.83	0.83	0.83	0.83
558	NASDAQ	ATRO	Tue, Mar 8, 1994	0.95	0.95	0.83	0.95
557	NASDAQ	ATRO	Mon, Mar 7, 1994	0.95	0.95	0.83	0.83
556	NASDAQ	ATRO	Fri, Mar 4, 1994	0.83	0.83	0.83	0.83
555	NASDAQ	ATRO	Wed, Mar 2, 1994	0.95	0.95	0.83	0.83
554	NASDAQ	ATRO	Tue, Mar 1, 1994	0.83	0.83	0.83	0.83
553	NASDAQ	ATRO	Mon, Feb 28, 1994	0.83	0.95	0.83	0.83
552	NASDAQ	ATRO	Thu, Feb 24, 1994	0.83	0.83	0.83	0.83
551	NASDAQ	ATRO	Tue, Feb 22, 1994	0.87	0.87	0.87	0.87
550	NASDAQ	ATRO	Fri, Feb 18, 1994	0.95	0.95	0.87	0.87
549	NASDAQ	ATRO	Thu, Feb 17, 1994	0.95	0.95	0.87	0.95
548	NASDAQ	ATRO	Wed, Feb 16, 1994	0.87	0.87	0.87	0.87
547	NASDAQ	ATRO	Tue, Feb 15, 1994	0.95	0.95	0.95	0.95
546	NASDAQ	ATRO	Mon, Feb 14, 1994	0.95	0.95	0.87	0.87
545	NASDAQ	ATRO	Fri, Feb 11, 1994	0.87	0.87	0.87	0.87
544	NASDAQ	ATRO	Thu, Feb 10, 1994	0.87	0.87	0.87	0.87
543	NASDAQ	ATRO	Wed, Feb 9, 1994	0.95	0.95	0.95	0.95
542	NASDAQ	ATRO	Tue, Feb 8, 1994	0.83	0.95	0.83	0.87
541	NASDAQ	ATRO	Mon, Feb 7, 1994	0.91	0.91	0.87	0.87
540	NASDAQ	ATRO	Fri, Feb 4, 1994	0.91	1.04	0.91	1.04
539	NASDAQ	ATRO	Thu, Feb 3, 1994	0.91	0.91	0.91	0.91
538	NASDAQ	ATRO	Wed, Feb 2, 1994	0.91	1.04	0.91	1.04
537	NASDAQ	ATRO	Tue, Feb 1, 1994	0.95	1.04	0.91	1.04
536	NASDAQ	ATRO	Mon, Jan 31, 1994	0.91	1.04	0.91	1.04
535	NASDAQ	ATRO	Fri, Jan 28, 1994	0.87	0.91	0.87	0.91
534	NASDAQ	ATRO	Tue, Jan 25, 1994	0.87	0.91	0.87	0.91
533	NASDAQ	ATRO	Mon, Jan 24, 1994	0.87	0.89	0.87	0.89
532	NASDAQ	ATRO	Fri, Jan 21, 1994	0.87	0.87	0.87	0.87
531	NASDAQ	ATRO	Thu, Jan 20, 1994	0.87	1.00	0.87	1.00
530	NASDAQ	ATRO	Wed, Jan 19, 1994	1.00	1.00	1.00	1.00
529	NASDAQ	ATRO	Fri, Jan 14, 1994	1.00	1.00	1.00	1.00
528	NASDAQ	ATRO	Thu, Jan 13, 1994	1.00	1.00	0.87	1.00
527	NASDAQ	ATRO	Wed, Jan 12, 1994	0.87	0.93	0.87	0.93
526	NASDAQ	ATRO	Tue, Jan 11, 1994	1.00	1.00	1.00	1.00
525	NASDAQ	ATRO	Mon, Jan 10, 1994	0.95	0.95	0.87	0.87
524	NASDAQ	ATRO	Fri, Jan 7, 1994	0.87	0.95	0.87	0.95
523	NASDAQ	ATRO	Thu, Jan 6, 1994	0.95	0.95	0.95	0.95
522	NASDAQ	ATRO	Wed, Jan 5, 1994	0.87	0.95	0.87	0.91
521	NASDAQ	ATRO	Tue, Jan 4, 1994	0.87	0.87	0.87	0.87
520	NASDAQ	ATRO	Mon, Jan 3, 1994	0.87	0.95	0.87	0.95
519	NASDAQ	ATRO	Fri, Dec 31, 1993	0.87	1.00	0.87	1.00
518	NASDAQ	ATRO	Thu, Dec 30, 1993	0.91	1.00	0.87	1.00
517	NASDAQ	ATRO	Wed, Dec 29, 1993	0.91	1.00	0.91	0.95
516	NASDAQ	ATRO	Tue, Dec 28, 1993	1.00	1.00	0.95	0.95
515	NASDAQ	ATRO	Mon, Dec 27, 1993	0.95	1.00	0.95	1.00
514	NASDAQ	ATRO	Thu, Dec 23, 1993	0.95	1.00	0.95	1.00
513	NASDAQ	ATRO	Wed, Dec 22, 1993	1.04	1.08	0.95	0.95
512	NASDAQ	ATRO	Tue, Dec 21, 1993	0.95	0.95	0.95	0.95
511	NASDAQ	ATRO	Mon, Dec 20, 1993	0.95	1.00	0.95	1.00
510	NASDAQ	ATRO	Fri, Dec 17, 1993	0.95	0.95	0.95	0.95
509	NASDAQ	ATRO	Thu, Dec 16, 1993	1.00	1.00	0.95	0.95
508	NASDAQ	ATRO	Wed, Dec 15, 1993	1.08	1.08	0.95	1.00
507	NASDAQ	ATRO	Tue, Dec 14, 1993	1.00	1.08	0.95	1.00
506	NASDAQ	ATRO	Mon, Dec 13, 1993	1.08	1.08	1.00	1.00
505	NASDAQ	ATRO	Fri, Dec 10, 1993	1.00	1.08	1.00	1.04
504	NASDAQ	ATRO	Thu, Dec 9, 1993	1.00	1.08	1.00	1.08
503	NASDAQ	ATRO	Wed, Dec 8, 1993	1.08	1.08	1.08	1.08
502	NASDAQ	ATRO	Tue, Dec 7, 1993	1.04	1.08	1.00	1.00
501	NASDAQ	ATRO	Mon, Dec 6, 1993	0.95	1.04	0.95	1.04
500	NASDAQ	ATRO	Fri, Dec 3, 1993	1.04	1.04	0.95	0.95
499	NASDAQ	ATRO	Thu, Dec 2, 1993	1.04	1.04	1.04	1.04
498	NASDAQ	ATRO	Wed, Dec 1, 1993	1.04	1.04	1.04	1.04
497	NASDAQ	ATRO	Tue, Nov 30, 1993	1.00	1.04	1.00	1.04
496	NASDAQ	ATRO	Mon, Nov 29, 1993	1.08	1.08	0.95	0.95
495	NASDAQ	ATRO	Fri, Nov 26, 1993	0.95	0.95	0.95	0.95
494	NASDAQ	ATRO	Wed, Nov 24, 1993	1.00	1.08	0.95	0.98
493	NASDAQ	ATRO	Tue, Nov 23, 1993	1.00	1.00	0.95	0.95
492	NASDAQ	ATRO	Mon, Nov 22, 1993	0.95	1.08	0.95	0.95
491	NASDAQ	ATRO	Fri, Nov 19, 1993	0.95	1.08	0.95	1.04
490	NASDAQ	ATRO	Thu, Nov 18, 1993	1.00	1.08	1.00	1.08
489	NASDAQ	ATRO	Wed, Nov 17, 1993	1.00	1.08	1.00	1.08
488	NASDAQ	ATRO	Tue, Nov 16, 1993	1.08	1.08	1.00	1.00
487	NASDAQ	ATRO	Mon, Nov 15, 1993	1.08	1.08	1.00	1.00
486	NASDAQ	ATRO	Fri, Nov 12, 1993	1.08	1.08	1.00	1.08
485	NASDAQ	ATRO	Thu, Nov 11, 1993	1.08	1.08	1.00	1.08
484	NASDAQ	ATRO	Wed, Nov 10, 1993	1.04	1.08	1.00	1.08
483	NASDAQ	ATRO	Tue, Nov 9, 1993	1.04	1.08	0.95	1.04
482	NASDAQ	ATRO	Mon, Nov 8, 1993	1.00	1.04	0.91	1.04
481	NASDAQ	ATRO	Fri, Nov 5, 1993	1.00	1.00	0.87	0.95
480	NASDAQ	ATRO	Thu, Nov 4, 1993	0.95	0.95	0.87	0.87
479	NASDAQ	ATRO	Wed, Nov 3, 1993	0.87	0.95	0.87	0.91
478	NASDAQ	ATRO	Tue, Nov 2, 1993	0.87	0.95	0.87	0.91
477	NASDAQ	ATRO	Mon, Nov 1, 1993	1.00	1.00	0.95	0.95
476	NASDAQ	ATRO	Fri, Oct 29, 1993	1.00	1.00	0.91	0.93
475	NASDAQ	ATRO	Thu, Oct 28, 1993	0.91	1.00	0.87	0.91
474	NASDAQ	ATRO	Wed, Oct 27, 1993	0.87	0.91	0.83	0.91
473	NASDAQ	ATRO	Tue, Oct 26, 1993	0.75	0.83	0.75	0.83
472	NASDAQ	ATRO	Mon, Oct 25, 1993	0.75	0.83	0.75	0.81
471	NASDAQ	ATRO	Fri, Oct 22, 1993	0.75	0.75	0.75	0.75
470	NASDAQ	ATRO	Thu, Oct 21, 1993	0.83	0.83	0.81	0.83
469	NASDAQ	ATRO	Wed, Oct 20, 1993	0.83	0.83	0.79	0.83
468	NASDAQ	ATRO	Tue, Oct 19, 1993	0.83	0.83	0.83	0.83
467	NASDAQ	ATRO	Mon, Oct 18, 1993	0.79	0.83	0.79	0.83
466	NASDAQ	ATRO	Fri, Oct 15, 1993	0.79	0.79	0.79	0.79
465	NASDAQ	ATRO	Wed, Oct 13, 1993	0.79	0.79	0.79	0.79
464	NASDAQ	ATRO	Fri, Oct 8, 1993	0.79	0.79	0.79	0.79
463	NASDAQ	ATRO	Thu, Oct 7, 1993	0.87	0.87	0.87	0.87
462	NASDAQ	ATRO	Tue, Oct 5, 1993	0.79	0.87	0.79	0.87
461	NASDAQ	ATRO	Mon, Oct 4, 1993	0.83	0.83	0.81	0.81
460	NASDAQ	ATRO	Fri, Oct 1, 1993	0.79	0.79	0.79	0.79
459	NASDAQ	ATRO	Thu, Sep 30, 1993	0.79	0.79	0.79	0.79
458	NASDAQ	ATRO	Wed, Sep 29, 1993	0.87	0.87	0.87	0.87
457	NASDAQ	ATRO	Tue, Sep 28, 1993	0.83	0.87	0.79	0.79
456	NASDAQ	ATRO	Thu, Sep 23, 1993	0.79	0.83	0.79	0.83
455	NASDAQ	ATRO	Wed, Sep 22, 1993	0.83	0.83	0.75	0.75
454	NASDAQ	ATRO	Tue, Sep 21, 1993	0.79	0.79	0.79	0.79
453	NASDAQ	ATRO	Mon, Sep 20, 1993	0.75	0.75	0.75	0.75
452	NASDAQ	ATRO	Fri, Sep 17, 1993	0.83	0.83	0.75	0.79
451	NASDAQ	ATRO	Thu, Sep 16, 1993	0.83	0.83	0.83	0.83
450	NASDAQ	ATRO	Wed, Sep 15, 1993	0.75	0.83	0.75	0.83
449	NASDAQ	ATRO	Tue, Sep 14, 1993	0.75	0.75	0.75	0.75
448	NASDAQ	ATRO	Wed, Sep 8, 1993	0.75	0.75	0.75	0.75
447	NASDAQ	ATRO	Thu, Sep 2, 1993	0.83	0.83	0.75	0.75
446	NASDAQ	ATRO	Wed, Sep 1, 1993	0.75	0.79	0.75	0.79
445	NASDAQ	ATRO	Tue, Aug 31, 1993	0.75	0.79	0.75	0.79
444	NASDAQ	ATRO	Mon, Aug 30, 1993	0.75	0.75	0.75	0.75
443	NASDAQ	ATRO	Thu, Aug 26, 1993	0.75	0.75	0.75	0.75
442	NASDAQ	ATRO	Wed, Aug 25, 1993	0.75	0.75	0.75	0.75
441	NASDAQ	ATRO	Mon, Aug 23, 1993	0.75	0.75	0.75	0.75
440	NASDAQ	ATRO	Fri, Aug 20, 1993	0.83	0.83	0.71	0.71
439	NASDAQ	ATRO	Wed, Aug 18, 1993	0.71	0.75	0.71	0.71
438	NASDAQ	ATRO	Mon, Aug 16, 1993	0.71	0.71	0.71	0.71
437	NASDAQ	ATRO	Fri, Aug 13, 1993	0.83	0.83	0.77	0.77
436	NASDAQ	ATRO	Wed, Aug 11, 1993	0.75	0.79	0.71	0.77
435	NASDAQ	ATRO	Tue, Aug 10, 1993	0.75	0.79	0.75	0.79
434	NASDAQ	ATRO	Mon, Aug 9, 1993	0.79	0.81	0.79	0.79
433	NASDAQ	ATRO	Fri, Aug 6, 1993	0.79	0.79	0.79	0.79
432	NASDAQ	ATRO	Thu, Aug 5, 1993	0.79	0.83	0.79	0.83
431	NASDAQ	ATRO	Tue, Aug 3, 1993	0.79	0.87	0.79	0.79
430	NASDAQ	ATRO	Mon, Aug 2, 1993	0.79	0.81	0.79	0.79
429	NASDAQ	ATRO	Fri, Jul 30, 1993	0.79	0.87	0.79	0.79
428	NASDAQ	ATRO	Thu, Jul 29, 1993	0.79	0.87	0.79	0.87
427	NASDAQ	ATRO	Wed, Jul 28, 1993	0.79	0.79	0.79	0.79
426	NASDAQ	ATRO	Tue, Jul 27, 1993	0.83	0.83	0.83	0.83
425	NASDAQ	ATRO	Mon, Jul 26, 1993	0.83	0.83	0.77	0.77
424	NASDAQ	ATRO	Fri, Jul 23, 1993	0.79	0.79	0.77	0.79
423	NASDAQ	ATRO	Wed, Jul 21, 1993	0.83	0.83	0.75	0.83
422	NASDAQ	ATRO	Tue, Jul 20, 1993	0.75	0.83	0.75	0.83
421	NASDAQ	ATRO	Mon, Jul 19, 1993	0.75	0.83	0.75	0.83
420	NASDAQ	ATRO	Fri, Jul 16, 1993	0.75	0.75	0.75	0.75
419	NASDAQ	ATRO	Thu, Jul 15, 1993	0.75	0.75	0.75	0.75
418	NASDAQ	ATRO	Wed, Jul 14, 1993	0.75	0.75	0.75	0.75
417	NASDAQ	ATRO	Tue, Jul 13, 1993	0.75	0.79	0.75	0.79
416	NASDAQ	ATRO	Mon, Jul 12, 1993	0.75	0.83	0.75	0.83
415	NASDAQ	ATRO	Fri, Jul 9, 1993	0.77	0.77	0.77	0.77
414	NASDAQ	ATRO	Thu, Jul 8, 1993	0.75	0.75	0.75	0.75
413	NASDAQ	ATRO	Wed, Jul 7, 1993	0.75	0.77	0.75	0.77
412	NASDAQ	ATRO	Tue, Jul 6, 1993	0.75	0.75	0.75	0.75
411	NASDAQ	ATRO	Fri, Jul 2, 1993	0.75	0.79	0.75	0.75
410	NASDAQ	ATRO	Thu, Jul 1, 1993	0.83	0.83	0.75	0.75
409	NASDAQ	ATRO	Wed, Jun 30, 1993	0.83	0.85	0.75	0.83
408	NASDAQ	ATRO	Tue, Jun 29, 1993	0.83	0.83	0.83	0.83
407	NASDAQ	ATRO	Mon, Jun 28, 1993	0.83	0.83	0.83	0.83
406	NASDAQ	ATRO	Fri, Jun 25, 1993	0.83	0.85	0.83	0.85
405	NASDAQ	ATRO	Thu, Jun 24, 1993	0.87	0.87	0.83	0.83
404	NASDAQ	ATRO	Wed, Jun 23, 1993	0.83	0.83	0.83	0.83
403	NASDAQ	ATRO	Tue, Jun 22, 1993	0.83	0.91	0.83	0.91
402	NASDAQ	ATRO	Mon, Jun 21, 1993	0.91	0.91	0.91	0.91
401	NASDAQ	ATRO	Fri, Jun 18, 1993	0.83	0.83	0.83	0.83
400	NASDAQ	ATRO	Thu, Jun 17, 1993	0.83	0.87	0.83	0.87
399	NASDAQ	ATRO	Wed, Jun 16, 1993	0.91	0.91	0.91	0.91
398	NASDAQ	ATRO	Tue, Jun 15, 1993	0.83	0.91	0.83	0.87
397	NASDAQ	ATRO	Mon, Jun 14, 1993	0.83	0.91	0.83	0.83
396	NASDAQ	ATRO	Fri, Jun 11, 1993	0.83	0.87	0.83	0.87
395	NASDAQ	ATRO	Thu, Jun 10, 1993	0.87	0.87	0.83	0.87
394	NASDAQ	ATRO	Wed, Jun 9, 1993	0.79	0.79	0.79	0.79
393	NASDAQ	ATRO	Tue, Jun 8, 1993	0.79	0.79	0.79	0.79
392	NASDAQ	ATRO	Mon, Jun 7, 1993	0.79	0.79	0.79	0.79
391	NASDAQ	ATRO	Fri, Jun 4, 1993	0.79	0.87	0.79	0.87
390	NASDAQ	ATRO	Wed, Jun 2, 1993	0.79	0.79	0.79	0.79
389	NASDAQ	ATRO	Tue, Jun 1, 1993	0.79	0.79	0.79	0.79
388	NASDAQ	ATRO	Fri, May 28, 1993	0.87	0.87	0.83	0.83
387	NASDAQ	ATRO	Thu, May 27, 1993	0.79	0.79	0.79	0.79
386	NASDAQ	ATRO	Fri, May 21, 1993	0.79	0.79	0.79	0.79
385	NASDAQ	ATRO	Thu, May 20, 1993	0.79	0.87	0.79	0.83
384	NASDAQ	ATRO	Wed, May 19, 1993	0.79	0.79	0.79	0.79
383	NASDAQ	ATRO	Tue, May 18, 1993	0.79	0.87	0.79	0.83
382	NASDAQ	ATRO	Fri, May 14, 1993	0.87	0.87	0.79	0.83
381	NASDAQ	ATRO	Thu, May 13, 1993	0.79	0.79	0.79	0.79
380	NASDAQ	ATRO	Wed, May 12, 1993	0.83	0.87	0.79	0.83
379	NASDAQ	ATRO	Tue, May 11, 1993	0.79	0.87	0.79	0.83
378	NASDAQ	ATRO	Mon, May 10, 1993	0.79	0.79	0.79	0.79
377	NASDAQ	ATRO	Thu, May 6, 1993	0.79	0.79	0.79	0.79
376	NASDAQ	ATRO	Wed, May 5, 1993	0.79	0.79	0.79	0.79
375	NASDAQ	ATRO	Mon, May 3, 1993	0.91	0.91	0.79	0.83
374	NASDAQ	ATRO	Wed, Apr 28, 1993	0.83	0.87	0.79	0.85
373	NASDAQ	ATRO	Tue, Apr 27, 1993	0.75	0.75	0.71	0.71
372	NASDAQ	ATRO	Mon, Apr 26, 1993	0.81	0.83	0.79	0.83
371	NASDAQ	ATRO	Fri, Apr 23, 1993	0.87	0.87	0.83	0.83
370	NASDAQ	ATRO	Thu, Apr 22, 1993	0.81	0.89	0.81	0.87
369	NASDAQ	ATRO	Wed, Apr 21, 1993	0.87	0.87	0.81	0.87
368	NASDAQ	ATRO	Tue, Apr 20, 1993	0.83	0.83	0.79	0.81
367	NASDAQ	ATRO	Mon, Apr 19, 1993	0.79	0.79	0.79	0.79
366	NASDAQ	ATRO	Fri, Apr 16, 1993	0.79	0.83	0.79	0.83
365	NASDAQ	ATRO	Thu, Apr 15, 1993	0.75	0.83	0.75	0.83
364	NASDAQ	ATRO	Wed, Apr 14, 1993	0.75	0.75	0.75	0.75
363	NASDAQ	ATRO	Tue, Apr 13, 1993	0.79	0.81	0.79	0.79
362	NASDAQ	ATRO	Mon, Apr 12, 1993	0.79	0.79	0.79	0.79
361	NASDAQ	ATRO	Thu, Apr 8, 1993	0.75	0.83	0.75	0.81
360	NASDAQ	ATRO	Wed, Apr 7, 1993	0.83	0.83	0.75	0.75
359	NASDAQ	ATRO	Mon, Apr 5, 1993	0.75	0.75	0.75	0.75
358	NASDAQ	ATRO	Thu, Apr 1, 1993	0.83	0.83	0.79	0.79
357	NASDAQ	ATRO	Wed, Mar 31, 1993	0.79	0.83	0.79	0.79
356	NASDAQ	ATRO	Mon, Mar 29, 1993	0.79	0.83	0.79	0.83
355	NASDAQ	ATRO	Fri, Mar 26, 1993	0.83	0.83	0.75	0.79
354	NASDAQ	ATRO	Thu, Mar 25, 1993	0.71	0.79	0.71	0.79
353	NASDAQ	ATRO	Wed, Mar 24, 1993	0.71	0.71	0.66	0.68
352	NASDAQ	ATRO	Tue, Mar 23, 1993	0.75	0.75	0.66	0.66
351	NASDAQ	ATRO	Mon, Mar 22, 1993	0.73	0.75	0.71	0.71
350	NASDAQ	ATRO	Fri, Mar 19, 1993	0.71	0.73	0.71	0.71
349	NASDAQ	ATRO	Thu, Mar 18, 1993	0.75	0.75	0.71	0.71
348	NASDAQ	ATRO	Wed, Mar 17, 1993	0.71	0.75	0.71	0.71
347	NASDAQ	ATRO	Tue, Mar 16, 1993	0.79	0.79	0.71	0.75
346	NASDAQ	ATRO	Mon, Mar 15, 1993	0.71	0.71	0.71	0.71
345	NASDAQ	ATRO	Fri, Mar 12, 1993	0.73	0.73	0.73	0.73
344	NASDAQ	ATRO	Thu, Mar 11, 1993	0.71	0.71	0.71	0.71
343	NASDAQ	ATRO	Wed, Mar 10, 1993	0.75	0.75	0.71	0.71
342	NASDAQ	ATRO	Tue, Mar 9, 1993	0.71	0.71	0.71	0.71
341	NASDAQ	ATRO	Mon, Mar 8, 1993	0.71	0.71	0.71	0.71
340	NASDAQ	ATRO	Fri, Mar 5, 1993	0.79	0.79	0.71	0.71
339	NASDAQ	ATRO	Thu, Mar 4, 1993	0.71	0.71	0.71	0.71
338	NASDAQ	ATRO	Wed, Mar 3, 1993	0.79	0.79	0.71	0.71
337	NASDAQ	ATRO	Tue, Mar 2, 1993	0.71	0.71	0.71	0.71
336	NASDAQ	ATRO	Mon, Mar 1, 1993	0.75	0.79	0.75	0.79
335	NASDAQ	ATRO	Fri, Feb 26, 1993	0.79	0.79	0.79	0.79
334	NASDAQ	ATRO	Thu, Feb 25, 1993	0.83	0.83	0.79	0.79
333	NASDAQ	ATRO	Wed, Feb 24, 1993	0.75	0.77	0.75	0.77
332	NASDAQ	ATRO	Tue, Feb 23, 1993	0.83	0.83	0.83	0.83
331	NASDAQ	ATRO	Mon, Feb 22, 1993	0.75	0.77	0.75	0.77
330	NASDAQ	ATRO	Fri, Feb 19, 1993	0.77	0.77	0.77	0.77
329	NASDAQ	ATRO	Wed, Feb 17, 1993	0.75	0.75	0.75	0.75
328	NASDAQ	ATRO	Tue, Feb 16, 1993	0.75	0.75	0.75	0.75
327	NASDAQ	ATRO	Fri, Feb 12, 1993	0.75	0.87	0.75	0.87
326	NASDAQ	ATRO	Thu, Feb 11, 1993	0.87	0.87	0.87	0.87
325	NASDAQ	ATRO	Wed, Feb 10, 1993	0.91	0.91	0.75	0.75
324	NASDAQ	ATRO	Tue, Feb 9, 1993	0.91	0.91	0.83	0.83
323	NASDAQ	ATRO	Mon, Feb 8, 1993	0.91	0.91	0.83	0.83
322	NASDAQ	ATRO	Fri, Feb 5, 1993	0.91	0.91	0.87	0.87
321	NASDAQ	ATRO	Thu, Feb 4, 1993	0.83	0.83	0.83	0.83
320	NASDAQ	ATRO	Wed, Feb 3, 1993	0.83	0.83	0.83	0.83
319	NASDAQ	ATRO	Mon, Feb 1, 1993	0.91	0.91	0.87	0.87
318	NASDAQ	ATRO	Thu, Jan 28, 1993	0.75	0.85	0.75	0.83
317	NASDAQ	ATRO	Wed, Jan 27, 1993	0.83	0.87	0.83	0.87
316	NASDAQ	ATRO	Mon, Jan 25, 1993	0.75	0.75	0.75	0.75
315	NASDAQ	ATRO	Fri, Jan 22, 1993	0.79	0.79	0.79	0.79
314	NASDAQ	ATRO	Thu, Jan 21, 1993	0.83	0.83	0.75	0.75
313	NASDAQ	ATRO	Wed, Jan 20, 1993	0.75	0.79	0.75	0.79
312	NASDAQ	ATRO	Tue, Jan 19, 1993	0.83	0.83	0.83	0.83
311	NASDAQ	ATRO	Mon, Jan 18, 1993	0.83	0.83	0.79	0.79
310	NASDAQ	ATRO	Fri, Jan 15, 1993	0.83	0.83	0.83	0.83
309	NASDAQ	ATRO	Thu, Jan 14, 1993	0.83	0.83	0.75	0.75
308	NASDAQ	ATRO	Wed, Jan 13, 1993	0.83	0.83	0.83	0.83
307	NASDAQ	ATRO	Tue, Jan 12, 1993	0.83	0.83	0.75	0.83
306	NASDAQ	ATRO	Mon, Jan 11, 1993	0.79	0.79	0.79	0.79
305	NASDAQ	ATRO	Fri, Jan 8, 1993	0.79	0.87	0.79	0.87
304	NASDAQ	ATRO	Thu, Jan 7, 1993	0.83	0.83	0.79	0.79
303	NASDAQ	ATRO	Wed, Jan 6, 1993	0.83	0.85	0.83	0.85
302	NASDAQ	ATRO	Mon, Jan 4, 1993	0.91	0.91	0.91	0.91
301	NASDAQ	ATRO	Thu, Dec 31, 1992	0.83	0.87	0.83	0.85
300	NASDAQ	ATRO	Wed, Dec 30, 1992	0.83	0.83	0.83	0.83
299	NASDAQ	ATRO	Tue, Dec 29, 1992	0.83	0.87	0.83	0.85
298	NASDAQ	ATRO	Mon, Dec 28, 1992	0.83	0.87	0.83	0.87
297	NASDAQ	ATRO	Thu, Dec 24, 1992	0.83	0.89	0.83	0.89
296	NASDAQ	ATRO	Wed, Dec 23, 1992	0.91	0.91	0.83	0.83
295	NASDAQ	ATRO	Tue, Dec 22, 1992	0.87	0.87	0.83	0.83
294	NASDAQ	ATRO	Mon, Dec 21, 1992	0.95	0.95	0.87	0.91
293	NASDAQ	ATRO	Fri, Dec 18, 1992	0.87	0.87	0.87	0.87
292	NASDAQ	ATRO	Thu, Dec 17, 1992	0.87	0.91	0.87	0.87
291	NASDAQ	ATRO	Wed, Dec 16, 1992	0.87	0.87	0.87	0.87
290	NASDAQ	ATRO	Tue, Dec 15, 1992	0.87	0.87	0.87	0.87
289	NASDAQ	ATRO	Mon, Dec 14, 1992	0.87	0.87	0.87	0.87
288	NASDAQ	ATRO	Fri, Dec 11, 1992	0.87	0.95	0.87	0.91
287	NASDAQ	ATRO	Thu, Dec 10, 1992	0.87	0.87	0.87	0.87
286	NASDAQ	ATRO	Wed, Dec 9, 1992	0.87	0.91	0.87	0.91
285	NASDAQ	ATRO	Tue, Dec 8, 1992	0.87	0.87	0.87	0.87
284	NASDAQ	ATRO	Mon, Dec 7, 1992	0.87	0.87	0.87	0.87
283	NASDAQ	ATRO	Thu, Dec 3, 1992	0.87	0.91	0.87	0.87
282	NASDAQ	ATRO	Wed, Dec 2, 1992	0.87	0.89	0.87	0.89
281	NASDAQ	ATRO	Tue, Dec 1, 1992	0.91	1.00	0.87	0.87
280	NASDAQ	ATRO	Mon, Nov 30, 1992	0.91	0.91	0.91	0.91
279	NASDAQ	ATRO	Fri, Nov 27, 1992	0.91	0.91	0.91	0.91
278	NASDAQ	ATRO	Wed, Nov 25, 1992	1.00	1.00	0.91	0.91
277	NASDAQ	ATRO	Tue, Nov 24, 1992	0.93	1.00	0.91	0.91
276	NASDAQ	ATRO	Mon, Nov 23, 1992	1.00	1.00	0.91	0.95
275	NASDAQ	ATRO	Fri, Nov 20, 1992	0.91	0.91	0.79	0.91
274	NASDAQ	ATRO	Thu, Nov 19, 1992	0.87	0.91	0.79	0.91
273	NASDAQ	ATRO	Wed, Nov 18, 1992	0.75	0.83	0.75	0.81
272	NASDAQ	ATRO	Tue, Nov 17, 1992	0.79	0.79	0.79	0.79
271	NASDAQ	ATRO	Mon, Nov 16, 1992	0.75	0.79	0.75	0.79
270	NASDAQ	ATRO	Fri, Nov 13, 1992	0.75	0.83	0.75	0.75
269	NASDAQ	ATRO	Thu, Nov 12, 1992	0.75	0.75	0.75	0.75
268	NASDAQ	ATRO	Wed, Nov 11, 1992	0.75	0.81	0.75	0.81
267	NASDAQ	ATRO	Tue, Nov 10, 1992	0.75	0.83	0.75	0.79
266	NASDAQ	ATRO	Mon, Nov 9, 1992	0.75	0.77	0.75	0.77
265	NASDAQ	ATRO	Fri, Nov 6, 1992	0.75	0.83	0.75	0.75
264	NASDAQ	ATRO	Thu, Nov 5, 1992	0.75	0.75	0.75	0.75
263	NASDAQ	ATRO	Wed, Nov 4, 1992	0.75	0.79	0.75	0.75
262	NASDAQ	ATRO	Tue, Nov 3, 1992	0.79	0.79	0.75	0.75
261	NASDAQ	ATRO	Mon, Nov 2, 1992	0.75	0.75	0.75	0.75
260	NASDAQ	ATRO	Fri, Oct 30, 1992	0.83	0.83	0.83	0.83
259	NASDAQ	ATRO	Thu, Oct 29, 1992	0.75	0.75	0.75	0.75
258	NASDAQ	ATRO	Wed, Oct 28, 1992	0.75	0.83	0.75	0.77
257	NASDAQ	ATRO	Tue, Oct 27, 1992	0.75	0.75	0.75	0.75
256	NASDAQ	ATRO	Mon, Oct 26, 1992	0.75	0.83	0.75	0.83
255	NASDAQ	ATRO	Thu, Oct 22, 1992	0.75	0.75	0.75	0.75
254	NASDAQ	ATRO	Wed, Oct 21, 1992	0.79	0.81	0.79	0.79
253	NASDAQ	ATRO	Mon, Oct 19, 1992	0.79	0.79	0.79	0.79
252	NASDAQ	ATRO	Fri, Oct 16, 1992	0.83	0.83	0.79	0.81
251	NASDAQ	ATRO	Thu, Oct 15, 1992	0.81	0.83	0.79	0.79
250	NASDAQ	ATRO	Wed, Oct 14, 1992	0.79	0.79	0.75	0.75
249	NASDAQ	ATRO	Mon, Oct 12, 1992	0.75	0.77	0.75	0.77
248	NASDAQ	ATRO	Fri, Oct 9, 1992	0.75	0.77	0.75	0.77
247	NASDAQ	ATRO	Wed, Oct 7, 1992	0.75	0.77	0.75	0.75
246	NASDAQ	ATRO	Tue, Oct 6, 1992	0.75	0.75	0.75	0.75
245	NASDAQ	ATRO	Mon, Oct 5, 1992	0.75	0.75	0.75	0.75
244	NASDAQ	ATRO	Fri, Oct 2, 1992	0.75	0.75	0.75	0.75
243	NASDAQ	ATRO	Wed, Sep 30, 1992	0.75	0.83	0.75	0.83
242	NASDAQ	ATRO	Tue, Sep 29, 1992	0.79	0.79	0.79	0.79
241	NASDAQ	ATRO	Mon, Sep 28, 1992	0.79	0.79	0.75	0.75
240	NASDAQ	ATRO	Fri, Sep 25, 1992	0.75	0.79	0.75	0.75
239	NASDAQ	ATRO	Wed, Sep 23, 1992	0.71	0.77	0.71	0.77
238	NASDAQ	ATRO	Tue, Sep 22, 1992	0.73	0.73	0.73	0.73
237	NASDAQ	ATRO	Mon, Sep 21, 1992	0.79	0.79	0.71	0.71
236	NASDAQ	ATRO	Fri, Sep 18, 1992	0.79	0.79	0.79	0.79
235	NASDAQ	ATRO	Wed, Sep 16, 1992	0.71	0.71	0.71	0.71
234	NASDAQ	ATRO	Tue, Sep 15, 1992	0.71	0.75	0.71	0.73
233	NASDAQ	ATRO	Mon, Sep 14, 1992	0.68	0.75	0.68	0.71
232	NASDAQ	ATRO	Fri, Sep 11, 1992	0.68	0.68	0.68	0.68
231	NASDAQ	ATRO	Thu, Sep 10, 1992	0.68	0.68	0.68	0.68
230	NASDAQ	ATRO	Tue, Sep 8, 1992	0.68	0.68	0.68	0.68
229	NASDAQ	ATRO	Fri, Sep 4, 1992	0.68	0.68	0.68	0.68
228	NASDAQ	ATRO	Wed, Sep 2, 1992	0.71	0.71	0.71	0.71
227	NASDAQ	ATRO	Tue, Sep 1, 1992	0.68	0.68	0.68	0.68
226	NASDAQ	ATRO	Mon, Aug 31, 1992	0.68	0.68	0.68	0.68
225	NASDAQ	ATRO	Fri, Aug 28, 1992	0.71	0.71	0.71	0.71
224	NASDAQ	ATRO	Thu, Aug 27, 1992	0.68	0.71	0.68	0.68
223	NASDAQ	ATRO	Wed, Aug 26, 1992	0.68	0.68	0.68	0.68
222	NASDAQ	ATRO	Tue, Aug 25, 1992	0.68	0.68	0.68	0.68
221	NASDAQ	ATRO	Mon, Aug 24, 1992	0.68	0.68	0.68	0.68
220	NASDAQ	ATRO	Fri, Aug 21, 1992	0.70	0.75	0.70	0.75
219	NASDAQ	ATRO	Thu, Aug 20, 1992	0.68	0.71	0.68	0.68
218	NASDAQ	ATRO	Wed, Aug 19, 1992	0.68	0.68	0.68	0.68
217	NASDAQ	ATRO	Tue, Aug 18, 1992	0.68	0.71	0.68	0.71
216	NASDAQ	ATRO	Mon, Aug 17, 1992	0.68	0.75	0.68	0.68
215	NASDAQ	ATRO	Fri, Aug 14, 1992	0.68	0.71	0.68	0.68
214	NASDAQ	ATRO	Thu, Aug 13, 1992	0.68	0.71	0.68	0.68
213	NASDAQ	ATRO	Wed, Aug 12, 1992	0.68	0.75	0.68	0.71
212	NASDAQ	ATRO	Tue, Aug 11, 1992	0.68	0.73	0.68	0.73
211	NASDAQ	ATRO	Mon, Aug 10, 1992	0.75	0.75	0.71	0.71
210	NASDAQ	ATRO	Fri, Aug 7, 1992	0.73	0.77	0.71	0.73
209	NASDAQ	ATRO	Thu, Aug 6, 1992	0.75	0.75	0.73	0.73
208	NASDAQ	ATRO	Wed, Aug 5, 1992	0.75	0.75	0.75	0.75
207	NASDAQ	ATRO	Mon, Aug 3, 1992	0.75	0.79	0.75	0.75
206	NASDAQ	ATRO	Thu, Jul 30, 1992	0.77	0.77	0.75	0.75
205	NASDAQ	ATRO	Wed, Jul 29, 1992	0.75	0.75	0.75	0.75
204	NASDAQ	ATRO	Tue, Jul 28, 1992	0.75	0.75	0.75	0.75
203	NASDAQ	ATRO	Fri, Jul 24, 1992	0.79	0.79	0.79	0.79
202	NASDAQ	ATRO	Thu, Jul 23, 1992	0.75	0.75	0.75	0.75
201	NASDAQ	ATRO	Wed, Jul 22, 1992	0.83	0.83	0.75	0.79
200	NASDAQ	ATRO	Mon, Jul 20, 1992	0.83	0.83	0.75	0.75
199	NASDAQ	ATRO	Fri, Jul 17, 1992	0.75	0.79	0.75	0.79
198	NASDAQ	ATRO	Thu, Jul 16, 1992	0.75	0.83	0.75	0.83
197	NASDAQ	ATRO	Wed, Jul 15, 1992	0.75	0.75	0.75	0.75
196	NASDAQ	ATRO	Tue, Jul 14, 1992	0.79	0.79	0.79	0.79
195	NASDAQ	ATRO	Mon, Jul 13, 1992	0.83	0.83	0.75	0.75
194	NASDAQ	ATRO	Fri, Jul 10, 1992	0.75	0.75	0.75	0.75
193	NASDAQ	ATRO	Thu, Jul 9, 1992	0.75	0.83	0.75	0.83
192	NASDAQ	ATRO	Wed, Jul 8, 1992	0.79	0.79	0.79	0.79
191	NASDAQ	ATRO	Tue, Jul 7, 1992	0.83	0.83	0.75	0.75
190	NASDAQ	ATRO	Mon, Jul 6, 1992	0.71	0.75	0.71	0.75
189	NASDAQ	ATRO	Thu, Jul 2, 1992	0.75	0.75	0.75	0.75
188	NASDAQ	ATRO	Wed, Jul 1, 1992	0.75	0.83	0.75	0.83
187	NASDAQ	ATRO	Tue, Jun 30, 1992	0.71	0.83	0.71	0.83
186	NASDAQ	ATRO	Mon, Jun 29, 1992	0.71	0.71	0.71	0.71
185	NASDAQ	ATRO	Fri, Jun 26, 1992	0.83	0.83	0.79	0.79
184	NASDAQ	ATRO	Thu, Jun 25, 1992	0.87	0.87	0.71	0.71
183	NASDAQ	ATRO	Wed, Jun 24, 1992	0.87	0.87	0.87	0.87
182	NASDAQ	ATRO	Mon, Jun 22, 1992	0.79	0.83	0.79	0.83
181	NASDAQ	ATRO	Fri, Jun 19, 1992	0.91	0.91	0.79	0.79
180	NASDAQ	ATRO	Thu, Jun 18, 1992	0.91	0.91	0.87	0.91
179	NASDAQ	ATRO	Wed, Jun 17, 1992	0.91	0.91	0.79	0.79
178	NASDAQ	ATRO	Tue, Jun 16, 1992	0.75	0.75	0.75	0.75
177	NASDAQ	ATRO	Mon, Jun 15, 1992	0.75	0.75	0.75	0.75
176	NASDAQ	ATRO	Fri, Jun 12, 1992	0.75	0.79	0.75	0.76
175	NASDAQ	ATRO	Thu, Jun 11, 1992	0.79	0.79	0.66	0.75
174	NASDAQ	ATRO	Tue, Jun 9, 1992	0.73	0.75	0.66	0.75
173	NASDAQ	ATRO	Mon, Jun 8, 1992	0.66	0.66	0.66	0.66
172	NASDAQ	ATRO	Fri, Jun 5, 1992	0.75	0.79	0.66	0.79
171	NASDAQ	ATRO	Thu, Jun 4, 1992	0.75	0.79	0.71	0.79
170	NASDAQ	ATRO	Wed, Jun 3, 1992	0.87	0.87	0.75	0.75
169	NASDAQ	ATRO	Tue, Jun 2, 1992	0.75	0.79	0.75	0.79
168	NASDAQ	ATRO	Mon, Jun 1, 1992	0.75	0.79	0.75	0.79
167	NASDAQ	ATRO	Fri, May 29, 1992	0.79	0.87	0.79	0.79
166	NASDAQ	ATRO	Wed, May 27, 1992	0.79	0.79	0.79	0.79
165	NASDAQ	ATRO	Tue, May 26, 1992	0.79	0.79	0.79	0.79
164	NASDAQ	ATRO	Thu, May 21, 1992	0.87	0.87	0.87	0.87
163	NASDAQ	ATRO	Tue, May 19, 1992	0.79	0.85	0.79	0.85
162	NASDAQ	ATRO	Mon, May 18, 1992	0.79	0.79	0.79	0.79
161	NASDAQ	ATRO	Fri, May 15, 1992	0.87	0.87	0.79	0.79
160	NASDAQ	ATRO	Thu, May 14, 1992	0.75	0.87	0.75	0.83
159	NASDAQ	ATRO	Wed, May 13, 1992	0.87	0.87	0.87	0.87
158	NASDAQ	ATRO	Tue, May 12, 1992	0.83	0.91	0.83	0.87
157	NASDAQ	ATRO	Mon, May 11, 1992	0.83	0.95	0.83	0.87
156	NASDAQ	ATRO	Fri, May 8, 1992	0.87	0.91	0.87	0.91
155	NASDAQ	ATRO	Thu, May 7, 1992	0.95	0.95	0.87	0.91
154	NASDAQ	ATRO	Wed, May 6, 1992	0.93	0.95	0.93	0.95
153	NASDAQ	ATRO	Tue, May 5, 1992	1.00	1.00	0.87	0.95
152	NASDAQ	ATRO	Mon, May 4, 1992	0.91	0.95	0.91	0.95
151	NASDAQ	ATRO	Fri, May 1, 1992	0.91	0.95	0.87	0.95
150	NASDAQ	ATRO	Thu, Apr 30, 1992	0.91	1.04	0.91	0.91
149	NASDAQ	ATRO	Wed, Apr 29, 1992	0.91	0.95	0.91	0.91
148	NASDAQ	ATRO	Tue, Apr 28, 1992	1.04	1.04	0.91	0.91
147	NASDAQ	ATRO	Mon, Apr 27, 1992	0.91	1.04	0.91	1.04
146	NASDAQ	ATRO	Fri, Apr 24, 1992	1.00	1.04	1.00	1.04
145	NASDAQ	ATRO	Thu, Apr 23, 1992	1.00	1.00	1.00	1.00
144	NASDAQ	ATRO	Wed, Apr 22, 1992	1.04	1.04	1.04	1.04
143	NASDAQ	ATRO	Tue, Apr 21, 1992	1.04	1.04	0.91	0.91
142	NASDAQ	ATRO	Mon, Apr 20, 1992	0.95	1.04	0.95	1.04
141	NASDAQ	ATRO	Thu, Apr 16, 1992	0.95	1.08	0.95	0.95
140	NASDAQ	ATRO	Wed, Apr 15, 1992	1.08	1.08	1.08	1.08
139	NASDAQ	ATRO	Tue, Apr 14, 1992	0.95	0.95	0.95	0.95
138	NASDAQ	ATRO	Mon, Apr 13, 1992	0.91	1.08	0.91	1.08
137	NASDAQ	ATRO	Thu, Apr 9, 1992	0.91	1.08	0.91	1.08
136	NASDAQ	ATRO	Wed, Apr 8, 1992	1.04	1.08	0.95	1.08
135	NASDAQ	ATRO	Tue, Apr 7, 1992	1.00	1.00	0.91	0.95
134	NASDAQ	ATRO	Mon, Apr 6, 1992	1.04	1.04	0.95	0.98
133	NASDAQ	ATRO	Fri, Apr 3, 1992	1.04	1.04	0.91	0.98
132	NASDAQ	ATRO	Thu, Apr 2, 1992	1.04	1.04	0.91	0.95
131	NASDAQ	ATRO	Wed, Apr 1, 1992	0.95	1.04	0.95	1.04
130	NASDAQ	ATRO	Tue, Mar 31, 1992	0.91	1.04	0.91	0.95
129	NASDAQ	ATRO	Mon, Mar 30, 1992	0.91	1.00	0.91	1.00
128	NASDAQ	ATRO	Fri, Mar 27, 1992	0.95	1.00	0.95	1.00
127	NASDAQ	ATRO	Thu, Mar 26, 1992	1.04	1.04	1.00	1.04
126	NASDAQ	ATRO	Wed, Mar 25, 1992	1.12	1.12	0.91	0.91
125	NASDAQ	ATRO	Tue, Mar 24, 1992	1.12	1.12	1.00	1.12
124	NASDAQ	ATRO	Mon, Mar 23, 1992	1.12	1.12	1.00	1.12
123	NASDAQ	ATRO	Fri, Mar 20, 1992	1.12	1.12	1.08	1.08
122	NASDAQ	ATRO	Thu, Mar 19, 1992	1.08	1.08	1.00	1.04
121	NASDAQ	ATRO	Wed, Mar 18, 1992	1.08	1.08	1.00	1.00
120	NASDAQ	ATRO	Tue, Mar 17, 1992	1.00	1.04	0.87	1.00
119	NASDAQ	ATRO	Mon, Mar 16, 1992	1.04	1.12	0.95	0.95
118	NASDAQ	ATRO	Fri, Mar 13, 1992	1.12	1.12	1.00	1.00
117	NASDAQ	ATRO	Thu, Mar 12, 1992	1.16	1.16	1.00	1.06
116	NASDAQ	ATRO	Wed, Mar 11, 1992	1.08	1.16	1.08	1.08
115	NASDAQ	ATRO	Tue, Mar 10, 1992	1.16	1.16	1.08	1.16
114	NASDAQ	ATRO	Mon, Mar 9, 1992	1.08	1.12	1.08	1.12
113	NASDAQ	ATRO	Fri, Mar 6, 1992	1.08	1.20	1.08	1.14
112	NASDAQ	ATRO	Thu, Mar 5, 1992	1.16	1.16	1.16	1.16
111	NASDAQ	ATRO	Wed, Mar 4, 1992	1.08	1.20	1.08	1.20
110	NASDAQ	ATRO	Tue, Mar 3, 1992	1.16	1.16	1.08	1.16
109	NASDAQ	ATRO	Mon, Mar 2, 1992	1.16	1.16	1.08	1.12
108	NASDAQ	ATRO	Fri, Feb 28, 1992	1.16	1.16	1.04	1.12
107	NASDAQ	ATRO	Thu, Feb 27, 1992	1.16	1.16	1.04	1.04
106	NASDAQ	ATRO	Wed, Feb 26, 1992	1.16	1.16	1.04	1.12
105	NASDAQ	ATRO	Tue, Feb 25, 1992	1.16	1.16	1.04	1.04
104	NASDAQ	ATRO	Mon, Feb 24, 1992	1.12	1.25	1.08	1.16
103	NASDAQ	ATRO	Fri, Feb 21, 1992	1.08	1.20	1.08	1.20
102	NASDAQ	ATRO	Thu, Feb 20, 1992	1.20	1.20	1.08	1.08
101	NASDAQ	ATRO	Wed, Feb 19, 1992	1.12	1.20	1.04	1.20
100	NASDAQ	ATRO	Tue, Feb 18, 1992	1.25	1.25	1.12	1.20
99	NASDAQ	ATRO	Fri, Feb 14, 1992	1.25	1.33	1.16	1.20
98	NASDAQ	ATRO	Thu, Feb 13, 1992	1.25	1.37	1.25	1.25
97	NASDAQ	ATRO	Wed, Feb 12, 1992	1.33	1.33	1.12	1.20
96	NASDAQ	ATRO	Tue, Feb 11, 1992	1.33	1.33	1.16	1.16
95	NASDAQ	ATRO	Mon, Feb 10, 1992	1.16	1.29	1.08	1.27
94	NASDAQ	ATRO	Fri, Feb 7, 1992	1.16	1.16	1.04	1.08
93	NASDAQ	ATRO	Thu, Feb 6, 1992	1.04	1.16	1.00	1.16
92	NASDAQ	ATRO	Wed, Feb 5, 1992	1.08	1.20	1.04	1.08
91	NASDAQ	ATRO	Tue, Feb 4, 1992	0.87	1.20	0.83	1.08
90	NASDAQ	ATRO	Mon, Feb 3, 1992	0.87	0.87	0.79	0.87
89	NASDAQ	ATRO	Fri, Jan 31, 1992	0.87	0.87	0.79	0.83
88	NASDAQ	ATRO	Thu, Jan 30, 1992	0.75	0.87	0.75	0.75
87	NASDAQ	ATRO	Wed, Jan 29, 1992	0.79	0.91	0.75	0.75
86	NASDAQ	ATRO	Tue, Jan 28, 1992	0.91	0.91	0.79	0.79
85	NASDAQ	ATRO	Mon, Jan 27, 1992	0.71	0.91	0.71	0.91
84	NASDAQ	ATRO	Fri, Jan 24, 1992	0.71	0.71	0.66	0.71
83	NASDAQ	ATRO	Thu, Jan 23, 1992	0.62	0.62	0.62	0.62
82	NASDAQ	ATRO	Wed, Jan 22, 1992	0.71	0.71	0.71	0.71
81	NASDAQ	ATRO	Tue, Jan 21, 1992	0.66	0.79	0.62	0.66
80	NASDAQ	ATRO	Mon, Jan 20, 1992	0.75	0.75	0.75	0.75
79	NASDAQ	ATRO	Fri, Jan 17, 1992	0.66	0.66	0.66	0.66
78	NASDAQ	ATRO	Thu, Jan 16, 1992	0.66	0.79	0.66	0.79
77	NASDAQ	ATRO	Wed, Jan 15, 1992	0.71	0.71	0.66	0.66
76	NASDAQ	ATRO	Tue, Jan 14, 1992	0.66	0.79	0.66	0.66
75	NASDAQ	ATRO	Mon, Jan 13, 1992	0.66	0.66	0.66	0.66
74	NASDAQ	ATRO	Fri, Jan 10, 1992	0.66	0.79	0.66	0.73
73	NASDAQ	ATRO	Thu, Jan 9, 1992	0.66	0.66	0.66	0.66
72	NASDAQ	ATRO	Wed, Jan 8, 1992	0.66	0.66	0.66	0.66
71	NASDAQ	ATRO	Mon, Jan 6, 1992	0.66	0.66	0.66	0.66
70	NASDAQ	ATRO	Fri, Jan 3, 1992	0.66	0.79	0.66	0.79
69	NASDAQ	ATRO	Thu, Jan 2, 1992	0.66	0.66	0.66	0.66
68	NASDAQ	ATRO	Tue, Dec 31, 1991	0.79	0.79	0.66	0.79
67	NASDAQ	ATRO	Mon, Dec 30, 1991	0.71	0.71	0.71	0.71
66	NASDAQ	ATRO	Fri, Dec 27, 1991	0.71	0.79	0.71	0.79
65	NASDAQ	ATRO	Thu, Dec 26, 1991	0.71	0.75	0.71	0.71
64	NASDAQ	ATRO	Tue, Dec 24, 1991	0.71	0.71	0.71	0.71
63	NASDAQ	ATRO	Mon, Dec 23, 1991	0.71	0.71	0.71	0.71
62	NASDAQ	ATRO	Fri, Dec 20, 1991	0.71	0.79	0.71	0.71
61	NASDAQ	ATRO	Thu, Dec 19, 1991	0.71	0.79	0.71	0.75
60	NASDAQ	ATRO	Wed, Dec 18, 1991	0.66	0.79	0.66	0.71
59	NASDAQ	ATRO	Tue, Dec 17, 1991	0.66	0.75	0.66	0.75
58	NASDAQ	ATRO	Mon, Dec 16, 1991	0.75	0.75	0.66	0.66
57	NASDAQ	ATRO	Fri, Dec 13, 1991	0.75	0.75	0.66	0.66
56	NASDAQ	ATRO	Thu, Dec 12, 1991	0.75	0.75	0.75	0.75
55	NASDAQ	ATRO	Tue, Dec 10, 1991	0.75	0.75	0.66	0.66
54	NASDAQ	ATRO	Mon, Dec 9, 1991	0.66	0.66	0.66	0.66
53	NASDAQ	ATRO	Fri, Dec 6, 1991	0.75	0.75	0.75	0.75
52	NASDAQ	ATRO	Thu, Dec 5, 1991	0.71	0.71	0.71	0.71
51	NASDAQ	ATRO	Wed, Dec 4, 1991	0.75	0.75	0.71	0.71
50	NASDAQ	ATRO	Tue, Dec 3, 1991	0.83	0.83	0.71	0.71
49	NASDAQ	ATRO	Mon, Dec 2, 1991	0.71	0.83	0.71	0.83
48	NASDAQ	ATRO	Fri, Nov 29, 1991	0.71	0.71	0.71	0.71
47	NASDAQ	ATRO	Wed, Nov 27, 1991	0.71	0.79	0.71	0.79
46	NASDAQ	ATRO	Tue, Nov 26, 1991	0.75	0.75	0.75	0.75
45	NASDAQ	ATRO	Mon, Nov 25, 1991	0.62	0.79	0.62	0.75
44	NASDAQ	ATRO	Fri, Nov 22, 1991	0.75	0.83	0.66	0.66
43	NASDAQ	ATRO	Thu, Nov 21, 1991	0.75	0.75	0.75	0.75
42	NASDAQ	ATRO	Wed, Nov 20, 1991	0.75	0.75	0.75	0.75
41	NASDAQ	ATRO	Tue, Nov 19, 1991	0.75	0.79	0.75	0.79
40	NASDAQ	ATRO	Mon, Nov 18, 1991	0.83	0.83	0.75	0.79
39	NASDAQ	ATRO	Fri, Nov 15, 1991	0.79	0.83	0.79	0.83
38	NASDAQ	ATRO	Thu, Nov 14, 1991	0.79	0.87	0.79	0.87
37	NASDAQ	ATRO	Wed, Nov 13, 1991	0.91	0.91	0.79	0.79
36	NASDAQ	ATRO	Tue, Nov 12, 1991	0.83	0.83	0.79	0.83
35	NASDAQ	ATRO	Mon, Nov 11, 1991	0.91	0.91	0.83	0.83
34	NASDAQ	ATRO	Fri, Nov 8, 1991	0.91	0.91	0.83	0.91
33	NASDAQ	ATRO	Thu, Nov 7, 1991	0.85	0.91	0.85	0.91
32	NASDAQ	ATRO	Wed, Nov 6, 1991	0.85	0.85	0.85	0.85
31	NASDAQ	ATRO	Tue, Nov 5, 1991	0.87	0.95	0.87	0.91
30	NASDAQ	ATRO	Mon, Nov 4, 1991	0.87	0.95	0.87	0.95
29	NASDAQ	ATRO	Fri, Nov 1, 1991	0.87	0.89	0.87	0.87
28	NASDAQ	ATRO	Thu, Oct 31, 1991	0.87	0.95	0.87	0.95
27	NASDAQ	ATRO	Wed, Oct 30, 1991	1.04	1.04	0.91	0.95
26	NASDAQ	ATRO	Tue, Oct 29, 1991	0.95	1.04	0.91	0.95
25	NASDAQ	ATRO	Mon, Oct 28, 1991	0.91	0.91	0.91	0.91
24	NASDAQ	ATRO	Wed, Oct 23, 1991	0.91	0.91	0.91	0.91
23	NASDAQ	ATRO	Mon, Oct 21, 1991	1.04	1.04	0.91	0.98
22	NASDAQ	ATRO	Fri, Oct 18, 1991	0.95	0.95	0.95	0.95
21	NASDAQ	ATRO	Tue, Oct 15, 1991	0.91	0.91	0.91	0.91
20	NASDAQ	ATRO	Mon, Oct 14, 1991	0.87	0.87	0.87	0.87
19	NASDAQ	ATRO	Fri, Oct 11, 1991	0.87	0.95	0.87	0.95
18	NASDAQ	ATRO	Thu, Oct 10, 1991	0.91	0.91	0.91	0.91
17	NASDAQ	ATRO	Wed, Oct 9, 1991	0.87	0.87	0.87	0.87
16	NASDAQ	ATRO	Mon, Oct 7, 1991	0.87	0.87	0.87	0.87
15	NASDAQ	ATRO	Thu, Oct 3, 1991	0.95	0.95	0.91	0.91
14	NASDAQ	ATRO	Tue, Oct 1, 1991	0.83	0.95	0.83	0.95
13	NASDAQ	ATRO	Mon, Sep 30, 1991	0.87	0.91	0.83	0.91
12	NASDAQ	ATRO	Fri, Sep 27, 1991	0.95	0.95	0.95	0.95
11	NASDAQ	ATRO	Wed, Sep 25, 1991	0.95	0.95	0.95	0.95
10	NASDAQ	ATRO	Tue, Sep 24, 1991	1.00	1.00	1.00	1.00
9	NASDAQ	ATRO	Mon, Sep 23, 1991	0.91	1.00	0.91	1.00
8	NASDAQ	ATRO	Fri, Sep 20, 1991	1.00	1.00	0.87	0.87
7	NASDAQ	ATRO	Thu, Sep 19, 1991	1.00	1.00	0.87	0.87
6	NASDAQ	ATRO	Wed, Sep 18, 1991	0.87	0.87	0.87	0.87
5	NASDAQ	ATRO	Tue, Sep 17, 1991	1.00	1.00	1.00	1.00
4	NASDAQ	ATRO	Mon, Sep 16, 1991	0.87	0.87	0.87	0.87
3	NASDAQ	ATRO	Fri, Sep 13, 1991	0.87	0.87	0.87	0.87
2	NASDAQ	ATRO	Thu, Sep 12, 1991	0.87	0.87	0.87	0.87
1	NASDAQ	ATRO	Wed, Sep 11, 1991	0.87	0.87	0.87	0.87
#	Exchange	Symbol	Date	Open	High	Low	Close

Astronics Corp NASDAQ:ATRO Historical Prices

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