Chesapeake Energy Corp NASDAQ:CHK Historical Prices

Below are the 7648 trading days of historical prices for CHK.

#	Exchange	Symbol	Date	Open	High	Low	Close
7648	NASDAQ	CHK	Mon, Mar 4, 2024	83.91	84.26	82.59	83.03
7647	NASDAQ	CHK	Fri, Mar 1, 2024	83.29	83.67	82.43	82.81
7646	NASDAQ	CHK	Thu, Feb 29, 2024	82.12	83.27	81.97	82.78
7645	NASDAQ	CHK	Wed, Feb 28, 2024	81.61	82.56	81.23	82.05
7644	NASDAQ	CHK	Tue, Feb 27, 2024	82.52	82.73	81.47	81.94
7643	NASDAQ	CHK	Mon, Feb 26, 2024	82.13	82.74	81.46	81.98
7642	NASDAQ	CHK	Fri, Feb 23, 2024	82.34	82.34	80.92	81.93
7641	NASDAQ	CHK	Thu, Feb 22, 2024	82.34	83.58	81.38	83.28
7640	NASDAQ	CHK	Wed, Feb 21, 2024	79.50	84.33	79.50	83.85
7639	NASDAQ	CHK	Tue, Feb 20, 2024	78.38	78.94	77.54	77.65
7638	NASDAQ	CHK	Fri, Feb 16, 2024	78.10	79.12	77.21	78.73
7637	NASDAQ	CHK	Thu, Feb 15, 2024	76.57	79.11	76.00	78.09
7636	NASDAQ	CHK	Wed, Feb 14, 2024	76.48	76.82	74.70	75.85
7635	NASDAQ	CHK	Tue, Feb 13, 2024	76.86	76.99	75.59	76.43
7634	NASDAQ	CHK	Mon, Feb 12, 2024	76.77	78.45	76.75	77.56
7633	NASDAQ	CHK	Fri, Feb 9, 2024	77.07	77.23	76.39	76.83
7632	NASDAQ	CHK	Thu, Feb 8, 2024	75.69	77.32	75.57	77.27
7631	NASDAQ	CHK	Wed, Feb 7, 2024	76.43	76.88	75.00	76.04
7630	NASDAQ	CHK	Tue, Feb 6, 2024	75.94	76.61	75.09	76.03
7629	NASDAQ	CHK	Mon, Feb 5, 2024	76.11	76.23	74.76	75.35
7628	NASDAQ	CHK	Fri, Feb 2, 2024	76.50	77.70	76.18	76.59
7627	NASDAQ	CHK	Thu, Feb 1, 2024	77.23	78.12	76.46	76.93
7626	NASDAQ	CHK	Wed, Jan 31, 2024	79.16	79.30	77.07	77.11
7625	NASDAQ	CHK	Tue, Jan 30, 2024	76.99	79.21	76.78	79.12
7624	NASDAQ	CHK	Mon, Jan 29, 2024	77.90	77.90	76.64	77.48
7623	NASDAQ	CHK	Fri, Jan 26, 2024	77.58	77.96	75.98	77.51
7622	NASDAQ	CHK	Thu, Jan 25, 2024	77.05	77.58	76.55	77.35
7621	NASDAQ	CHK	Wed, Jan 24, 2024	75.36	76.81	75.02	76.44
7620	NASDAQ	CHK	Tue, Jan 23, 2024	74.92	75.56	74.18	74.89
7619	NASDAQ	CHK	Mon, Jan 22, 2024	75.45	76.24	74.42	75.31
7618	NASDAQ	CHK	Fri, Jan 19, 2024	75.95	76.04	74.84	75.94
7617	NASDAQ	CHK	Thu, Jan 18, 2024	76.97	76.97	75.41	76.35
7616	NASDAQ	CHK	Wed, Jan 17, 2024	77.84	78.30	76.71	76.99
7615	NASDAQ	CHK	Tue, Jan 16, 2024	82.00	82.38	78.22	78.66
7614	NASDAQ	CHK	Fri, Jan 12, 2024	82.26	83.00	81.18	82.87
7613	NASDAQ	CHK	Thu, Jan 11, 2024	79.97	82.99	78.60	79.62
7612	NASDAQ	CHK	Wed, Jan 10, 2024	77.89	78.26	76.78	77.18
7611	NASDAQ	CHK	Tue, Jan 9, 2024	79.29	79.29	77.36	78.35
7610	NASDAQ	CHK	Mon, Jan 8, 2024	77.72	78.96	76.73	78.76
7609	NASDAQ	CHK	Fri, Jan 5, 2024	76.85	80.05	75.72	79.20
7608	NASDAQ	CHK	Thu, Jan 4, 2024	78.79	78.91	76.70	76.96
7607	NASDAQ	CHK	Wed, Jan 3, 2024	76.54	78.10	76.00	77.94
7606	NASDAQ	CHK	Tue, Jan 2, 2024	77.86	78.34	76.65	76.99
7605	NASDAQ	CHK	Fri, Dec 29, 2023	77.60	77.84	76.84	76.94
7604	NASDAQ	CHK	Thu, Dec 28, 2023	78.27	78.87	77.48	77.52
7603	NASDAQ	CHK	Wed, Dec 27, 2023	77.95	78.39	77.52	78.10
7602	NASDAQ	CHK	Tue, Dec 26, 2023	77.16	78.32	77.08	77.95
7601	NASDAQ	CHK	Fri, Dec 22, 2023	77.22	77.80	76.48	77.28
7600	NASDAQ	CHK	Thu, Dec 21, 2023	75.68	77.35	75.35	77.33
7599	NASDAQ	CHK	Wed, Dec 20, 2023	76.85	77.68	75.12	75.18
7598	NASDAQ	CHK	Tue, Dec 19, 2023	75.97	77.16	75.46	76.92
7597	NASDAQ	CHK	Mon, Dec 18, 2023	77.18	77.45	76.11	76.30
7596	NASDAQ	CHK	Fri, Dec 15, 2023	75.42	75.98	74.75	75.77
7595	NASDAQ	CHK	Thu, Dec 14, 2023	75.05	76.69	74.64	75.77
7594	NASDAQ	CHK	Wed, Dec 13, 2023	73.84	75.08	73.21	74.95
7593	NASDAQ	CHK	Tue, Dec 12, 2023	73.70	74.58	73.14	73.76
7592	NASDAQ	CHK	Mon, Dec 11, 2023	73.42	75.12	72.84	75.10
7591	NASDAQ	CHK	Fri, Dec 8, 2023	75.16	76.30	74.21	75.05
7590	NASDAQ	CHK	Thu, Dec 7, 2023	74.34	75.22	73.87	75.04
7589	NASDAQ	CHK	Wed, Dec 6, 2023	75.91	76.67	73.89	73.95
7588	NASDAQ	CHK	Tue, Dec 5, 2023	78.69	78.69	76.39	76.39
7587	NASDAQ	CHK	Mon, Dec 4, 2023	79.64	80.12	78.01	78.32
7586	NASDAQ	CHK	Fri, Dec 1, 2023	79.95	81.15	79.80	80.60
7585	NASDAQ	CHK	Thu, Nov 30, 2023	80.58	81.67	79.35	80.31
7584	NASDAQ	CHK	Wed, Nov 29, 2023	81.50	81.50	79.72	79.77
7583	NASDAQ	CHK	Tue, Nov 28, 2023	81.84	81.84	80.50	80.98
7582	NASDAQ	CHK	Mon, Nov 27, 2023	81.45	81.81	80.59	81.56
7581	NASDAQ	CHK	Fri, Nov 24, 2023	81.50	82.90	81.47	82.15
7580	NASDAQ	CHK	Wed, Nov 22, 2023	80.39	82.70	79.94	81.81
7579	NASDAQ	CHK	Tue, Nov 21, 2023	81.61	82.13	80.20	81.67
7578	NASDAQ	CHK	Mon, Nov 20, 2023	81.24	82.32	80.80	81.76
7577	NASDAQ	CHK	Fri, Nov 17, 2023	81.59	82.61	81.19	81.58
7576	NASDAQ	CHK	Thu, Nov 16, 2023	82.41	83.16	80.35	81.13
7575	NASDAQ	CHK	Wed, Nov 15, 2023	81.21	83.71	80.98	83.25
7574	NASDAQ	CHK	Tue, Nov 14, 2023	80.15	81.87	80.00	81.54
7573	NASDAQ	CHK	Mon, Nov 13, 2023	80.15	80.85	79.33	80.01
7572	NASDAQ	CHK	Fri, Nov 10, 2023	81.00	81.18	78.27	79.09
7571	NASDAQ	CHK	Thu, Nov 9, 2023	81.58	81.97	80.42	80.49
7570	NASDAQ	CHK	Wed, Nov 8, 2023	82.15	83.00	81.37	81.40
7569	NASDAQ	CHK	Tue, Nov 7, 2023	84.37	84.58	81.49	82.59
7568	NASDAQ	CHK	Mon, Nov 6, 2023	88.66	89.09	84.88	85.22
7567	NASDAQ	CHK	Fri, Nov 3, 2023	89.17	89.95	88.64	89.36
7566	NASDAQ	CHK	Thu, Nov 2, 2023	86.91	88.95	86.65	88.70
7565	NASDAQ	CHK	Wed, Nov 1, 2023	88.00	88.75	84.29	86.91
7564	NASDAQ	CHK	Tue, Oct 31, 2023	86.32	86.75	85.47	86.08
7563	NASDAQ	CHK	Mon, Oct 30, 2023	85.29	85.90	84.46	85.60
7562	NASDAQ	CHK	Fri, Oct 27, 2023	86.85	87.49	84.99	85.79
7561	NASDAQ	CHK	Thu, Oct 26, 2023	85.47	87.61	84.25	87.08
7560	NASDAQ	CHK	Wed, Oct 25, 2023	87.13	87.29	85.25	86.65
7559	NASDAQ	CHK	Tue, Oct 24, 2023	87.73	87.75	86.17	86.93
7558	NASDAQ	CHK	Mon, Oct 23, 2023	87.18	87.61	86.25	86.85
7557	NASDAQ	CHK	Fri, Oct 20, 2023	88.83	88.88	87.61	88.02
7556	NASDAQ	CHK	Thu, Oct 19, 2023	88.81	89.97	88.13	88.77
7555	NASDAQ	CHK	Wed, Oct 18, 2023	89.88	89.88	88.00	89.37
7554	NASDAQ	CHK	Tue, Oct 17, 2023	89.09	91.00	87.07	89.59
7553	NASDAQ	CHK	Mon, Oct 16, 2023	89.12	89.27	87.41	89.00
7552	NASDAQ	CHK	Fri, Oct 13, 2023	89.75	89.92	88.87	88.92
7551	NASDAQ	CHK	Thu, Oct 12, 2023	88.56	89.17	87.85	88.92
7550	NASDAQ	CHK	Wed, Oct 11, 2023	88.03	88.57	86.81	88.20
7549	NASDAQ	CHK	Tue, Oct 10, 2023	89.10	89.77	88.10	88.74
7548	NASDAQ	CHK	Mon, Oct 9, 2023	88.68	89.60	88.40	89.10
7547	NASDAQ	CHK	Fri, Oct 6, 2023	84.62	88.07	84.13	87.28
7546	NASDAQ	CHK	Thu, Oct 5, 2023	81.75	84.24	81.57	83.98
7545	NASDAQ	CHK	Wed, Oct 4, 2023	82.58	82.58	80.75	82.19
7544	NASDAQ	CHK	Tue, Oct 3, 2023	83.46	84.12	81.90	82.97
7543	NASDAQ	CHK	Mon, Oct 2, 2023	85.97	85.97	83.02	83.64
7542	NASDAQ	CHK	Fri, Sep 29, 2023	86.90	87.06	85.83	86.23
7541	NASDAQ	CHK	Thu, Sep 28, 2023	85.46	87.19	85.46	86.72
7540	NASDAQ	CHK	Wed, Sep 27, 2023	84.00	86.03	83.96	85.62
7539	NASDAQ	CHK	Tue, Sep 26, 2023	82.13	83.43	82.07	83.08
7538	NASDAQ	CHK	Mon, Sep 25, 2023	81.92	83.43	81.86	83.09
7537	NASDAQ	CHK	Fri, Sep 22, 2023	82.79	83.64	81.84	82.07
7536	NASDAQ	CHK	Thu, Sep 21, 2023	83.87	84.21	82.29	82.70
7535	NASDAQ	CHK	Wed, Sep 20, 2023	83.84	84.97	83.69	83.81
7534	NASDAQ	CHK	Tue, Sep 19, 2023	86.18	86.67	84.31	84.67
7533	NASDAQ	CHK	Mon, Sep 18, 2023	85.70	85.78	84.78	85.28
7532	NASDAQ	CHK	Fri, Sep 15, 2023	87.17	87.18	84.84	85.45
7531	NASDAQ	CHK	Thu, Sep 14, 2023	88.45	88.69	87.08	87.53
7530	NASDAQ	CHK	Wed, Sep 13, 2023	88.61	88.77	86.76	87.25
7529	NASDAQ	CHK	Tue, Sep 12, 2023	88.47	89.05	87.83	88.20
7528	NASDAQ	CHK	Mon, Sep 11, 2023	87.42	87.42	87.31	87.42
7527	NASDAQ	CHK	Fri, Sep 8, 2023	88.31	89.10	88.15	88.49
7526	NASDAQ	CHK	Thu, Sep 7, 2023	88.26	88.88	87.32	87.64
7525	NASDAQ	CHK	Wed, Sep 6, 2023	88.13	89.24	87.92	88.40
7524	NASDAQ	CHK	Tue, Sep 5, 2023	89.88	90.60	88.63	88.76
7523	NASDAQ	CHK	Fri, Sep 1, 2023	89.43	90.46	89.12	90.26
7522	NASDAQ	CHK	Thu, Aug 31, 2023	87.99	88.56	87.64	88.21
7521	NASDAQ	CHK	Wed, Aug 30, 2023	86.41	87.99	86.11	87.80
7520	NASDAQ	CHK	Tue, Aug 29, 2023	85.47	86.43	84.90	86.36
7519	NASDAQ	CHK	Mon, Aug 28, 2023	86.00	86.58	85.31	85.47
7518	NASDAQ	CHK	Fri, Aug 25, 2023	84.99	85.62	83.92	85.13
7517	NASDAQ	CHK	Thu, Aug 24, 2023	84.62	86.10	84.07	84.52
7516	NASDAQ	CHK	Wed, Aug 23, 2023	85.45	85.59	84.84	84.90
7515	NASDAQ	CHK	Tue, Aug 22, 2023	86.81	87.57	85.81	86.07
7514	NASDAQ	CHK	Mon, Aug 21, 2023	85.93	87.37	85.93	86.78
7513	NASDAQ	CHK	Fri, Aug 18, 2023	85.56	86.28	85.01	85.93
7512	NASDAQ	CHK	Thu, Aug 17, 2023	87.50	88.16	86.15	86.25
7511	NASDAQ	CHK	Wed, Aug 16, 2023	81.62	82.80	81.37	82.58
7510	NASDAQ	CHK	Tue, Aug 15, 2023	83.50	83.77	82.58	82.87
7509	NASDAQ	CHK	Mon, Aug 14, 2023	85.10	85.10	83.87	84.33
7508	NASDAQ	CHK	Fri, Aug 11, 2023	85.31	86.09	84.57	84.95
7507	NASDAQ	CHK	Thu, Aug 10, 2023	87.66	88.45	85.19	85.42
7506	NASDAQ	CHK	Wed, Aug 9, 2023	89.01	89.06	87.61	87.78
7505	NASDAQ	CHK	Tue, Aug 8, 2023	85.69	87.65	85.19	87.20
7504	NASDAQ	CHK	Mon, Aug 7, 2023	86.06	87.57	85.46	86.90
7503	NASDAQ	CHK	Fri, Aug 4, 2023	84.77	86.74	84.37	85.37
7502	NASDAQ	CHK	Thu, Aug 3, 2023	83.09	85.04	81.96	84.02
7501	NASDAQ	CHK	Wed, Aug 2, 2023	84.00	84.00	81.10	82.49
7500	NASDAQ	CHK	Tue, Aug 1, 2023	83.36	84.47	82.16	84.45
7499	NASDAQ	CHK	Mon, Jul 31, 2023	85.00	85.09	83.75	84.34
7498	NASDAQ	CHK	Fri, Jul 28, 2023	83.26	84.96	82.45	84.48
7497	NASDAQ	CHK	Thu, Jul 27, 2023	83.68	84.12	81.84	82.16
7496	NASDAQ	CHK	Wed, Jul 26, 2023	82.00	83.45	81.81	83.32
7495	NASDAQ	CHK	Tue, Jul 25, 2023	83.35	83.43	82.22	82.88
7494	NASDAQ	CHK	Mon, Jul 24, 2023	83.45	83.97	83.03	83.42
7493	NASDAQ	CHK	Fri, Jul 21, 2023	83.99	83.99	83.00	83.09
7492	NASDAQ	CHK	Thu, Jul 20, 2023	83.18	83.74	82.23	83.47
7491	NASDAQ	CHK	Wed, Jul 19, 2023	81.52	83.01	81.46	82.14
7490	NASDAQ	CHK	Tue, Jul 18, 2023	81.17	83.04	81.01	81.51
7489	NASDAQ	CHK	Mon, Jul 17, 2023	80.92	81.41	79.74	80.85
7488	NASDAQ	CHK	Fri, Jul 14, 2023	83.25	83.41	80.85	81.12
7487	NASDAQ	CHK	Thu, Jul 13, 2023	84.19	84.98	82.97	83.40
7486	NASDAQ	CHK	Wed, Jul 12, 2023	84.27	84.98	83.67	84.11
7485	NASDAQ	CHK	Tue, Jul 11, 2023	83.27	84.97	82.96	84.23
7484	NASDAQ	CHK	Mon, Jul 10, 2023	82.76	83.01	81.90	82.84
7483	NASDAQ	CHK	Fri, Jul 7, 2023	81.35	83.41	81.13	82.15
7482	NASDAQ	CHK	Thu, Jul 6, 2023	82.90	83.04	80.35	81.30
7481	NASDAQ	CHK	Wed, Jul 5, 2023	84.19	84.19	82.90	83.31
7480	NASDAQ	CHK	Mon, Jul 3, 2023	83.70	84.74	83.57	83.79
7479	NASDAQ	CHK	Fri, Jun 30, 2023	84.18	84.67	82.73	83.68
7478	NASDAQ	CHK	Thu, Jun 29, 2023	81.53	84.03	81.29	84.00
7477	NASDAQ	CHK	Wed, Jun 28, 2023	82.26	82.42	81.21	81.31
7476	NASDAQ	CHK	Tue, Jun 27, 2023	81.00	82.45	80.20	81.82
7475	NASDAQ	CHK	Mon, Jun 26, 2023	80.77	82.37	80.77	81.46
7474	NASDAQ	CHK	Fri, Jun 23, 2023	80.01	81.25	79.99	80.59
7473	NASDAQ	CHK	Thu, Jun 22, 2023	80.87	81.29	80.00	81.08
7472	NASDAQ	CHK	Wed, Jun 21, 2023	80.98	82.80	80.93	81.86
7471	NASDAQ	CHK	Tue, Jun 20, 2023	82.07	82.34	80.15	81.01
7470	NASDAQ	CHK	Fri, Jun 16, 2023	81.80	82.97	81.75	82.36
7469	NASDAQ	CHK	Thu, Jun 15, 2023	80.12	83.37	80.00	81.53
7468	NASDAQ	CHK	Wed, Jun 14, 2023	80.80	81.18	79.14	79.76
7467	NASDAQ	CHK	Tue, Jun 13, 2023	79.97	81.34	79.73	80.56
7466	NASDAQ	CHK	Mon, Jun 12, 2023	79.00	79.66	78.26	78.94
7465	NASDAQ	CHK	Fri, Jun 9, 2023	81.25	81.45	79.64	79.90
7464	NASDAQ	CHK	Thu, Jun 8, 2023	81.46	81.46	79.82	81.38
7463	NASDAQ	CHK	Wed, Jun 7, 2023	79.84	82.05	79.54	81.24
7462	NASDAQ	CHK	Tue, Jun 6, 2023	77.00	79.47	76.67	79.12
7461	NASDAQ	CHK	Mon, Jun 5, 2023	81.00	81.00	77.38	77.69
7460	NASDAQ	CHK	Fri, Jun 2, 2023	77.15	80.22	76.89	79.63
7459	NASDAQ	CHK	Thu, Jun 1, 2023	75.56	76.79	75.24	76.15
7458	NASDAQ	CHK	Wed, May 31, 2023	74.53	76.44	74.53	75.25
7457	NASDAQ	CHK	Tue, May 30, 2023	76.39	76.50	74.16	75.52
7456	NASDAQ	CHK	Fri, May 26, 2023	78.96	79.09	76.78	77.63
7455	NASDAQ	CHK	Thu, May 25, 2023	78.82	79.67	78.38	78.96
7454	NASDAQ	CHK	Wed, May 24, 2023	81.50	81.50	79.83	79.97
7453	NASDAQ	CHK	Tue, May 23, 2023	82.89	82.91	80.57	80.78
7452	NASDAQ	CHK	Mon, May 22, 2023	80.07	82.28	79.73	81.82
7451	NASDAQ	CHK	Fri, May 19, 2023	82.86	83.05	80.86	81.22
7450	NASDAQ	CHK	Thu, May 18, 2023	77.76	82.33	77.56	82.23
7449	NASDAQ	CHK	Wed, May 17, 2023	79.46	79.60	77.53	78.26
7448	NASDAQ	CHK	Tue, May 16, 2023	82.07	82.58	79.69	79.98
7447	NASDAQ	CHK	Mon, May 15, 2023	80.76	82.39	80.15	82.01
7446	NASDAQ	CHK	Fri, May 12, 2023	78.12	79.95	77.04	79.78
7445	NASDAQ	CHK	Thu, May 11, 2023	76.97	77.83	76.80	77.26
7444	NASDAQ	CHK	Wed, May 10, 2023	78.78	78.86	76.84	77.70
7443	NASDAQ	CHK	Tue, May 9, 2023	78.00	78.42	77.26	78.09
7442	NASDAQ	CHK	Mon, May 8, 2023	80.24	80.75	77.99	78.32
7441	NASDAQ	CHK	Fri, May 5, 2023	79.21	80.24	77.78	78.64
7440	NASDAQ	CHK	Thu, May 4, 2023	77.10	78.67	76.19	76.97
7439	NASDAQ	CHK	Wed, May 3, 2023	76.83	78.78	74.83	77.03
7438	NASDAQ	CHK	Tue, May 2, 2023	80.74	81.29	78.41	80.11
7437	NASDAQ	CHK	Mon, May 1, 2023	81.71	82.96	81.34	82.24
7436	NASDAQ	CHK	Fri, Apr 28, 2023	80.77	83.28	80.46	82.68
7435	NASDAQ	CHK	Thu, Apr 27, 2023	79.33	81.00	78.86	80.36
7434	NASDAQ	CHK	Wed, Apr 26, 2023	79.01	79.76	77.83	79.33
7433	NASDAQ	CHK	Tue, Apr 25, 2023	81.55	81.57	79.35	79.82
7432	NASDAQ	CHK	Mon, Apr 24, 2023	81.07	82.74	80.70	82.47
7431	NASDAQ	CHK	Fri, Apr 21, 2023	80.91	81.25	79.90	80.85
7430	NASDAQ	CHK	Thu, Apr 20, 2023	80.27	81.01	79.76	80.99
7429	NASDAQ	CHK	Wed, Apr 19, 2023	80.00	81.35	79.68	80.93
7428	NASDAQ	CHK	Tue, Apr 18, 2023	81.55	82.00	80.68	81.36
7427	NASDAQ	CHK	Mon, Apr 17, 2023	82.00	82.20	81.18	81.59
7426	NASDAQ	CHK	Fri, Apr 14, 2023	80.53	81.27	80.36	80.98
7425	NASDAQ	CHK	Thu, Apr 13, 2023	78.64	80.88	78.61	80.53
7424	NASDAQ	CHK	Wed, Apr 12, 2023	79.25	80.02	78.61	79.05
7423	NASDAQ	CHK	Tue, Apr 11, 2023	77.57	78.92	77.27	78.87
7422	NASDAQ	CHK	Mon, Apr 10, 2023	76.13	78.85	75.98	77.54
7421	NASDAQ	CHK	Thu, Apr 6, 2023	76.37	76.57	74.96	75.28
7420	NASDAQ	CHK	Wed, Apr 5, 2023	76.98	77.61	75.48	76.72
7419	NASDAQ	CHK	Tue, Apr 4, 2023	77.27	77.48	75.00	76.31
7418	NASDAQ	CHK	Mon, Apr 3, 2023	77.95	79.00	75.65	76.87
7417	NASDAQ	CHK	Fri, Mar 31, 2023	75.72	76.68	75.35	76.04
7416	NASDAQ	CHK	Thu, Mar 30, 2023	75.67	75.75	74.46	74.98
7415	NASDAQ	CHK	Wed, Mar 29, 2023	76.33	76.33	74.93	75.11
7414	NASDAQ	CHK	Tue, Mar 28, 2023	75.00	77.04	74.82	75.79
7413	NASDAQ	CHK	Mon, Mar 27, 2023	74.44	76.17	73.53	75.38
7412	NASDAQ	CHK	Fri, Mar 24, 2023	72.57	75.10	72.17	74.30
7411	NASDAQ	CHK	Thu, Mar 23, 2023	74.10	74.76	72.23	73.15
7410	NASDAQ	CHK	Wed, Mar 22, 2023	75.00	75.42	73.61	73.78
7409	NASDAQ	CHK	Tue, Mar 21, 2023	74.66	75.77	73.52	74.94
7408	NASDAQ	CHK	Mon, Mar 20, 2023	72.21	74.76	71.93	73.74
7407	NASDAQ	CHK	Fri, Mar 17, 2023	72.29	72.86	71.03	72.07
7406	NASDAQ	CHK	Thu, Mar 16, 2023	70.02	73.54	69.68	73.25
7405	NASDAQ	CHK	Wed, Mar 15, 2023	71.53	72.78	69.75	71.66
7404	NASDAQ	CHK	Tue, Mar 14, 2023	74.50	76.52	73.61	74.72
7403	NASDAQ	CHK	Mon, Mar 13, 2023	73.21	75.74	72.28	74.26
7402	NASDAQ	CHK	Fri, Mar 10, 2023	76.39	77.38	74.61	75.18
7401	NASDAQ	CHK	Thu, Mar 9, 2023	78.75	79.66	76.50	76.53
7400	NASDAQ	CHK	Wed, Mar 8, 2023	78.75	80.10	77.62	78.43
7399	NASDAQ	CHK	Tue, Mar 7, 2023	79.24	79.97	78.59	79.17
7398	NASDAQ	CHK	Mon, Mar 6, 2023	81.02	81.53	78.67	79.48
7397	NASDAQ	CHK	Fri, Mar 3, 2023	80.50	84.26	80.50	84.17
7396	NASDAQ	CHK	Thu, Mar 2, 2023	81.35	82.36	80.59	82.08
7395	NASDAQ	CHK	Wed, Mar 1, 2023	80.10	81.98	79.01	81.34
7394	NASDAQ	CHK	Tue, Feb 28, 2023	82.46	82.75	79.51	80.81
7393	NASDAQ	CHK	Mon, Feb 27, 2023	86.01	86.59	81.45	81.93
7392	NASDAQ	CHK	Fri, Feb 24, 2023	80.79	85.60	80.35	85.40
7391	NASDAQ	CHK	Thu, Feb 23, 2023	81.00	82.42	79.48	80.92
7390	NASDAQ	CHK	Wed, Feb 22, 2023	80.50	81.12	77.93	79.70
7389	NASDAQ	CHK	Tue, Feb 21, 2023	79.42	79.83	77.17	78.04
7388	NASDAQ	CHK	Fri, Feb 17, 2023	82.30	82.61	79.60	80.09
7387	NASDAQ	CHK	Thu, Feb 16, 2023	83.45	85.40	82.70	83.91
7386	NASDAQ	CHK	Wed, Feb 15, 2023	83.06	83.89	82.21	83.16
7385	NASDAQ	CHK	Tue, Feb 14, 2023	83.54	84.54	82.75	83.87
7384	NASDAQ	CHK	Mon, Feb 13, 2023	82.66	83.99	82.12	83.47
7383	NASDAQ	CHK	Fri, Feb 10, 2023	83.28	83.91	81.75	83.84
7382	NASDAQ	CHK	Thu, Feb 9, 2023	82.22	83.15	81.19	82.18
7381	NASDAQ	CHK	Wed, Feb 8, 2023	85.00	85.77	81.25	81.98
7380	NASDAQ	CHK	Tue, Feb 7, 2023	83.21	85.16	82.81	85.09
7379	NASDAQ	CHK	Mon, Feb 6, 2023	84.60	85.03	82.30	82.86
7378	NASDAQ	CHK	Fri, Feb 3, 2023	85.75	86.85	84.00	84.60
7377	NASDAQ	CHK	Thu, Feb 2, 2023	84.35	85.88	83.50	85.48
7376	NASDAQ	CHK	Wed, Feb 1, 2023	85.59	86.87	82.48	83.78
7375	NASDAQ	CHK	Tue, Jan 31, 2023	86.38	87.21	85.47	86.72
7374	NASDAQ	CHK	Mon, Jan 30, 2023	87.10	87.38	85.90	86.24
7373	NASDAQ	CHK	Fri, Jan 27, 2023	88.05	88.95	87.05	87.64
7372	NASDAQ	CHK	Thu, Jan 26, 2023	91.43	91.87	85.65	87.86
7371	NASDAQ	CHK	Wed, Jan 25, 2023	91.50	91.60	89.28	91.20
7370	NASDAQ	CHK	Tue, Jan 24, 2023	92.36	92.54	90.77	91.84
7369	NASDAQ	CHK	Mon, Jan 23, 2023	91.82	92.98	90.96	92.23
7368	NASDAQ	CHK	Fri, Jan 20, 2023	91.81	93.12	90.36	90.88
7367	NASDAQ	CHK	Thu, Jan 19, 2023	88.22	90.99	86.87	90.90
7366	NASDAQ	CHK	Wed, Jan 18, 2023	90.48	91.84	88.30	88.82
7365	NASDAQ	CHK	Tue, Jan 17, 2023	92.64	92.99	89.65	90.48
7364	NASDAQ	CHK	Fri, Jan 13, 2023	91.03	91.35	89.72	91.21
7363	NASDAQ	CHK	Thu, Jan 12, 2023	91.16	92.28	90.59	91.49
7362	NASDAQ	CHK	Wed, Jan 11, 2023	89.88	90.71	87.52	89.57
7361	NASDAQ	CHK	Tue, Jan 10, 2023	89.28	89.61	86.59	88.37
7360	NASDAQ	CHK	Mon, Jan 9, 2023	89.66	91.17	88.70	89.19
7359	NASDAQ	CHK	Fri, Jan 6, 2023	85.40	87.83	84.99	87.79
7358	NASDAQ	CHK	Thu, Jan 5, 2023	88.97	89.14	84.60	84.89
7357	NASDAQ	CHK	Wed, Jan 4, 2023	84.80	89.70	84.57	89.28
7356	NASDAQ	CHK	Tue, Jan 3, 2023	93.07	93.53	85.81	86.13
7355	NASDAQ	CHK	Fri, Dec 30, 2022	93.80	95.01	93.37	94.37
7354	NASDAQ	CHK	Thu, Dec 29, 2022	92.82	95.19	92.60	94.58
7353	NASDAQ	CHK	Wed, Dec 28, 2022	97.24	97.41	93.56	93.63
7352	NASDAQ	CHK	Tue, Dec 27, 2022	98.12	99.49	97.67	98.71
7351	NASDAQ	CHK	Fri, Dec 23, 2022	94.41	97.41	93.56	97.37
7350	NASDAQ	CHK	Thu, Dec 22, 2022	98.10	98.33	92.88	93.88
7349	NASDAQ	CHK	Wed, Dec 21, 2022	98.10	98.56	96.31	98.50
7348	NASDAQ	CHK	Tue, Dec 20, 2022	95.30	96.70	94.78	95.68
7347	NASDAQ	CHK	Mon, Dec 19, 2022	97.38	98.33	95.27	95.94
7346	NASDAQ	CHK	Fri, Dec 16, 2022	97.10	98.65	95.73	97.65
7345	NASDAQ	CHK	Thu, Dec 15, 2022	98.38	99.91	98.08	98.92
7344	NASDAQ	CHK	Wed, Dec 14, 2022	100.75	101.28	98.88	99.16
7343	NASDAQ	CHK	Tue, Dec 13, 2022	101.69	102.35	98.86	99.95
7342	NASDAQ	CHK	Mon, Dec 12, 2022	96.84	99.49	95.82	98.97
7341	NASDAQ	CHK	Fri, Dec 9, 2022	93.89	95.76	93.62	94.72
7340	NASDAQ	CHK	Thu, Dec 8, 2022	97.89	98.42	93.55	94.11
7339	NASDAQ	CHK	Wed, Dec 7, 2022	93.92	96.30	93.28	95.87
7338	NASDAQ	CHK	Tue, Dec 6, 2022	94.65	97.74	92.91	93.72
7337	NASDAQ	CHK	Mon, Dec 5, 2022	102.15	104.32	94.66	95.82
7336	NASDAQ	CHK	Fri, Dec 2, 2022	101.33	102.55	100.31	101.75
7335	NASDAQ	CHK	Thu, Dec 1, 2022	104.27	105.15	102.05	102.18
7334	NASDAQ	CHK	Wed, Nov 30, 2022	100.45	103.92	99.35	103.50
7333	NASDAQ	CHK	Tue, Nov 29, 2022	99.75	100.57	98.07	99.30
7332	NASDAQ	CHK	Mon, Nov 28, 2022	99.85	100.81	98.01	98.24
7331	NASDAQ	CHK	Fri, Nov 25, 2022	104.00	104.93	102.25	102.94
7330	NASDAQ	CHK	Wed, Nov 23, 2022	102.32	104.20	101.70	103.46
7329	NASDAQ	CHK	Tue, Nov 22, 2022	99.50	102.46	98.63	102.18
7328	NASDAQ	CHK	Mon, Nov 21, 2022	97.79	98.69	94.04	98.08
7327	NASDAQ	CHK	Fri, Nov 18, 2022	97.50	99.42	96.61	98.86
7326	NASDAQ	CHK	Thu, Nov 17, 2022	98.71	99.95	97.45	99.88
7325	NASDAQ	CHK	Wed, Nov 16, 2022	100.56	101.45	98.46	99.57
7324	NASDAQ	CHK	Tue, Nov 15, 2022	99.92	102.71	98.80	102.28
7323	NASDAQ	CHK	Mon, Nov 14, 2022	100.27	101.93	99.03	99.19
7322	NASDAQ	CHK	Fri, Nov 11, 2022	103.94	106.25	101.02	102.43
7321	NASDAQ	CHK	Thu, Nov 10, 2022	101.22	102.24	99.27	101.81
7320	NASDAQ	CHK	Wed, Nov 9, 2022	102.26	102.73	98.62	98.71
7319	NASDAQ	CHK	Tue, Nov 8, 2022	102.56	105.14	100.05	104.75
7318	NASDAQ	CHK	Mon, Nov 7, 2022	102.86	105.44	102.00	104.23
7317	NASDAQ	CHK	Fri, Nov 4, 2022	101.60	102.16	97.89	100.87
7316	NASDAQ	CHK	Thu, Nov 3, 2022	102.40	103.40	98.44	99.12
7315	NASDAQ	CHK	Wed, Nov 2, 2022	103.76	107.31	101.88	103.77
7314	NASDAQ	CHK	Tue, Nov 1, 2022	103.37	103.91	101.10	102.67
7313	NASDAQ	CHK	Mon, Oct 31, 2022	99.51	103.61	99.32	102.27
7312	NASDAQ	CHK	Fri, Oct 28, 2022	98.60	99.50	95.80	97.86
7311	NASDAQ	CHK	Thu, Oct 27, 2022	100.15	101.45	98.00	98.03
7310	NASDAQ	CHK	Wed, Oct 26, 2022	99.25	100.47	97.88	98.80
7309	NASDAQ	CHK	Tue, Oct 25, 2022	96.58	99.25	95.12	98.89
7308	NASDAQ	CHK	Mon, Oct 24, 2022	96.81	98.78	95.51	96.71
7307	NASDAQ	CHK	Fri, Oct 21, 2022	98.97	99.27	95.33	97.02
7306	NASDAQ	CHK	Thu, Oct 20, 2022	100.80	101.65	97.93	98.84
7305	NASDAQ	CHK	Wed, Oct 19, 2022	99.02	100.12	98.02	99.53
7304	NASDAQ	CHK	Tue, Oct 18, 2022	97.37	99.95	96.77	98.49
7303	NASDAQ	CHK	Mon, Oct 17, 2022	95.11	97.67	94.96	97.20
7302	NASDAQ	CHK	Fri, Oct 14, 2022	99.95	100.42	95.07	95.32
7301	NASDAQ	CHK	Thu, Oct 13, 2022	98.80	102.48	98.06	101.96
7300	NASDAQ	CHK	Wed, Oct 12, 2022	95.73	101.20	94.91	99.51
7299	NASDAQ	CHK	Tue, Oct 11, 2022	95.52	98.52	94.81	96.60
7298	NASDAQ	CHK	Mon, Oct 10, 2022	102.70	105.45	97.34	97.63
7297	NASDAQ	CHK	Fri, Oct 7, 2022	101.50	103.56	100.39	100.46
7296	NASDAQ	CHK	Thu, Oct 6, 2022	101.83	103.87	101.03	101.65
7295	NASDAQ	CHK	Wed, Oct 5, 2022	102.45	103.51	100.56	102.44
7294	NASDAQ	CHK	Tue, Oct 4, 2022	101.84	103.37	100.57	102.24
7293	NASDAQ	CHK	Mon, Oct 3, 2022	95.98	99.47	95.98	98.93
7292	NASDAQ	CHK	Fri, Sep 30, 2022	91.97	95.39	91.61	94.21
7291	NASDAQ	CHK	Thu, Sep 29, 2022	94.90	95.33	91.12	93.84
7290	NASDAQ	CHK	Wed, Sep 28, 2022	91.96	95.84	91.95	95.49
7289	NASDAQ	CHK	Tue, Sep 27, 2022	92.30	93.89	91.16	91.89
7288	NASDAQ	CHK	Mon, Sep 26, 2022	92.02	94.22	90.90	91.09
7287	NASDAQ	CHK	Fri, Sep 23, 2022	93.93	94.00	90.59	92.93
7286	NASDAQ	CHK	Thu, Sep 22, 2022	104.36	105.03	98.34	98.53
7285	NASDAQ	CHK	Wed, Sep 21, 2022	104.80	105.36	101.46	102.08
7284	NASDAQ	CHK	Tue, Sep 20, 2022	101.75	103.65	99.89	102.61
7283	NASDAQ	CHK	Mon, Sep 19, 2022	98.02	102.60	97.54	102.26
7282	NASDAQ	CHK	Fri, Sep 16, 2022	103.59	103.84	99.18	100.58
7281	NASDAQ	CHK	Thu, Sep 15, 2022	101.64	104.20	101.00	103.59
7280	NASDAQ	CHK	Wed, Sep 14, 2022	104.25	105.93	103.07	104.56
7279	NASDAQ	CHK	Tue, Sep 13, 2022	102.91	104.99	100.63	101.43
7278	NASDAQ	CHK	Mon, Sep 12, 2022	104.59	104.83	102.22	103.83
7277	NASDAQ	CHK	Fri, Sep 9, 2022	102.46	104.27	102.15	102.78
7276	NASDAQ	CHK	Thu, Sep 8, 2022	98.68	101.02	97.13	100.40
7275	NASDAQ	CHK	Wed, Sep 7, 2022	94.50	98.01	92.88	97.74
7274	NASDAQ	CHK	Tue, Sep 6, 2022	99.17	99.75	96.18	96.53
7273	NASDAQ	CHK	Fri, Sep 2, 2022	101.44	101.48	99.09	99.74
7272	NASDAQ	CHK	Thu, Sep 1, 2022	98.78	100.37	97.10	98.02
7271	NASDAQ	CHK	Wed, Aug 31, 2022	95.17	101.66	94.85	100.49
7270	NASDAQ	CHK	Tue, Aug 30, 2022	100.28	100.84	95.71	97.89
7269	NASDAQ	CHK	Mon, Aug 29, 2022	102.39	105.50	101.50	103.77
7268	NASDAQ	CHK	Fri, Aug 26, 2022	103.85	105.55	103.00	103.66
7267	NASDAQ	CHK	Thu, Aug 25, 2022	104.16	104.45	102.93	103.80
7266	NASDAQ	CHK	Wed, Aug 24, 2022	100.95	104.04	99.73	103.75
7265	NASDAQ	CHK	Tue, Aug 23, 2022	102.00	103.64	98.95	100.37
7264	NASDAQ	CHK	Mon, Aug 22, 2022	97.95	100.34	94.97	100.16
7263	NASDAQ	CHK	Fri, Aug 19, 2022	100.10	100.27	96.33	96.33
7262	NASDAQ	CHK	Thu, Aug 18, 2022	99.00	102.29	99.00	102.25
7261	NASDAQ	CHK	Wed, Aug 17, 2022	97.37	98.92	96.23	98.33
7260	NASDAQ	CHK	Tue, Aug 16, 2022	95.05	97.60	93.89	97.00
7259	NASDAQ	CHK	Mon, Aug 15, 2022	95.06	96.72	92.50	95.90
7258	NASDAQ	CHK	Fri, Aug 12, 2022	97.22	98.41	96.07	98.21
7257	NASDAQ	CHK	Thu, Aug 11, 2022	96.50	97.35	94.32	97.31
7256	NASDAQ	CHK	Wed, Aug 10, 2022	94.40	94.65	91.53	94.00
7255	NASDAQ	CHK	Tue, Aug 9, 2022	94.50	96.85	94.19	94.63
7254	NASDAQ	CHK	Mon, Aug 8, 2022	91.86	94.04	91.71	92.81
7253	NASDAQ	CHK	Fri, Aug 5, 2022	87.17	92.58	86.50	92.00
7252	NASDAQ	CHK	Thu, Aug 4, 2022	90.71	91.74	87.57	88.02
7251	NASDAQ	CHK	Wed, Aug 3, 2022	92.67	95.37	87.81	91.53
7250	NASDAQ	CHK	Tue, Aug 2, 2022	90.33	91.21	88.63	90.25
7249	NASDAQ	CHK	Mon, Aug 1, 2022	92.19	92.19	88.42	90.42
7248	NASDAQ	CHK	Fri, Jul 29, 2022	93.53	94.79	93.10	94.17
7247	NASDAQ	CHK	Thu, Jul 28, 2022	93.32	93.89	90.24	92.89
7246	NASDAQ	CHK	Wed, Jul 27, 2022	92.05	93.00	90.50	92.39
7245	NASDAQ	CHK	Tue, Jul 26, 2022	94.38	94.55	92.13	92.19
7244	NASDAQ	CHK	Mon, Jul 25, 2022	90.94	93.21	89.94	92.31
7243	NASDAQ	CHK	Fri, Jul 22, 2022	90.86	92.52	89.64	89.75
7242	NASDAQ	CHK	Thu, Jul 21, 2022	88.00	91.15	87.83	91.06
7241	NASDAQ	CHK	Wed, Jul 20, 2022	87.50	92.00	86.89	91.86
7240	NASDAQ	CHK	Tue, Jul 19, 2022	86.23	88.68	85.82	88.63
7239	NASDAQ	CHK	Mon, Jul 18, 2022	85.89	87.99	85.52	86.72
7238	NASDAQ	CHK	Fri, Jul 15, 2022	81.32	83.21	78.80	83.18
7237	NASDAQ	CHK	Thu, Jul 14, 2022	79.29	80.45	75.23	79.00
7236	NASDAQ	CHK	Wed, Jul 13, 2022	78.15	84.34	78.15	82.58
7235	NASDAQ	CHK	Tue, Jul 12, 2022	76.61	79.37	76.52	78.70
7234	NASDAQ	CHK	Mon, Jul 11, 2022	78.62	80.66	77.83	79.22
7233	NASDAQ	CHK	Fri, Jul 8, 2022	79.28	80.27	77.75	78.45
7232	NASDAQ	CHK	Thu, Jul 7, 2022	76.81	79.26	76.58	78.50
7231	NASDAQ	CHK	Wed, Jul 6, 2022	76.46	77.71	72.50	74.34
7230	NASDAQ	CHK	Tue, Jul 5, 2022	80.07	80.58	75.02	76.71
7229	NASDAQ	CHK	Fri, Jul 1, 2022	81.69	83.40	79.98	82.90
7228	NASDAQ	CHK	Thu, Jun 30, 2022	85.00	87.72	80.23	81.10
7227	NASDAQ	CHK	Wed, Jun 29, 2022	90.16	90.67	86.64	87.01
7226	NASDAQ	CHK	Tue, Jun 28, 2022	88.83	90.16	87.32	88.64
7225	NASDAQ	CHK	Mon, Jun 27, 2022	84.27	86.32	82.66	85.20
7224	NASDAQ	CHK	Fri, Jun 24, 2022	77.19	83.92	76.01	83.80
7223	NASDAQ	CHK	Thu, Jun 23, 2022	83.56	83.75	75.02	76.34
7222	NASDAQ	CHK	Wed, Jun 22, 2022	80.22	85.50	79.16	82.79
7221	NASDAQ	CHK	Tue, Jun 21, 2022	82.80	85.09	82.34	83.55
7220	NASDAQ	CHK	Fri, Jun 17, 2022	83.23	84.40	78.00	80.28
7219	NASDAQ	CHK	Thu, Jun 16, 2022	86.16	87.85	83.64	84.35
7218	NASDAQ	CHK	Wed, Jun 15, 2022	87.99	91.05	86.43	88.25
7217	NASDAQ	CHK	Tue, Jun 14, 2022	95.74	96.45	86.79	87.65
7216	NASDAQ	CHK	Mon, Jun 13, 2022	95.01	96.13	91.42	93.37
7215	NASDAQ	CHK	Fri, Jun 10, 2022	96.73	98.73	95.03	98.17
7214	NASDAQ	CHK	Thu, Jun 9, 2022	97.77	99.76	95.02	97.98
7213	NASDAQ	CHK	Wed, Jun 8, 2022	102.98	103.95	97.89	99.54
7212	NASDAQ	CHK	Tue, Jun 7, 2022	98.78	103.30	98.57	102.56
7211	NASDAQ	CHK	Mon, Jun 6, 2022	99.35	100.10	98.51	99.75
7210	NASDAQ	CHK	Fri, Jun 3, 2022	98.22	98.95	96.77	98.79
7209	NASDAQ	CHK	Thu, Jun 2, 2022	99.71	100.50	96.55	98.04
7208	NASDAQ	CHK	Wed, Jun 1, 2022	98.93	100.74	96.72	100.00
7207	NASDAQ	CHK	Tue, May 31, 2022	104.57	105.00	95.29	97.38
7206	NASDAQ	CHK	Fri, May 27, 2022	99.70	103.92	98.72	103.15
7205	NASDAQ	CHK	Thu, May 26, 2022	99.73	101.10	98.89	100.20
7204	NASDAQ	CHK	Wed, May 25, 2022	99.00	102.20	98.32	99.25
7203	NASDAQ	CHK	Tue, May 24, 2022	94.89	98.37	94.30	97.87
7202	NASDAQ	CHK	Mon, May 23, 2022	92.03	96.22	90.29	95.87
7201	NASDAQ	CHK	Fri, May 20, 2022	87.86	91.76	87.42	91.13
7200	NASDAQ	CHK	Thu, May 19, 2022	84.93	88.93	84.93	87.12
7199	NASDAQ	CHK	Wed, May 18, 2022	87.71	88.43	85.53	86.63
7198	NASDAQ	CHK	Tue, May 17, 2022	90.16	90.57	88.13	90.48
7197	NASDAQ	CHK	Mon, May 16, 2022	87.16	90.03	87.05	89.03
7196	NASDAQ	CHK	Fri, May 13, 2022	85.36	88.39	84.19	85.89
7195	NASDAQ	CHK	Thu, May 12, 2022	85.78	85.78	82.16	84.49
7194	NASDAQ	CHK	Wed, May 11, 2022	85.77	89.45	84.67	86.23
7193	NASDAQ	CHK	Tue, May 10, 2022	84.70	88.94	82.07	83.80
7192	NASDAQ	CHK	Mon, May 9, 2022	90.60	91.53	83.60	84.70
7191	NASDAQ	CHK	Fri, May 6, 2022	97.10	97.49	91.50	93.15
7190	NASDAQ	CHK	Thu, May 5, 2022	92.99	95.95	89.84	95.57
7189	NASDAQ	CHK	Wed, May 4, 2022	91.14	96.50	89.11	94.98
7188	NASDAQ	CHK	Tue, May 3, 2022	83.31	89.58	83.02	88.59
7187	NASDAQ	CHK	Mon, May 2, 2022	81.00	83.47	80.44	82.76
7186	NASDAQ	CHK	Fri, Apr 29, 2022	84.82	85.35	81.60	82.02
7185	NASDAQ	CHK	Thu, Apr 28, 2022	84.18	85.62	81.69	84.46
7184	NASDAQ	CHK	Wed, Apr 27, 2022	84.36	84.73	81.68	84.00
7183	NASDAQ	CHK	Tue, Apr 26, 2022	84.03	85.92	82.67	83.10
7182	NASDAQ	CHK	Mon, Apr 25, 2022	84.14	85.24	81.22	84.09
7181	NASDAQ	CHK	Fri, Apr 22, 2022	90.69	91.41	85.34	86.53
7180	NASDAQ	CHK	Thu, Apr 21, 2022	92.89	93.20	89.36	91.14
7179	NASDAQ	CHK	Wed, Apr 20, 2022	92.15	93.16	91.40	92.88
7178	NASDAQ	CHK	Tue, Apr 19, 2022	93.76	94.19	90.49	91.65
7177	NASDAQ	CHK	Mon, Apr 18, 2022	95.37	97.61	94.61	94.92
7176	NASDAQ	CHK	Thu, Apr 14, 2022	93.83	95.28	92.78	94.36
7175	NASDAQ	CHK	Wed, Apr 13, 2022	92.35	94.10	92.00	93.60
7174	NASDAQ	CHK	Tue, Apr 12, 2022	93.07	94.34	91.02	91.20
7173	NASDAQ	CHK	Mon, Apr 11, 2022	92.01	92.75	90.59	91.60
7172	NASDAQ	CHK	Fri, Apr 8, 2022	91.13	92.90	90.82	92.17
7171	NASDAQ	CHK	Thu, Apr 7, 2022	91.65	92.73	87.35	90.61
7170	NASDAQ	CHK	Wed, Apr 6, 2022	88.80	91.76	87.58	90.03
7169	NASDAQ	CHK	Tue, Apr 5, 2022	90.25	91.21	88.30	88.67
7168	NASDAQ	CHK	Mon, Apr 4, 2022	91.77	91.80	87.42	88.98
7167	NASDAQ	CHK	Fri, Apr 1, 2022	88.07	90.76	87.82	90.00
7166	NASDAQ	CHK	Thu, Mar 31, 2022	87.93	90.73	86.70	87.00
7165	NASDAQ	CHK	Wed, Mar 30, 2022	88.06	90.21	87.48	88.11
7164	NASDAQ	CHK	Tue, Mar 29, 2022	84.44	87.01	83.18	86.81
7163	NASDAQ	CHK	Mon, Mar 28, 2022	87.19	90.12	86.77	87.95
7162	NASDAQ	CHK	Fri, Mar 25, 2022	86.07	90.58	85.86	89.32
7161	NASDAQ	CHK	Thu, Mar 24, 2022	84.52	87.28	84.00	87.00
7160	NASDAQ	CHK	Wed, Mar 23, 2022	81.28	84.98	80.56	84.06
7159	NASDAQ	CHK	Tue, Mar 22, 2022	81.06	81.26	78.30	80.51
7158	NASDAQ	CHK	Mon, Mar 21, 2022	80.40	81.92	79.20	81.06
7157	NASDAQ	CHK	Fri, Mar 18, 2022	78.21	79.00	77.51	78.51
7156	NASDAQ	CHK	Thu, Mar 17, 2022	79.18	79.59	78.07	79.01
7155	NASDAQ	CHK	Wed, Mar 16, 2022	75.79	77.75	75.73	77.01
7154	NASDAQ	CHK	Tue, Mar 15, 2022	73.50	76.34	73.26	75.46
7153	NASDAQ	CHK	Mon, Mar 14, 2022	79.02	79.05	74.78	76.26
7152	NASDAQ	CHK	Fri, Mar 11, 2022	80.01	82.33	79.10	80.55
7151	NASDAQ	CHK	Thu, Mar 10, 2022	81.34	81.87	80.41	80.86
7150	NASDAQ	CHK	Wed, Mar 9, 2022	79.39	82.46	78.13	80.88
7149	NASDAQ	CHK	Tue, Mar 8, 2022	87.00	87.90	82.17	82.46
7148	NASDAQ	CHK	Mon, Mar 7, 2022	85.81	88.75	83.18	85.89
7147	NASDAQ	CHK	Fri, Mar 4, 2022	78.33	85.21	78.33	85.00
7146	NASDAQ	CHK	Thu, Mar 3, 2022	78.70	80.69	78.07	80.28
7145	NASDAQ	CHK	Wed, Mar 2, 2022	80.00	80.46	78.11	79.37
7144	NASDAQ	CHK	Tue, Mar 1, 2022	77.54	79.35	76.70	79.27
7143	NASDAQ	CHK	Mon, Feb 28, 2022	75.05	77.59	74.57	77.25
7142	NASDAQ	CHK	Fri, Feb 25, 2022	71.39	75.86	71.35	75.08
7141	NASDAQ	CHK	Thu, Feb 24, 2022	70.96	73.58	66.50	70.91
7140	NASDAQ	CHK	Wed, Feb 23, 2022	67.15	69.71	66.96	68.50
7139	NASDAQ	CHK	Tue, Feb 22, 2022	67.45	67.79	64.81	66.35
7138	NASDAQ	CHK	Fri, Feb 18, 2022	66.28	67.28	65.73	65.78
7137	NASDAQ	CHK	Thu, Feb 17, 2022	66.49	68.36	65.98	66.82
7136	NASDAQ	CHK	Wed, Feb 16, 2022	68.60	69.64	65.93	66.57
7135	NASDAQ	CHK	Tue, Feb 15, 2022	66.61	68.65	66.27	68.27
7134	NASDAQ	CHK	Mon, Feb 14, 2022	69.13	69.98	67.14	67.77
7133	NASDAQ	CHK	Fri, Feb 11, 2022	67.33	69.60	66.76	69.15
7132	NASDAQ	CHK	Thu, Feb 10, 2022	65.01	67.14	65.01	65.62
7131	NASDAQ	CHK	Wed, Feb 9, 2022	65.52	66.19	64.95	65.68
7130	NASDAQ	CHK	Tue, Feb 8, 2022	66.50	67.15	64.51	65.72
7129	NASDAQ	CHK	Mon, Feb 7, 2022	66.21	67.53	65.86	66.79
7128	NASDAQ	CHK	Fri, Feb 4, 2022	68.00	69.11	66.69	66.98
7127	NASDAQ	CHK	Thu, Feb 3, 2022	68.59	69.29	67.09	67.69
7126	NASDAQ	CHK	Wed, Feb 2, 2022	70.00	71.28	67.88	69.50
7125	NASDAQ	CHK	Tue, Feb 1, 2022	67.66	69.25	67.44	68.47
7124	NASDAQ	CHK	Mon, Jan 31, 2022	68.23	69.04	67.43	68.17
7123	NASDAQ	CHK	Fri, Jan 28, 2022	69.09	70.31	67.65	68.39
7122	NASDAQ	CHK	Thu, Jan 27, 2022	70.35	70.70	66.88	69.12
7121	NASDAQ	CHK	Wed, Jan 26, 2022	68.84	70.57	67.20	68.43
7120	NASDAQ	CHK	Tue, Jan 25, 2022	64.15	67.95	63.31	67.13
7119	NASDAQ	CHK	Mon, Jan 24, 2022	61.54	63.83	61.45	63.76
7118	NASDAQ	CHK	Fri, Jan 21, 2022	63.94	64.58	62.32	63.04
7117	NASDAQ	CHK	Thu, Jan 20, 2022	66.79	68.29	64.62	64.79
7116	NASDAQ	CHK	Wed, Jan 19, 2022	69.67	70.65	66.93	67.53
7115	NASDAQ	CHK	Tue, Jan 18, 2022	73.00	73.19	68.77	69.47
7114	NASDAQ	CHK	Fri, Jan 14, 2022	70.47	71.67	69.68	71.52
7113	NASDAQ	CHK	Thu, Jan 13, 2022	73.33	73.41	69.89	70.10
7112	NASDAQ	CHK	Wed, Jan 12, 2022	70.88	73.66	69.53	73.11
7111	NASDAQ	CHK	Tue, Jan 11, 2022	70.31	70.89	68.32	69.89
7110	NASDAQ	CHK	Mon, Jan 10, 2022	68.99	71.36	68.51	70.20
7109	NASDAQ	CHK	Fri, Jan 7, 2022	67.28	69.69	66.72	69.30
7108	NASDAQ	CHK	Thu, Jan 6, 2022	65.99	67.41	65.20	66.74
7107	NASDAQ	CHK	Wed, Jan 5, 2022	68.78	69.50	65.14	65.19
7106	NASDAQ	CHK	Tue, Jan 4, 2022	66.90	68.80	66.40	66.78
7105	NASDAQ	CHK	Mon, Jan 3, 2022	64.90	66.70	64.73	66.55
7104	NASDAQ	CHK	Fri, Dec 31, 2021	64.30	64.83	63.67	64.52
7103	NASDAQ	CHK	Thu, Dec 30, 2021	65.40	66.15	64.16	64.35
7102	NASDAQ	CHK	Wed, Dec 29, 2021	65.81	66.05	65.15	65.57
7101	NASDAQ	CHK	Tue, Dec 28, 2021	66.00	66.26	65.30	65.96
7100	NASDAQ	CHK	Mon, Dec 27, 2021	63.13	65.86	62.13	65.85
7099	NASDAQ	CHK	Thu, Dec 23, 2021	62.65	63.94	62.50	63.18
7098	NASDAQ	CHK	Wed, Dec 22, 2021	61.52	63.38	61.45	62.41
7097	NASDAQ	CHK	Tue, Dec 21, 2021	60.76	62.65	60.22	61.63
7096	NASDAQ	CHK	Mon, Dec 20, 2021	59.64	60.83	58.83	60.10
7095	NASDAQ	CHK	Fri, Dec 17, 2021	61.29	62.24	60.06	60.76
7094	NASDAQ	CHK	Thu, Dec 16, 2021	63.13	63.13	61.24	61.36
7093	NASDAQ	CHK	Wed, Dec 15, 2021	61.40	61.66	60.15	60.94
7092	NASDAQ	CHK	Tue, Dec 14, 2021	61.34	63.23	60.77	61.73
7091	NASDAQ	CHK	Mon, Dec 13, 2021	62.85	63.80	61.82	61.91
7090	NASDAQ	CHK	Fri, Dec 10, 2021	64.02	64.20	62.71	63.80
7089	NASDAQ	CHK	Thu, Dec 9, 2021	63.46	64.00	62.89	63.32
7088	NASDAQ	CHK	Wed, Dec 8, 2021	63.43	64.79	62.69	64.46
7087	NASDAQ	CHK	Tue, Dec 7, 2021	60.06	63.45	60.05	63.18
7086	NASDAQ	CHK	Mon, Dec 6, 2021	61.44	61.44	58.19	59.79
7085	NASDAQ	CHK	Fri, Dec 3, 2021	61.24	62.17	59.62	60.33
7084	NASDAQ	CHK	Thu, Dec 2, 2021	58.60	60.97	57.84	60.88
7083	NASDAQ	CHK	Wed, Dec 1, 2021	61.42	61.55	56.75	57.00
7082	NASDAQ	CHK	Tue, Nov 30, 2021	60.37	60.74	58.93	59.54
7081	NASDAQ	CHK	Mon, Nov 29, 2021	64.35	64.78	61.19	61.37
7080	NASDAQ	CHK	Fri, Nov 26, 2021	63.18	64.75	61.25	63.92
7079	NASDAQ	CHK	Wed, Nov 24, 2021	63.28	64.77	63.28	64.68
7078	NASDAQ	CHK	Tue, Nov 23, 2021	61.24	64.23	61.14	63.94
7077	NASDAQ	CHK	Mon, Nov 22, 2021	61.74	62.57	61.15	61.22
7076	NASDAQ	CHK	Fri, Nov 19, 2021	62.68	63.22	61.03	61.74
7075	NASDAQ	CHK	Thu, Nov 18, 2021	63.53	64.47	63.10	64.23
7074	NASDAQ	CHK	Wed, Nov 17, 2021	62.48	64.28	62.10	63.75
7073	NASDAQ	CHK	Tue, Nov 16, 2021	62.65	63.01	61.99	62.29
7072	NASDAQ	CHK	Mon, Nov 15, 2021	63.66	63.83	61.41	62.41
7071	NASDAQ	CHK	Fri, Nov 12, 2021	63.87	64.51	62.76	62.92
7070	NASDAQ	CHK	Thu, Nov 11, 2021	63.40	65.15	63.10	64.44
7069	NASDAQ	CHK	Wed, Nov 10, 2021	66.90	66.99	62.76	63.10
7068	NASDAQ	CHK	Tue, Nov 9, 2021	65.90	67.94	65.54	67.37
7067	NASDAQ	CHK	Mon, Nov 8, 2021	66.35	66.44	65.34	66.22
7066	NASDAQ	CHK	Fri, Nov 5, 2021	66.15	66.65	65.28	65.82
7065	NASDAQ	CHK	Thu, Nov 4, 2021	68.28	68.99	65.53	65.60
7064	NASDAQ	CHK	Wed, Nov 3, 2021	66.51	69.38	64.85	67.55
7063	NASDAQ	CHK	Tue, Nov 2, 2021	65.21	65.72	64.65	65.37
7062	NASDAQ	CHK	Mon, Nov 1, 2021	64.25	66.18	64.25	65.79
7061	NASDAQ	CHK	Fri, Oct 29, 2021	66.70	66.70	62.72	63.74
7060	NASDAQ	CHK	Thu, Oct 28, 2021	66.10	67.70	65.39	66.28
7059	NASDAQ	CHK	Wed, Oct 27, 2021	67.60	68.44	66.14	66.21
7058	NASDAQ	CHK	Tue, Oct 26, 2021	67.97	69.40	67.15	67.58
7057	NASDAQ	CHK	Mon, Oct 25, 2021	64.41	68.37	63.74	67.75
7056	NASDAQ	CHK	Fri, Oct 22, 2021	61.49	62.22	60.85	62.07
7055	NASDAQ	CHK	Thu, Oct 21, 2021	61.82	62.22	60.50	61.43
7054	NASDAQ	CHK	Wed, Oct 20, 2021	61.43	62.67	60.83	62.31
7053	NASDAQ	CHK	Tue, Oct 19, 2021	62.96	63.15	61.52	61.82
7052	NASDAQ	CHK	Mon, Oct 18, 2021	62.80	63.89	62.47	63.19
7051	NASDAQ	CHK	Fri, Oct 15, 2021	65.24	65.24	62.54	62.75
7050	NASDAQ	CHK	Thu, Oct 14, 2021	63.01	64.16	62.49	64.01
7049	NASDAQ	CHK	Wed, Oct 13, 2021	61.90	62.82	61.13	62.05
7048	NASDAQ	CHK	Tue, Oct 12, 2021	62.39	63.33	61.64	62.10
7047	NASDAQ	CHK	Mon, Oct 11, 2021	67.15	67.41	62.72	62.73
7046	NASDAQ	CHK	Fri, Oct 8, 2021	65.38	66.09	64.53	65.78
7045	NASDAQ	CHK	Thu, Oct 7, 2021	64.03	65.42	63.33	64.75
7044	NASDAQ	CHK	Wed, Oct 6, 2021	66.17	66.19	63.17	63.97
7043	NASDAQ	CHK	Tue, Oct 5, 2021	65.76	67.00	64.51	66.92
7042	NASDAQ	CHK	Mon, Oct 4, 2021	63.11	65.25	62.93	64.64
7041	NASDAQ	CHK	Fri, Oct 1, 2021	62.29	62.76	61.45	62.08
7040	NASDAQ	CHK	Thu, Sep 30, 2021	61.15	62.35	60.29	61.59
7039	NASDAQ	CHK	Wed, Sep 29, 2021	61.75	62.15	60.64	60.86
7038	NASDAQ	CHK	Tue, Sep 28, 2021	63.42	64.00	61.83	62.10
7037	NASDAQ	CHK	Mon, Sep 27, 2021	60.06	62.62	60.06	62.48
7036	NASDAQ	CHK	Fri, Sep 24, 2021	60.23	61.05	58.54	58.59
7035	NASDAQ	CHK	Thu, Sep 23, 2021	58.60	60.92	58.49	60.47
7034	NASDAQ	CHK	Wed, Sep 22, 2021	59.20	59.59	58.28	58.56
7033	NASDAQ	CHK	Tue, Sep 21, 2021	60.01	60.16	58.03	58.26
7032	NASDAQ	CHK	Mon, Sep 20, 2021	59.67	61.50	58.76	59.72
7031	NASDAQ	CHK	Fri, Sep 17, 2021	61.36	62.05	60.14	61.07
7030	NASDAQ	CHK	Thu, Sep 16, 2021	62.60	63.11	61.02	61.19
7029	NASDAQ	CHK	Wed, Sep 15, 2021	62.69	65.36	62.69	62.98
7028	NASDAQ	CHK	Tue, Sep 14, 2021	63.02	63.33	61.32	61.69
7027	NASDAQ	CHK	Mon, Sep 13, 2021	60.56	62.67	60.46	62.66
7026	NASDAQ	CHK	Fri, Sep 10, 2021	61.36	61.43	59.51	59.54
7025	NASDAQ	CHK	Thu, Sep 9, 2021	60.79	62.16	60.27	60.57
7024	NASDAQ	CHK	Wed, Sep 8, 2021	60.00	61.45	59.83	60.88
7023	NASDAQ	CHK	Tue, Sep 7, 2021	59.02	60.76	59.02	59.83
7022	NASDAQ	CHK	Fri, Sep 3, 2021	58.81	59.19	57.84	59.03
7021	NASDAQ	CHK	Thu, Sep 2, 2021	57.00	58.79	56.76	58.29
7020	NASDAQ	CHK	Wed, Sep 1, 2021	55.78	56.69	55.44	56.61
7019	NASDAQ	CHK	Tue, Aug 31, 2021	54.75	55.95	54.75	55.81
7018	NASDAQ	CHK	Mon, Aug 30, 2021	55.61	55.66	54.64	54.79
7017	NASDAQ	CHK	Fri, Aug 27, 2021	53.51	56.50	53.41	55.38
7016	NASDAQ	CHK	Thu, Aug 26, 2021	52.87	53.29	52.37	53.11
7015	NASDAQ	CHK	Wed, Aug 25, 2021	52.61	53.34	51.92	53.03
7014	NASDAQ	CHK	Tue, Aug 24, 2021	52.51	53.02	51.59	52.70
7013	NASDAQ	CHK	Mon, Aug 23, 2021	52.76	53.26	51.92	52.25
7012	NASDAQ	CHK	Fri, Aug 20, 2021	51.41	53.09	51.40	52.67
7011	NASDAQ	CHK	Thu, Aug 19, 2021	51.26	52.12	50.71	51.97
7010	NASDAQ	CHK	Wed, Aug 18, 2021	54.67	54.80	52.40	52.42
7009	NASDAQ	CHK	Tue, Aug 17, 2021	55.25	56.87	54.25	54.77
7008	NASDAQ	CHK	Mon, Aug 16, 2021	56.07	56.75	54.34	55.83
7007	NASDAQ	CHK	Fri, Aug 13, 2021	59.03	59.04	56.45	56.79
7006	NASDAQ	CHK	Thu, Aug 12, 2021	57.08	59.30	56.66	58.81
7005	NASDAQ	CHK	Wed, Aug 11, 2021	56.76	57.82	55.35	56.94
7004	NASDAQ	CHK	Tue, Aug 10, 2021	54.12	55.82	53.81	55.50
7003	NASDAQ	CHK	Mon, Aug 9, 2021	54.60	54.74	53.85	54.06
7002	NASDAQ	CHK	Fri, Aug 6, 2021	54.57	55.36	54.44	55.04
7001	NASDAQ	CHK	Thu, Aug 5, 2021	54.56	55.12	53.84	54.21
7000	NASDAQ	CHK	Wed, Aug 4, 2021	53.90	55.50	53.24	54.48
6999	NASDAQ	CHK	Tue, Aug 3, 2021	53.20	54.82	52.74	54.57
6998	NASDAQ	CHK	Mon, Aug 2, 2021	53.98	55.20	53.17	53.30
6997	NASDAQ	CHK	Fri, Jul 30, 2021	55.25	55.54	53.67	54.05
6996	NASDAQ	CHK	Thu, Jul 29, 2021	55.91	55.92	54.88	55.34
6995	NASDAQ	CHK	Wed, Jul 28, 2021	55.13	55.89	54.73	55.44
6994	NASDAQ	CHK	Tue, Jul 27, 2021	54.87	55.32	54.43	54.96
6993	NASDAQ	CHK	Mon, Jul 26, 2021	54.99	55.89	54.51	55.18
6992	NASDAQ	CHK	Fri, Jul 23, 2021	54.23	54.81	53.45	54.79
6991	NASDAQ	CHK	Thu, Jul 22, 2021	52.90	54.63	52.37	53.98
6990	NASDAQ	CHK	Wed, Jul 21, 2021	51.32	53.30	50.77	52.96
6989	NASDAQ	CHK	Tue, Jul 20, 2021	48.86	51.10	48.64	50.81
6988	NASDAQ	CHK	Mon, Jul 19, 2021	49.50	50.10	48.19	48.90
6987	NASDAQ	CHK	Fri, Jul 16, 2021	51.02	51.41	48.83	50.14
6986	NASDAQ	CHK	Thu, Jul 15, 2021	50.35	51.27	50.00	50.72
6985	NASDAQ	CHK	Wed, Jul 14, 2021	54.05	54.34	50.80	50.84
6984	NASDAQ	CHK	Tue, Jul 13, 2021	54.69	54.83	53.77	53.81
6983	NASDAQ	CHK	Mon, Jul 12, 2021	54.51	55.02	53.82	54.74
6982	NASDAQ	CHK	Fri, Jul 9, 2021	54.95	54.95	54.12	54.81
6981	NASDAQ	CHK	Thu, Jul 8, 2021	53.79	54.79	53.33	54.61
6980	NASDAQ	CHK	Wed, Jul 7, 2021	53.66	54.68	52.67	54.26
6979	NASDAQ	CHK	Tue, Jul 6, 2021	54.60	54.60	52.70	53.86
6978	NASDAQ	CHK	Fri, Jul 2, 2021	54.01	54.92	53.50	54.59
6977	NASDAQ	CHK	Thu, Jul 1, 2021	52.82	54.18	52.39	53.99
6976	NASDAQ	CHK	Wed, Jun 30, 2021	49.60	52.03	49.59	51.92
6975	NASDAQ	CHK	Tue, Jun 29, 2021	51.30	52.32	49.21	49.55
6974	NASDAQ	CHK	Mon, Jun 28, 2021	53.10	53.39	50.74	51.00
6973	NASDAQ	CHK	Fri, Jun 25, 2021	53.22	53.56	52.69	53.13
6972	NASDAQ	CHK	Thu, Jun 24, 2021	52.84	54.20	52.39	53.09
6971	NASDAQ	CHK	Wed, Jun 23, 2021	53.88	54.28	52.61	52.93
6970	NASDAQ	CHK	Tue, Jun 22, 2021	55.21	55.21	52.86	53.61
6969	NASDAQ	CHK	Mon, Jun 21, 2021	53.54	55.21	52.89	55.08
6968	NASDAQ	CHK	Fri, Jun 18, 2021	53.08	53.80	52.72	53.11
6967	NASDAQ	CHK	Thu, Jun 17, 2021	53.92	54.07	52.01	53.76
6966	NASDAQ	CHK	Wed, Jun 16, 2021	55.96	56.36	53.84	54.09
6965	NASDAQ	CHK	Tue, Jun 15, 2021	56.99	56.99	55.43	55.96
6964	NASDAQ	CHK	Mon, Jun 14, 2021	56.15	56.71	55.46	55.83
6963	NASDAQ	CHK	Fri, Jun 11, 2021	55.92	56.54	55.39	56.22
6962	NASDAQ	CHK	Thu, Jun 10, 2021	55.71	55.83	54.76	55.58
6961	NASDAQ	CHK	Wed, Jun 9, 2021	55.60	55.84	54.51	55.43
6960	NASDAQ	CHK	Tue, Jun 8, 2021	55.05	55.93	54.23	55.51
6959	NASDAQ	CHK	Mon, Jun 7, 2021	55.59	56.07	54.62	55.54
6958	NASDAQ	CHK	Fri, Jun 4, 2021	53.57	54.65	52.88	54.43
6957	NASDAQ	CHK	Thu, Jun 3, 2021	53.39	53.89	52.48	53.48
6956	NASDAQ	CHK	Wed, Jun 2, 2021	55.00	55.00	53.20	53.42
6955	NASDAQ	CHK	Tue, Jun 1, 2021	53.57	54.99	53.13	54.88
6954	NASDAQ	CHK	Fri, May 28, 2021	53.00	53.20	52.28	52.80
6953	NASDAQ	CHK	Thu, May 27, 2021	53.25	53.25	51.54	52.95
6952	NASDAQ	CHK	Wed, May 26, 2021	50.43	53.10	50.07	52.80
6951	NASDAQ	CHK	Tue, May 25, 2021	50.47	51.17	49.91	50.44
6950	NASDAQ	CHK	Mon, May 24, 2021	50.70	50.93	49.83	50.55
6949	NASDAQ	CHK	Fri, May 21, 2021	50.44	50.72	49.68	50.43
6948	NASDAQ	CHK	Thu, May 20, 2021	50.90	51.38	50.32	50.49
6947	NASDAQ	CHK	Wed, May 19, 2021	50.41	51.25	50.01	51.00
6946	NASDAQ	CHK	Tue, May 18, 2021	50.80	52.00	50.60	51.30
6945	NASDAQ	CHK	Mon, May 17, 2021	48.97	50.40	48.81	49.99
6944	NASDAQ	CHK	Fri, May 14, 2021	49.00	49.82	48.72	48.87
6943	NASDAQ	CHK	Thu, May 13, 2021	49.49	50.59	48.19	49.50
6942	NASDAQ	CHK	Wed, May 12, 2021	52.68	52.68	48.28	49.48
6941	NASDAQ	CHK	Tue, May 11, 2021	49.17	49.73	48.16	49.06
6940	NASDAQ	CHK	Mon, May 10, 2021	49.63	49.97	49.25	49.57
6939	NASDAQ	CHK	Fri, May 7, 2021	47.16	49.50	47.16	49.17
6938	NASDAQ	CHK	Thu, May 6, 2021	46.69	47.83	46.69	47.51
6937	NASDAQ	CHK	Wed, May 5, 2021	46.23	47.63	46.10	46.74
6936	NASDAQ	CHK	Tue, May 4, 2021	46.50	46.50	45.60	46.00
6935	NASDAQ	CHK	Mon, May 3, 2021	45.97	46.62	45.41	46.36
6934	NASDAQ	CHK	Fri, Apr 30, 2021	46.51	47.48	45.32	45.57
6933	NASDAQ	CHK	Thu, Apr 29, 2021	46.42	48.50	45.79	46.95
6932	NASDAQ	CHK	Wed, Apr 28, 2021	47.15	47.32	45.94	46.18
6931	NASDAQ	CHK	Tue, Apr 27, 2021	46.65	47.50	46.38	46.87
6930	NASDAQ	CHK	Mon, Apr 26, 2021	46.34	47.46	46.27	46.88
6929	NASDAQ	CHK	Fri, Apr 23, 2021	46.05	47.22	45.42	46.46
6928	NASDAQ	CHK	Thu, Apr 22, 2021	46.27	46.90	45.85	46.08
6927	NASDAQ	CHK	Wed, Apr 21, 2021	45.54	46.59	44.78	46.24
6926	NASDAQ	CHK	Tue, Apr 20, 2021	45.97	46.31	44.31	45.71
6925	NASDAQ	CHK	Mon, Apr 19, 2021	45.71	46.63	45.41	45.97
6924	NASDAQ	CHK	Fri, Apr 16, 2021	46.70	46.89	45.33	45.65
6923	NASDAQ	CHK	Thu, Apr 15, 2021	46.16	46.58	45.35	46.19
6922	NASDAQ	CHK	Wed, Apr 14, 2021	45.67	46.31	45.25	46.19
6921	NASDAQ	CHK	Tue, Apr 13, 2021	45.35	45.82	45.32	45.51
6920	NASDAQ	CHK	Mon, Apr 12, 2021	45.67	45.92	45.25	45.45
6919	NASDAQ	CHK	Fri, Apr 9, 2021	45.20	45.91	44.48	45.54
6918	NASDAQ	CHK	Thu, Apr 8, 2021	44.99	45.82	44.77	45.33
6917	NASDAQ	CHK	Wed, Apr 7, 2021	45.11	46.00	44.40	45.10
6916	NASDAQ	CHK	Tue, Apr 6, 2021	45.01	45.95	44.05	45.21
6915	NASDAQ	CHK	Mon, Apr 5, 2021	44.82	45.16	43.50	44.66
6914	NASDAQ	CHK	Thu, Apr 1, 2021	43.09	45.80	42.83	44.93
6913	NASDAQ	CHK	Wed, Mar 31, 2021	43.03	44.52	42.19	43.39
6912	NASDAQ	CHK	Tue, Mar 30, 2021	42.27	43.40	41.29	43.14
6911	NASDAQ	CHK	Mon, Mar 29, 2021	43.40	43.51	42.34	42.52
6910	NASDAQ	CHK	Fri, Mar 26, 2021	42.27	43.34	42.14	43.33
6909	NASDAQ	CHK	Thu, Mar 25, 2021	41.15	42.33	40.00	42.16
6908	NASDAQ	CHK	Wed, Mar 24, 2021	42.50	42.80	41.28	41.60
6907	NASDAQ	CHK	Tue, Mar 23, 2021	42.28	42.72	41.04	41.70
6906	NASDAQ	CHK	Mon, Mar 22, 2021	43.23	43.50	41.92	42.75
6905	NASDAQ	CHK	Fri, Mar 19, 2021	43.30	43.76	42.80	43.31
6904	NASDAQ	CHK	Thu, Mar 18, 2021	44.92	45.25	43.22	43.50
6903	NASDAQ	CHK	Wed, Mar 17, 2021	44.87	45.60	44.20	45.28
6902	NASDAQ	CHK	Tue, Mar 16, 2021	45.78	45.88	43.95	44.81
6901	NASDAQ	CHK	Mon, Mar 15, 2021	45.92	46.25	45.10	45.75
6900	NASDAQ	CHK	Fri, Mar 12, 2021	46.13	46.31	44.89	45.75
6899	NASDAQ	CHK	Thu, Mar 11, 2021	44.75	45.82	44.51	45.34
6898	NASDAQ	CHK	Wed, Mar 10, 2021	44.26	44.87	43.77	44.75
6897	NASDAQ	CHK	Tue, Mar 9, 2021	43.69	44.94	43.62	44.28
6896	NASDAQ	CHK	Mon, Mar 8, 2021	44.69	45.13	43.01	44.37
6895	NASDAQ	CHK	Fri, Mar 5, 2021	47.00	47.08	44.02	45.03
6894	NASDAQ	CHK	Thu, Mar 4, 2021	47.66	48.79	45.79	46.18
6893	NASDAQ	CHK	Wed, Mar 3, 2021	45.51	47.64	45.22	47.25
6892	NASDAQ	CHK	Tue, Mar 2, 2021	44.67	46.75	44.67	45.30
6891	NASDAQ	CHK	Mon, Mar 1, 2021	44.45	45.28	44.08	44.67
6890	NASDAQ	CHK	Fri, Feb 26, 2021	44.56	44.94	43.42	44.18
6889	NASDAQ	CHK	Thu, Feb 25, 2021	45.32	45.50	44.10	44.75
6888	NASDAQ	CHK	Wed, Feb 24, 2021	43.24	45.08	42.64	45.00
6887	NASDAQ	CHK	Tue, Feb 23, 2021	43.95	43.95	42.00	43.66
6886	NASDAQ	CHK	Mon, Feb 22, 2021	44.84	45.03	43.65	43.84
6885	NASDAQ	CHK	Fri, Feb 19, 2021	43.66	44.63	43.01	44.00
6884	NASDAQ	CHK	Thu, Feb 18, 2021	44.24	45.00	42.78	43.00
6883	NASDAQ	CHK	Wed, Feb 17, 2021	44.03	44.60	43.50	44.26
6882	NASDAQ	CHK	Tue, Feb 16, 2021	44.20	45.54	43.01	43.55
6881	NASDAQ	CHK	Fri, Feb 12, 2021	43.01	43.50	41.55	42.51
6880	NASDAQ	CHK	Thu, Feb 11, 2021	45.47	45.47	42.75	42.80
6879	NASDAQ	CHK	Wed, Feb 10, 2021	43.00	50.00	43.00	44.99
6878	NASDAQ	CHK	Mon, Jun 29, 2020	0.00	0.00	0.00	11.85
6877	NASDAQ	CHK	Fri, Jun 26, 2020	12.31	12.92	11.55	11.85
6876	NASDAQ	CHK	Thu, Jun 25, 2020	11.64	14.50	11.42	12.78
6875	NASDAQ	CHK	Wed, Jun 24, 2020	12.01	12.18	11.26	11.71
6874	NASDAQ	CHK	Tue, Jun 23, 2020	12.96	12.96	12.26	12.26
6873	NASDAQ	CHK	Mon, Jun 22, 2020	12.83	13.49	11.30	12.34
6872	NASDAQ	CHK	Fri, Jun 19, 2020	14.96	15.10	12.77	12.77
6871	NASDAQ	CHK	Thu, Jun 18, 2020	12.77	14.48	12.59	12.95
6870	NASDAQ	CHK	Wed, Jun 17, 2020	15.00	15.00	12.75	13.24
6869	NASDAQ	CHK	Tue, Jun 16, 2020	17.12	17.22	14.62	15.36
6868	NASDAQ	CHK	Mon, Jun 15, 2020	18.75	19.85	17.65	18.87
6867	NASDAQ	CHK	Fri, Jun 12, 2020	23.00	24.42	18.00	19.23
6866	NASDAQ	CHK	Thu, Jun 11, 2020	14.91	23.05	14.06	17.64
6865	NASDAQ	CHK	Wed, Jun 10, 2020	20.20	21.00	16.00	16.81
6864	NASDAQ	CHK	Tue, Jun 9, 2020	19.20	34.00	18.41	23.75
6863	NASDAQ	CHK	Mon, Jun 8, 2020	40.26	77.50	36.25	69.92
6862	NASDAQ	CHK	Fri, Jun 5, 2020	15.60	25.95	15.23	24.80
6861	NASDAQ	CHK	Thu, Jun 4, 2020	13.11	14.59	12.50	14.05
6860	NASDAQ	CHK	Wed, Jun 3, 2020	13.22	13.49	12.88	13.11
6859	NASDAQ	CHK	Tue, Jun 2, 2020	13.43	13.43	12.50	12.83
6858	NASDAQ	CHK	Mon, Jun 1, 2020	12.91	13.49	12.82	13.01
6857	NASDAQ	CHK	Fri, May 29, 2020	13.17	13.46	12.47	13.01
6856	NASDAQ	CHK	Thu, May 28, 2020	13.59	14.30	13.09	13.31
6855	NASDAQ	CHK	Wed, May 27, 2020	14.06	14.21	13.01	13.81
6854	NASDAQ	CHK	Tue, May 26, 2020	14.50	15.50	13.75	13.86
6853	NASDAQ	CHK	Fri, May 22, 2020	14.08	14.26	12.75	13.71
6852	NASDAQ	CHK	Thu, May 21, 2020	13.72	15.17	13.67	14.16
6851	NASDAQ	CHK	Wed, May 20, 2020	12.20	14.09	12.20	13.25
6850	NASDAQ	CHK	Tue, May 19, 2020	12.83	12.83	11.11	11.97
6849	NASDAQ	CHK	Mon, May 18, 2020	12.99	13.30	11.75	12.49
6848	NASDAQ	CHK	Fri, May 15, 2020	8.42	12.44	8.37	10.79
6847	NASDAQ	CHK	Thu, May 14, 2020	8.98	9.09	7.77	8.71
6846	NASDAQ	CHK	Wed, May 13, 2020	10.53	10.55	9.60	9.60
6845	NASDAQ	CHK	Tue, May 12, 2020	12.58	12.70	10.00	10.98
6844	NASDAQ	CHK	Mon, May 11, 2020	14.46	14.77	12.71	12.90
6843	NASDAQ	CHK	Fri, May 8, 2020	14.91	15.05	13.88	14.70
6842	NASDAQ	CHK	Thu, May 7, 2020	15.01	15.44	14.55	14.60
6841	NASDAQ	CHK	Wed, May 6, 2020	16.00	16.70	14.30	14.85
6840	NASDAQ	CHK	Tue, May 5, 2020	17.13	18.34	15.26	15.47
6839	NASDAQ	CHK	Mon, May 4, 2020	14.31	16.63	14.00	15.57
6838	NASDAQ	CHK	Fri, May 1, 2020	16.86	16.90	14.41	14.98
6837	NASDAQ	CHK	Thu, Apr 30, 2020	24.17	24.17	14.32	17.50
6836	NASDAQ	CHK	Wed, Apr 29, 2020	31.88	32.22	25.00	26.85
6835	NASDAQ	CHK	Tue, Apr 28, 2020	32.47	32.87	28.82	29.18
6834	NASDAQ	CHK	Mon, Apr 27, 2020	34.05	34.49	26.00	31.50
6833	NASDAQ	CHK	Fri, Apr 24, 2020	34.61	41.50	32.68	39.94
6832	NASDAQ	CHK	Thu, Apr 23, 2020	21.98	31.96	21.86	27.49
6831	NASDAQ	CHK	Wed, Apr 22, 2020	18.28	20.70	17.32	20.18
6830	NASDAQ	CHK	Tue, Apr 21, 2020	13.57	18.40	13.55	17.77
6829	NASDAQ	CHK	Mon, Apr 20, 2020	13.01	15.00	12.30	14.38
6828	NASDAQ	CHK	Fri, Apr 17, 2020	15.70	16.19	14.21	14.45
6827	NASDAQ	CHK	Thu, Apr 16, 2020	16.38	18.79	15.37	15.56
6826	NASDAQ	CHK	Wed, Apr 15, 2020	19.41	19.49	15.58	16.38
6825	NASDAQ	CHK	Tue, Apr 14, 2020	0.15	0.15	0.13	26.24
6824	NASDAQ	CHK	Mon, Apr 13, 2020	0.18	0.18	0.15	0.16
6823	NASDAQ	CHK	Thu, Apr 9, 2020	0.18	0.21	0.17	0.17
6822	NASDAQ	CHK	Wed, Apr 8, 2020	0.16	0.17	0.16	0.17
6821	NASDAQ	CHK	Tue, Apr 7, 2020	0.17	0.17	0.16	0.16
6820	NASDAQ	CHK	Mon, Apr 6, 2020	0.17	0.17	0.16	0.17
6819	NASDAQ	CHK	Fri, Apr 3, 2020	0.18	0.18	0.16	0.17
6818	NASDAQ	CHK	Thu, Apr 2, 2020	0.16	0.18	0.15	0.17
6817	NASDAQ	CHK	Wed, Apr 1, 2020	0.16	0.17	0.15	0.15
6816	NASDAQ	CHK	Tue, Mar 31, 2020	0.17	0.18	0.16	0.17
6815	NASDAQ	CHK	Mon, Mar 30, 2020	0.17	0.17	0.15	0.17
6814	NASDAQ	CHK	Fri, Mar 27, 2020	0.19	0.19	0.17	0.17
6813	NASDAQ	CHK	Thu, Mar 26, 2020	0.20	0.20	0.18	0.19
6812	NASDAQ	CHK	Wed, Mar 25, 2020	0.20	0.20	0.18	0.19
6811	NASDAQ	CHK	Tue, Mar 24, 2020	0.18	0.21	0.17	0.20
6810	NASDAQ	CHK	Mon, Mar 23, 2020	0.18	0.19	0.17	0.18
6809	NASDAQ	CHK	Fri, Mar 20, 2020	0.19	0.20	0.18	0.19
6808	NASDAQ	CHK	Thu, Mar 19, 2020	0.18	0.20	0.17	0.19
6807	NASDAQ	CHK	Wed, Mar 18, 2020	0.19	0.20	0.17	0.18
6806	NASDAQ	CHK	Tue, Mar 17, 2020	0.20	0.23	0.18	0.21
6805	NASDAQ	CHK	Mon, Mar 16, 2020	0.19	0.23	0.17	0.20
6804	NASDAQ	CHK	Fri, Mar 13, 2020	0.18	0.30	0.15	0.30
6803	NASDAQ	CHK	Thu, Mar 12, 2020	0.14	0.20	0.13	0.15
6802	NASDAQ	CHK	Wed, Mar 11, 2020	0.16	0.16	0.14	0.15
6801	NASDAQ	CHK	Tue, Mar 10, 2020	0.18	0.19	0.15	0.16
6800	NASDAQ	CHK	Mon, Mar 9, 2020	0.15	0.20	0.12	0.16
6799	NASDAQ	CHK	Fri, Mar 6, 2020	0.22	0.22	0.20	0.22
6798	NASDAQ	CHK	Thu, Mar 5, 2020	0.25	0.25	0.22	0.23
6797	NASDAQ	CHK	Wed, Mar 4, 2020	0.27	0.28	0.23	0.25
6796	NASDAQ	CHK	Tue, Mar 3, 2020	0.25	0.27	0.24	0.25
6795	NASDAQ	CHK	Mon, Mar 2, 2020	0.29	0.30	0.22	0.22
6794	NASDAQ	CHK	Fri, Feb 28, 2020	0.23	0.28	0.20	0.28
6793	NASDAQ	CHK	Thu, Feb 27, 2020	0.27	0.29	0.25	0.26
6792	NASDAQ	CHK	Wed, Feb 26, 2020	0.43	0.43	0.30	0.31
6791	NASDAQ	CHK	Tue, Feb 25, 2020	0.45	0.46	0.41	0.44
6790	NASDAQ	CHK	Mon, Feb 24, 2020	0.42	0.47	0.40	0.44
6789	NASDAQ	CHK	Fri, Feb 21, 2020	0.47	0.47	0.45	0.45
6788	NASDAQ	CHK	Thu, Feb 20, 2020	0.48	0.50	0.48	0.48
6787	NASDAQ	CHK	Wed, Feb 19, 2020	0.44	0.48	0.43	0.48
6786	NASDAQ	CHK	Tue, Feb 18, 2020	0.47	0.47	0.43	0.44
6785	NASDAQ	CHK	Fri, Feb 14, 2020	0.49	0.49	0.45	0.45
6784	NASDAQ	CHK	Thu, Feb 13, 2020	0.51	0.52	0.48	0.49
6783	NASDAQ	CHK	Wed, Feb 12, 2020	0.52	0.53	0.50	0.50
6782	NASDAQ	CHK	Tue, Feb 11, 2020	0.51	0.52	0.50	0.50
6781	NASDAQ	CHK	Mon, Feb 10, 2020	0.51	0.52	0.50	0.50
6780	NASDAQ	CHK	Fri, Feb 7, 2020	0.55	0.55	0.51	0.51
6779	NASDAQ	CHK	Thu, Feb 6, 2020	0.56	0.56	0.54	0.54
6778	NASDAQ	CHK	Wed, Feb 5, 2020	0.52	0.56	0.51	0.56
6777	NASDAQ	CHK	Tue, Feb 4, 2020	0.52	0.52	0.51	0.51
6776	NASDAQ	CHK	Mon, Feb 3, 2020	0.51	0.53	0.51	0.51
6775	NASDAQ	CHK	Fri, Jan 31, 2020	0.52	0.56	0.51	0.51
6774	NASDAQ	CHK	Thu, Jan 30, 2020	0.53	0.55	0.51	0.53
6773	NASDAQ	CHK	Wed, Jan 29, 2020	0.57	0.58	0.53	0.54
6772	NASDAQ	CHK	Tue, Jan 28, 2020	0.54	0.55	0.51	0.52
6771	NASDAQ	CHK	Mon, Jan 27, 2020	0.54	0.55	0.53	0.53
6770	NASDAQ	CHK	Fri, Jan 24, 2020	0.58	0.58	0.55	0.56
6769	NASDAQ	CHK	Thu, Jan 23, 2020	0.58	0.59	0.57	0.57
6768	NASDAQ	CHK	Wed, Jan 22, 2020	0.59	0.61	0.56	0.59
6767	NASDAQ	CHK	Tue, Jan 21, 2020	0.66	0.66	0.60	0.60
6766	NASDAQ	CHK	Fri, Jan 17, 2020	0.70	0.70	0.66	0.66
6765	NASDAQ	CHK	Thu, Jan 16, 2020	0.69	0.74	0.69	0.69
6764	NASDAQ	CHK	Wed, Jan 15, 2020	0.68	0.69	0.66	0.68
6763	NASDAQ	CHK	Tue, Jan 14, 2020	0.69	0.71	0.67	0.67
6762	NASDAQ	CHK	Mon, Jan 13, 2020	0.70	0.72	0.67	0.68
6761	NASDAQ	CHK	Fri, Jan 10, 2020	0.80	0.80	0.73	0.73
6760	NASDAQ	CHK	Thu, Jan 9, 2020	0.83	0.84	0.76	0.79
6759	NASDAQ	CHK	Wed, Jan 8, 2020	0.90	0.90	0.82	0.83
6758	NASDAQ	CHK	Tue, Jan 7, 2020	0.86	0.91	0.83	0.90
6757	NASDAQ	CHK	Mon, Jan 6, 2020	0.95	0.95	0.86	0.87
6756	NASDAQ	CHK	Fri, Jan 3, 2020	0.94	0.96	0.90	0.92
6755	NASDAQ	CHK	Thu, Jan 2, 2020	0.84	0.87	0.82	0.86
6754	NASDAQ	CHK	Tue, Dec 31, 2019	0.82	0.84	0.79	0.83
6753	NASDAQ	CHK	Mon, Dec 30, 2019	0.88	0.90	0.81	0.83
6752	NASDAQ	CHK	Fri, Dec 27, 2019	0.95	0.95	0.81	0.85
6751	NASDAQ	CHK	Thu, Dec 26, 2019	0.95	0.97	0.94	0.94
6750	NASDAQ	CHK	Tue, Dec 24, 2019	0.95	0.97	0.94	0.94
6749	NASDAQ	CHK	Mon, Dec 23, 2019	0.93	0.96	0.90	0.95
6748	NASDAQ	CHK	Fri, Dec 20, 2019	0.95	0.98	0.87	0.95
6747	NASDAQ	CHK	Thu, Dec 19, 2019	0.93	0.98	0.91	0.92
6746	NASDAQ	CHK	Wed, Dec 18, 2019	0.81	0.93	0.81	0.90
6745	NASDAQ	CHK	Tue, Dec 17, 2019	0.77	0.82	0.77	0.82
6744	NASDAQ	CHK	Mon, Dec 16, 2019	0.78	0.80	0.76	0.77
6743	NASDAQ	CHK	Fri, Dec 13, 2019	0.81	0.82	0.77	0.79
6742	NASDAQ	CHK	Thu, Dec 12, 2019	0.75	0.80	0.75	0.78
6741	NASDAQ	CHK	Wed, Dec 11, 2019	0.78	0.79	0.72	0.75
6740	NASDAQ	CHK	Tue, Dec 10, 2019	0.80	0.85	0.76	0.78
6739	NASDAQ	CHK	Mon, Dec 9, 2019	0.76	0.79	0.74	0.79
6738	NASDAQ	CHK	Fri, Dec 6, 2019	0.73	0.77	0.72	0.76
6737	NASDAQ	CHK	Thu, Dec 5, 2019	0.76	0.81	0.70	0.72
6736	NASDAQ	CHK	Wed, Dec 4, 2019	0.70	0.75	0.69	0.74
6735	NASDAQ	CHK	Tue, Dec 3, 2019	0.60	0.65	0.59	0.64
6734	NASDAQ	CHK	Mon, Dec 2, 2019	0.60	0.62	0.59	0.61
6733	NASDAQ	CHK	Fri, Nov 29, 2019	0.61	0.62	0.58	0.60
6732	NASDAQ	CHK	Wed, Nov 27, 2019	0.60	0.63	0.59	0.62
6731	NASDAQ	CHK	Tue, Nov 26, 2019	0.60	0.64	0.58	0.60
6730	NASDAQ	CHK	Mon, Nov 25, 2019	0.58	0.59	0.57	0.58
6729	NASDAQ	CHK	Fri, Nov 22, 2019	0.59	0.60	0.58	0.59
6728	NASDAQ	CHK	Thu, Nov 21, 2019	0.58	0.60	0.56	0.58
6727	NASDAQ	CHK	Wed, Nov 20, 2019	0.57	0.60	0.55	0.57
6726	NASDAQ	CHK	Tue, Nov 19, 2019	0.64	0.64	0.55	0.56
6725	NASDAQ	CHK	Mon, Nov 18, 2019	0.69	0.69	0.63	0.64
6724	NASDAQ	CHK	Fri, Nov 15, 2019	0.70	0.71	0.69	0.70
6723	NASDAQ	CHK	Thu, Nov 14, 2019	0.71	0.73	0.67	0.69
6722	NASDAQ	CHK	Wed, Nov 13, 2019	0.80	0.80	0.69	0.70
6721	NASDAQ	CHK	Tue, Nov 12, 2019	0.82	0.82	0.64	0.67
6720	NASDAQ	CHK	Mon, Nov 11, 2019	0.90	0.91	0.81	0.81
6719	NASDAQ	CHK	Fri, Nov 8, 2019	0.93	0.95	0.90	0.90
6718	NASDAQ	CHK	Thu, Nov 7, 2019	0.97	0.98	0.89	0.91
6717	NASDAQ	CHK	Wed, Nov 6, 2019	1.29	1.30	0.79	0.91
6716	NASDAQ	CHK	Tue, Nov 5, 2019	1.32	1.41	1.28	1.28
6715	NASDAQ	CHK	Mon, Nov 4, 2019	1.48	1.59	1.47	1.56
6714	NASDAQ	CHK	Fri, Nov 1, 2019	1.35	1.50	1.35	1.44
6713	NASDAQ	CHK	Thu, Oct 31, 2019	1.41	1.42	1.33	1.34
6712	NASDAQ	CHK	Wed, Oct 30, 2019	1.49	1.50	1.40	1.40
6711	NASDAQ	CHK	Tue, Oct 29, 2019	1.45	1.52	1.40	1.47
6710	NASDAQ	CHK	Mon, Oct 28, 2019	1.54	1.59	1.47	1.47
6709	NASDAQ	CHK	Fri, Oct 25, 2019	1.46	1.57	1.44	1.56
6708	NASDAQ	CHK	Thu, Oct 24, 2019	1.42	1.48	1.39	1.48
6707	NASDAQ	CHK	Wed, Oct 23, 2019	1.34	1.43	1.32	1.43
6706	NASDAQ	CHK	Tue, Oct 22, 2019	1.36	1.37	1.31	1.35
6705	NASDAQ	CHK	Mon, Oct 21, 2019	1.27	1.37	1.26	1.36
6704	NASDAQ	CHK	Fri, Oct 18, 2019	1.29	1.32	1.28	1.29
6703	NASDAQ	CHK	Thu, Oct 17, 2019	1.33	1.33	1.28	1.31
6702	NASDAQ	CHK	Wed, Oct 16, 2019	1.34	1.38	1.31	1.31
6701	NASDAQ	CHK	Tue, Oct 15, 2019	1.34	1.39	1.31	1.34
6700	NASDAQ	CHK	Mon, Oct 14, 2019	1.36	1.36	1.30	1.34
6699	NASDAQ	CHK	Fri, Oct 11, 2019	1.32	1.41	1.31	1.39
6698	NASDAQ	CHK	Thu, Oct 10, 2019	1.28	1.31	1.26	1.29
6697	NASDAQ	CHK	Wed, Oct 9, 2019	1.31	1.31	1.27	1.27
6696	NASDAQ	CHK	Tue, Oct 8, 2019	1.31	1.32	1.28	1.28
6695	NASDAQ	CHK	Mon, Oct 7, 2019	1.35	1.37	1.31	1.33
6694	NASDAQ	CHK	Fri, Oct 4, 2019	1.36	1.39	1.31	1.36
6693	NASDAQ	CHK	Thu, Oct 3, 2019	1.31	1.38	1.28	1.36
6692	NASDAQ	CHK	Wed, Oct 2, 2019	1.33	1.36	1.29	1.32
6691	NASDAQ	CHK	Tue, Oct 1, 2019	1.43	1.46	1.33	1.33
6690	NASDAQ	CHK	Mon, Sep 30, 2019	1.39	1.42	1.37	1.41
6689	NASDAQ	CHK	Fri, Sep 27, 2019	1.38	1.47	1.37	1.40
6688	NASDAQ	CHK	Thu, Sep 26, 2019	1.43	1.43	1.36	1.41
6687	NASDAQ	CHK	Wed, Sep 25, 2019	1.39	1.45	1.38	1.42
6686	NASDAQ	CHK	Tue, Sep 24, 2019	1.53	1.53	1.40	1.43
6685	NASDAQ	CHK	Mon, Sep 23, 2019	1.58	1.61	1.52	1.52
6684	NASDAQ	CHK	Fri, Sep 20, 2019	1.66	1.66	1.55	1.58
6683	NASDAQ	CHK	Thu, Sep 19, 2019	1.65	1.66	1.62	1.64
6682	NASDAQ	CHK	Wed, Sep 18, 2019	1.77	1.78	1.58	1.59
6681	NASDAQ	CHK	Tue, Sep 17, 2019	2.03	2.04	1.77	1.77
6680	NASDAQ	CHK	Mon, Sep 16, 2019	2.06	2.15	1.92	2.06
6679	NASDAQ	CHK	Fri, Sep 13, 2019	1.82	1.87	1.74	1.78
6678	NASDAQ	CHK	Thu, Sep 12, 2019	1.79	1.81	1.70	1.79
6677	NASDAQ	CHK	Wed, Sep 11, 2019	1.87	1.98	1.75	1.83
6676	NASDAQ	CHK	Tue, Sep 10, 2019	1.82	2.00	1.77	1.83
6675	NASDAQ	CHK	Mon, Sep 9, 2019	1.61	1.90	1.60	1.89
6674	NASDAQ	CHK	Fri, Sep 6, 2019	1.54	1.60	1.50	1.58
6673	NASDAQ	CHK	Thu, Sep 5, 2019	1.49	1.60	1.48	1.60
6672	NASDAQ	CHK	Wed, Sep 4, 2019	1.43	1.47	1.40	1.47
6671	NASDAQ	CHK	Tue, Sep 3, 2019	1.40	1.41	1.33	1.38
6670	NASDAQ	CHK	Fri, Aug 30, 2019	1.52	1.53	1.41	1.44
6669	NASDAQ	CHK	Thu, Aug 29, 2019	1.50	1.57	1.48	1.54
6668	NASDAQ	CHK	Wed, Aug 28, 2019	1.43	1.47	1.40	1.47
6667	NASDAQ	CHK	Tue, Aug 27, 2019	1.49	1.50	1.33	1.39
6666	NASDAQ	CHK	Mon, Aug 26, 2019	1.52	1.53	1.48	1.49
6665	NASDAQ	CHK	Fri, Aug 23, 2019	1.54	1.57	1.44	1.47
6664	NASDAQ	CHK	Thu, Aug 22, 2019	1.65	1.66	1.58	1.61
6663	NASDAQ	CHK	Wed, Aug 21, 2019	1.64	1.72	1.60	1.62
6662	NASDAQ	CHK	Tue, Aug 20, 2019	1.57	1.60	1.51	1.59
6661	NASDAQ	CHK	Mon, Aug 19, 2019	1.42	1.60	1.41	1.60
6660	NASDAQ	CHK	Fri, Aug 16, 2019	1.31	1.39	1.29	1.39
6659	NASDAQ	CHK	Thu, Aug 15, 2019	1.38	1.38	1.28	1.29
6658	NASDAQ	CHK	Wed, Aug 14, 2019	1.40	1.40	1.32	1.35
6657	NASDAQ	CHK	Tue, Aug 13, 2019	1.38	1.50	1.37	1.45
6656	NASDAQ	CHK	Mon, Aug 12, 2019	1.43	1.44	1.37	1.40
6655	NASDAQ	CHK	Fri, Aug 9, 2019	1.46	1.50	1.41	1.44
6654	NASDAQ	CHK	Thu, Aug 8, 2019	1.42	1.48	1.39	1.47
6653	NASDAQ	CHK	Wed, Aug 7, 2019	1.36	1.40	1.26	1.39
6652	NASDAQ	CHK	Tue, Aug 6, 2019	1.65	1.66	1.38	1.39
6651	NASDAQ	CHK	Mon, Aug 5, 2019	1.59	1.62	1.51	1.56
6650	NASDAQ	CHK	Fri, Aug 2, 2019	1.69	1.69	1.63	1.64
6649	NASDAQ	CHK	Thu, Aug 1, 2019	1.78	1.79	1.62	1.65
6648	NASDAQ	CHK	Wed, Jul 31, 2019	1.82	1.87	1.77	1.81
6647	NASDAQ	CHK	Tue, Jul 30, 2019	1.63	1.80	1.59	1.80
6646	NASDAQ	CHK	Mon, Jul 29, 2019	1.65	1.68	1.59	1.64
6645	NASDAQ	CHK	Fri, Jul 26, 2019	1.69	1.71	1.62	1.65
6644	NASDAQ	CHK	Thu, Jul 25, 2019	1.76	1.78	1.68	1.68
6643	NASDAQ	CHK	Wed, Jul 24, 2019	1.67	1.76	1.67	1.73
6642	NASDAQ	CHK	Tue, Jul 23, 2019	1.65	1.68	1.62	1.68
6641	NASDAQ	CHK	Mon, Jul 22, 2019	1.64	1.70	1.60	1.64
6640	NASDAQ	CHK	Fri, Jul 19, 2019	1.61	1.64	1.57	1.62
6639	NASDAQ	CHK	Thu, Jul 18, 2019	1.71	1.71	1.57	1.58
6638	NASDAQ	CHK	Wed, Jul 17, 2019	1.79	1.80	1.70	1.70
6637	NASDAQ	CHK	Tue, Jul 16, 2019	1.83	1.84	1.76	1.77
6636	NASDAQ	CHK	Mon, Jul 15, 2019	1.93	1.93	1.83	1.83
6635	NASDAQ	CHK	Fri, Jul 12, 2019	1.91	1.96	1.89	1.93
6634	NASDAQ	CHK	Thu, Jul 11, 2019	1.91	1.93	1.88	1.90
6633	NASDAQ	CHK	Wed, Jul 10, 2019	1.83	1.92	1.82	1.91
6632	NASDAQ	CHK	Tue, Jul 9, 2019	1.80	1.82	1.76	1.81
6631	NASDAQ	CHK	Mon, Jul 8, 2019	1.84	1.85	1.80	1.81
6630	NASDAQ	CHK	Fri, Jul 5, 2019	1.85	1.87	1.80	1.85
6629	NASDAQ	CHK	Wed, Jul 3, 2019	1.91	1.92	1.83	1.84
6628	NASDAQ	CHK	Tue, Jul 2, 2019	1.95	1.95	1.85	1.85
6627	NASDAQ	CHK	Mon, Jul 1, 2019	2.05	2.08	1.93	1.96
6626	NASDAQ	CHK	Fri, Jun 28, 2019	1.93	1.97	1.90	1.95
6625	NASDAQ	CHK	Thu, Jun 27, 2019	1.89	1.91	1.86	1.88
6624	NASDAQ	CHK	Wed, Jun 26, 2019	1.88	1.95	1.84	1.91
6623	NASDAQ	CHK	Tue, Jun 25, 2019	1.89	1.91	1.80	1.83
6622	NASDAQ	CHK	Mon, Jun 24, 2019	1.97	1.99	1.87	1.91
6621	NASDAQ	CHK	Fri, Jun 21, 2019	2.01	2.03	1.89	1.95
6620	NASDAQ	CHK	Thu, Jun 20, 2019	1.92	2.00	1.89	1.98
6619	NASDAQ	CHK	Wed, Jun 19, 2019	1.90	1.91	1.82	1.83
6618	NASDAQ	CHK	Tue, Jun 18, 2019	1.83	1.94	1.82	1.90
6617	NASDAQ	CHK	Mon, Jun 17, 2019	1.75	1.85	1.73	1.83
6616	NASDAQ	CHK	Fri, Jun 14, 2019	1.82	1.82	1.75	1.77
6615	NASDAQ	CHK	Thu, Jun 13, 2019	1.83	1.86	1.75	1.83
6614	NASDAQ	CHK	Wed, Jun 12, 2019	1.88	1.89	1.75	1.76
6613	NASDAQ	CHK	Tue, Jun 11, 2019	1.92	1.96	1.89	1.90
6612	NASDAQ	CHK	Mon, Jun 10, 2019	1.92	1.99	1.88	1.89
6611	NASDAQ	CHK	Fri, Jun 7, 2019	1.89	1.97	1.86	1.89
6610	NASDAQ	CHK	Thu, Jun 6, 2019	1.90	1.92	1.83	1.91
6609	NASDAQ	CHK	Wed, Jun 5, 2019	2.02	2.03	1.85	1.88
6608	NASDAQ	CHK	Tue, Jun 4, 2019	1.99	2.08	1.99	2.01
6607	NASDAQ	CHK	Mon, Jun 3, 2019	1.94	1.99	1.92	1.96
6606	NASDAQ	CHK	Fri, May 31, 2019	1.95	1.98	1.90	1.92
6605	NASDAQ	CHK	Thu, May 30, 2019	2.12	2.14	1.99	2.04
6604	NASDAQ	CHK	Wed, May 29, 2019	1.90	2.16	1.90	2.14
6603	NASDAQ	CHK	Tue, May 28, 2019	2.01	2.03	1.91	1.94
6602	NASDAQ	CHK	Fri, May 24, 2019	2.13	2.13	2.00	2.01
6601	NASDAQ	CHK	Thu, May 23, 2019	2.08	2.09	1.97	2.06
6600	NASDAQ	CHK	Wed, May 22, 2019	2.33	2.34	2.19	2.19
6599	NASDAQ	CHK	Tue, May 21, 2019	2.32	2.40	2.29	2.38
6598	NASDAQ	CHK	Mon, May 20, 2019	2.40	2.41	2.27	2.30
6597	NASDAQ	CHK	Fri, May 17, 2019	2.47	2.50	2.39	2.41
6596	NASDAQ	CHK	Thu, May 16, 2019	2.55	2.60	2.50	2.53
6595	NASDAQ	CHK	Wed, May 15, 2019	2.48	2.51	2.43	2.50
6594	NASDAQ	CHK	Tue, May 14, 2019	2.45	2.56	2.42	2.56
6593	NASDAQ	CHK	Mon, May 13, 2019	2.53	2.55	2.32	2.40
6592	NASDAQ	CHK	Fri, May 10, 2019	2.67	2.68	2.53	2.61
6591	NASDAQ	CHK	Thu, May 9, 2019	2.82	2.83	2.61	2.68
6590	NASDAQ	CHK	Wed, May 8, 2019	2.68	2.94	2.68	2.89
6589	NASDAQ	CHK	Tue, May 7, 2019	2.84	2.86	2.73	2.78
6588	NASDAQ	CHK	Mon, May 6, 2019	2.73	2.90	2.73	2.89
6587	NASDAQ	CHK	Fri, May 3, 2019	2.76	2.87	2.74	2.82
6586	NASDAQ	CHK	Thu, May 2, 2019	2.78	2.87	2.70	2.73
6585	NASDAQ	CHK	Wed, May 1, 2019	2.90	2.91	2.80	2.83
6584	NASDAQ	CHK	Tue, Apr 30, 2019	2.99	2.99	2.86	2.91
6583	NASDAQ	CHK	Mon, Apr 29, 2019	2.98	3.01	2.93	2.95
6582	NASDAQ	CHK	Fri, Apr 26, 2019	2.90	3.01	2.87	2.97
6581	NASDAQ	CHK	Thu, Apr 25, 2019	3.07	3.08	2.94	2.94
6580	NASDAQ	CHK	Wed, Apr 24, 2019	3.17	3.18	3.05	3.07
6579	NASDAQ	CHK	Tue, Apr 23, 2019	3.12	3.20	3.09	3.17
6578	NASDAQ	CHK	Mon, Apr 22, 2019	3.02	3.12	2.98	3.10
6577	NASDAQ	CHK	Thu, Apr 18, 2019	3.08	3.08	2.90	2.91
6576	NASDAQ	CHK	Wed, Apr 17, 2019	3.13	3.15	3.06	3.06
6575	NASDAQ	CHK	Tue, Apr 16, 2019	3.09	3.12	3.05	3.09
6574	NASDAQ	CHK	Mon, Apr 15, 2019	3.14	3.15	3.06	3.07
6573	NASDAQ	CHK	Fri, Apr 12, 2019	3.38	3.40	3.15	3.17
6572	NASDAQ	CHK	Thu, Apr 11, 2019	3.36	3.43	3.27	3.33
6571	NASDAQ	CHK	Wed, Apr 10, 2019	3.36	3.44	3.33	3.40
6570	NASDAQ	CHK	Tue, Apr 9, 2019	3.43	3.43	3.31	3.34
6569	NASDAQ	CHK	Mon, Apr 8, 2019	3.46	3.57	3.38	3.44
6568	NASDAQ	CHK	Fri, Apr 5, 2019	3.21	3.46	3.20	3.41
6567	NASDAQ	CHK	Thu, Apr 4, 2019	3.14	3.21	3.12	3.21
6566	NASDAQ	CHK	Wed, Apr 3, 2019	3.21	3.23	3.10	3.14
6565	NASDAQ	CHK	Tue, Apr 2, 2019	3.16	3.23	3.15	3.20
6564	NASDAQ	CHK	Mon, Apr 1, 2019	3.15	3.21	3.12	3.15
6563	NASDAQ	CHK	Fri, Mar 29, 2019	3.19	3.21	3.09	3.10
6562	NASDAQ	CHK	Thu, Mar 28, 2019	3.12	3.19	3.09	3.14
6561	NASDAQ	CHK	Wed, Mar 27, 2019	3.19	3.24	3.07	3.19
6560	NASDAQ	CHK	Tue, Mar 26, 2019	3.20	3.26	3.16	3.19
6559	NASDAQ	CHK	Mon, Mar 25, 2019	3.10	3.14	2.99	3.10
6558	NASDAQ	CHK	Fri, Mar 22, 2019	3.19	3.21	3.03	3.12
6557	NASDAQ	CHK	Thu, Mar 21, 2019	3.25	3.32	3.20	3.25
6556	NASDAQ	CHK	Wed, Mar 20, 2019	3.12	3.35	3.10	3.26
6555	NASDAQ	CHK	Tue, Mar 19, 2019	3.23	3.38	3.13	3.16
6554	NASDAQ	CHK	Mon, Mar 18, 2019	3.02	3.17	3.01	3.15
6553	NASDAQ	CHK	Fri, Mar 15, 2019	3.07	3.10	2.96	2.97
6552	NASDAQ	CHK	Thu, Mar 14, 2019	3.02	3.12	3.02	3.10
6551	NASDAQ	CHK	Wed, Mar 13, 2019	2.94	3.03	2.92	3.02
6550	NASDAQ	CHK	Tue, Mar 12, 2019	2.78	2.93	2.77	2.88
6549	NASDAQ	CHK	Mon, Mar 11, 2019	2.75	2.79	2.67	2.75
6548	NASDAQ	CHK	Fri, Mar 8, 2019	2.88	2.88	2.71	2.73
6547	NASDAQ	CHK	Thu, Mar 7, 2019	3.00	3.04	2.91	2.97
6546	NASDAQ	CHK	Wed, Mar 6, 2019	3.08	3.10	2.97	2.98
6545	NASDAQ	CHK	Tue, Mar 5, 2019	3.21	3.22	3.09	3.14
6544	NASDAQ	CHK	Mon, Mar 4, 2019	3.22	3.32	3.05	3.19
6543	NASDAQ	CHK	Fri, Mar 1, 2019	3.01	3.22	3.00	3.13
6542	NASDAQ	CHK	Thu, Feb 28, 2019	2.95	2.97	2.83	2.96
6541	NASDAQ	CHK	Wed, Feb 27, 2019	2.87	2.99	2.73	2.90
6540	NASDAQ	CHK	Tue, Feb 26, 2019	2.64	2.67	2.56	2.63
6539	NASDAQ	CHK	Mon, Feb 25, 2019	2.58	2.64	2.55	2.64
6538	NASDAQ	CHK	Fri, Feb 22, 2019	2.63	2.69	2.57	2.60
6537	NASDAQ	CHK	Thu, Feb 21, 2019	2.73	2.75	2.58	2.60
6536	NASDAQ	CHK	Wed, Feb 20, 2019	2.66	2.75	2.65	2.75
6535	NASDAQ	CHK	Tue, Feb 19, 2019	2.64	2.69	2.62	2.68
6534	NASDAQ	CHK	Fri, Feb 15, 2019	2.55	2.62	2.54	2.62
6533	NASDAQ	CHK	Thu, Feb 14, 2019	2.49	2.56	2.44	2.51
6532	NASDAQ	CHK	Wed, Feb 13, 2019	2.44	2.52	2.42	2.49
6531	NASDAQ	CHK	Tue, Feb 12, 2019	2.49	2.52	2.41	2.41
6530	NASDAQ	CHK	Mon, Feb 11, 2019	2.41	2.47	2.35	2.40
6529	NASDAQ	CHK	Fri, Feb 8, 2019	2.48	2.52	2.29	2.39
6528	NASDAQ	CHK	Thu, Feb 7, 2019	2.55	2.57	2.40	2.47
6527	NASDAQ	CHK	Wed, Feb 6, 2019	2.70	2.73	2.58	2.60
6526	NASDAQ	CHK	Tue, Feb 5, 2019	2.78	2.81	2.70	2.70
6525	NASDAQ	CHK	Mon, Feb 4, 2019	2.79	2.82	2.74	2.79
6524	NASDAQ	CHK	Fri, Feb 1, 2019	2.85	2.87	2.74	2.84
6523	NASDAQ	CHK	Thu, Jan 31, 2019	2.92	2.96	2.77	2.85
6522	NASDAQ	CHK	Wed, Jan 30, 2019	2.85	2.95	2.81	2.90
6521	NASDAQ	CHK	Tue, Jan 29, 2019	2.83	2.88	2.79	2.80
6520	NASDAQ	CHK	Mon, Jan 28, 2019	2.72	2.83	2.63	2.82
6519	NASDAQ	CHK	Fri, Jan 25, 2019	2.78	2.90	2.72	2.78
6518	NASDAQ	CHK	Thu, Jan 24, 2019	2.68	2.76	2.62	2.75
6517	NASDAQ	CHK	Wed, Jan 23, 2019	2.79	2.83	2.65	2.69
6516	NASDAQ	CHK	Tue, Jan 22, 2019	2.90	2.90	2.71	2.74
6515	NASDAQ	CHK	Fri, Jan 18, 2019	2.96	3.00	2.87	2.97
6514	NASDAQ	CHK	Thu, Jan 17, 2019	2.83	2.91	2.73	2.89
6513	NASDAQ	CHK	Wed, Jan 16, 2019	2.86	2.96	2.82	2.85
6512	NASDAQ	CHK	Tue, Jan 15, 2019	2.77	2.87	2.76	2.85
6511	NASDAQ	CHK	Mon, Jan 14, 2019	2.68	2.81	2.67	2.73
6510	NASDAQ	CHK	Fri, Jan 11, 2019	2.69	2.77	2.66	2.72
6509	NASDAQ	CHK	Thu, Jan 10, 2019	2.70	2.79	2.56	2.73
6508	NASDAQ	CHK	Wed, Jan 9, 2019	2.62	2.87	2.57	2.76
6507	NASDAQ	CHK	Tue, Jan 8, 2019	2.45	2.54	2.37	2.45
6506	NASDAQ	CHK	Mon, Jan 7, 2019	2.31	2.44	2.25	2.37
6505	NASDAQ	CHK	Fri, Jan 4, 2019	2.21	2.34	2.19	2.25
6504	NASDAQ	CHK	Thu, Jan 3, 2019	2.17	2.19	2.06	2.13
6503	NASDAQ	CHK	Wed, Jan 2, 2019	2.00	2.24	2.00	2.19
6502	NASDAQ	CHK	Mon, Dec 31, 2018	2.20	2.22	2.03	2.10
6501	NASDAQ	CHK	Fri, Dec 28, 2018	2.22	2.29	2.09	2.15
6500	NASDAQ	CHK	Thu, Dec 27, 2018	2.12	2.21	2.06	2.21
6499	NASDAQ	CHK	Wed, Dec 26, 2018	1.95	2.19	1.85	2.19
6498	NASDAQ	CHK	Mon, Dec 24, 2018	1.90	1.92	1.71	1.73
6497	NASDAQ	CHK	Fri, Dec 21, 2018	1.85	2.03	1.84	1.90
6496	NASDAQ	CHK	Thu, Dec 20, 2018	2.02	2.04	1.81	1.84
6495	NASDAQ	CHK	Wed, Dec 19, 2018	2.12	2.21	2.00	2.02
6494	NASDAQ	CHK	Tue, Dec 18, 2018	2.28	2.29	2.10	2.12
6493	NASDAQ	CHK	Mon, Dec 17, 2018	2.31	2.43	2.23	2.25
6492	NASDAQ	CHK	Fri, Dec 14, 2018	2.52	2.55	2.33	2.33
6491	NASDAQ	CHK	Thu, Dec 13, 2018	2.58	2.60	2.51	2.58
6490	NASDAQ	CHK	Wed, Dec 12, 2018	2.65	2.69	2.56	2.57
6489	NASDAQ	CHK	Tue, Dec 11, 2018	2.71	2.73	2.57	2.57
6488	NASDAQ	CHK	Mon, Dec 10, 2018	2.69	2.76	2.57	2.65
6487	NASDAQ	CHK	Fri, Dec 7, 2018	2.81	2.86	2.71	2.72
6486	NASDAQ	CHK	Thu, Dec 6, 2018	2.82	2.82	2.61	2.72
6485	NASDAQ	CHK	Tue, Dec 4, 2018	3.10	3.12	2.89	2.89
6484	NASDAQ	CHK	Mon, Dec 3, 2018	3.05	3.10	2.95	3.09
6483	NASDAQ	CHK	Fri, Nov 30, 2018	3.00	3.01	2.90	2.92
6482	NASDAQ	CHK	Thu, Nov 29, 2018	3.03	3.09	2.97	3.03
6481	NASDAQ	CHK	Wed, Nov 28, 2018	3.00	3.05	2.86	3.01
6480	NASDAQ	CHK	Tue, Nov 27, 2018	3.15	3.15	2.95	2.99
6479	NASDAQ	CHK	Mon, Nov 26, 2018	3.23	3.28	3.12	3.15
6478	NASDAQ	CHK	Fri, Nov 23, 2018	3.16	3.21	3.09	3.15
6477	NASDAQ	CHK	Wed, Nov 21, 2018	3.30	3.35	3.23	3.26
6476	NASDAQ	CHK	Tue, Nov 20, 2018	3.39	3.40	3.14	3.20
6475	NASDAQ	CHK	Mon, Nov 19, 2018	3.55	3.57	3.42	3.48
6474	NASDAQ	CHK	Fri, Nov 16, 2018	3.73	3.76	3.54	3.58
6473	NASDAQ	CHK	Thu, Nov 15, 2018	3.61	3.76	3.60	3.73
6472	NASDAQ	CHK	Wed, Nov 14, 2018	3.74	3.78	3.63	3.67
6471	NASDAQ	CHK	Tue, Nov 13, 2018	3.53	3.66	3.46	3.56
6470	NASDAQ	CHK	Mon, Nov 12, 2018	3.72	3.73	3.46	3.46
6469	NASDAQ	CHK	Fri, Nov 9, 2018	3.50	3.69	3.46	3.63
6468	NASDAQ	CHK	Thu, Nov 8, 2018	3.70	3.71	3.53	3.54
6467	NASDAQ	CHK	Wed, Nov 7, 2018	3.69	3.79	3.59	3.72
6466	NASDAQ	CHK	Tue, Nov 6, 2018	3.79	3.87	3.60	3.65
6465	NASDAQ	CHK	Mon, Nov 5, 2018	3.66	3.83	3.63	3.79
6464	NASDAQ	CHK	Fri, Nov 2, 2018	3.60	3.68	3.43	3.49
6463	NASDAQ	CHK	Thu, Nov 1, 2018	3.60	3.67	3.43	3.57
6462	NASDAQ	CHK	Wed, Oct 31, 2018	3.44	3.63	3.36	3.51
6461	NASDAQ	CHK	Tue, Oct 30, 2018	3.34	3.53	3.16	3.27
6460	NASDAQ	CHK	Mon, Oct 29, 2018	3.93	3.94	3.62	3.72
6459	NASDAQ	CHK	Fri, Oct 26, 2018	3.89	3.97	3.70	3.82
6458	NASDAQ	CHK	Thu, Oct 25, 2018	4.05	4.08	3.90	4.00
6457	NASDAQ	CHK	Wed, Oct 24, 2018	4.50	4.52	3.91	3.92
6456	NASDAQ	CHK	Tue, Oct 23, 2018	4.40	4.56	4.31	4.46
6455	NASDAQ	CHK	Mon, Oct 22, 2018	4.72	4.76	4.44	4.54
6454	NASDAQ	CHK	Fri, Oct 19, 2018	4.68	4.86	4.66	4.69
6453	NASDAQ	CHK	Thu, Oct 18, 2018	4.63	4.75	4.55	4.66
6452	NASDAQ	CHK	Wed, Oct 17, 2018	4.76	4.81	4.55	4.70
6451	NASDAQ	CHK	Tue, Oct 16, 2018	4.62	4.83	4.59	4.82
6450	NASDAQ	CHK	Mon, Oct 15, 2018	4.49	4.64	4.45	4.60
6449	NASDAQ	CHK	Fri, Oct 12, 2018	4.53	4.53	4.35	4.45
6448	NASDAQ	CHK	Thu, Oct 11, 2018	4.54	4.55	4.27	4.37
6447	NASDAQ	CHK	Wed, Oct 10, 2018	4.88	4.90	4.61	4.61
6446	NASDAQ	CHK	Tue, Oct 9, 2018	4.70	4.98	4.66	4.87
6445	NASDAQ	CHK	Mon, Oct 8, 2018	4.44	4.69	4.42	4.67
6444	NASDAQ	CHK	Fri, Oct 5, 2018	4.56	4.60	4.43	4.48
6443	NASDAQ	CHK	Thu, Oct 4, 2018	4.68	4.73	4.53	4.59
6442	NASDAQ	CHK	Wed, Oct 3, 2018	4.54	4.74	4.45	4.73
6441	NASDAQ	CHK	Tue, Oct 2, 2018	4.59	4.60	4.44	4.52
6440	NASDAQ	CHK	Mon, Oct 1, 2018	4.53	4.62	4.48	4.58
6439	NASDAQ	CHK	Fri, Sep 28, 2018	4.43	4.54	4.42	4.49
6438	NASDAQ	CHK	Thu, Sep 27, 2018	4.48	4.55	4.43	4.46
6437	NASDAQ	CHK	Wed, Sep 26, 2018	4.55	4.60	4.40	4.40
6436	NASDAQ	CHK	Tue, Sep 25, 2018	4.70	4.75	4.61	4.62
6435	NASDAQ	CHK	Mon, Sep 24, 2018	4.58	4.69	4.55	4.67
6434	NASDAQ	CHK	Fri, Sep 21, 2018	4.42	4.51	4.40	4.44
6433	NASDAQ	CHK	Thu, Sep 20, 2018	4.35	4.49	4.33	4.41
6432	NASDAQ	CHK	Wed, Sep 19, 2018	4.12	4.34	4.12	4.30
6431	NASDAQ	CHK	Tue, Sep 18, 2018	4.05	4.16	4.00	4.13
6430	NASDAQ	CHK	Mon, Sep 17, 2018	4.00	4.06	3.98	3.98
6429	NASDAQ	CHK	Fri, Sep 14, 2018	4.01	4.06	3.95	4.00
6428	NASDAQ	CHK	Thu, Sep 13, 2018	4.02	4.09	3.99	4.01
6427	NASDAQ	CHK	Wed, Sep 12, 2018	4.12	4.14	4.01	4.06
6426	NASDAQ	CHK	Tue, Sep 11, 2018	4.07	4.11	4.00	4.06
6425	NASDAQ	CHK	Mon, Sep 10, 2018	4.05	4.15	4.04	4.08
6424	NASDAQ	CHK	Fri, Sep 7, 2018	4.01	4.11	3.88	4.03
6423	NASDAQ	CHK	Thu, Sep 6, 2018	4.30	4.31	4.05	4.06
6422	NASDAQ	CHK	Wed, Sep 5, 2018	4.27	4.36	4.22	4.31
6421	NASDAQ	CHK	Tue, Sep 4, 2018	4.46	4.49	4.29	4.31
6420	NASDAQ	CHK	Fri, Aug 31, 2018	4.48	4.49	4.35	4.43
6419	NASDAQ	CHK	Thu, Aug 30, 2018	4.50	4.55	4.44	4.51
6418	NASDAQ	CHK	Wed, Aug 29, 2018	4.44	4.56	4.38	4.50
6417	NASDAQ	CHK	Tue, Aug 28, 2018	4.57	4.59	4.40	4.43
6416	NASDAQ	CHK	Mon, Aug 27, 2018	4.58	4.64	4.52	4.56
6415	NASDAQ	CHK	Fri, Aug 24, 2018	4.75	4.78	4.56	4.57
6414	NASDAQ	CHK	Thu, Aug 23, 2018	4.66	4.68	4.60	4.68
6413	NASDAQ	CHK	Wed, Aug 22, 2018	4.61	4.74	4.58	4.71
6412	NASDAQ	CHK	Tue, Aug 21, 2018	4.48	4.60	4.48	4.56
6411	NASDAQ	CHK	Mon, Aug 20, 2018	4.30	4.42	4.28	4.42
6410	NASDAQ	CHK	Fri, Aug 17, 2018	4.26	4.36	4.26	4.31
6409	NASDAQ	CHK	Thu, Aug 16, 2018	4.41	4.43	4.23	4.25
6408	NASDAQ	CHK	Wed, Aug 15, 2018	4.43	4.47	4.16	4.40
6407	NASDAQ	CHK	Tue, Aug 14, 2018	4.53	4.60	4.48	4.51
6406	NASDAQ	CHK	Mon, Aug 13, 2018	4.65	4.71	4.43	4.44
6405	NASDAQ	CHK	Fri, Aug 10, 2018	4.59	4.67	4.55	4.66
6404	NASDAQ	CHK	Thu, Aug 9, 2018	4.69	4.72	4.60	4.63
6403	NASDAQ	CHK	Wed, Aug 8, 2018	4.68	4.70	4.58	4.66
6402	NASDAQ	CHK	Tue, Aug 7, 2018	4.77	4.88	4.68	4.70
6401	NASDAQ	CHK	Mon, Aug 6, 2018	4.46	4.79	4.44	4.70
6400	NASDAQ	CHK	Fri, Aug 3, 2018	4.43	4.54	4.36	4.46
6399	NASDAQ	CHK	Thu, Aug 2, 2018	4.39	4.49	4.35	4.41
6398	NASDAQ	CHK	Wed, Aug 1, 2018	4.47	4.49	4.24	4.45
6397	NASDAQ	CHK	Tue, Jul 31, 2018	4.67	4.75	4.51	4.72
6396	NASDAQ	CHK	Mon, Jul 30, 2018	4.48	4.67	4.42	4.67
6395	NASDAQ	CHK	Fri, Jul 27, 2018	4.91	4.98	4.37	4.41
6394	NASDAQ	CHK	Thu, Jul 26, 2018	4.44	4.54	4.39	4.40
6393	NASDAQ	CHK	Wed, Jul 25, 2018	4.52	4.57	4.38	4.41
6392	NASDAQ	CHK	Tue, Jul 24, 2018	4.55	4.70	4.49	4.52
6391	NASDAQ	CHK	Mon, Jul 23, 2018	4.63	4.63	4.47	4.51
6390	NASDAQ	CHK	Fri, Jul 20, 2018	4.66	4.68	4.46	4.55
6389	NASDAQ	CHK	Thu, Jul 19, 2018	4.63	4.74	4.57	4.67
6388	NASDAQ	CHK	Wed, Jul 18, 2018	4.69	4.71	4.48	4.66
6387	NASDAQ	CHK	Tue, Jul 17, 2018	4.83	4.87	4.68	4.77
6386	NASDAQ	CHK	Mon, Jul 16, 2018	5.08	5.12	4.81	4.90
6385	NASDAQ	CHK	Fri, Jul 13, 2018	5.13	5.26	5.12	5.19
6384	NASDAQ	CHK	Thu, Jul 12, 2018	5.22	5.26	5.09	5.12
6383	NASDAQ	CHK	Wed, Jul 11, 2018	5.32	5.40	5.08	5.15
6382	NASDAQ	CHK	Tue, Jul 10, 2018	5.47	5.60	5.32	5.40
6381	NASDAQ	CHK	Mon, Jul 9, 2018	5.32	5.46	5.32	5.39
6380	NASDAQ	CHK	Fri, Jul 6, 2018	5.22	5.33	5.19	5.29
6379	NASDAQ	CHK	Thu, Jul 5, 2018	5.30	5.38	5.23	5.27
6378	NASDAQ	CHK	Tue, Jul 3, 2018	5.30	5.42	5.24	5.28
6377	NASDAQ	CHK	Mon, Jul 2, 2018	5.14	5.23	5.11	5.18
6376	NASDAQ	CHK	Fri, Jun 29, 2018	5.17	5.35	5.17	5.24
6375	NASDAQ	CHK	Thu, Jun 28, 2018	5.17	5.24	5.05	5.18
6374	NASDAQ	CHK	Wed, Jun 27, 2018	5.10	5.44	5.07	5.16
6373	NASDAQ	CHK	Tue, Jun 26, 2018	4.91	5.05	4.77	5.03
6372	NASDAQ	CHK	Mon, Jun 25, 2018	5.06	5.12	4.83	4.89
6371	NASDAQ	CHK	Fri, Jun 22, 2018	5.05	5.13	4.96	5.05
6370	NASDAQ	CHK	Thu, Jun 21, 2018	4.83	5.02	4.82	4.87
6369	NASDAQ	CHK	Wed, Jun 20, 2018	4.84	4.89	4.76	4.88
6368	NASDAQ	CHK	Tue, Jun 19, 2018	4.64	4.80	4.58	4.79
6367	NASDAQ	CHK	Mon, Jun 18, 2018	4.61	4.79	4.60	4.74
6366	NASDAQ	CHK	Fri, Jun 15, 2018	4.70	4.70	4.55	4.64
6365	NASDAQ	CHK	Thu, Jun 14, 2018	4.83	4.84	4.70	4.73
6364	NASDAQ	CHK	Wed, Jun 13, 2018	4.75	4.83	4.67	4.76
6363	NASDAQ	CHK	Tue, Jun 12, 2018	4.99	5.05	4.78	4.81
6362	NASDAQ	CHK	Mon, Jun 11, 2018	4.81	5.00	4.80	4.92
6361	NASDAQ	CHK	Fri, Jun 8, 2018	4.68	4.88	4.58	4.81
6360	NASDAQ	CHK	Thu, Jun 7, 2018	4.49	4.82	4.45	4.70
6359	NASDAQ	CHK	Wed, Jun 6, 2018	4.33	4.39	4.21	4.37
6358	NASDAQ	CHK	Tue, Jun 5, 2018	4.28	4.39	4.20	4.32
6357	NASDAQ	CHK	Mon, Jun 4, 2018	4.56	4.65	4.28	4.32
6356	NASDAQ	CHK	Fri, Jun 1, 2018	4.45	4.60	4.41	4.53
6355	NASDAQ	CHK	Thu, May 31, 2018	4.49	4.57	4.39	4.47
6354	NASDAQ	CHK	Wed, May 30, 2018	4.35	4.56	4.32	4.51
6353	NASDAQ	CHK	Tue, May 29, 2018	4.17	4.37	4.16	4.28
6352	NASDAQ	CHK	Fri, May 25, 2018	4.38	4.42	4.09	4.30
6351	NASDAQ	CHK	Thu, May 24, 2018	4.52	4.65	4.49	4.55
6350	NASDAQ	CHK	Wed, May 23, 2018	4.48	4.72	4.37	4.64
6349	NASDAQ	CHK	Tue, May 22, 2018	4.80	5.00	4.46	4.54
6348	NASDAQ	CHK	Mon, May 21, 2018	4.22	4.68	4.15	4.61
6347	NASDAQ	CHK	Fri, May 18, 2018	4.42	4.52	3.97	4.06
6346	NASDAQ	CHK	Thu, May 17, 2018	4.01	4.29	3.97	4.29
6345	NASDAQ	CHK	Wed, May 16, 2018	3.70	3.95	3.67	3.93
6344	NASDAQ	CHK	Tue, May 15, 2018	3.62	3.74	3.61	3.71
6343	NASDAQ	CHK	Mon, May 14, 2018	3.40	3.63	3.37	3.60
6342	NASDAQ	CHK	Fri, May 11, 2018	3.35	3.42	3.31	3.36
6341	NASDAQ	CHK	Thu, May 10, 2018	3.33	3.38	3.27	3.35
6340	NASDAQ	CHK	Wed, May 9, 2018	3.17	3.33	3.16	3.26
6339	NASDAQ	CHK	Tue, May 8, 2018	3.12	3.13	3.00	3.13
6338	NASDAQ	CHK	Mon, May 7, 2018	3.09	3.18	3.06	3.13
6337	NASDAQ	CHK	Fri, May 4, 2018	2.92	3.05	2.89	3.05
6336	NASDAQ	CHK	Thu, May 3, 2018	2.91	2.95	2.86	2.92
6335	NASDAQ	CHK	Wed, May 2, 2018	3.07	3.07	2.90	2.93
6334	NASDAQ	CHK	Tue, May 1, 2018	2.96	3.00	2.90	2.98
6333	NASDAQ	CHK	Mon, Apr 30, 2018	2.97	2.97	2.91	2.97
6332	NASDAQ	CHK	Fri, Apr 27, 2018	3.00	3.04	2.94	2.95
6331	NASDAQ	CHK	Thu, Apr 26, 2018	3.02	3.04	2.96	3.02
6330	NASDAQ	CHK	Wed, Apr 25, 2018	2.94	3.02	2.92	2.98
6329	NASDAQ	CHK	Tue, Apr 24, 2018	3.00	3.06	2.91	2.94
6328	NASDAQ	CHK	Mon, Apr 23, 2018	3.00	3.03	2.92	2.98
6327	NASDAQ	CHK	Fri, Apr 20, 2018	3.00	3.03	2.96	3.00
6326	NASDAQ	CHK	Thu, Apr 19, 2018	3.15	3.18	3.01	3.03
6325	NASDAQ	CHK	Wed, Apr 18, 2018	3.09	3.17	3.02	3.13
6324	NASDAQ	CHK	Tue, Apr 17, 2018	3.06	3.09	3.01	3.04
6323	NASDAQ	CHK	Mon, Apr 16, 2018	3.12	3.25	3.06	3.11
6322	NASDAQ	CHK	Fri, Apr 13, 2018	3.17	3.21	3.13	3.14
6321	NASDAQ	CHK	Thu, Apr 12, 2018	3.15	3.20	3.11	3.15
6320	NASDAQ	CHK	Wed, Apr 11, 2018	3.09	3.21	3.06	3.19
6319	NASDAQ	CHK	Tue, Apr 10, 2018	3.00	3.12	2.96	3.09
6318	NASDAQ	CHK	Mon, Apr 9, 2018	2.99	3.03	2.92	2.96
6317	NASDAQ	CHK	Fri, Apr 6, 2018	3.02	3.08	2.93	2.98
6316	NASDAQ	CHK	Thu, Apr 5, 2018	2.94	3.10	2.92	3.08
6315	NASDAQ	CHK	Wed, Apr 4, 2018	2.86	2.93	2.82	2.91
6314	NASDAQ	CHK	Tue, Apr 3, 2018	2.97	2.98	2.85	2.92
6313	NASDAQ	CHK	Mon, Apr 2, 2018	2.98	3.00	2.81	2.97
6312	NASDAQ	CHK	Thu, Mar 29, 2018	3.00	3.04	2.96	3.02
6311	NASDAQ	CHK	Wed, Mar 28, 2018	2.92	3.00	2.82	2.99
6310	NASDAQ	CHK	Tue, Mar 27, 2018	3.09	3.10	2.92	2.95
6309	NASDAQ	CHK	Mon, Mar 26, 2018	3.12	3.13	3.01	3.12
6308	NASDAQ	CHK	Fri, Mar 23, 2018	3.15	3.21	3.05	3.07
6307	NASDAQ	CHK	Thu, Mar 22, 2018	3.15	3.20	3.08	3.11
6306	NASDAQ	CHK	Wed, Mar 21, 2018	3.12	3.24	3.11	3.23
6305	NASDAQ	CHK	Tue, Mar 20, 2018	3.01	3.13	3.01	3.11
6304	NASDAQ	CHK	Mon, Mar 19, 2018	3.05	3.09	2.99	3.01
6303	NASDAQ	CHK	Fri, Mar 16, 2018	3.03	3.13	2.98	3.06
6302	NASDAQ	CHK	Thu, Mar 15, 2018	3.06	3.12	2.98	3.02
6301	NASDAQ	CHK	Wed, Mar 14, 2018	3.15	3.17	3.02	3.03
6300	NASDAQ	CHK	Tue, Mar 13, 2018	3.12	3.17	3.09	3.12
6299	NASDAQ	CHK	Mon, Mar 12, 2018	3.11	3.17	3.05	3.11
6298	NASDAQ	CHK	Fri, Mar 9, 2018	3.05	3.11	3.01	3.10
6297	NASDAQ	CHK	Thu, Mar 8, 2018	3.06	3.08	2.97	2.97
6296	NASDAQ	CHK	Wed, Mar 7, 2018	3.05	3.14	3.01	3.04
6295	NASDAQ	CHK	Tue, Mar 6, 2018	3.16	3.18	3.03	3.11
6294	NASDAQ	CHK	Mon, Mar 5, 2018	2.95	3.18	2.93	3.12
6293	NASDAQ	CHK	Fri, Mar 2, 2018	2.80	2.98	2.77	2.96
6292	NASDAQ	CHK	Thu, Mar 1, 2018	2.83	2.90	2.77	2.80
6291	NASDAQ	CHK	Wed, Feb 28, 2018	3.06	3.09	2.80	2.82
6290	NASDAQ	CHK	Tue, Feb 27, 2018	3.18	3.23	3.06	3.06
6289	NASDAQ	CHK	Mon, Feb 26, 2018	3.20	3.28	3.06	3.21
6288	NASDAQ	CHK	Fri, Feb 23, 2018	3.38	3.43	3.04	3.20
6287	NASDAQ	CHK	Thu, Feb 22, 2018	2.87	3.33	2.86	3.20
6286	NASDAQ	CHK	Wed, Feb 21, 2018	2.78	2.79	2.63	2.63
6285	NASDAQ	CHK	Tue, Feb 20, 2018	2.77	2.79	2.73	2.77
6284	NASDAQ	CHK	Fri, Feb 16, 2018	2.85	2.86	2.70	2.73
6283	NASDAQ	CHK	Thu, Feb 15, 2018	2.82	2.88	2.72	2.86
6282	NASDAQ	CHK	Wed, Feb 14, 2018	2.70	2.87	2.66	2.80
6281	NASDAQ	CHK	Tue, Feb 13, 2018	2.85	2.87	2.72	2.74
6280	NASDAQ	CHK	Mon, Feb 12, 2018	2.92	2.97	2.84	2.85
6279	NASDAQ	CHK	Fri, Feb 9, 2018	2.85	2.87	2.53	2.85
6278	NASDAQ	CHK	Thu, Feb 8, 2018	2.92	2.96	2.80	2.82
6277	NASDAQ	CHK	Wed, Feb 7, 2018	3.12	3.16	2.80	2.89
6276	NASDAQ	CHK	Tue, Feb 6, 2018	3.01	3.19	2.98	3.13
6275	NASDAQ	CHK	Mon, Feb 5, 2018	3.30	3.37	3.00	3.09
6274	NASDAQ	CHK	Fri, Feb 2, 2018	3.43	3.44	3.30	3.33
6273	NASDAQ	CHK	Thu, Feb 1, 2018	3.49	3.50	3.30	3.46
6272	NASDAQ	CHK	Wed, Jan 31, 2018	3.68	3.69	3.50	3.50
6271	NASDAQ	CHK	Tue, Jan 30, 2018	3.85	3.85	3.62	3.63
6270	NASDAQ	CHK	Mon, Jan 29, 2018	3.95	3.99	3.86	3.88
6269	NASDAQ	CHK	Fri, Jan 26, 2018	4.00	4.01	3.94	4.00
6268	NASDAQ	CHK	Thu, Jan 25, 2018	4.14	4.18	3.92	3.96
6267	NASDAQ	CHK	Wed, Jan 24, 2018	4.09	4.18	4.07	4.08
6266	NASDAQ	CHK	Tue, Jan 23, 2018	4.05	4.11	3.97	4.07
6265	NASDAQ	CHK	Mon, Jan 22, 2018	3.97	3.99	3.90	3.97
6264	NASDAQ	CHK	Fri, Jan 19, 2018	4.00	4.00	3.91	3.95
6263	NASDAQ	CHK	Thu, Jan 18, 2018	4.07	4.08	3.97	3.99
6262	NASDAQ	CHK	Wed, Jan 17, 2018	4.17	4.18	4.02	4.09
6261	NASDAQ	CHK	Tue, Jan 16, 2018	4.30	4.30	4.12	4.14
6260	NASDAQ	CHK	Fri, Jan 12, 2018	4.22	4.34	4.18	4.28
6259	NASDAQ	CHK	Thu, Jan 11, 2018	4.04	4.26	4.01	4.19
6258	NASDAQ	CHK	Wed, Jan 10, 2018	4.08	4.10	4.00	4.00
6257	NASDAQ	CHK	Tue, Jan 9, 2018	4.00	4.10	3.98	4.05
6256	NASDAQ	CHK	Mon, Jan 8, 2018	4.00	4.00	3.88	3.97
6255	NASDAQ	CHK	Fri, Jan 5, 2018	4.02	4.02	3.93	3.99
6254	NASDAQ	CHK	Thu, Jan 4, 2018	4.12	4.12	4.00	4.05
6253	NASDAQ	CHK	Wed, Jan 3, 2018	4.14	4.16	4.03	4.07
6252	NASDAQ	CHK	Tue, Jan 2, 2018	4.05	4.17	4.00	4.10
6251	NASDAQ	CHK	Fri, Dec 29, 2017	4.08	4.13	3.96	3.96
6250	NASDAQ	CHK	Thu, Dec 28, 2017	3.96	4.09	3.91	4.04
6249	NASDAQ	CHK	Wed, Dec 27, 2017	4.01	4.05	3.88	3.88
6248	NASDAQ	CHK	Tue, Dec 26, 2017	3.89	4.00	3.88	4.00
6247	NASDAQ	CHK	Fri, Dec 22, 2017	3.84	3.95	3.82	3.85
6246	NASDAQ	CHK	Thu, Dec 21, 2017	3.71	3.88	3.71	3.84
6245	NASDAQ	CHK	Wed, Dec 20, 2017	3.66	3.80	3.60	3.78
6244	NASDAQ	CHK	Tue, Dec 19, 2017	3.69	3.74	3.61	3.61
6243	NASDAQ	CHK	Mon, Dec 18, 2017	3.57	3.70	3.52	3.69
6242	NASDAQ	CHK	Fri, Dec 15, 2017	3.66	3.69	3.50	3.51
6241	NASDAQ	CHK	Thu, Dec 14, 2017	3.72	3.81	3.64	3.64
6240	NASDAQ	CHK	Wed, Dec 13, 2017	3.83	3.86	3.71	3.72
6239	NASDAQ	CHK	Tue, Dec 12, 2017	3.89	3.90	3.75	3.81
6238	NASDAQ	CHK	Mon, Dec 11, 2017	3.71	3.88	3.71	3.83
6237	NASDAQ	CHK	Fri, Dec 8, 2017	3.75	3.80	3.66	3.68
6236	NASDAQ	CHK	Thu, Dec 7, 2017	3.81	3.81	3.69	3.70
6235	NASDAQ	CHK	Wed, Dec 6, 2017	3.92	3.94	3.76	3.77
6234	NASDAQ	CHK	Tue, Dec 5, 2017	3.98	4.04	3.92	3.92
6233	NASDAQ	CHK	Mon, Dec 4, 2017	4.08	4.14	3.91	3.92
6232	NASDAQ	CHK	Fri, Dec 1, 2017	4.10	4.24	4.07	4.09
6231	NASDAQ	CHK	Thu, Nov 30, 2017	4.05	4.25	4.04	4.07
6230	NASDAQ	CHK	Wed, Nov 29, 2017	3.89	4.07	3.87	4.05
6229	NASDAQ	CHK	Tue, Nov 28, 2017	3.83	3.90	3.77	3.87
6228	NASDAQ	CHK	Mon, Nov 27, 2017	3.92	3.93	3.80	3.81
6227	NASDAQ	CHK	Fri, Nov 24, 2017	4.00	4.05	3.90	3.92
6226	NASDAQ	CHK	Wed, Nov 22, 2017	3.87	3.98	3.85	3.97
6225	NASDAQ	CHK	Tue, Nov 21, 2017	3.90	3.94	3.80	3.81
6224	NASDAQ	CHK	Mon, Nov 20, 2017	3.94	4.05	3.85	3.87
6223	NASDAQ	CHK	Fri, Nov 17, 2017	3.90	4.05	3.89	4.02
6222	NASDAQ	CHK	Thu, Nov 16, 2017	3.87	3.94	3.83	3.85
6221	NASDAQ	CHK	Wed, Nov 15, 2017	3.92	3.98	3.85	3.85
6220	NASDAQ	CHK	Tue, Nov 14, 2017	4.12	4.16	3.94	3.94
6219	NASDAQ	CHK	Mon, Nov 13, 2017	4.11	4.27	4.07	4.15
6218	NASDAQ	CHK	Fri, Nov 10, 2017	4.13	4.19	4.04	4.14
6217	NASDAQ	CHK	Thu, Nov 9, 2017	4.00	4.20	3.97	4.11
6216	NASDAQ	CHK	Wed, Nov 8, 2017	4.16	4.17	3.97	3.97
6215	NASDAQ	CHK	Tue, Nov 7, 2017	4.15	4.22	4.08	4.18
6214	NASDAQ	CHK	Mon, Nov 6, 2017	3.78	4.18	3.78	4.18
6213	NASDAQ	CHK	Fri, Nov 3, 2017	3.65	3.79	3.62	3.74
6212	NASDAQ	CHK	Thu, Nov 2, 2017	3.78	3.81	3.65	3.66
6211	NASDAQ	CHK	Wed, Nov 1, 2017	3.98	4.07	3.96	3.96
6210	NASDAQ	CHK	Tue, Oct 31, 2017	3.80	3.94	3.76	3.90
6209	NASDAQ	CHK	Mon, Oct 30, 2017	3.75	3.99	3.73	3.84
6208	NASDAQ	CHK	Fri, Oct 27, 2017	3.49	3.78	3.47	3.77
6207	NASDAQ	CHK	Thu, Oct 26, 2017	3.54	3.56	3.41	3.53
6206	NASDAQ	CHK	Wed, Oct 25, 2017	3.61	3.64	3.45	3.55
6205	NASDAQ	CHK	Tue, Oct 24, 2017	3.65	3.69	3.60	3.65
6204	NASDAQ	CHK	Mon, Oct 23, 2017	3.80	3.83	3.60	3.61
6203	NASDAQ	CHK	Fri, Oct 20, 2017	3.84	3.86	3.77	3.80
6202	NASDAQ	CHK	Thu, Oct 19, 2017	3.70	3.88	3.70	3.84
6201	NASDAQ	CHK	Wed, Oct 18, 2017	3.80	3.88	3.73	3.77
6200	NASDAQ	CHK	Tue, Oct 17, 2017	3.86	3.87	3.73	3.78
6199	NASDAQ	CHK	Mon, Oct 16, 2017	3.92	3.95	3.82	3.82
6198	NASDAQ	CHK	Fri, Oct 13, 2017	3.90	3.93	3.85	3.88
6197	NASDAQ	CHK	Thu, Oct 12, 2017	3.90	3.93	3.78	3.85
6196	NASDAQ	CHK	Wed, Oct 11, 2017	3.92	3.98	3.76	3.95
6195	NASDAQ	CHK	Tue, Oct 10, 2017	4.22	4.23	3.91	3.91
6194	NASDAQ	CHK	Mon, Oct 9, 2017	4.20	4.22	4.13	4.19
6193	NASDAQ	CHK	Fri, Oct 6, 2017	4.26	4.27	4.12	4.20
6192	NASDAQ	CHK	Thu, Oct 5, 2017	4.27	4.33	4.26	4.30
6191	NASDAQ	CHK	Wed, Oct 4, 2017	4.28	4.32	4.23	4.27
6190	NASDAQ	CHK	Tue, Oct 3, 2017	4.31	4.34	4.26	4.29
6189	NASDAQ	CHK	Mon, Oct 2, 2017	4.15	4.38	4.08	4.35
6188	NASDAQ	CHK	Fri, Sep 29, 2017	4.34	4.38	4.28	4.30
6187	NASDAQ	CHK	Thu, Sep 28, 2017	4.47	4.49	4.25	4.35
6186	NASDAQ	CHK	Wed, Sep 27, 2017	4.38	4.45	4.30	4.42
6185	NASDAQ	CHK	Tue, Sep 26, 2017	4.33	4.44	4.29	4.37
6184	NASDAQ	CHK	Mon, Sep 25, 2017	4.27	4.39	4.27	4.37
6183	NASDAQ	CHK	Fri, Sep 22, 2017	4.16	4.25	4.14	4.22
6182	NASDAQ	CHK	Thu, Sep 21, 2017	4.15	4.19	4.08	4.17
6181	NASDAQ	CHK	Wed, Sep 20, 2017	4.05	4.25	4.04	4.19
6180	NASDAQ	CHK	Tue, Sep 19, 2017	4.08	4.10	3.98	4.04
6179	NASDAQ	CHK	Mon, Sep 18, 2017	4.03	4.12	3.95	4.05
6178	NASDAQ	CHK	Fri, Sep 15, 2017	4.10	4.11	3.95	4.00
6177	NASDAQ	CHK	Thu, Sep 14, 2017	4.04	4.18	4.02	4.10
6176	NASDAQ	CHK	Wed, Sep 13, 2017	3.82	4.04	3.81	3.94
6175	NASDAQ	CHK	Tue, Sep 12, 2017	3.66	3.85	3.65	3.74
6174	NASDAQ	CHK	Mon, Sep 11, 2017	3.66	3.70	3.61	3.63
6173	NASDAQ	CHK	Fri, Sep 8, 2017	3.83	3.86	3.56	3.64
6172	NASDAQ	CHK	Thu, Sep 7, 2017	3.75	3.90	3.75	3.87
6171	NASDAQ	CHK	Wed, Sep 6, 2017	3.74	3.82	3.71	3.76
6170	NASDAQ	CHK	Tue, Sep 5, 2017	3.78	3.83	3.68	3.70
6169	NASDAQ	CHK	Fri, Sep 1, 2017	3.65	3.79	3.62	3.76
6168	NASDAQ	CHK	Thu, Aug 31, 2017	3.64	3.72	3.62	3.64
6167	NASDAQ	CHK	Wed, Aug 30, 2017	3.61	3.68	3.56	3.61
6166	NASDAQ	CHK	Tue, Aug 29, 2017	3.59	3.66	3.55	3.64
6165	NASDAQ	CHK	Mon, Aug 28, 2017	3.79	3.83	3.59	3.65
6164	NASDAQ	CHK	Fri, Aug 25, 2017	3.89	3.89	3.79	3.79
6163	NASDAQ	CHK	Thu, Aug 24, 2017	3.88	3.96	3.82	3.86
6162	NASDAQ	CHK	Wed, Aug 23, 2017	3.83	3.96	3.79	3.89
6161	NASDAQ	CHK	Tue, Aug 22, 2017	3.83	3.88	3.81	3.85
6160	NASDAQ	CHK	Mon, Aug 21, 2017	3.93	3.94	3.76	3.82
6159	NASDAQ	CHK	Fri, Aug 18, 2017	3.85	4.01	3.82	3.96
6158	NASDAQ	CHK	Thu, Aug 17, 2017	3.96	4.04	3.81	3.88
6157	NASDAQ	CHK	Wed, Aug 16, 2017	4.00	4.03	3.90	4.00
6156	NASDAQ	CHK	Tue, Aug 15, 2017	4.10	4.10	3.92	3.98
6155	NASDAQ	CHK	Mon, Aug 14, 2017	4.14	4.18	4.06	4.07
6154	NASDAQ	CHK	Fri, Aug 11, 2017	4.11	4.17	4.05	4.14
6153	NASDAQ	CHK	Thu, Aug 10, 2017	4.38	4.44	4.13	4.14
6152	NASDAQ	CHK	Wed, Aug 9, 2017	4.43	4.48	4.31	4.37
6151	NASDAQ	CHK	Tue, Aug 8, 2017	4.35	4.48	4.34	4.40
6150	NASDAQ	CHK	Mon, Aug 7, 2017	4.49	4.51	4.32	4.35
6149	NASDAQ	CHK	Fri, Aug 4, 2017	4.53	4.59	4.47	4.53
6148	NASDAQ	CHK	Thu, Aug 3, 2017	4.78	4.78	4.50	4.50
6147	NASDAQ	CHK	Wed, Aug 2, 2017	4.83	4.83	4.61	4.62
6146	NASDAQ	CHK	Tue, Aug 1, 2017	4.94	4.97	4.78	4.79
6145	NASDAQ	CHK	Mon, Jul 31, 2017	5.04	5.05	4.84	4.96
6144	NASDAQ	CHK	Fri, Jul 28, 2017	5.05	5.20	4.97	5.06
6143	NASDAQ	CHK	Thu, Jul 27, 2017	4.85	5.07	4.77	5.06
6142	NASDAQ	CHK	Wed, Jul 26, 2017	4.90	4.95	4.78	4.84
6141	NASDAQ	CHK	Tue, Jul 25, 2017	4.76	4.94	4.75	4.85
6140	NASDAQ	CHK	Mon, Jul 24, 2017	4.73	4.76	4.65	4.66
6139	NASDAQ	CHK	Fri, Jul 21, 2017	4.83	4.87	4.66	4.69
6138	NASDAQ	CHK	Thu, Jul 20, 2017	4.98	5.02	4.84	4.84
6137	NASDAQ	CHK	Wed, Jul 19, 2017	4.76	4.96	4.74	4.96
6136	NASDAQ	CHK	Tue, Jul 18, 2017	4.90	4.90	4.70	4.76
6135	NASDAQ	CHK	Mon, Jul 17, 2017	4.88	4.94	4.81	4.85
6134	NASDAQ	CHK	Fri, Jul 14, 2017	4.81	4.90	4.80	4.87
6133	NASDAQ	CHK	Thu, Jul 13, 2017	4.65	4.78	4.64	4.78
6132	NASDAQ	CHK	Wed, Jul 12, 2017	4.79	4.85	4.62	4.67
6131	NASDAQ	CHK	Tue, Jul 11, 2017	4.66	4.77	4.57	4.72
6130	NASDAQ	CHK	Mon, Jul 10, 2017	4.51	4.73	4.49	4.66
6129	NASDAQ	CHK	Fri, Jul 7, 2017	4.64	4.65	4.42	4.54
6128	NASDAQ	CHK	Thu, Jul 6, 2017	4.82	4.87	4.65	4.66
6127	NASDAQ	CHK	Wed, Jul 5, 2017	5.03	5.03	4.72	4.78
6126	NASDAQ	CHK	Mon, Jul 3, 2017	5.01	5.14	5.00	5.12
6125	NASDAQ	CHK	Fri, Jun 30, 2017	5.00	5.05	4.91	4.97
6124	NASDAQ	CHK	Thu, Jun 29, 2017	4.92	5.08	4.88	4.96
6123	NASDAQ	CHK	Wed, Jun 28, 2017	4.80	4.94	4.75	4.86
6122	NASDAQ	CHK	Tue, Jun 27, 2017	4.77	4.86	4.68	4.80
6121	NASDAQ	CHK	Mon, Jun 26, 2017	4.59	4.79	4.55	4.67
6120	NASDAQ	CHK	Fri, Jun 23, 2017	4.55	4.59	4.46	4.57
6119	NASDAQ	CHK	Thu, Jun 22, 2017	4.58	4.63	4.49	4.50
6118	NASDAQ	CHK	Wed, Jun 21, 2017	4.84	4.85	4.38	4.52
6117	NASDAQ	CHK	Tue, Jun 20, 2017	4.92	4.95	4.77	4.91
6116	NASDAQ	CHK	Mon, Jun 19, 2017	5.09	5.18	4.98	4.99
6115	NASDAQ	CHK	Fri, Jun 16, 2017	5.05	5.15	5.00	5.10
6114	NASDAQ	CHK	Thu, Jun 15, 2017	4.94	5.11	4.92	5.00
6113	NASDAQ	CHK	Wed, Jun 14, 2017	5.19	5.19	4.97	5.02
6112	NASDAQ	CHK	Tue, Jun 13, 2017	5.07	5.29	5.03	5.28
6111	NASDAQ	CHK	Mon, Jun 12, 2017	5.05	5.17	5.03	5.06
6110	NASDAQ	CHK	Fri, Jun 9, 2017	4.78	5.05	4.77	4.97
6109	NASDAQ	CHK	Thu, Jun 8, 2017	4.79	4.84	4.70	4.74
6108	NASDAQ	CHK	Wed, Jun 7, 2017	4.97	5.08	4.74	4.80
6107	NASDAQ	CHK	Tue, Jun 6, 2017	4.91	5.07	4.79	5.04
6106	NASDAQ	CHK	Mon, Jun 5, 2017	4.92	5.00	4.88	4.89
6105	NASDAQ	CHK	Fri, Jun 2, 2017	5.03	5.04	4.90	4.96
6104	NASDAQ	CHK	Thu, Jun 1, 2017	5.10	5.22	5.02	5.10
6103	NASDAQ	CHK	Wed, May 31, 2017	5.06	5.09	4.90	5.06
6102	NASDAQ	CHK	Tue, May 30, 2017	5.20	5.26	5.04	5.10
6101	NASDAQ	CHK	Fri, May 26, 2017	5.24	5.30	5.15	5.29
6100	NASDAQ	CHK	Thu, May 25, 2017	5.51	5.68	5.13	5.18
6099	NASDAQ	CHK	Wed, May 24, 2017	5.67	5.81	5.51	5.55
6098	NASDAQ	CHK	Tue, May 23, 2017	5.69	5.76	5.65	5.67
6097	NASDAQ	CHK	Mon, May 22, 2017	5.87	5.87	5.67	5.73
6096	NASDAQ	CHK	Fri, May 19, 2017	5.67	5.82	5.65	5.78
6095	NASDAQ	CHK	Thu, May 18, 2017	5.43	5.60	5.39	5.57
6094	NASDAQ	CHK	Wed, May 17, 2017	5.51	5.66	5.40	5.49
6093	NASDAQ	CHK	Tue, May 16, 2017	5.60	5.70	5.50	5.54
6092	NASDAQ	CHK	Mon, May 15, 2017	5.81	5.86	5.52	5.57
6091	NASDAQ	CHK	Fri, May 12, 2017	5.71	5.76	5.60	5.63
6090	NASDAQ	CHK	Thu, May 11, 2017	5.78	5.83	5.63	5.72
6089	NASDAQ	CHK	Wed, May 10, 2017	5.49	5.80	5.47	5.75
6088	NASDAQ	CHK	Tue, May 9, 2017	5.53	5.55	5.39	5.40
6087	NASDAQ	CHK	Mon, May 8, 2017	5.43	5.59	5.37	5.55
6086	NASDAQ	CHK	Fri, May 5, 2017	5.16	5.46	5.14	5.46
6085	NASDAQ	CHK	Thu, May 4, 2017	5.39	5.40	5.00	5.13
6084	NASDAQ	CHK	Wed, May 3, 2017	5.30	5.62	5.20	5.54
6083	NASDAQ	CHK	Tue, May 2, 2017	5.36	5.44	5.25	5.32
6082	NASDAQ	CHK	Mon, May 1, 2017	5.25	5.34	5.22	5.31
6081	NASDAQ	CHK	Fri, Apr 28, 2017	5.35	5.36	5.20	5.26
6080	NASDAQ	CHK	Thu, Apr 27, 2017	5.40	5.40	5.15	5.29
6079	NASDAQ	CHK	Wed, Apr 26, 2017	5.44	5.66	5.42	5.47
6078	NASDAQ	CHK	Tue, Apr 25, 2017	5.36	5.53	5.25	5.51
6077	NASDAQ	CHK	Mon, Apr 24, 2017	5.56	5.58	5.32	5.38
6076	NASDAQ	CHK	Fri, Apr 21, 2017	5.56	5.64	5.45	5.52
6075	NASDAQ	CHK	Thu, Apr 20, 2017	5.54	5.70	5.51	5.56
6074	NASDAQ	CHK	Wed, Apr 19, 2017	5.66	5.73	5.48	5.50
6073	NASDAQ	CHK	Tue, Apr 18, 2017	5.62	5.79	5.55	5.66
6072	NASDAQ	CHK	Mon, Apr 17, 2017	5.87	5.91	5.61	5.69
6071	NASDAQ	CHK	Thu, Apr 13, 2017	6.17	6.18	5.88	5.89
6070	NASDAQ	CHK	Wed, Apr 12, 2017	6.18	6.39	6.12	6.15
6069	NASDAQ	CHK	Tue, Apr 11, 2017	6.20	6.21	6.05	6.18
6068	NASDAQ	CHK	Mon, Apr 10, 2017	6.25	6.30	6.19	6.23
6067	NASDAQ	CHK	Fri, Apr 7, 2017	6.28	6.32	6.16	6.20
6066	NASDAQ	CHK	Thu, Apr 6, 2017	6.19	6.40	6.16	6.28
6065	NASDAQ	CHK	Wed, Apr 5, 2017	6.41	6.59	6.01	6.11
6064	NASDAQ	CHK	Tue, Apr 4, 2017	5.90	6.33	5.83	6.32
6063	NASDAQ	CHK	Mon, Apr 3, 2017	6.01	6.05	5.72	5.92
6062	NASDAQ	CHK	Fri, Mar 31, 2017	5.83	5.95	5.81	5.94
6061	NASDAQ	CHK	Thu, Mar 30, 2017	5.90	6.00	5.73	5.85
6060	NASDAQ	CHK	Wed, Mar 29, 2017	5.42	5.95	5.41	5.81
6059	NASDAQ	CHK	Tue, Mar 28, 2017	5.19	5.42	5.14	5.39
6058	NASDAQ	CHK	Mon, Mar 27, 2017	5.15	5.25	5.06	5.16
6057	NASDAQ	CHK	Fri, Mar 24, 2017	5.17	5.30	5.11	5.22
6056	NASDAQ	CHK	Thu, Mar 23, 2017	5.07	5.20	5.00	5.09
6055	NASDAQ	CHK	Wed, Mar 22, 2017	5.02	5.11	4.95	5.00
6054	NASDAQ	CHK	Tue, Mar 21, 2017	5.21	5.23	5.02	5.07
6053	NASDAQ	CHK	Mon, Mar 20, 2017	5.21	5.29	5.11	5.18
6052	NASDAQ	CHK	Fri, Mar 17, 2017	5.46	5.54	5.26	5.29
6051	NASDAQ	CHK	Thu, Mar 16, 2017	5.50	5.52	5.34	5.45
6050	NASDAQ	CHK	Wed, Mar 15, 2017	5.35	5.49	5.23	5.45
6049	NASDAQ	CHK	Tue, Mar 14, 2017	5.22	5.27	5.02	5.24
6048	NASDAQ	CHK	Mon, Mar 13, 2017	5.17	5.36	5.17	5.33
6047	NASDAQ	CHK	Fri, Mar 10, 2017	5.17	5.22	5.01	5.15
6046	NASDAQ	CHK	Thu, Mar 9, 2017	4.91	5.15	4.88	5.13
6045	NASDAQ	CHK	Wed, Mar 8, 2017	5.26	5.30	4.92	4.94
6044	NASDAQ	CHK	Tue, Mar 7, 2017	5.38	5.40	5.26	5.26
6043	NASDAQ	CHK	Mon, Mar 6, 2017	5.30	5.42	5.27	5.35
6042	NASDAQ	CHK	Fri, Mar 3, 2017	5.39	5.51	5.30	5.32
6041	NASDAQ	CHK	Thu, Mar 2, 2017	5.49	5.53	5.26	5.36
6040	NASDAQ	CHK	Wed, Mar 1, 2017	5.50	5.65	5.49	5.57
6039	NASDAQ	CHK	Tue, Feb 28, 2017	5.57	5.63	5.43	5.45
6038	NASDAQ	CHK	Mon, Feb 27, 2017	5.68	5.76	5.51	5.62
6037	NASDAQ	CHK	Fri, Feb 24, 2017	5.69	5.89	5.60	5.66
6036	NASDAQ	CHK	Thu, Feb 23, 2017	6.07	6.08	5.38	5.75
6035	NASDAQ	CHK	Wed, Feb 22, 2017	6.03	6.09	5.90	5.92
6034	NASDAQ	CHK	Tue, Feb 21, 2017	6.14	6.18	6.00	6.08
6033	NASDAQ	CHK	Fri, Feb 17, 2017	6.04	6.16	6.02	6.10
6032	NASDAQ	CHK	Thu, Feb 16, 2017	6.34	6.40	6.07	6.08
6031	NASDAQ	CHK	Wed, Feb 15, 2017	6.43	6.45	6.30	6.32
6030	NASDAQ	CHK	Tue, Feb 14, 2017	6.41	6.45	6.34	6.44
6029	NASDAQ	CHK	Mon, Feb 13, 2017	6.35	6.43	6.28	6.33
6028	NASDAQ	CHK	Fri, Feb 10, 2017	6.41	6.50	6.33	6.38
6027	NASDAQ	CHK	Thu, Feb 9, 2017	6.15	6.39	6.15	6.31
6026	NASDAQ	CHK	Wed, Feb 8, 2017	6.08	6.22	5.92	6.12
6025	NASDAQ	CHK	Tue, Feb 7, 2017	6.38	6.41	6.08	6.17
6024	NASDAQ	CHK	Mon, Feb 6, 2017	6.60	6.65	6.37	6.38
6023	NASDAQ	CHK	Fri, Feb 3, 2017	6.40	6.59	6.38	6.57
6022	NASDAQ	CHK	Thu, Feb 2, 2017	6.37	6.52	6.26	6.45
6021	NASDAQ	CHK	Wed, Feb 1, 2017	6.51	6.59	6.31	6.40
6020	NASDAQ	CHK	Tue, Jan 31, 2017	6.43	6.49	6.33	6.45
6019	NASDAQ	CHK	Mon, Jan 30, 2017	6.83	6.86	6.41	6.46
6018	NASDAQ	CHK	Fri, Jan 27, 2017	7.02	7.10	6.86	6.92
6017	NASDAQ	CHK	Thu, Jan 26, 2017	7.20	7.29	7.07	7.12
6016	NASDAQ	CHK	Wed, Jan 25, 2017	7.05	7.26	7.01	7.13
6015	NASDAQ	CHK	Tue, Jan 24, 2017	6.72	7.00	6.67	6.91
6014	NASDAQ	CHK	Mon, Jan 23, 2017	6.66	6.81	6.52	6.68
6013	NASDAQ	CHK	Fri, Jan 20, 2017	6.69	6.87	6.63	6.69
6012	NASDAQ	CHK	Thu, Jan 19, 2017	6.92	6.97	6.55	6.62
6011	NASDAQ	CHK	Wed, Jan 18, 2017	6.95	7.04	6.92	6.98
6010	NASDAQ	CHK	Tue, Jan 17, 2017	6.94	7.10	6.88	7.01
6009	NASDAQ	CHK	Fri, Jan 13, 2017	6.91	6.94	6.86	6.92
6008	NASDAQ	CHK	Thu, Jan 12, 2017	6.99	7.08	6.87	6.93
6007	NASDAQ	CHK	Wed, Jan 11, 2017	6.94	7.01	6.85	6.92
6006	NASDAQ	CHK	Tue, Jan 10, 2017	6.96	7.01	6.87	6.92
6005	NASDAQ	CHK	Mon, Jan 9, 2017	6.91	6.94	6.78	6.87
6004	NASDAQ	CHK	Fri, Jan 6, 2017	7.25	7.28	6.99	7.01
6003	NASDAQ	CHK	Thu, Jan 5, 2017	7.06	7.19	6.89	7.18
6002	NASDAQ	CHK	Wed, Jan 4, 2017	7.00	7.07	6.85	7.00
6001	NASDAQ	CHK	Tue, Jan 3, 2017	7.20	7.32	6.78	6.92
6000	NASDAQ	CHK	Fri, Dec 30, 2016	7.15	7.21	7.00	7.02
5999	NASDAQ	CHK	Thu, Dec 29, 2016	7.22	7.29	7.07	7.16
5998	NASDAQ	CHK	Wed, Dec 28, 2016	7.61	7.62	7.16	7.23
5997	NASDAQ	CHK	Tue, Dec 27, 2016	7.48	7.65	7.43	7.59
5996	NASDAQ	CHK	Fri, Dec 23, 2016	7.36	7.49	7.33	7.44
5995	NASDAQ	CHK	Thu, Dec 22, 2016	7.42	7.57	7.30	7.34
5994	NASDAQ	CHK	Wed, Dec 21, 2016	7.39	7.59	7.34	7.43
5993	NASDAQ	CHK	Tue, Dec 20, 2016	7.31	7.43	7.26	7.29
5992	NASDAQ	CHK	Mon, Dec 19, 2016	7.13	7.36	7.09	7.31
5991	NASDAQ	CHK	Fri, Dec 16, 2016	7.12	7.23	7.03	7.18
5990	NASDAQ	CHK	Thu, Dec 15, 2016	7.00	7.19	6.85	7.03
5989	NASDAQ	CHK	Wed, Dec 14, 2016	7.20	7.44	7.05	7.08
5988	NASDAQ	CHK	Tue, Dec 13, 2016	7.50	7.52	7.06	7.37
5987	NASDAQ	CHK	Mon, Dec 12, 2016	8.10	8.20	7.32	7.35
5986	NASDAQ	CHK	Fri, Dec 9, 2016	7.74	7.80	7.63	7.72
5985	NASDAQ	CHK	Thu, Dec 8, 2016	7.71	7.75	7.42	7.60
5984	NASDAQ	CHK	Wed, Dec 7, 2016	7.77	7.94	7.48	7.58
5983	NASDAQ	CHK	Tue, Dec 6, 2016	7.44	7.75	7.34	7.58
5982	NASDAQ	CHK	Mon, Dec 5, 2016	7.58	7.65	7.42	7.48
5981	NASDAQ	CHK	Fri, Dec 2, 2016	7.03	7.30	7.00	7.23
5980	NASDAQ	CHK	Thu, Dec 1, 2016	7.26	7.35	6.97	7.05
5979	NASDAQ	CHK	Wed, Nov 30, 2016	6.93	7.11	6.74	7.00
5978	NASDAQ	CHK	Tue, Nov 29, 2016	6.17	6.42	6.03	6.37
5977	NASDAQ	CHK	Mon, Nov 28, 2016	6.74	6.75	6.32	6.34
5976	NASDAQ	CHK	Fri, Nov 25, 2016	6.57	6.65	6.52	6.59
5975	NASDAQ	CHK	Wed, Nov 23, 2016	6.34	6.64	6.32	6.64
5974	NASDAQ	CHK	Tue, Nov 22, 2016	6.46	6.48	6.23	6.44
5973	NASDAQ	CHK	Mon, Nov 21, 2016	6.21	6.40	6.17	6.36
5972	NASDAQ	CHK	Fri, Nov 18, 2016	5.96	6.04	5.89	5.94
5971	NASDAQ	CHK	Thu, Nov 17, 2016	6.00	6.11	5.84	5.89
5970	NASDAQ	CHK	Wed, Nov 16, 2016	5.99	6.12	5.81	5.91
5969	NASDAQ	CHK	Tue, Nov 15, 2016	5.65	6.13	5.64	6.05
5968	NASDAQ	CHK	Mon, Nov 14, 2016	5.52	5.60	5.28	5.47
5967	NASDAQ	CHK	Fri, Nov 11, 2016	5.62	5.69	5.35	5.43
5966	NASDAQ	CHK	Thu, Nov 10, 2016	5.99	6.09	5.68	5.70
5965	NASDAQ	CHK	Wed, Nov 9, 2016	5.27	5.82	5.26	5.77
5964	NASDAQ	CHK	Tue, Nov 8, 2016	5.29	5.46	5.22	5.31
5963	NASDAQ	CHK	Mon, Nov 7, 2016	5.45	5.55	5.38	5.45
5962	NASDAQ	CHK	Fri, Nov 4, 2016	5.26	5.50	5.25	5.29
5961	NASDAQ	CHK	Thu, Nov 3, 2016	5.75	5.80	5.33	5.40
5960	NASDAQ	CHK	Wed, Nov 2, 2016	5.18	5.43	5.14	5.31
5959	NASDAQ	CHK	Tue, Nov 1, 2016	5.53	5.64	5.18	5.36
5958	NASDAQ	CHK	Mon, Oct 31, 2016	5.74	5.80	5.49	5.51
5957	NASDAQ	CHK	Fri, Oct 28, 2016	6.03	6.06	5.76	5.79
5956	NASDAQ	CHK	Thu, Oct 27, 2016	5.96	6.19	5.93	6.08
5955	NASDAQ	CHK	Wed, Oct 26, 2016	5.88	6.19	5.71	6.00
5954	NASDAQ	CHK	Tue, Oct 25, 2016	6.38	6.50	6.10	6.11
5953	NASDAQ	CHK	Mon, Oct 24, 2016	6.65	6.72	6.29	6.36
5952	NASDAQ	CHK	Fri, Oct 21, 2016	6.96	7.11	6.59	6.68
5951	NASDAQ	CHK	Thu, Oct 20, 2016	6.55	6.95	6.36	6.91
5950	NASDAQ	CHK	Wed, Oct 19, 2016	6.63	6.85	6.60	6.72
5949	NASDAQ	CHK	Tue, Oct 18, 2016	6.51	6.60	6.32	6.52
5948	NASDAQ	CHK	Mon, Oct 17, 2016	6.54	6.68	6.28	6.35
5947	NASDAQ	CHK	Fri, Oct 14, 2016	6.45	6.70	6.45	6.56
5946	NASDAQ	CHK	Thu, Oct 13, 2016	6.20	6.55	6.04	6.43
5945	NASDAQ	CHK	Wed, Oct 12, 2016	6.25	6.30	6.10	6.29
5944	NASDAQ	CHK	Tue, Oct 11, 2016	6.38	6.46	6.11	6.28
5943	NASDAQ	CHK	Mon, Oct 10, 2016	6.45	6.62	6.41	6.44
5942	NASDAQ	CHK	Fri, Oct 7, 2016	6.68	6.73	6.34	6.35
5941	NASDAQ	CHK	Thu, Oct 6, 2016	6.91	6.97	6.60	6.65
5940	NASDAQ	CHK	Wed, Oct 5, 2016	6.45	6.90	6.45	6.80
5939	NASDAQ	CHK	Tue, Oct 4, 2016	6.46	6.55	6.36	6.37
5938	NASDAQ	CHK	Mon, Oct 3, 2016	6.34	6.45	6.18	6.40
5937	NASDAQ	CHK	Fri, Sep 30, 2016	6.13	6.30	6.03	6.27
5936	NASDAQ	CHK	Thu, Sep 29, 2016	6.41	6.53	6.06	6.12
5935	NASDAQ	CHK	Wed, Sep 28, 2016	6.29	6.80	6.21	6.75
5934	NASDAQ	CHK	Tue, Sep 27, 2016	6.50	6.51	5.97	6.23
5933	NASDAQ	CHK	Mon, Sep 26, 2016	6.71	6.84	6.56	6.62
5932	NASDAQ	CHK	Fri, Sep 23, 2016	6.78	6.94	6.50	6.63
5931	NASDAQ	CHK	Thu, Sep 22, 2016	6.90	6.99	6.75	6.87
5930	NASDAQ	CHK	Wed, Sep 21, 2016	6.74	6.82	6.60	6.74
5929	NASDAQ	CHK	Tue, Sep 20, 2016	6.79	6.96	6.51	6.56
5928	NASDAQ	CHK	Mon, Sep 19, 2016	7.41	7.47	6.81	6.81
5927	NASDAQ	CHK	Fri, Sep 16, 2016	7.09	7.37	7.06	7.35
5926	NASDAQ	CHK	Thu, Sep 15, 2016	7.20	7.38	7.10	7.25
5925	NASDAQ	CHK	Wed, Sep 14, 2016	7.35	7.41	7.01	7.17
5924	NASDAQ	CHK	Tue, Sep 13, 2016	7.76	7.78	7.16	7.38
5923	NASDAQ	CHK	Mon, Sep 12, 2016	7.73	8.15	7.53	8.05
5922	NASDAQ	CHK	Fri, Sep 9, 2016	7.65	7.80	7.43	7.62
5921	NASDAQ	CHK	Thu, Sep 8, 2016	6.93	7.81	6.87	7.74
5920	NASDAQ	CHK	Wed, Sep 7, 2016	6.94	6.95	6.76	6.81
5919	NASDAQ	CHK	Tue, Sep 6, 2016	6.70	6.90	6.66	6.80
5918	NASDAQ	CHK	Fri, Sep 2, 2016	6.31	6.70	6.30	6.60
5917	NASDAQ	CHK	Thu, Sep 1, 2016	6.23	6.35	6.15	6.25
5916	NASDAQ	CHK	Wed, Aug 31, 2016	6.44	6.51	6.18	6.35
5915	NASDAQ	CHK	Tue, Aug 30, 2016	6.51	6.65	6.40	6.51
5914	NASDAQ	CHK	Mon, Aug 29, 2016	6.36	6.49	6.25	6.44
5913	NASDAQ	CHK	Fri, Aug 26, 2016	6.37	6.54	6.35	6.40
5912	NASDAQ	CHK	Thu, Aug 25, 2016	6.25	6.44	6.20	6.33
5911	NASDAQ	CHK	Wed, Aug 24, 2016	6.56	6.60	6.24	6.26
5910	NASDAQ	CHK	Tue, Aug 23, 2016	6.04	6.58	6.03	6.46
5909	NASDAQ	CHK	Mon, Aug 22, 2016	5.84	6.09	5.82	6.09
5908	NASDAQ	CHK	Fri, Aug 19, 2016	6.14	6.22	5.93	6.09
5907	NASDAQ	CHK	Thu, Aug 18, 2016	5.75	6.25	5.75	6.20
5906	NASDAQ	CHK	Wed, Aug 17, 2016	5.91	5.93	5.50	5.68
5905	NASDAQ	CHK	Tue, Aug 16, 2016	5.60	5.94	5.42	5.91
5904	NASDAQ	CHK	Mon, Aug 15, 2016	5.15	5.53	5.07	5.50
5903	NASDAQ	CHK	Fri, Aug 12, 2016	5.06	5.09	4.92	5.02
5902	NASDAQ	CHK	Thu, Aug 11, 2016	5.09	5.10	4.82	5.03
5901	NASDAQ	CHK	Wed, Aug 10, 2016	4.86	4.93	4.77	4.80
5900	NASDAQ	CHK	Tue, Aug 9, 2016	5.07	5.08	4.77	4.81
5899	NASDAQ	CHK	Mon, Aug 8, 2016	4.95	5.15	4.90	5.01
5898	NASDAQ	CHK	Fri, Aug 5, 2016	5.18	5.19	4.86	4.89
5897	NASDAQ	CHK	Thu, Aug 4, 2016	5.04	5.28	4.95	5.13
5896	NASDAQ	CHK	Wed, Aug 3, 2016	4.95	5.30	4.82	5.29
5895	NASDAQ	CHK	Tue, Aug 2, 2016	5.20	5.24	4.75	4.90
5894	NASDAQ	CHK	Mon, Aug 1, 2016	5.33	5.35	5.06	5.09
5893	NASDAQ	CHK	Fri, Jul 29, 2016	5.15	5.46	5.15	5.42
5892	NASDAQ	CHK	Thu, Jul 28, 2016	5.18	5.32	5.13	5.19
5891	NASDAQ	CHK	Wed, Jul 27, 2016	5.59	5.60	5.10	5.19
5890	NASDAQ	CHK	Tue, Jul 26, 2016	5.03	5.37	5.00	5.35
5889	NASDAQ	CHK	Mon, Jul 25, 2016	5.37	5.39	5.01	5.14
5888	NASDAQ	CHK	Fri, Jul 22, 2016	5.14	5.50	5.01	5.39
5887	NASDAQ	CHK	Thu, Jul 21, 2016	4.92	5.25	4.88	4.97
5886	NASDAQ	CHK	Wed, Jul 20, 2016	4.41	4.83	4.36	4.74
5885	NASDAQ	CHK	Tue, Jul 19, 2016	4.53	4.59	4.43	4.50
5884	NASDAQ	CHK	Mon, Jul 18, 2016	4.44	4.60	4.30	4.60
5883	NASDAQ	CHK	Fri, Jul 15, 2016	4.54	4.66	4.41	4.42
5882	NASDAQ	CHK	Thu, Jul 14, 2016	4.43	4.58	4.37	4.50
5881	NASDAQ	CHK	Wed, Jul 13, 2016	4.50	4.57	4.27	4.35
5880	NASDAQ	CHK	Tue, Jul 12, 2016	4.33	4.59	4.28	4.58
5879	NASDAQ	CHK	Mon, Jul 11, 2016	4.31	4.34	4.17	4.18
5878	NASDAQ	CHK	Fri, Jul 8, 2016	4.35	4.37	4.19	4.24
5877	NASDAQ	CHK	Thu, Jul 7, 2016	4.45	4.57	4.22	4.23
5876	NASDAQ	CHK	Wed, Jul 6, 2016	4.26	4.35	4.22	4.35
5875	NASDAQ	CHK	Tue, Jul 5, 2016	4.39	4.43	4.13	4.30
5874	NASDAQ	CHK	Fri, Jul 1, 2016	4.25	4.63	4.21	4.59
5873	NASDAQ	CHK	Thu, Jun 30, 2016	4.39	4.40	4.15	4.28
5872	NASDAQ	CHK	Wed, Jun 29, 2016	4.45	4.50	4.33	4.42
5871	NASDAQ	CHK	Tue, Jun 28, 2016	4.28	4.32	4.18	4.28
5870	NASDAQ	CHK	Mon, Jun 27, 2016	4.25	4.29	3.93	4.06
5869	NASDAQ	CHK	Fri, Jun 24, 2016	4.26	4.47	4.17	4.37
5868	NASDAQ	CHK	Thu, Jun 23, 2016	4.57	4.65	4.52	4.64
5867	NASDAQ	CHK	Wed, Jun 22, 2016	4.72	4.72	4.50	4.51
5866	NASDAQ	CHK	Tue, Jun 21, 2016	4.54	4.65	4.48	4.62
5865	NASDAQ	CHK	Mon, Jun 20, 2016	4.81	4.82	4.54	4.66
5864	NASDAQ	CHK	Fri, Jun 17, 2016	4.39	4.65	4.35	4.51
5863	NASDAQ	CHK	Thu, Jun 16, 2016	4.21	4.35	4.03	4.24
5862	NASDAQ	CHK	Wed, Jun 15, 2016	4.27	4.50	4.23	4.28
5861	NASDAQ	CHK	Tue, Jun 14, 2016	4.24	4.45	4.10	4.28
5860	NASDAQ	CHK	Mon, Jun 13, 2016	4.37	4.60	4.17	4.33
5859	NASDAQ	CHK	Fri, Jun 10, 2016	4.67	4.73	4.37	4.42
5858	NASDAQ	CHK	Thu, Jun 9, 2016	4.75	4.92	4.52	4.88
5857	NASDAQ	CHK	Wed, Jun 8, 2016	4.89	5.14	4.83	4.97
5856	NASDAQ	CHK	Tue, Jun 7, 2016	4.67	4.86	4.55	4.67
5855	NASDAQ	CHK	Mon, Jun 6, 2016	4.24	4.59	4.17	4.57
5854	NASDAQ	CHK	Fri, Jun 3, 2016	4.26	4.30	4.07	4.09
5853	NASDAQ	CHK	Thu, Jun 2, 2016	4.30	4.44	4.22	4.25
5852	NASDAQ	CHK	Wed, Jun 1, 2016	4.21	4.39	4.09	4.37
5851	NASDAQ	CHK	Tue, May 31, 2016	4.23	4.45	4.23	4.29
5850	NASDAQ	CHK	Fri, May 27, 2016	4.16	4.21	4.04	4.16
5849	NASDAQ	CHK	Thu, May 26, 2016	4.63	4.74	4.11	4.23
5848	NASDAQ	CHK	Wed, May 25, 2016	4.23	4.49	4.19	4.35
5847	NASDAQ	CHK	Tue, May 24, 2016	3.68	4.07	3.64	4.05
5846	NASDAQ	CHK	Mon, May 23, 2016	3.69	3.78	3.56	3.67
5845	NASDAQ	CHK	Fri, May 20, 2016	3.92	3.95	3.69	3.72
5844	NASDAQ	CHK	Thu, May 19, 2016	3.78	3.89	3.59	3.86
5843	NASDAQ	CHK	Wed, May 18, 2016	3.96	4.06	3.81	3.85
5842	NASDAQ	CHK	Tue, May 17, 2016	3.99	4.25	3.87	3.93
5841	NASDAQ	CHK	Mon, May 16, 2016	4.19	4.33	3.85	3.90
5840	NASDAQ	CHK	Fri, May 13, 2016	3.98	4.25	3.98	4.06
5839	NASDAQ	CHK	Thu, May 12, 2016	4.59	4.63	4.08	4.17
5838	NASDAQ	CHK	Wed, May 11, 2016	4.25	4.82	4.12	4.36
5837	NASDAQ	CHK	Tue, May 10, 2016	4.23	4.36	3.93	4.30
5836	NASDAQ	CHK	Mon, May 9, 2016	4.72	4.90	4.03	4.10
5835	NASDAQ	CHK	Fri, May 6, 2016	5.52	5.83	4.55	4.59
5834	NASDAQ	CHK	Thu, May 5, 2016	6.30	6.47	5.70	5.71
5833	NASDAQ	CHK	Wed, May 4, 2016	6.09	6.18	5.62	5.65
5832	NASDAQ	CHK	Tue, May 3, 2016	6.38	6.42	5.73	5.80
5831	NASDAQ	CHK	Mon, May 2, 2016	6.83	6.85	6.40	6.59
5830	NASDAQ	CHK	Fri, Apr 29, 2016	6.98	7.15	6.60	6.87
5829	NASDAQ	CHK	Thu, Apr 28, 2016	7.10	7.59	6.78	6.78
5828	NASDAQ	CHK	Wed, Apr 27, 2016	6.78	7.15	6.73	7.14
5827	NASDAQ	CHK	Tue, Apr 26, 2016	6.48	6.60	6.37	6.60
5826	NASDAQ	CHK	Mon, Apr 25, 2016	6.59	6.71	6.30	6.40
5825	NASDAQ	CHK	Fri, Apr 22, 2016	6.29	6.59	6.24	6.55
5824	NASDAQ	CHK	Thu, Apr 21, 2016	6.64	6.73	6.16	6.19
5823	NASDAQ	CHK	Wed, Apr 20, 2016	6.05	6.53	6.01	6.42
5822	NASDAQ	CHK	Tue, Apr 19, 2016	6.19	6.37	6.07	6.12
5821	NASDAQ	CHK	Mon, Apr 18, 2016	5.49	6.07	5.49	5.96
5820	NASDAQ	CHK	Fri, Apr 15, 2016	5.76	6.18	5.71	6.03
5819	NASDAQ	CHK	Thu, Apr 14, 2016	6.13	6.19	5.74	6.01
5818	NASDAQ	CHK	Wed, Apr 13, 2016	6.11	6.56	5.92	6.06
5817	NASDAQ	CHK	Tue, Apr 12, 2016	4.84	6.15	4.83	6.05
5816	NASDAQ	CHK	Mon, Apr 11, 2016	4.12	4.50	4.10	4.50
5815	NASDAQ	CHK	Fri, Apr 8, 2016	3.79	3.85	3.68	3.76
5814	NASDAQ	CHK	Thu, Apr 7, 2016	3.74	3.82	3.54	3.61
5813	NASDAQ	CHK	Wed, Apr 6, 2016	3.87	3.92	3.65	3.73
5812	NASDAQ	CHK	Tue, Apr 5, 2016	3.72	3.72	3.72	3.76
5811	NASDAQ	CHK	Mon, Apr 4, 2016	3.86	3.90	3.63	3.72
5810	NASDAQ	CHK	Fri, Apr 1, 2016	3.98	4.10	3.80	3.83
5809	NASDAQ	CHK	Thu, Mar 31, 2016	3.97	4.16	3.95	4.12
5808	NASDAQ	CHK	Wed, Mar 30, 2016	4.18	4.34	3.99	4.01
5807	NASDAQ	CHK	Tue, Mar 29, 2016	3.99	4.09	3.84	4.04
5806	NASDAQ	CHK	Mon, Mar 28, 2016	4.24	4.24	4.00	4.15
5805	NASDAQ	CHK	Thu, Mar 24, 2016	3.86	4.45	3.78	4.25
5804	NASDAQ	CHK	Wed, Mar 23, 2016	4.74	4.83	4.10	4.13
5803	NASDAQ	CHK	Tue, Mar 22, 2016	4.78	4.94	4.66	4.82
5802	NASDAQ	CHK	Mon, Mar 21, 2016	4.93	5.05	4.79	4.88
5801	NASDAQ	CHK	Fri, Mar 18, 2016	5.08	5.30	4.77	4.91
5800	NASDAQ	CHK	Thu, Mar 17, 2016	4.62	4.88	4.45	4.79
5799	NASDAQ	CHK	Wed, Mar 16, 2016	4.30	4.59	4.26	4.39
5798	NASDAQ	CHK	Tue, Mar 15, 2016	4.20	4.26	3.95	4.18
5797	NASDAQ	CHK	Mon, Mar 14, 2016	4.61	4.61	4.60	4.60
5796	NASDAQ	CHK	Fri, Mar 11, 2016	4.88	4.99	4.64	4.70
5795	NASDAQ	CHK	Thu, Mar 10, 2016	4.62	4.74	4.35	4.61
5794	NASDAQ	CHK	Wed, Mar 9, 2016	4.56	4.70	4.30	4.63
5793	NASDAQ	CHK	Tue, Mar 8, 2016	5.05	5.06	4.10	4.30
5792	NASDAQ	CHK	Mon, Mar 7, 2016	5.38	5.76	5.18	5.23
5791	NASDAQ	CHK	Fri, Mar 4, 2016	4.59	5.43	4.30	5.08
5790	NASDAQ	CHK	Thu, Mar 3, 2016	3.37	4.72	3.32	4.27
5789	NASDAQ	CHK	Wed, Mar 2, 2016	2.62	3.75	2.60	3.40
5788	NASDAQ	CHK	Tue, Mar 1, 2016	2.64	2.78	2.55	2.76
5787	NASDAQ	CHK	Mon, Feb 29, 2016	2.82	2.82	2.53	2.61
5786	NASDAQ	CHK	Fri, Feb 26, 2016	2.89	2.89	2.65	2.70
5785	NASDAQ	CHK	Thu, Feb 25, 2016	2.64	2.90	2.50	2.56
5784	NASDAQ	CHK	Wed, Feb 24, 2016	2.44	2.74	2.35	2.69
5783	NASDAQ	CHK	Tue, Feb 23, 2016	2.53	2.71	2.16	2.19
5782	NASDAQ	CHK	Mon, Feb 22, 2016	2.09	2.49	2.07	2.39
5781	NASDAQ	CHK	Fri, Feb 19, 2016	1.94	2.03	1.90	2.00
5780	NASDAQ	CHK	Thu, Feb 18, 2016	1.97	2.14	1.90	1.98
5779	NASDAQ	CHK	Wed, Feb 17, 2016	1.94	1.99	1.85	1.88
5778	NASDAQ	CHK	Tue, Feb 16, 2016	1.68	1.91	1.65	1.86
5777	NASDAQ	CHK	Fri, Feb 12, 2016	1.86	1.89	1.56	1.59
5776	NASDAQ	CHK	Thu, Feb 11, 2016	1.66	1.81	1.53	1.78
5775	NASDAQ	CHK	Wed, Feb 10, 2016	1.99	2.01	1.63	1.70
5774	NASDAQ	CHK	Tue, Feb 9, 2016	2.09	2.09	1.80	1.95
5773	NASDAQ	CHK	Mon, Feb 8, 2016	2.56	2.59	1.50	2.04
5772	NASDAQ	CHK	Fri, Feb 5, 2016	3.21	3.26	3.03	3.06
5771	NASDAQ	CHK	Thu, Feb 4, 2016	3.40	3.65	3.19	3.26
5770	NASDAQ	CHK	Wed, Feb 3, 2016	3.08	3.39	2.75	3.36
5769	NASDAQ	CHK	Tue, Feb 2, 2016	3.12	3.14	2.99	2.99
5768	NASDAQ	CHK	Mon, Feb 1, 2016	3.32	3.38	3.10	3.21
5767	NASDAQ	CHK	Fri, Jan 29, 2016	3.19	3.46	3.16	3.39
5766	NASDAQ	CHK	Thu, Jan 28, 2016	3.52	3.57	3.10	3.16
5765	NASDAQ	CHK	Wed, Jan 27, 2016	3.22	3.63	3.17	3.28
5764	NASDAQ	CHK	Tue, Jan 26, 2016	3.08	3.25	2.88	3.19
5763	NASDAQ	CHK	Mon, Jan 25, 2016	3.27	3.60	2.95	2.95
5762	NASDAQ	CHK	Fri, Jan 22, 2016	3.82	4.15	3.46	3.51
5761	NASDAQ	CHK	Thu, Jan 21, 2016	3.25	3.66	3.17	3.55
5760	NASDAQ	CHK	Wed, Jan 20, 2016	2.86	3.45	2.69	3.32
5759	NASDAQ	CHK	Tue, Jan 19, 2016	3.58	3.61	2.95	3.08
5758	NASDAQ	CHK	Fri, Jan 15, 2016	3.48	3.60	3.28	3.56
5757	NASDAQ	CHK	Thu, Jan 14, 2016	3.61	3.82	3.56	3.71
5756	NASDAQ	CHK	Wed, Jan 13, 2016	4.10	4.18	3.61	3.64
5755	NASDAQ	CHK	Tue, Jan 12, 2016	4.27	4.28	3.75	4.05
5754	NASDAQ	CHK	Mon, Jan 11, 2016	4.49	4.50	4.08	4.17
5753	NASDAQ	CHK	Fri, Jan 8, 2016	4.44	4.53	4.26	4.44
5752	NASDAQ	CHK	Thu, Jan 7, 2016	4.43	4.64	4.36	4.41
5751	NASDAQ	CHK	Wed, Jan 6, 2016	4.77	4.88	4.60	4.68
5750	NASDAQ	CHK	Tue, Jan 5, 2016	4.89	5.09	4.84	5.01
5749	NASDAQ	CHK	Mon, Jan 4, 2016	4.44	4.97	4.40	4.95
5748	NASDAQ	CHK	Thu, Dec 31, 2015	4.38	4.55	4.30	4.50
5747	NASDAQ	CHK	Wed, Dec 30, 2015	4.26	4.44	4.15	4.40
5746	NASDAQ	CHK	Tue, Dec 29, 2015	4.21	4.58	4.12	4.58
5745	NASDAQ	CHK	Mon, Dec 28, 2015	4.38	4.38	4.00	4.07
5744	NASDAQ	CHK	Thu, Dec 24, 2015	4.49	4.60	4.35	4.45
5743	NASDAQ	CHK	Wed, Dec 23, 2015	4.05	4.44	3.95	4.40
5742	NASDAQ	CHK	Tue, Dec 22, 2015	4.06	4.09	3.93	3.98
5741	NASDAQ	CHK	Mon, Dec 21, 2015	4.03	4.22	3.87	4.06
5740	NASDAQ	CHK	Fri, Dec 18, 2015	3.76	4.05	3.65	4.05
5739	NASDAQ	CHK	Thu, Dec 17, 2015	3.89	3.93	3.56	3.72
5738	NASDAQ	CHK	Wed, Dec 16, 2015	3.78	3.97	3.57	3.90
5737	NASDAQ	CHK	Tue, Dec 15, 2015	4.09	4.13	3.75	3.76
5736	NASDAQ	CHK	Mon, Dec 14, 2015	4.05	4.13	3.89	4.00
5735	NASDAQ	CHK	Fri, Dec 11, 2015	4.43	4.44	4.10	4.16
5734	NASDAQ	CHK	Thu, Dec 10, 2015	4.39	4.67	4.34	4.56
5733	NASDAQ	CHK	Wed, Dec 9, 2015	4.46	4.67	4.30	4.47
5732	NASDAQ	CHK	Tue, Dec 8, 2015	4.05	4.45	4.03	4.40
5731	NASDAQ	CHK	Mon, Dec 7, 2015	4.27	4.30	4.06	4.27
5730	NASDAQ	CHK	Fri, Dec 4, 2015	4.85	4.85	4.47	4.55
5729	NASDAQ	CHK	Thu, Dec 3, 2015	5.43	5.49	4.69	4.87
5728	NASDAQ	CHK	Wed, Dec 2, 2015	5.43	5.71	5.34	5.52
5727	NASDAQ	CHK	Tue, Dec 1, 2015	5.27	5.59	5.15	5.51
5726	NASDAQ	CHK	Mon, Nov 30, 2015	5.30	5.39	5.11	5.27
5725	NASDAQ	CHK	Fri, Nov 27, 2015	5.35	5.38	5.20	5.26
5724	NASDAQ	CHK	Wed, Nov 25, 2015	5.37	5.55	5.25	5.41
5723	NASDAQ	CHK	Tue, Nov 24, 2015	5.29	5.57	5.20	5.49
5722	NASDAQ	CHK	Mon, Nov 23, 2015	5.05	5.39	5.04	5.14
5721	NASDAQ	CHK	Fri, Nov 20, 2015	5.41	5.42	5.06	5.08
5720	NASDAQ	CHK	Thu, Nov 19, 2015	5.50	5.64	5.28	5.40
5719	NASDAQ	CHK	Wed, Nov 18, 2015	5.96	6.18	5.80	6.00
5718	NASDAQ	CHK	Tue, Nov 17, 2015	6.19	6.25	5.80	5.87
5717	NASDAQ	CHK	Mon, Nov 16, 2015	6.11	6.36	6.00	6.34
5716	NASDAQ	CHK	Fri, Nov 13, 2015	6.37	6.38	6.03	6.10
5715	NASDAQ	CHK	Thu, Nov 12, 2015	6.46	6.52	6.25	6.32
5714	NASDAQ	CHK	Wed, Nov 11, 2015	7.04	7.07	6.50	6.54
5713	NASDAQ	CHK	Tue, Nov 10, 2015	7.26	7.28	7.00	7.06
5712	NASDAQ	CHK	Mon, Nov 9, 2015	7.35	7.51	7.25	7.27
5711	NASDAQ	CHK	Fri, Nov 6, 2015	7.37	7.68	7.26	7.34
5710	NASDAQ	CHK	Thu, Nov 5, 2015	7.34	7.90	7.13	7.52
5709	NASDAQ	CHK	Wed, Nov 4, 2015	7.29	7.64	6.96	7.46
5708	NASDAQ	CHK	Tue, Nov 3, 2015	7.39	8.00	7.37	7.61
5707	NASDAQ	CHK	Mon, Nov 2, 2015	6.94	7.60	6.91	7.45
5706	NASDAQ	CHK	Fri, Oct 30, 2015	7.00	7.19	6.76	7.13
5705	NASDAQ	CHK	Thu, Oct 29, 2015	7.04	7.28	6.86	6.94
5704	NASDAQ	CHK	Wed, Oct 28, 2015	6.75	7.37	6.67	6.97
5703	NASDAQ	CHK	Tue, Oct 27, 2015	7.03	7.03	6.50	6.72
5702	NASDAQ	CHK	Mon, Oct 26, 2015	7.63	7.68	7.11	7.13
5701	NASDAQ	CHK	Fri, Oct 23, 2015	7.71	8.05	7.50	7.83
5700	NASDAQ	CHK	Thu, Oct 22, 2015	7.89	8.01	7.65	7.80
5699	NASDAQ	CHK	Wed, Oct 21, 2015	8.14	8.14	7.80	7.87
5698	NASDAQ	CHK	Tue, Oct 20, 2015	8.10	8.33	7.84	8.19
5697	NASDAQ	CHK	Mon, Oct 19, 2015	8.20	8.32	7.94	8.09
5696	NASDAQ	CHK	Fri, Oct 16, 2015	8.45	8.49	8.06	8.40
5695	NASDAQ	CHK	Thu, Oct 15, 2015	8.17	8.37	7.99	8.35
5694	NASDAQ	CHK	Wed, Oct 14, 2015	8.01	8.30	7.95	8.22
5693	NASDAQ	CHK	Tue, Oct 13, 2015	8.13	8.46	7.92	7.99
5692	NASDAQ	CHK	Mon, Oct 12, 2015	8.87	8.87	8.14	8.24
5691	NASDAQ	CHK	Fri, Oct 9, 2015	9.38	9.55	8.79	8.88
5690	NASDAQ	CHK	Thu, Oct 8, 2015	9.05	9.38	8.67	9.34
5689	NASDAQ	CHK	Wed, Oct 7, 2015	9.11	9.44	8.47	9.15
5688	NASDAQ	CHK	Tue, Oct 6, 2015	8.47	9.00	8.33	8.98
5687	NASDAQ	CHK	Mon, Oct 5, 2015	7.98	8.53	7.96	8.42
5686	NASDAQ	CHK	Fri, Oct 2, 2015	7.15	7.89	7.02	7.89
5685	NASDAQ	CHK	Thu, Oct 1, 2015	7.27	7.59	6.95	7.21
5684	NASDAQ	CHK	Wed, Sep 30, 2015	6.88	7.33	6.84	7.33
5683	NASDAQ	CHK	Tue, Sep 29, 2015	6.82	7.00	6.69	6.79
5682	NASDAQ	CHK	Mon, Sep 28, 2015	7.20	7.35	6.57	6.71
5681	NASDAQ	CHK	Fri, Sep 25, 2015	7.83	7.87	7.16	7.39
5680	NASDAQ	CHK	Thu, Sep 24, 2015	7.44	7.80	7.20	7.76
5679	NASDAQ	CHK	Wed, Sep 23, 2015	8.01	8.08	7.56	7.58
5678	NASDAQ	CHK	Tue, Sep 22, 2015	8.41	8.48	7.96	8.00
5677	NASDAQ	CHK	Mon, Sep 21, 2015	8.73	8.84	8.49	8.58
5676	NASDAQ	CHK	Fri, Sep 18, 2015	8.46	8.96	8.23	8.96
5675	NASDAQ	CHK	Thu, Sep 17, 2015	8.83	8.98	8.54	8.61
5674	NASDAQ	CHK	Wed, Sep 16, 2015	8.04	9.00	8.03	9.00
5673	NASDAQ	CHK	Tue, Sep 15, 2015	7.95	8.23	7.82	7.89
5672	NASDAQ	CHK	Mon, Sep 14, 2015	7.57	8.02	7.45	7.92
5671	NASDAQ	CHK	Fri, Sep 11, 2015	7.49	7.61	7.37	7.57
5670	NASDAQ	CHK	Thu, Sep 10, 2015	7.73	7.84	7.51	7.59
5669	NASDAQ	CHK	Wed, Sep 9, 2015	7.75	7.98	7.53	7.63
5668	NASDAQ	CHK	Tue, Sep 8, 2015	7.80	7.93	7.44	7.67
5667	NASDAQ	CHK	Fri, Sep 4, 2015	7.25	7.41	7.20	7.27
5666	NASDAQ	CHK	Thu, Sep 3, 2015	7.40	7.65	7.26	7.44
5665	NASDAQ	CHK	Wed, Sep 2, 2015	7.67	7.68	7.06	7.38
5664	NASDAQ	CHK	Tue, Sep 1, 2015	7.59	8.05	7.45	7.57
5663	NASDAQ	CHK	Mon, Aug 31, 2015	7.25	7.84	7.02	7.81
5662	NASDAQ	CHK	Fri, Aug 28, 2015	7.13	7.73	7.02	7.39
5661	NASDAQ	CHK	Thu, Aug 27, 2015	6.55	7.13	6.53	7.02
5660	NASDAQ	CHK	Wed, Aug 26, 2015	6.24	6.35	6.03	6.34
5659	NASDAQ	CHK	Tue, Aug 25, 2015	6.97	6.97	6.01	6.03
5658	NASDAQ	CHK	Mon, Aug 24, 2015	6.11	7.04	6.07	6.61
5657	NASDAQ	CHK	Fri, Aug 21, 2015	7.09	7.24	6.87	6.87
5656	NASDAQ	CHK	Thu, Aug 20, 2015	7.35	7.50	7.15	7.15
5655	NASDAQ	CHK	Wed, Aug 19, 2015	7.77	7.81	7.22	7.34
5654	NASDAQ	CHK	Tue, Aug 18, 2015	7.54	8.05	7.50	7.76
5653	NASDAQ	CHK	Mon, Aug 17, 2015	7.40	7.71	7.37	7.57
5652	NASDAQ	CHK	Fri, Aug 14, 2015	7.50	7.65	7.27	7.49
5651	NASDAQ	CHK	Thu, Aug 13, 2015	7.83	7.89	7.48	7.50
5650	NASDAQ	CHK	Wed, Aug 12, 2015	8.10	8.32	7.99	8.02
5649	NASDAQ	CHK	Tue, Aug 11, 2015	8.20	8.41	8.05	8.21
5648	NASDAQ	CHK	Mon, Aug 10, 2015	8.40	8.93	8.21	8.63
5647	NASDAQ	CHK	Fri, Aug 7, 2015	8.11	9.08	8.11	8.32
5646	NASDAQ	CHK	Thu, Aug 6, 2015	7.15	8.44	7.01	8.19
5645	NASDAQ	CHK	Wed, Aug 5, 2015	8.25	8.36	6.85	7.03
5644	NASDAQ	CHK	Tue, Aug 4, 2015	8.28	8.43	7.96	8.00
5643	NASDAQ	CHK	Mon, Aug 3, 2015	8.56	8.65	8.08	8.15
5642	NASDAQ	CHK	Fri, Jul 31, 2015	8.88	9.01	8.62	8.66
5641	NASDAQ	CHK	Thu, Jul 30, 2015	9.09	9.29	8.92	8.97
5640	NASDAQ	CHK	Wed, Jul 29, 2015	8.92	9.36	8.82	9.15
5639	NASDAQ	CHK	Tue, Jul 28, 2015	8.49	9.09	8.40	9.00
5638	NASDAQ	CHK	Mon, Jul 27, 2015	8.28	8.60	8.11	8.37
5637	NASDAQ	CHK	Fri, Jul 24, 2015	8.70	8.75	8.20	8.28
5636	NASDAQ	CHK	Thu, Jul 23, 2015	9.02	9.23	8.40	8.71
5635	NASDAQ	CHK	Wed, Jul 22, 2015	9.25	9.49	9.00	9.05
5634	NASDAQ	CHK	Tue, Jul 21, 2015	10.07	10.14	9.24	9.29
5633	NASDAQ	CHK	Mon, Jul 20, 2015	10.89	10.92	10.23	10.27
5632	NASDAQ	CHK	Fri, Jul 17, 2015	11.59	11.59	10.80	10.94
5631	NASDAQ	CHK	Thu, Jul 16, 2015	11.40	11.69	11.15	11.58
5630	NASDAQ	CHK	Wed, Jul 15, 2015	11.38	11.48	10.94	11.29
5629	NASDAQ	CHK	Tue, Jul 14, 2015	10.92	11.39	10.86	11.38
5628	NASDAQ	CHK	Mon, Jul 13, 2015	11.28	11.32	10.86	10.90
5627	NASDAQ	CHK	Fri, Jul 10, 2015	11.75	11.88	11.27	11.37
5626	NASDAQ	CHK	Thu, Jul 9, 2015	11.77	11.88	11.59	11.68
5625	NASDAQ	CHK	Wed, Jul 8, 2015	11.22	11.51	10.84	11.31
5624	NASDAQ	CHK	Tue, Jul 7, 2015	10.42	11.90	9.94	11.46
5623	NASDAQ	CHK	Mon, Jul 6, 2015	10.51	10.78	10.30	10.42
5622	NASDAQ	CHK	Thu, Jul 2, 2015	10.69	10.81	10.61	10.77
5621	NASDAQ	CHK	Wed, Jul 1, 2015	11.20	11.21	10.50	10.55
5620	NASDAQ	CHK	Tue, Jun 30, 2015	11.15	11.31	10.97	11.17
5619	NASDAQ	CHK	Mon, Jun 29, 2015	11.29	11.42	10.94	11.03
5618	NASDAQ	CHK	Fri, Jun 26, 2015	11.06	11.17	11.00	11.16
5617	NASDAQ	CHK	Thu, Jun 25, 2015	11.38	11.49	11.00	11.11
5616	NASDAQ	CHK	Wed, Jun 24, 2015	11.74	11.93	11.55	11.55
5615	NASDAQ	CHK	Tue, Jun 23, 2015	11.87	12.06	11.78	11.78
5614	NASDAQ	CHK	Mon, Jun 22, 2015	11.77	11.99	11.57	11.89
5613	NASDAQ	CHK	Fri, Jun 19, 2015	11.86	11.95	11.55	11.79
5612	NASDAQ	CHK	Thu, Jun 18, 2015	12.15	12.23	11.86	11.88
5611	NASDAQ	CHK	Wed, Jun 17, 2015	12.61	12.68	12.01	12.09
5610	NASDAQ	CHK	Tue, Jun 16, 2015	12.19	12.55	12.11	12.53
5609	NASDAQ	CHK	Mon, Jun 15, 2015	12.16	12.53	12.12	12.21
5608	NASDAQ	CHK	Fri, Jun 12, 2015	12.44	12.48	12.10	12.25
5607	NASDAQ	CHK	Thu, Jun 11, 2015	12.90	12.95	12.45	12.50
5606	NASDAQ	CHK	Wed, Jun 10, 2015	13.35	13.45	13.00	13.06
5605	NASDAQ	CHK	Tue, Jun 9, 2015	13.32	13.43	13.19	13.22
5604	NASDAQ	CHK	Mon, Jun 8, 2015	13.15	13.26	12.92	13.16
5603	NASDAQ	CHK	Fri, Jun 5, 2015	13.01	13.26	12.89	13.15
5602	NASDAQ	CHK	Thu, Jun 4, 2015	13.42	13.47	12.98	13.04
5601	NASDAQ	CHK	Wed, Jun 3, 2015	13.93	13.98	13.44	13.56
5600	NASDAQ	CHK	Tue, Jun 2, 2015	13.91	14.10	13.85	14.05
5599	NASDAQ	CHK	Mon, Jun 1, 2015	14.11	14.14	13.86	13.86
5598	NASDAQ	CHK	Fri, May 29, 2015	14.09	14.27	13.92	14.11
5597	NASDAQ	CHK	Thu, May 28, 2015	14.72	14.74	14.00	14.05
5596	NASDAQ	CHK	Wed, May 27, 2015	14.87	15.04	14.68	14.76
5595	NASDAQ	CHK	Tue, May 26, 2015	14.91	14.96	14.72	14.92
5594	NASDAQ	CHK	Fri, May 22, 2015	15.13	15.37	15.03	15.06
5593	NASDAQ	CHK	Thu, May 21, 2015	14.85	15.33	14.82	15.31
5592	NASDAQ	CHK	Wed, May 20, 2015	14.64	14.91	14.43	14.75
5591	NASDAQ	CHK	Tue, May 19, 2015	14.80	14.93	14.42	14.57
5590	NASDAQ	CHK	Mon, May 18, 2015	14.85	14.92	14.55	14.89
5589	NASDAQ	CHK	Fri, May 15, 2015	15.00	15.04	14.59	15.00
5588	NASDAQ	CHK	Thu, May 14, 2015	15.28	15.57	15.03	15.09
5587	NASDAQ	CHK	Wed, May 13, 2015	15.61	15.66	15.11	15.23
5586	NASDAQ	CHK	Tue, May 12, 2015	15.30	15.76	15.20	15.45
5585	NASDAQ	CHK	Mon, May 11, 2015	15.29	15.40	15.00	15.18
5584	NASDAQ	CHK	Fri, May 8, 2015	14.72	15.29	14.36	15.28
5583	NASDAQ	CHK	Thu, May 7, 2015	14.60	14.61	14.16	14.50
5582	NASDAQ	CHK	Wed, May 6, 2015	16.38	16.54	14.58	14.72
5581	NASDAQ	CHK	Tue, May 5, 2015	16.68	16.70	15.82	15.86
5580	NASDAQ	CHK	Mon, May 4, 2015	16.58	16.98	16.13	16.39
5579	NASDAQ	CHK	Fri, May 1, 2015	15.79	16.76	15.53	16.54
5578	NASDAQ	CHK	Thu, Apr 30, 2015	15.17	15.84	14.75	15.77
5577	NASDAQ	CHK	Wed, Apr 29, 2015	14.54	15.11	14.45	15.10
5576	NASDAQ	CHK	Tue, Apr 28, 2015	14.43	14.65	14.38	14.55
5575	NASDAQ	CHK	Mon, Apr 27, 2015	14.58	14.69	14.34	14.39
5574	NASDAQ	CHK	Fri, Apr 24, 2015	14.48	14.70	14.43	14.54
5573	NASDAQ	CHK	Thu, Apr 23, 2015	14.47	14.68	14.44	14.54
5572	NASDAQ	CHK	Wed, Apr 22, 2015	14.67	14.71	14.29	14.41
5571	NASDAQ	CHK	Tue, Apr 21, 2015	15.32	15.39	14.53	14.57
5570	NASDAQ	CHK	Mon, Apr 20, 2015	15.47	15.65	15.29	15.30
5569	NASDAQ	CHK	Fri, Apr 17, 2015	15.65	15.69	15.36	15.45
5568	NASDAQ	CHK	Thu, Apr 16, 2015	16.04	16.04	15.42	15.87
5567	NASDAQ	CHK	Wed, Apr 15, 2015	15.38	16.16	15.16	16.02
5566	NASDAQ	CHK	Tue, Apr 14, 2015	14.92	15.34	14.92	15.25
5565	NASDAQ	CHK	Mon, Apr 13, 2015	15.01	15.02	14.56	14.77
5564	NASDAQ	CHK	Fri, Apr 10, 2015	15.26	15.31	14.90	14.93
5563	NASDAQ	CHK	Thu, Apr 9, 2015	15.16	15.26	14.94	15.23
5562	NASDAQ	CHK	Wed, Apr 8, 2015	15.50	15.54	15.06	15.10
5561	NASDAQ	CHK	Tue, Apr 7, 2015	15.22	15.49	15.02	15.35
5560	NASDAQ	CHK	Mon, Apr 6, 2015	14.77	15.25	14.70	15.15
5559	NASDAQ	CHK	Thu, Apr 2, 2015	14.22	14.69	14.20	14.59
5558	NASDAQ	CHK	Wed, Apr 1, 2015	14.45	14.57	14.27	14.35
5557	NASDAQ	CHK	Tue, Mar 31, 2015	13.88	14.27	13.81	14.16
5556	NASDAQ	CHK	Mon, Mar 30, 2015	14.18	14.22	13.71	13.97
5555	NASDAQ	CHK	Fri, Mar 27, 2015	14.14	14.19	13.81	14.03
5554	NASDAQ	CHK	Thu, Mar 26, 2015	14.64	14.71	14.13	14.22
5553	NASDAQ	CHK	Wed, Mar 25, 2015	14.30	14.43	14.15	14.34
5552	NASDAQ	CHK	Tue, Mar 24, 2015	14.75	14.88	14.16	14.26
5551	NASDAQ	CHK	Mon, Mar 23, 2015	13.65	14.16	13.63	14.11
5550	NASDAQ	CHK	Fri, Mar 20, 2015	13.68	13.77	13.60	13.61
5549	NASDAQ	CHK	Thu, Mar 19, 2015	13.56	13.80	13.38	13.50
5548	NASDAQ	CHK	Wed, Mar 18, 2015	13.66	14.24	13.55	14.13
5547	NASDAQ	CHK	Tue, Mar 17, 2015	13.73	13.94	13.67	13.81
5546	NASDAQ	CHK	Mon, Mar 16, 2015	13.60	13.99	13.47	13.96
5545	NASDAQ	CHK	Fri, Mar 13, 2015	13.78	13.91	13.48	13.80
5544	NASDAQ	CHK	Thu, Mar 12, 2015	14.29	14.36	13.90	13.92
5543	NASDAQ	CHK	Wed, Mar 11, 2015	14.02	14.43	13.94	14.29
5542	NASDAQ	CHK	Tue, Mar 10, 2015	14.26	14.32	13.68	13.84
5541	NASDAQ	CHK	Mon, Mar 9, 2015	15.07	15.12	14.22	14.24
5540	NASDAQ	CHK	Fri, Mar 6, 2015	15.81	16.17	15.07	15.17
5539	NASDAQ	CHK	Thu, Mar 5, 2015	15.40	15.98	15.07	15.92
5538	NASDAQ	CHK	Wed, Mar 4, 2015	16.26	16.34	15.32	15.49
5537	NASDAQ	CHK	Tue, Mar 3, 2015	16.60	16.74	16.18	16.20
5536	NASDAQ	CHK	Mon, Mar 2, 2015	16.71	16.71	16.23	16.60
5535	NASDAQ	CHK	Fri, Feb 27, 2015	17.29	17.30	16.63	16.68
5534	NASDAQ	CHK	Thu, Feb 26, 2015	17.72	17.98	17.11	17.20
5533	NASDAQ	CHK	Wed, Feb 25, 2015	18.47	18.55	17.54	17.98
5532	NASDAQ	CHK	Tue, Feb 24, 2015	19.96	20.05	19.63	19.88
5531	NASDAQ	CHK	Mon, Feb 23, 2015	19.95	20.04	19.59	19.71
5530	NASDAQ	CHK	Fri, Feb 20, 2015	20.41	20.65	20.13	20.30
5529	NASDAQ	CHK	Thu, Feb 19, 2015	20.16	20.58	20.07	20.40
5528	NASDAQ	CHK	Wed, Feb 18, 2015	20.94	21.17	20.74	20.75
5527	NASDAQ	CHK	Tue, Feb 17, 2015	20.93	21.29	20.77	21.26
5526	NASDAQ	CHK	Fri, Feb 13, 2015	20.86	21.24	20.73	21.08
5525	NASDAQ	CHK	Thu, Feb 12, 2015	20.44	20.70	20.38	20.50
5524	NASDAQ	CHK	Wed, Feb 11, 2015	20.04	20.10	19.61	20.06
5523	NASDAQ	CHK	Tue, Feb 10, 2015	20.54	20.55	19.88	20.23
5522	NASDAQ	CHK	Mon, Feb 9, 2015	20.96	21.24	20.43	20.49
5521	NASDAQ	CHK	Fri, Feb 6, 2015	21.08	21.22	20.73	20.79
5520	NASDAQ	CHK	Thu, Feb 5, 2015	20.81	21.12	20.55	20.85
5519	NASDAQ	CHK	Wed, Feb 4, 2015	20.59	20.89	20.20	20.52
5518	NASDAQ	CHK	Tue, Feb 3, 2015	20.78	21.49	20.63	21.01
5517	NASDAQ	CHK	Mon, Feb 2, 2015	19.56	20.60	19.46	20.52
5516	NASDAQ	CHK	Fri, Jan 30, 2015	19.00	19.48	18.76	19.18
5515	NASDAQ	CHK	Thu, Jan 29, 2015	19.38	19.49	18.63	19.21
5514	NASDAQ	CHK	Wed, Jan 28, 2015	20.05	20.07	19.11	19.13
5513	NASDAQ	CHK	Tue, Jan 27, 2015	20.01	20.38	19.89	20.25
5512	NASDAQ	CHK	Mon, Jan 26, 2015	19.62	20.26	19.56	20.14
5511	NASDAQ	CHK	Fri, Jan 23, 2015	19.71	20.16	19.52	19.66
5510	NASDAQ	CHK	Thu, Jan 22, 2015	19.95	20.05	18.90	19.62
5509	NASDAQ	CHK	Wed, Jan 21, 2015	19.27	19.91	19.18	19.87
5508	NASDAQ	CHK	Tue, Jan 20, 2015	18.44	19.45	18.14	19.08
5507	NASDAQ	CHK	Fri, Jan 16, 2015	18.51	19.14	18.40	19.03
5506	NASDAQ	CHK	Thu, Jan 15, 2015	18.85	19.05	18.07	18.33
5505	NASDAQ	CHK	Wed, Jan 14, 2015	17.48	18.84	17.42	18.76
5504	NASDAQ	CHK	Tue, Jan 13, 2015	17.71	18.03	17.53	17.85
5503	NASDAQ	CHK	Mon, Jan 12, 2015	18.23	18.29	17.63	17.69
5502	NASDAQ	CHK	Fri, Jan 9, 2015	18.58	18.69	18.02	18.37
5501	NASDAQ	CHK	Thu, Jan 8, 2015	17.96	18.70	17.56	18.41
5500	NASDAQ	CHK	Wed, Jan 7, 2015	18.19	18.30	17.77	17.93
5499	NASDAQ	CHK	Tue, Jan 6, 2015	18.00	18.73	17.77	17.99
5498	NASDAQ	CHK	Mon, Jan 5, 2015	19.33	19.34	18.42	18.49
5497	NASDAQ	CHK	Fri, Jan 2, 2015	19.42	19.90	19.04	19.76
5496	NASDAQ	CHK	Wed, Dec 31, 2014	19.46	19.99	19.23	19.57
5495	NASDAQ	CHK	Tue, Dec 30, 2014	19.80	20.08	19.51	19.64
5494	NASDAQ	CHK	Mon, Dec 29, 2014	20.00	20.16	19.80	20.01
5493	NASDAQ	CHK	Fri, Dec 26, 2014	20.00	20.18	19.50	19.71
5492	NASDAQ	CHK	Wed, Dec 24, 2014	20.19	20.29	19.60	19.84
5491	NASDAQ	CHK	Tue, Dec 23, 2014	19.43	20.35	19.20	20.29
5490	NASDAQ	CHK	Mon, Dec 22, 2014	19.00	19.20	18.30	18.42
5489	NASDAQ	CHK	Fri, Dec 19, 2014	19.28	19.89	18.65	19.86
5488	NASDAQ	CHK	Thu, Dec 18, 2014	19.81	19.92	18.48	19.14
5487	NASDAQ	CHK	Wed, Dec 17, 2014	17.61	19.08	17.49	18.68
5486	NASDAQ	CHK	Tue, Dec 16, 2014	17.01	18.31	16.90	17.45
5485	NASDAQ	CHK	Mon, Dec 15, 2014	17.45	17.82	17.10	17.22
5484	NASDAQ	CHK	Fri, Dec 12, 2014	16.54	17.68	16.41	17.24
5483	NASDAQ	CHK	Thu, Dec 11, 2014	17.26	17.62	16.63	16.71
5482	NASDAQ	CHK	Wed, Dec 10, 2014	17.96	17.97	16.90	17.14
5481	NASDAQ	CHK	Tue, Dec 9, 2014	18.02	18.52	17.89	18.35
5480	NASDAQ	CHK	Mon, Dec 8, 2014	18.98	18.98	18.00	18.02
5479	NASDAQ	CHK	Fri, Dec 5, 2014	19.34	19.67	19.14	19.29
5478	NASDAQ	CHK	Thu, Dec 4, 2014	19.63	19.88	19.28	19.50
5477	NASDAQ	CHK	Wed, Dec 3, 2014	19.96	20.28	19.67	19.90
5476	NASDAQ	CHK	Tue, Dec 2, 2014	19.80	20.29	19.49	19.85
5475	NASDAQ	CHK	Mon, Dec 1, 2014	19.99	20.30	19.49	20.07
5474	NASDAQ	CHK	Fri, Nov 28, 2014	21.76	21.78	20.24	20.26
5473	NASDAQ	CHK	Wed, Nov 26, 2014	23.52	23.55	22.90	23.04
5472	NASDAQ	CHK	Tue, Nov 25, 2014	24.10	24.30	23.40	23.70
5471	NASDAQ	CHK	Mon, Nov 24, 2014	23.92	24.22	23.73	24.06
5470	NASDAQ	CHK	Fri, Nov 21, 2014	24.40	24.43	23.82	24.16
5469	NASDAQ	CHK	Thu, Nov 20, 2014	23.02	24.13	23.02	23.95
5468	NASDAQ	CHK	Wed, Nov 19, 2014	23.34	23.43	22.86	23.05
5467	NASDAQ	CHK	Tue, Nov 18, 2014	23.43	23.48	22.73	23.06
5466	NASDAQ	CHK	Mon, Nov 17, 2014	23.46	23.72	22.81	23.38
5465	NASDAQ	CHK	Fri, Nov 14, 2014	22.83	23.30	22.45	23.21
5464	NASDAQ	CHK	Thu, Nov 13, 2014	23.17	23.17	22.60	22.75
5463	NASDAQ	CHK	Wed, Nov 12, 2014	23.14	23.59	22.96	23.41
5462	NASDAQ	CHK	Tue, Nov 11, 2014	22.90	23.72	22.77	23.43
5461	NASDAQ	CHK	Mon, Nov 10, 2014	23.81	24.22	22.62	22.90
5460	NASDAQ	CHK	Fri, Nov 7, 2014	22.73	24.11	22.73	23.41
5459	NASDAQ	CHK	Thu, Nov 6, 2014	22.41	22.86	21.71	22.76
5458	NASDAQ	CHK	Wed, Nov 5, 2014	22.42	23.15	22.05	22.76
5457	NASDAQ	CHK	Tue, Nov 4, 2014	21.46	21.62	20.95	21.29
5456	NASDAQ	CHK	Mon, Nov 3, 2014	22.44	22.84	21.75	21.79
5455	NASDAQ	CHK	Fri, Oct 31, 2014	21.57	22.22	21.22	22.18
5454	NASDAQ	CHK	Thu, Oct 30, 2014	21.50	21.64	20.97	21.35
5453	NASDAQ	CHK	Wed, Oct 29, 2014	21.80	22.19	21.32	21.59
5452	NASDAQ	CHK	Tue, Oct 28, 2014	20.94	21.65	20.75	21.60
5451	NASDAQ	CHK	Mon, Oct 27, 2014	21.02	21.09	20.35	20.79
5450	NASDAQ	CHK	Fri, Oct 24, 2014	21.63	21.74	21.26	21.60
5449	NASDAQ	CHK	Thu, Oct 23, 2014	21.88	22.28	21.74	21.79
5448	NASDAQ	CHK	Wed, Oct 22, 2014	22.08	22.58	21.55	21.57
5447	NASDAQ	CHK	Tue, Oct 21, 2014	20.78	21.73	20.73	21.66
5446	NASDAQ	CHK	Mon, Oct 20, 2014	20.16	20.75	20.05	20.64
5445	NASDAQ	CHK	Fri, Oct 17, 2014	20.99	21.21	19.99	20.16
5444	NASDAQ	CHK	Thu, Oct 16, 2014	19.55	21.00	19.19	20.79
5443	NASDAQ	CHK	Wed, Oct 15, 2014	16.96	17.90	16.69	17.77
5442	NASDAQ	CHK	Tue, Oct 14, 2014	18.03	18.32	17.39	17.49
5441	NASDAQ	CHK	Mon, Oct 13, 2014	18.90	19.22	17.80	17.83
5440	NASDAQ	CHK	Fri, Oct 10, 2014	19.03	19.62	18.42	18.97
5439	NASDAQ	CHK	Thu, Oct 9, 2014	20.42	20.49	19.13	19.18
5438	NASDAQ	CHK	Wed, Oct 8, 2014	20.82	20.89	20.12	20.63
5437	NASDAQ	CHK	Tue, Oct 7, 2014	21.21	21.42	20.88	20.93
5436	NASDAQ	CHK	Mon, Oct 6, 2014	21.69	21.88	21.27	21.33
5435	NASDAQ	CHK	Fri, Oct 3, 2014	22.29	22.30	21.48	21.75
5434	NASDAQ	CHK	Thu, Oct 2, 2014	22.27	22.36	21.43	22.23
5433	NASDAQ	CHK	Wed, Oct 1, 2014	23.02	23.21	22.30	22.43
5432	NASDAQ	CHK	Tue, Sep 30, 2014	23.60	23.65	22.77	22.99
5431	NASDAQ	CHK	Mon, Sep 29, 2014	23.16	23.73	22.96	23.64
5430	NASDAQ	CHK	Fri, Sep 26, 2014	23.27	23.65	23.06	23.50
5429	NASDAQ	CHK	Thu, Sep 25, 2014	23.93	24.00	23.21	23.34
5428	NASDAQ	CHK	Wed, Sep 24, 2014	24.23	24.25	23.64	23.93
5427	NASDAQ	CHK	Tue, Sep 23, 2014	24.26	24.52	24.19	24.26
5426	NASDAQ	CHK	Mon, Sep 22, 2014	24.67	24.70	24.21	24.31
5425	NASDAQ	CHK	Fri, Sep 19, 2014	24.84	25.00	24.62	24.67
5424	NASDAQ	CHK	Thu, Sep 18, 2014	25.39	25.42	24.62	24.77
5423	NASDAQ	CHK	Wed, Sep 17, 2014	25.31	25.64	25.27	25.35
5422	NASDAQ	CHK	Tue, Sep 16, 2014	25.02	25.46	24.94	25.36
5421	NASDAQ	CHK	Mon, Sep 15, 2014	24.91	25.22	24.71	25.05
5420	NASDAQ	CHK	Fri, Sep 12, 2014	25.28	25.30	24.82	24.91
5419	NASDAQ	CHK	Thu, Sep 11, 2014	25.25	25.37	24.78	25.35
5418	NASDAQ	CHK	Wed, Sep 10, 2014	25.52	25.59	24.92	25.53
5417	NASDAQ	CHK	Tue, Sep 9, 2014	25.73	26.17	25.38	25.59
5416	NASDAQ	CHK	Mon, Sep 8, 2014	26.07	26.07	25.32	25.58
5415	NASDAQ	CHK	Fri, Sep 5, 2014	26.00	26.18	25.86	26.17
5414	NASDAQ	CHK	Thu, Sep 4, 2014	26.58	26.81	25.94	26.03
5413	NASDAQ	CHK	Wed, Sep 3, 2014	26.91	27.08	26.44	26.49
5412	NASDAQ	CHK	Tue, Sep 2, 2014	27.10	27.15	26.71	26.80
5411	NASDAQ	CHK	Fri, Aug 29, 2014	27.02	27.24	26.71	27.20
5410	NASDAQ	CHK	Thu, Aug 28, 2014	26.43	27.14	26.29	26.98
5409	NASDAQ	CHK	Wed, Aug 27, 2014	26.41	26.72	26.36	26.43
5408	NASDAQ	CHK	Tue, Aug 26, 2014	26.76	26.91	26.41	26.46
5407	NASDAQ	CHK	Mon, Aug 25, 2014	26.25	26.80	26.16	26.74
5406	NASDAQ	CHK	Fri, Aug 22, 2014	26.31	26.45	26.00	26.02
5405	NASDAQ	CHK	Thu, Aug 21, 2014	26.28	26.51	25.92	26.46
5404	NASDAQ	CHK	Wed, Aug 20, 2014	25.90	26.37	25.80	26.33
5403	NASDAQ	CHK	Tue, Aug 19, 2014	25.60	26.16	25.58	26.15
5402	NASDAQ	CHK	Mon, Aug 18, 2014	25.72	25.74	25.38	25.46
5401	NASDAQ	CHK	Fri, Aug 15, 2014	25.64	25.84	25.49	25.55
5400	NASDAQ	CHK	Thu, Aug 14, 2014	25.87	25.98	25.41	25.65
5399	NASDAQ	CHK	Wed, Aug 13, 2014	25.86	26.09	25.67	25.75
5398	NASDAQ	CHK	Tue, Aug 12, 2014	26.40	26.40	25.67	25.86
5397	NASDAQ	CHK	Mon, Aug 11, 2014	26.82	26.82	26.37	26.41
5396	NASDAQ	CHK	Fri, Aug 8, 2014	26.02	26.67	25.75	26.59
5395	NASDAQ	CHK	Thu, Aug 7, 2014	26.53	26.66	25.75	25.93
5394	NASDAQ	CHK	Wed, Aug 6, 2014	25.54	26.41	25.49	26.19
5393	NASDAQ	CHK	Tue, Aug 5, 2014	26.59	26.68	25.83	26.06
5392	NASDAQ	CHK	Mon, Aug 4, 2014	26.19	26.90	25.96	26.83
5391	NASDAQ	CHK	Fri, Aug 1, 2014	26.35	26.42	25.90	26.07
5390	NASDAQ	CHK	Thu, Jul 31, 2014	26.86	26.91	26.37	26.37
5389	NASDAQ	CHK	Wed, Jul 30, 2014	26.96	27.18	26.74	27.01
5388	NASDAQ	CHK	Tue, Jul 29, 2014	26.57	27.27	26.35	27.06
5387	NASDAQ	CHK	Mon, Jul 28, 2014	27.06	27.24	26.70	26.84
5386	NASDAQ	CHK	Fri, Jul 25, 2014	27.15	27.27	26.89	27.01
5385	NASDAQ	CHK	Thu, Jul 24, 2014	27.09	27.58	26.87	27.30
5384	NASDAQ	CHK	Wed, Jul 23, 2014	26.94	27.10	26.63	27.08
5383	NASDAQ	CHK	Tue, Jul 22, 2014	26.72	27.00	26.61	26.85
5382	NASDAQ	CHK	Mon, Jul 21, 2014	26.99	26.99	26.54	26.76
5381	NASDAQ	CHK	Fri, Jul 18, 2014	26.96	27.18	26.84	27.00
5380	NASDAQ	CHK	Thu, Jul 17, 2014	27.69	27.97	26.78	26.82
5379	NASDAQ	CHK	Wed, Jul 16, 2014	27.68	27.96	27.54	27.84
5378	NASDAQ	CHK	Tue, Jul 15, 2014	28.19	28.36	27.22	27.46
5377	NASDAQ	CHK	Mon, Jul 14, 2014	28.26	28.57	28.19	28.26
5376	NASDAQ	CHK	Fri, Jul 11, 2014	28.99	29.09	28.14	28.18
5375	NASDAQ	CHK	Thu, Jul 10, 2014	29.08	29.25	28.70	29.02
5374	NASDAQ	CHK	Wed, Jul 9, 2014	28.57	29.33	28.53	29.31
5373	NASDAQ	CHK	Tue, Jul 8, 2014	28.02	28.65	27.61	28.61
5372	NASDAQ	CHK	Mon, Jul 7, 2014	29.36	29.40	27.96	28.14
5371	NASDAQ	CHK	Thu, Jul 3, 2014	29.28	29.53	29.11	29.50
5370	NASDAQ	CHK	Wed, Jul 2, 2014	29.31	29.44	29.05	29.25
5369	NASDAQ	CHK	Tue, Jul 1, 2014	29.70	29.92	28.93	29.24
5368	NASDAQ	CHK	Mon, Jun 30, 2014	30.43	31.10	30.37	31.08
5367	NASDAQ	CHK	Fri, Jun 27, 2014	30.32	30.58	30.20	30.40
5366	NASDAQ	CHK	Thu, Jun 26, 2014	31.05	31.06	30.45	30.52
5365	NASDAQ	CHK	Wed, Jun 25, 2014	30.46	31.03	30.42	31.02
5364	NASDAQ	CHK	Tue, Jun 24, 2014	31.29	31.49	30.22	30.27
5363	NASDAQ	CHK	Mon, Jun 23, 2014	30.90	31.43	30.77	31.30
5362	NASDAQ	CHK	Fri, Jun 20, 2014	30.83	31.21	30.69	30.89
5361	NASDAQ	CHK	Thu, Jun 19, 2014	30.67	30.84	30.47	30.72
5360	NASDAQ	CHK	Wed, Jun 18, 2014	30.53	30.76	30.35	30.70
5359	NASDAQ	CHK	Tue, Jun 17, 2014	30.37	30.60	30.26	30.55
5358	NASDAQ	CHK	Mon, Jun 16, 2014	30.59	30.66	30.39	30.45
5357	NASDAQ	CHK	Fri, Jun 13, 2014	30.55	30.57	30.16	30.47
5356	NASDAQ	CHK	Thu, Jun 12, 2014	30.11	30.80	30.06	30.49
5355	NASDAQ	CHK	Wed, Jun 11, 2014	29.18	30.12	29.15	30.03
5354	NASDAQ	CHK	Tue, Jun 10, 2014	29.49	29.58	29.20	29.22
5353	NASDAQ	CHK	Mon, Jun 9, 2014	29.99	30.00	29.53	29.58
5352	NASDAQ	CHK	Fri, Jun 6, 2014	29.90	29.91	29.62	29.72
5351	NASDAQ	CHK	Thu, Jun 5, 2014	29.33	29.91	29.05	29.87
5350	NASDAQ	CHK	Wed, Jun 4, 2014	29.23	29.44	29.02	29.29
5349	NASDAQ	CHK	Tue, Jun 3, 2014	29.34	29.48	29.17	29.25
5348	NASDAQ	CHK	Mon, Jun 2, 2014	28.76	29.41	28.66	29.31
5347	NASDAQ	CHK	Fri, May 30, 2014	28.70	28.84	28.33	28.72
5346	NASDAQ	CHK	Thu, May 29, 2014	28.38	28.90	28.17	28.89
5345	NASDAQ	CHK	Wed, May 28, 2014	28.35	28.47	28.06	28.41
5344	NASDAQ	CHK	Tue, May 27, 2014	27.79	28.35	27.70	28.32
5343	NASDAQ	CHK	Fri, May 23, 2014	28.00	28.09	27.61	27.68
5342	NASDAQ	CHK	Thu, May 22, 2014	28.18	28.30	27.88	27.95
5341	NASDAQ	CHK	Wed, May 21, 2014	28.19	28.40	28.10	28.17
5340	NASDAQ	CHK	Tue, May 20, 2014	28.00	28.63	27.92	28.02
5339	NASDAQ	CHK	Mon, May 19, 2014	27.96	28.08	27.55	27.96
5338	NASDAQ	CHK	Fri, May 16, 2014	28.35	28.37	27.30	27.64
5337	NASDAQ	CHK	Thu, May 15, 2014	29.22	29.25	28.22	28.99
5336	NASDAQ	CHK	Wed, May 14, 2014	30.12	30.12	29.16	29.23
5335	NASDAQ	CHK	Tue, May 13, 2014	30.34	30.48	29.93	30.04
5334	NASDAQ	CHK	Mon, May 12, 2014	29.88	30.36	29.73	30.33
5333	NASDAQ	CHK	Fri, May 9, 2014	29.07	29.86	29.01	29.81
5332	NASDAQ	CHK	Thu, May 8, 2014	29.46	29.90	29.05	29.14
5331	NASDAQ	CHK	Wed, May 7, 2014	29.50	29.84	28.10	29.61
5330	NASDAQ	CHK	Tue, May 6, 2014	28.36	28.67	28.24	28.35
5329	NASDAQ	CHK	Mon, May 5, 2014	28.06	28.44	28.05	28.31
5328	NASDAQ	CHK	Fri, May 2, 2014	28.42	28.72	28.13	28.28
5327	NASDAQ	CHK	Thu, May 1, 2014	28.81	28.98	28.39	28.42
5326	NASDAQ	CHK	Wed, Apr 30, 2014	28.93	28.96	28.57	28.75
5325	NASDAQ	CHK	Tue, Apr 29, 2014	28.94	29.43	28.90	29.08
5324	NASDAQ	CHK	Mon, Apr 28, 2014	29.03	29.04	28.41	28.76
5323	NASDAQ	CHK	Fri, Apr 25, 2014	29.14	29.20	28.71	28.80
5322	NASDAQ	CHK	Thu, Apr 24, 2014	29.10	29.48	28.88	29.22
5321	NASDAQ	CHK	Wed, Apr 23, 2014	28.46	29.25	28.38	29.02
5320	NASDAQ	CHK	Tue, Apr 22, 2014	28.50	28.72	28.10	28.46
5319	NASDAQ	CHK	Mon, Apr 21, 2014	28.05	28.59	28.03	28.52
5318	NASDAQ	CHK	Thu, Apr 17, 2014	27.50	28.37	27.34	28.17
5317	NASDAQ	CHK	Wed, Apr 16, 2014	27.35	27.50	27.10	27.49
5316	NASDAQ	CHK	Tue, Apr 15, 2014	26.64	27.31	26.59	27.17
5315	NASDAQ	CHK	Mon, Apr 14, 2014	26.37	26.89	26.24	26.72
5314	NASDAQ	CHK	Fri, Apr 11, 2014	26.29	26.43	26.05	26.16
5313	NASDAQ	CHK	Thu, Apr 10, 2014	26.24	26.84	25.95	26.45
5312	NASDAQ	CHK	Wed, Apr 9, 2014	26.14	26.38	25.93	26.37
5311	NASDAQ	CHK	Tue, Apr 8, 2014	26.01	26.36	25.97	26.13
5310	NASDAQ	CHK	Mon, Apr 7, 2014	26.57	26.57	25.76	25.97
5309	NASDAQ	CHK	Fri, Apr 4, 2014	26.72	26.95	26.32	26.59
5308	NASDAQ	CHK	Thu, Apr 3, 2014	26.42	26.96	26.42	26.62
5307	NASDAQ	CHK	Wed, Apr 2, 2014	26.15	26.75	26.09	26.45
5306	NASDAQ	CHK	Tue, Apr 1, 2014	25.71	26.16	25.66	26.13
5305	NASDAQ	CHK	Mon, Mar 31, 2014	25.72	25.72	25.13	25.62
5304	NASDAQ	CHK	Fri, Mar 28, 2014	25.91	25.98	25.45	25.67
5303	NASDAQ	CHK	Thu, Mar 27, 2014	24.85	25.84	24.80	25.81
5302	NASDAQ	CHK	Wed, Mar 26, 2014	25.29	25.45	24.81	24.82
5301	NASDAQ	CHK	Tue, Mar 25, 2014	24.87	25.26	24.82	25.23
5300	NASDAQ	CHK	Mon, Mar 24, 2014	24.74	25.08	24.64	24.71
5299	NASDAQ	CHK	Fri, Mar 21, 2014	24.83	25.00	24.59	24.67
5298	NASDAQ	CHK	Thu, Mar 20, 2014	24.55	24.71	24.24	24.69
5297	NASDAQ	CHK	Wed, Mar 19, 2014	25.01	25.08	24.60	24.67
5296	NASDAQ	CHK	Tue, Mar 18, 2014	24.74	25.00	24.64	24.95
5295	NASDAQ	CHK	Mon, Mar 17, 2014	25.26	25.45	24.62	24.69
5294	NASDAQ	CHK	Fri, Mar 14, 2014	25.15	25.31	24.95	25.03
5293	NASDAQ	CHK	Thu, Mar 13, 2014	25.11	25.46	24.96	25.21
5292	NASDAQ	CHK	Wed, Mar 12, 2014	25.08	25.25	24.91	25.14
5291	NASDAQ	CHK	Tue, Mar 11, 2014	25.68	25.73	25.14	25.26
5290	NASDAQ	CHK	Mon, Mar 10, 2014	25.80	25.83	25.52	25.63
5289	NASDAQ	CHK	Fri, Mar 7, 2014	25.65	25.88	25.52	25.85
5288	NASDAQ	CHK	Thu, Mar 6, 2014	25.49	25.63	25.33	25.52
5287	NASDAQ	CHK	Wed, Mar 5, 2014	25.72	25.88	25.38	25.50
5286	NASDAQ	CHK	Tue, Mar 4, 2014	25.83	25.85	25.36	25.67
5285	NASDAQ	CHK	Mon, Mar 3, 2014	25.71	26.23	25.51	25.60
5284	NASDAQ	CHK	Fri, Feb 28, 2014	25.84	26.29	25.76	25.91
5283	NASDAQ	CHK	Thu, Feb 27, 2014	25.58	25.99	25.37	25.90
5282	NASDAQ	CHK	Wed, Feb 26, 2014	26.10	26.10	24.75	25.61
5281	NASDAQ	CHK	Tue, Feb 25, 2014	27.20	27.24	26.72	26.94
5280	NASDAQ	CHK	Mon, Feb 24, 2014	26.78	27.46	26.78	27.29
5279	NASDAQ	CHK	Fri, Feb 21, 2014	26.75	26.93	26.48	26.57
5278	NASDAQ	CHK	Thu, Feb 20, 2014	26.37	26.78	26.30	26.65
5277	NASDAQ	CHK	Wed, Feb 19, 2014	25.85	26.69	25.80	26.40
5276	NASDAQ	CHK	Tue, Feb 18, 2014	25.28	26.04	25.18	25.83
5275	NASDAQ	CHK	Fri, Feb 14, 2014	25.02	25.32	24.87	25.14
5274	NASDAQ	CHK	Thu, Feb 13, 2014	24.65	25.11	24.47	24.95
5273	NASDAQ	CHK	Wed, Feb 12, 2014	24.94	25.10	24.68	24.75
5272	NASDAQ	CHK	Tue, Feb 11, 2014	24.72	25.18	24.65	24.82
5271	NASDAQ	CHK	Mon, Feb 10, 2014	24.51	25.07	24.07	24.68
5270	NASDAQ	CHK	Fri, Feb 7, 2014	24.39	24.59	23.92	24.59
5269	NASDAQ	CHK	Thu, Feb 6, 2014	25.58	25.58	24.05	24.41
5268	NASDAQ	CHK	Wed, Feb 5, 2014	26.65	26.68	25.84	26.21
5267	NASDAQ	CHK	Tue, Feb 4, 2014	26.36	27.09	26.33	26.54
5266	NASDAQ	CHK	Mon, Feb 3, 2014	26.85	27.00	25.83	25.99
5265	NASDAQ	CHK	Fri, Jan 31, 2014	26.80	27.31	26.54	26.91
5264	NASDAQ	CHK	Thu, Jan 30, 2014	27.18	27.38	26.88	26.98
5263	NASDAQ	CHK	Wed, Jan 29, 2014	26.62	27.55	26.35	27.17
5262	NASDAQ	CHK	Tue, Jan 28, 2014	26.15	26.85	26.11	26.76
5261	NASDAQ	CHK	Mon, Jan 27, 2014	26.84	26.84	25.75	26.01
5260	NASDAQ	CHK	Fri, Jan 24, 2014	26.65	27.04	26.38	26.88
5259	NASDAQ	CHK	Thu, Jan 23, 2014	27.11	27.30	26.70	26.90
5258	NASDAQ	CHK	Wed, Jan 22, 2014	26.84	27.22	26.81	27.13
5257	NASDAQ	CHK	Tue, Jan 21, 2014	25.90	26.49	25.85	26.45
5256	NASDAQ	CHK	Fri, Jan 17, 2014	25.94	25.99	25.41	25.45
5255	NASDAQ	CHK	Thu, Jan 16, 2014	25.54	26.05	25.54	25.94
5254	NASDAQ	CHK	Wed, Jan 15, 2014	25.68	25.79	25.37	25.46
5253	NASDAQ	CHK	Tue, Jan 14, 2014	25.28	25.70	25.26	25.63
5252	NASDAQ	CHK	Mon, Jan 13, 2014	25.61	25.97	25.04	25.15
5251	NASDAQ	CHK	Fri, Jan 10, 2014	25.65	25.78	25.41	25.71
5250	NASDAQ	CHK	Thu, Jan 9, 2014	25.90	26.13	25.46	25.61
5249	NASDAQ	CHK	Wed, Jan 8, 2014	26.19	26.19	25.62	25.85
5248	NASDAQ	CHK	Tue, Jan 7, 2014	25.92	26.54	25.86	26.31
5247	NASDAQ	CHK	Mon, Jan 6, 2014	26.51	26.53	25.97	26.20
5246	NASDAQ	CHK	Fri, Jan 3, 2014	26.65	26.72	26.12	26.42
5245	NASDAQ	CHK	Thu, Jan 2, 2014	27.07	27.22	26.45	26.62
5244	NASDAQ	CHK	Tue, Dec 31, 2013	27.08	27.26	26.80	27.14
5243	NASDAQ	CHK	Mon, Dec 30, 2013	27.55	27.82	27.01	27.05
5242	NASDAQ	CHK	Fri, Dec 27, 2013	27.71	27.73	27.41	27.49
5241	NASDAQ	CHK	Thu, Dec 26, 2013	27.58	27.72	27.20	27.72
5240	NASDAQ	CHK	Tue, Dec 24, 2013	27.34	27.69	27.23	27.61
5239	NASDAQ	CHK	Mon, Dec 23, 2013	27.28	27.70	27.25	27.43
5238	NASDAQ	CHK	Fri, Dec 20, 2013	27.29	27.39	27.08	27.11
5237	NASDAQ	CHK	Thu, Dec 19, 2013	26.57	27.32	26.55	27.21
5236	NASDAQ	CHK	Wed, Dec 18, 2013	26.66	26.73	26.22	26.64
5235	NASDAQ	CHK	Tue, Dec 17, 2013	26.75	27.01	26.29	26.36
5234	NASDAQ	CHK	Mon, Dec 16, 2013	27.01	27.19	26.68	26.77
5233	NASDAQ	CHK	Fri, Dec 13, 2013	26.65	27.05	26.46	27.00
5232	NASDAQ	CHK	Thu, Dec 12, 2013	26.52	26.87	26.49	26.73
5231	NASDAQ	CHK	Wed, Dec 11, 2013	26.81	26.85	26.35	26.44
5230	NASDAQ	CHK	Tue, Dec 10, 2013	26.41	27.10	26.41	26.81
5229	NASDAQ	CHK	Mon, Dec 9, 2013	26.54	26.60	26.27	26.38
5228	NASDAQ	CHK	Fri, Dec 6, 2013	27.23	27.34	26.29	26.48
5227	NASDAQ	CHK	Thu, Dec 5, 2013	27.07	27.17	26.87	27.05
5226	NASDAQ	CHK	Wed, Dec 4, 2013	27.00	27.26	26.92	27.10
5225	NASDAQ	CHK	Tue, Dec 3, 2013	26.63	27.06	26.48	27.01
5224	NASDAQ	CHK	Mon, Dec 2, 2013	26.99	27.22	26.68	26.78
5223	NASDAQ	CHK	Fri, Nov 29, 2013	26.63	27.02	26.37	26.87
5222	NASDAQ	CHK	Wed, Nov 27, 2013	26.20	26.76	26.02	26.65
5221	NASDAQ	CHK	Tue, Nov 26, 2013	26.18	26.48	26.05	26.31
5220	NASDAQ	CHK	Mon, Nov 25, 2013	26.33	26.45	25.78	26.27
5219	NASDAQ	CHK	Fri, Nov 22, 2013	26.32	26.61	25.91	26.30
5218	NASDAQ	CHK	Thu, Nov 21, 2013	25.70	26.55	25.68	26.33
5217	NASDAQ	CHK	Wed, Nov 20, 2013	25.50	25.85	25.46	25.55
5216	NASDAQ	CHK	Tue, Nov 19, 2013	25.38	25.53	25.06	25.30
5215	NASDAQ	CHK	Mon, Nov 18, 2013	25.94	26.02	25.31	25.42
5214	NASDAQ	CHK	Fri, Nov 15, 2013	26.07	26.18	25.70	25.88
5213	NASDAQ	CHK	Thu, Nov 14, 2013	25.92	26.14	25.70	25.95
5212	NASDAQ	CHK	Wed, Nov 13, 2013	25.46	25.93	25.35	25.92
5211	NASDAQ	CHK	Tue, Nov 12, 2013	25.76	25.87	25.44	25.55
5210	NASDAQ	CHK	Mon, Nov 11, 2013	25.76	25.81	25.52	25.69
5209	NASDAQ	CHK	Fri, Nov 8, 2013	25.49	26.08	25.49	25.71
5208	NASDAQ	CHK	Thu, Nov 7, 2013	26.27	26.38	25.19	25.40
5207	NASDAQ	CHK	Wed, Nov 6, 2013	28.50	28.55	26.05	26.23
5206	NASDAQ	CHK	Tue, Nov 5, 2013	28.76	28.83	28.13	28.14
5205	NASDAQ	CHK	Mon, Nov 4, 2013	28.00	29.06	27.95	28.84
5204	NASDAQ	CHK	Fri, Nov 1, 2013	27.90	28.10	27.55	28.00
5203	NASDAQ	CHK	Thu, Oct 31, 2013	28.19	28.27	27.67	27.96
5202	NASDAQ	CHK	Wed, Oct 30, 2013	28.36	28.65	27.77	28.15
5201	NASDAQ	CHK	Tue, Oct 29, 2013	28.25	28.50	28.20	28.32
5200	NASDAQ	CHK	Mon, Oct 28, 2013	28.26	28.47	28.11	28.16
5199	NASDAQ	CHK	Fri, Oct 25, 2013	28.40	28.69	28.15	28.47
5198	NASDAQ	CHK	Thu, Oct 24, 2013	27.65	28.68	27.32	28.37
5197	NASDAQ	CHK	Wed, Oct 23, 2013	28.01	28.04	27.21	27.29
5196	NASDAQ	CHK	Tue, Oct 22, 2013	27.93	28.30	27.73	28.19
5195	NASDAQ	CHK	Mon, Oct 21, 2013	28.30	28.71	27.94	28.05
5194	NASDAQ	CHK	Fri, Oct 18, 2013	28.51	28.61	28.05	28.25
5193	NASDAQ	CHK	Thu, Oct 17, 2013	27.43	27.78	27.25	27.63
5192	NASDAQ	CHK	Wed, Oct 16, 2013	26.76	27.61	26.68	27.53
5191	NASDAQ	CHK	Tue, Oct 15, 2013	26.43	27.05	26.29	26.50
5190	NASDAQ	CHK	Mon, Oct 14, 2013	26.25	26.57	26.15	26.45
5189	NASDAQ	CHK	Fri, Oct 11, 2013	26.13	26.73	25.99	26.47
5188	NASDAQ	CHK	Thu, Oct 10, 2013	26.25	26.50	26.15	26.41
5187	NASDAQ	CHK	Wed, Oct 9, 2013	25.93	26.25	25.65	25.99
5186	NASDAQ	CHK	Tue, Oct 8, 2013	26.30	26.53	26.03	26.05
5185	NASDAQ	CHK	Mon, Oct 7, 2013	26.16	26.57	26.11	26.27
5184	NASDAQ	CHK	Fri, Oct 4, 2013	26.26	26.67	26.07	26.50
5183	NASDAQ	CHK	Thu, Oct 3, 2013	26.09	26.27	25.86	26.18
5182	NASDAQ	CHK	Wed, Oct 2, 2013	26.13	26.32	25.83	26.17
5181	NASDAQ	CHK	Tue, Oct 1, 2013	25.83	26.58	25.83	26.24
5180	NASDAQ	CHK	Mon, Sep 30, 2013	25.92	26.00	25.63	25.88
5179	NASDAQ	CHK	Fri, Sep 27, 2013	26.23	26.41	26.07	26.21
5178	NASDAQ	CHK	Thu, Sep 26, 2013	26.60	26.64	26.07	26.41
5177	NASDAQ	CHK	Wed, Sep 25, 2013	26.40	26.68	26.34	26.50
5176	NASDAQ	CHK	Tue, Sep 24, 2013	26.41	26.66	26.16	26.38
5175	NASDAQ	CHK	Mon, Sep 23, 2013	26.52	26.64	26.30	26.38
5174	NASDAQ	CHK	Fri, Sep 20, 2013	26.97	27.10	26.53	26.58
5173	NASDAQ	CHK	Thu, Sep 19, 2013	27.28	27.46	26.84	26.90
5172	NASDAQ	CHK	Wed, Sep 18, 2013	27.15	27.45	26.88	27.30
5171	NASDAQ	CHK	Tue, Sep 17, 2013	26.61	27.27	26.58	27.16
5170	NASDAQ	CHK	Mon, Sep 16, 2013	26.86	26.94	26.47	26.52
5169	NASDAQ	CHK	Fri, Sep 13, 2013	26.91	27.07	26.57	26.67
5168	NASDAQ	CHK	Thu, Sep 12, 2013	26.93	27.06	26.57	26.92
5167	NASDAQ	CHK	Wed, Sep 11, 2013	26.40	27.29	26.37	26.89
5166	NASDAQ	CHK	Tue, Sep 10, 2013	26.48	26.53	26.04	26.34
5165	NASDAQ	CHK	Mon, Sep 9, 2013	26.10	26.50	26.10	26.40
5164	NASDAQ	CHK	Fri, Sep 6, 2013	26.21	26.38	25.93	26.03
5163	NASDAQ	CHK	Thu, Sep 5, 2013	26.18	26.24	26.02	26.17
5162	NASDAQ	CHK	Wed, Sep 4, 2013	26.09	26.18	26.00	26.12
5161	NASDAQ	CHK	Tue, Sep 3, 2013	26.07	26.41	26.02	26.16
5160	NASDAQ	CHK	Fri, Aug 30, 2013	25.97	26.01	25.74	25.81
5159	NASDAQ	CHK	Thu, Aug 29, 2013	26.34	26.34	25.76	25.95
5158	NASDAQ	CHK	Wed, Aug 28, 2013	26.02	26.46	25.96	26.34
5157	NASDAQ	CHK	Tue, Aug 27, 2013	26.11	26.36	25.94	26.02
5156	NASDAQ	CHK	Mon, Aug 26, 2013	26.32	26.63	26.25	26.35
5155	NASDAQ	CHK	Fri, Aug 23, 2013	25.59	26.26	25.39	26.23
5154	NASDAQ	CHK	Thu, Aug 22, 2013	25.33	25.67	25.14	25.51
5153	NASDAQ	CHK	Wed, Aug 21, 2013	24.65	25.50	24.65	25.25
5152	NASDAQ	CHK	Tue, Aug 20, 2013	24.77	25.50	24.76	25.26
5151	NASDAQ	CHK	Mon, Aug 19, 2013	25.58	25.58	24.74	24.77
5150	NASDAQ	CHK	Fri, Aug 16, 2013	24.94	25.30	24.87	25.00
5149	NASDAQ	CHK	Thu, Aug 15, 2013	24.69	25.08	24.53	24.99
5148	NASDAQ	CHK	Wed, Aug 14, 2013	25.00	25.09	24.89	24.91
5147	NASDAQ	CHK	Tue, Aug 13, 2013	25.05	25.23	24.94	25.03
5146	NASDAQ	CHK	Mon, Aug 12, 2013	24.89	25.27	24.88	25.02
5145	NASDAQ	CHK	Fri, Aug 9, 2013	25.03	25.20	24.85	25.00
5144	NASDAQ	CHK	Thu, Aug 8, 2013	25.02	25.19	24.65	25.01
5143	NASDAQ	CHK	Wed, Aug 7, 2013	24.85	24.90	24.39	24.85
5142	NASDAQ	CHK	Tue, Aug 6, 2013	25.48	25.59	24.86	25.15
5141	NASDAQ	CHK	Mon, Aug 5, 2013	24.93	25.64	24.79	25.48
5140	NASDAQ	CHK	Fri, Aug 2, 2013	24.86	25.30	24.75	24.95
5139	NASDAQ	CHK	Thu, Aug 1, 2013	24.06	25.20	24.02	24.95
5138	NASDAQ	CHK	Wed, Jul 31, 2013	23.16	23.54	23.10	23.30
5137	NASDAQ	CHK	Tue, Jul 30, 2013	22.76	23.06	22.63	23.05
5136	NASDAQ	CHK	Mon, Jul 29, 2013	22.73	22.83	22.61	22.75
5135	NASDAQ	CHK	Fri, Jul 26, 2013	22.44	22.86	22.34	22.85
5134	NASDAQ	CHK	Thu, Jul 25, 2013	22.20	22.64	22.13	22.59
5133	NASDAQ	CHK	Wed, Jul 24, 2013	22.38	22.54	22.09	22.20
5132	NASDAQ	CHK	Tue, Jul 23, 2013	22.41	22.64	22.30	22.32
5131	NASDAQ	CHK	Mon, Jul 22, 2013	22.55	22.57	22.21	22.40
5130	NASDAQ	CHK	Fri, Jul 19, 2013	22.42	22.59	22.10	22.58
5129	NASDAQ	CHK	Thu, Jul 18, 2013	21.86	22.48	21.86	22.33
5128	NASDAQ	CHK	Wed, Jul 17, 2013	21.80	21.94	21.68	21.75
5127	NASDAQ	CHK	Tue, Jul 16, 2013	21.57	21.91	21.57	21.75
5126	NASDAQ	CHK	Mon, Jul 15, 2013	21.33	21.77	21.19	21.68
5125	NASDAQ	CHK	Fri, Jul 12, 2013	21.30	21.49	21.11	21.24
5124	NASDAQ	CHK	Thu, Jul 11, 2013	21.61	21.65	21.07	21.29
5123	NASDAQ	CHK	Wed, Jul 10, 2013	21.15	21.70	21.15	21.40
5122	NASDAQ	CHK	Tue, Jul 9, 2013	20.96	21.20	20.89	21.14
5121	NASDAQ	CHK	Mon, Jul 8, 2013	21.16	21.24	20.90	20.93
5120	NASDAQ	CHK	Fri, Jul 5, 2013	21.11	21.24	20.86	21.04
5119	NASDAQ	CHK	Wed, Jul 3, 2013	20.91	21.17	20.84	21.01
5118	NASDAQ	CHK	Tue, Jul 2, 2013	20.98	21.26	20.90	21.13
5117	NASDAQ	CHK	Mon, Jul 1, 2013	20.46	20.85	20.30	20.77
5116	NASDAQ	CHK	Fri, Jun 28, 2013	20.48	20.57	20.14	20.38
5115	NASDAQ	CHK	Thu, Jun 27, 2013	20.46	20.90	20.46	20.58
5114	NASDAQ	CHK	Wed, Jun 26, 2013	20.08	20.67	20.08	20.37
5113	NASDAQ	CHK	Tue, Jun 25, 2013	19.81	19.92	19.61	19.79
5112	NASDAQ	CHK	Mon, Jun 24, 2013	19.83	19.91	19.32	19.60
5111	NASDAQ	CHK	Fri, Jun 21, 2013	20.23	20.32	19.80	20.22
5110	NASDAQ	CHK	Thu, Jun 20, 2013	20.53	20.53	19.85	20.08
5109	NASDAQ	CHK	Wed, Jun 19, 2013	21.24	21.44	20.79	20.80
5108	NASDAQ	CHK	Tue, Jun 18, 2013	21.08	21.38	21.04	21.25
5107	NASDAQ	CHK	Mon, Jun 17, 2013	20.89	21.18	20.89	21.04
5106	NASDAQ	CHK	Fri, Jun 14, 2013	21.02	21.29	20.50	20.68
5105	NASDAQ	CHK	Thu, Jun 13, 2013	21.01	21.12	20.81	21.00
5104	NASDAQ	CHK	Wed, Jun 12, 2013	21.50	21.52	20.94	21.08
5103	NASDAQ	CHK	Tue, Jun 11, 2013	21.64	21.64	21.29	21.30
5102	NASDAQ	CHK	Mon, Jun 10, 2013	22.08	22.13	21.74	21.92
5101	NASDAQ	CHK	Fri, Jun 7, 2013	21.78	22.14	21.55	22.00
5100	NASDAQ	CHK	Thu, Jun 6, 2013	21.52	21.68	21.19	21.67
5099	NASDAQ	CHK	Wed, Jun 5, 2013	21.65	21.72	21.37	21.52
5098	NASDAQ	CHK	Tue, Jun 4, 2013	22.16	22.28	21.50	21.72
5097	NASDAQ	CHK	Mon, Jun 3, 2013	21.98	22.20	21.60	22.18
5096	NASDAQ	CHK	Fri, May 31, 2013	22.67	22.72	21.84	21.84
5095	NASDAQ	CHK	Thu, May 30, 2013	22.57	22.72	22.33	22.53
5094	NASDAQ	CHK	Wed, May 29, 2013	22.02	22.86	22.02	22.58
5093	NASDAQ	CHK	Tue, May 28, 2013	21.90	22.30	21.83	22.16
5092	NASDAQ	CHK	Fri, May 24, 2013	21.49	21.69	21.15	21.67
5091	NASDAQ	CHK	Thu, May 23, 2013	20.85	21.78	20.56	21.66
5090	NASDAQ	CHK	Wed, May 22, 2013	21.30	21.63	20.95	21.10
5089	NASDAQ	CHK	Tue, May 21, 2013	20.97	21.20	20.82	20.85
5088	NASDAQ	CHK	Mon, May 20, 2013	20.45	21.15	20.27	20.80
5087	NASDAQ	CHK	Fri, May 17, 2013	20.01	20.42	19.90	20.27
5086	NASDAQ	CHK	Thu, May 16, 2013	20.24	20.33	19.78	19.89
5085	NASDAQ	CHK	Wed, May 15, 2013	20.68	20.76	20.47	20.66
5084	NASDAQ	CHK	Tue, May 14, 2013	20.56	20.96	20.51	20.76
5083	NASDAQ	CHK	Mon, May 13, 2013	20.15	20.62	20.06	20.56
5082	NASDAQ	CHK	Fri, May 10, 2013	19.53	20.25	19.29	20.15
5081	NASDAQ	CHK	Thu, May 9, 2013	19.18	19.76	19.15	19.58
5080	NASDAQ	CHK	Wed, May 8, 2013	19.19	19.44	19.12	19.19
5079	NASDAQ	CHK	Tue, May 7, 2013	19.45	19.55	18.92	19.13
5078	NASDAQ	CHK	Mon, May 6, 2013	19.23	19.53	19.13	19.44
5077	NASDAQ	CHK	Fri, May 3, 2013	19.22	19.50	19.03	19.25
5076	NASDAQ	CHK	Thu, May 2, 2013	19.21	19.39	18.85	19.15
5075	NASDAQ	CHK	Wed, May 1, 2013	19.90	19.98	18.86	19.19
5074	NASDAQ	CHK	Tue, Apr 30, 2013	19.36	19.54	18.99	19.54
5073	NASDAQ	CHK	Mon, Apr 29, 2013	19.27	19.56	19.04	19.33
5072	NASDAQ	CHK	Fri, Apr 26, 2013	19.24	19.30	18.83	19.25
5071	NASDAQ	CHK	Thu, Apr 25, 2013	19.43	19.64	19.20	19.28
5070	NASDAQ	CHK	Wed, Apr 24, 2013	18.98	19.34	18.97	19.29
5069	NASDAQ	CHK	Tue, Apr 23, 2013	18.66	18.96	18.52	18.94
5068	NASDAQ	CHK	Mon, Apr 22, 2013	18.59	18.79	18.34	18.60
5067	NASDAQ	CHK	Fri, Apr 19, 2013	18.96	18.99	18.39	18.59
5066	NASDAQ	CHK	Thu, Apr 18, 2013	18.51	19.13	18.21	18.96
5065	NASDAQ	CHK	Wed, Apr 17, 2013	18.81	18.90	18.41	18.47
5064	NASDAQ	CHK	Tue, Apr 16, 2013	19.17	19.42	18.55	19.06
5063	NASDAQ	CHK	Mon, Apr 15, 2013	19.40	19.41	18.93	18.93
5062	NASDAQ	CHK	Fri, Apr 12, 2013	19.97	20.07	19.58	19.68
5061	NASDAQ	CHK	Thu, Apr 11, 2013	20.36	20.36	19.96	20.14
5060	NASDAQ	CHK	Wed, Apr 10, 2013	20.24	20.55	20.19	20.36
5059	NASDAQ	CHK	Tue, Apr 9, 2013	19.77	20.29	19.56	20.14
5058	NASDAQ	CHK	Mon, Apr 8, 2013	19.75	19.94	19.44	19.75
5057	NASDAQ	CHK	Fri, Apr 5, 2013	19.12	19.88	19.03	19.75
5056	NASDAQ	CHK	Thu, Apr 4, 2013	19.16	19.43	18.91	19.32
5055	NASDAQ	CHK	Wed, Apr 3, 2013	19.90	19.94	19.11	19.18
5054	NASDAQ	CHK	Tue, Apr 2, 2013	20.42	20.50	19.82	19.96
5053	NASDAQ	CHK	Mon, Apr 1, 2013	20.40	20.64	20.26	20.35
5052	NASDAQ	CHK	Thu, Mar 28, 2013	20.44	20.53	20.20	20.41
5051	NASDAQ	CHK	Wed, Mar 27, 2013	20.62	20.67	20.38	20.53
5050	NASDAQ	CHK	Tue, Mar 26, 2013	20.37	20.77	20.23	20.73
5049	NASDAQ	CHK	Mon, Mar 25, 2013	20.54	20.80	20.24	20.35
5048	NASDAQ	CHK	Fri, Mar 22, 2013	20.82	20.92	20.26	20.39
5047	NASDAQ	CHK	Thu, Mar 21, 2013	20.79	21.15	20.65	20.66
5046	NASDAQ	CHK	Wed, Mar 20, 2013	20.56	21.03	20.52	20.88
5045	NASDAQ	CHK	Tue, Mar 19, 2013	21.79	21.95	20.79	21.04
5044	NASDAQ	CHK	Mon, Mar 18, 2013	21.97	22.67	21.95	22.17
5043	NASDAQ	CHK	Fri, Mar 15, 2013	22.47	22.97	22.16	22.46
5042	NASDAQ	CHK	Thu, Mar 14, 2013	21.42	22.67	21.42	22.52
5041	NASDAQ	CHK	Wed, Mar 13, 2013	21.43	21.69	21.29	21.40
5040	NASDAQ	CHK	Tue, Mar 12, 2013	21.48	21.63	21.25	21.49
5039	NASDAQ	CHK	Mon, Mar 11, 2013	21.20	21.69	21.01	21.46
5038	NASDAQ	CHK	Fri, Mar 8, 2013	20.90	21.37	20.59	21.33
5037	NASDAQ	CHK	Thu, Mar 7, 2013	19.81	20.86	19.55	20.85
5036	NASDAQ	CHK	Wed, Mar 6, 2013	19.71	19.97	19.52	19.74
5035	NASDAQ	CHK	Tue, Mar 5, 2013	19.61	19.72	19.41	19.50
5034	NASDAQ	CHK	Mon, Mar 4, 2013	19.61	19.75	19.23	19.49
5033	NASDAQ	CHK	Fri, Mar 1, 2013	19.95	19.96	19.42	19.67
5032	NASDAQ	CHK	Thu, Feb 28, 2013	20.02	20.42	20.00	20.16
5031	NASDAQ	CHK	Wed, Feb 27, 2013	19.63	20.26	19.59	20.14
5030	NASDAQ	CHK	Tue, Feb 26, 2013	19.15	19.77	19.09	19.75
5029	NASDAQ	CHK	Mon, Feb 25, 2013	20.18	20.24	19.09	19.11
5028	NASDAQ	CHK	Fri, Feb 22, 2013	20.28	20.51	19.95	20.50
5027	NASDAQ	CHK	Thu, Feb 21, 2013	20.79	20.88	20.00	20.19
5026	NASDAQ	CHK	Wed, Feb 20, 2013	20.40	20.65	20.02	20.24
5025	NASDAQ	CHK	Tue, Feb 19, 2013	20.01	20.48	20.00	20.36
5024	NASDAQ	CHK	Fri, Feb 15, 2013	20.44	20.45	19.95	20.01
5023	NASDAQ	CHK	Thu, Feb 14, 2013	20.48	20.51	20.29	20.40
5022	NASDAQ	CHK	Wed, Feb 13, 2013	19.97	20.58	19.92	20.57
5021	NASDAQ	CHK	Tue, Feb 12, 2013	20.07	20.20	19.83	20.01
5020	NASDAQ	CHK	Mon, Feb 11, 2013	20.17	20.27	19.92	20.05
5019	NASDAQ	CHK	Fri, Feb 8, 2013	20.16	20.42	20.10	20.23
5018	NASDAQ	CHK	Thu, Feb 7, 2013	20.54	20.54	20.18	20.23
5017	NASDAQ	CHK	Wed, Feb 6, 2013	20.41	20.54	20.27	20.51
5016	NASDAQ	CHK	Tue, Feb 5, 2013	20.18	20.58	20.18	20.54
5015	NASDAQ	CHK	Mon, Feb 4, 2013	20.23	20.48	20.04	20.11
5014	NASDAQ	CHK	Fri, Feb 1, 2013	20.31	20.44	20.15	20.33
5013	NASDAQ	CHK	Thu, Jan 31, 2013	20.12	20.31	19.80	20.18
5012	NASDAQ	CHK	Wed, Jan 30, 2013	21.01	21.20	19.90	20.11
5011	NASDAQ	CHK	Tue, Jan 29, 2013	18.99	19.10	18.81	18.97
5010	NASDAQ	CHK	Mon, Jan 28, 2013	19.20	19.24	18.70	18.93
5009	NASDAQ	CHK	Fri, Jan 25, 2013	18.87	19.44	18.80	19.36
5008	NASDAQ	CHK	Thu, Jan 24, 2013	18.72	18.93	18.48	18.77
5007	NASDAQ	CHK	Wed, Jan 23, 2013	18.67	18.74	18.40	18.50
5006	NASDAQ	CHK	Tue, Jan 22, 2013	17.85	18.85	17.84	18.73
5005	NASDAQ	CHK	Fri, Jan 18, 2013	17.51	17.82	17.50	17.82
5004	NASDAQ	CHK	Thu, Jan 17, 2013	17.37	17.77	17.32	17.55
5003	NASDAQ	CHK	Wed, Jan 16, 2013	17.33	17.50	17.10	17.31
5002	NASDAQ	CHK	Tue, Jan 15, 2013	16.85	17.58	16.82	17.37
5001	NASDAQ	CHK	Mon, Jan 14, 2013	16.83	17.07	16.80	16.94
5000	NASDAQ	CHK	Fri, Jan 11, 2013	16.76	16.87	16.55	16.87
4999	NASDAQ	CHK	Thu, Jan 10, 2013	17.10	17.13	16.37	16.73
4998	NASDAQ	CHK	Wed, Jan 9, 2013	16.98	17.23	16.61	17.08
4997	NASDAQ	CHK	Tue, Jan 8, 2013	17.50	17.55	16.85	16.88
4996	NASDAQ	CHK	Mon, Jan 7, 2013	17.39	17.69	17.29	17.62
4995	NASDAQ	CHK	Fri, Jan 4, 2013	16.87	17.46	16.80	17.45
4994	NASDAQ	CHK	Thu, Jan 3, 2013	16.60	17.03	16.41	16.77
4993	NASDAQ	CHK	Wed, Jan 2, 2013	16.94	17.02	16.32	16.60
4992	NASDAQ	CHK	Mon, Dec 31, 2012	16.50	16.66	16.23	16.62
4991	NASDAQ	CHK	Fri, Dec 28, 2012	16.73	16.82	16.54	16.56
4990	NASDAQ	CHK	Thu, Dec 27, 2012	17.11	17.17	16.75	16.86
4989	NASDAQ	CHK	Wed, Dec 26, 2012	17.09	17.32	17.01	17.15
4988	NASDAQ	CHK	Mon, Dec 24, 2012	17.18	17.18	16.95	17.02
4987	NASDAQ	CHK	Fri, Dec 21, 2012	17.36	17.36	17.11	17.32
4986	NASDAQ	CHK	Thu, Dec 20, 2012	17.27	17.58	17.25	17.58
4985	NASDAQ	CHK	Wed, Dec 19, 2012	17.25	17.43	17.05	17.20
4984	NASDAQ	CHK	Tue, Dec 18, 2012	16.73	17.27	16.68	17.25
4983	NASDAQ	CHK	Mon, Dec 17, 2012	16.59	16.81	16.59	16.74
4982	NASDAQ	CHK	Fri, Dec 14, 2012	16.60	16.79	16.52	16.56
4981	NASDAQ	CHK	Thu, Dec 13, 2012	16.94	16.97	16.62	16.68
4980	NASDAQ	CHK	Wed, Dec 12, 2012	17.23	17.40	16.92	16.96
4979	NASDAQ	CHK	Tue, Dec 11, 2012	17.06	17.13	16.98	17.09
4978	NASDAQ	CHK	Mon, Dec 10, 2012	17.13	17.19	16.94	16.99
4977	NASDAQ	CHK	Fri, Dec 7, 2012	17.08	17.29	17.08	17.25
4976	NASDAQ	CHK	Thu, Dec 6, 2012	16.96	17.18	16.94	17.10
4975	NASDAQ	CHK	Wed, Dec 5, 2012	16.95	17.23	16.92	16.97
4974	NASDAQ	CHK	Tue, Dec 4, 2012	16.90	16.97	16.63	16.87
4973	NASDAQ	CHK	Mon, Dec 3, 2012	17.22	17.23	16.87	16.90
4972	NASDAQ	CHK	Fri, Nov 30, 2012	17.54	17.63	16.94	17.03
4971	NASDAQ	CHK	Thu, Nov 29, 2012	17.62	17.77	17.40	17.53
4970	NASDAQ	CHK	Wed, Nov 28, 2012	17.20	17.47	16.96	17.45
4969	NASDAQ	CHK	Tue, Nov 27, 2012	17.26	17.48	17.12	17.41
4968	NASDAQ	CHK	Mon, Nov 26, 2012	17.47	17.52	17.08	17.24
4967	NASDAQ	CHK	Fri, Nov 23, 2012	17.71	17.83	17.51	17.83
4966	NASDAQ	CHK	Wed, Nov 21, 2012	17.58	17.73	17.47	17.59
4965	NASDAQ	CHK	Tue, Nov 20, 2012	17.81	17.83	17.41	17.60
4964	NASDAQ	CHK	Mon, Nov 19, 2012	16.81	17.47	16.81	17.47
4963	NASDAQ	CHK	Fri, Nov 16, 2012	16.44	16.77	16.30	16.62
4962	NASDAQ	CHK	Thu, Nov 15, 2012	16.93	17.07	16.29	16.39
4961	NASDAQ	CHK	Wed, Nov 14, 2012	17.43	17.49	16.84	16.85
4960	NASDAQ	CHK	Tue, Nov 13, 2012	17.13	17.72	16.97	17.39
4959	NASDAQ	CHK	Mon, Nov 12, 2012	17.16	17.28	16.71	17.23
4958	NASDAQ	CHK	Fri, Nov 9, 2012	17.04	17.49	16.85	17.04
4957	NASDAQ	CHK	Thu, Nov 8, 2012	17.74	17.85	17.20	17.20
4956	NASDAQ	CHK	Wed, Nov 7, 2012	18.19	18.20	17.52	17.56
4955	NASDAQ	CHK	Tue, Nov 6, 2012	18.38	18.56	18.25	18.54
4954	NASDAQ	CHK	Mon, Nov 5, 2012	18.34	18.35	17.96	18.27
4953	NASDAQ	CHK	Fri, Nov 2, 2012	19.77	19.94	18.32	18.49
4952	NASDAQ	CHK	Thu, Nov 1, 2012	20.28	20.51	20.00	20.07
4951	NASDAQ	CHK	Wed, Oct 31, 2012	20.31	20.63	20.20	20.26
4950	NASDAQ	CHK	Fri, Oct 26, 2012	20.19	20.40	19.85	20.10
4949	NASDAQ	CHK	Thu, Oct 25, 2012	20.32	20.40	19.99	20.22
4948	NASDAQ	CHK	Wed, Oct 24, 2012	20.58	20.70	20.06	20.08
4947	NASDAQ	CHK	Tue, Oct 23, 2012	20.44	20.57	20.16	20.42
4946	NASDAQ	CHK	Mon, Oct 22, 2012	20.77	21.35	20.59	20.79
4945	NASDAQ	CHK	Fri, Oct 19, 2012	21.56	21.66	20.81	20.81
4944	NASDAQ	CHK	Thu, Oct 18, 2012	20.92	21.60	20.91	21.58
4943	NASDAQ	CHK	Wed, Oct 17, 2012	20.40	21.09	20.40	21.09
4942	NASDAQ	CHK	Tue, Oct 16, 2012	20.13	20.49	20.06	20.38
4941	NASDAQ	CHK	Mon, Oct 15, 2012	20.06	20.26	19.84	20.03
4940	NASDAQ	CHK	Fri, Oct 12, 2012	20.16	20.33	20.03	20.18
4939	NASDAQ	CHK	Thu, Oct 11, 2012	19.59	20.27	19.49	20.14
4938	NASDAQ	CHK	Wed, Oct 10, 2012	19.58	19.77	19.40	19.44
4937	NASDAQ	CHK	Tue, Oct 9, 2012	19.44	19.79	19.40	19.59
4936	NASDAQ	CHK	Mon, Oct 8, 2012	19.09	19.50	18.90	19.42
4935	NASDAQ	CHK	Fri, Oct 5, 2012	19.56	19.70	19.11	19.23
4934	NASDAQ	CHK	Thu, Oct 4, 2012	19.12	19.52	19.05	19.47
4933	NASDAQ	CHK	Wed, Oct 3, 2012	19.48	19.48	18.88	19.00
4932	NASDAQ	CHK	Tue, Oct 2, 2012	19.39	19.62	19.06	19.54
4931	NASDAQ	CHK	Mon, Oct 1, 2012	19.08	19.66	19.01	19.29
4930	NASDAQ	CHK	Fri, Sep 28, 2012	18.97	19.00	18.78	18.87
4929	NASDAQ	CHK	Thu, Sep 27, 2012	18.97	19.18	18.85	19.10
4928	NASDAQ	CHK	Wed, Sep 26, 2012	18.79	18.97	18.41	18.80
4927	NASDAQ	CHK	Tue, Sep 25, 2012	19.49	19.54	19.06	19.09
4926	NASDAQ	CHK	Mon, Sep 24, 2012	19.24	19.55	19.11	19.38
4925	NASDAQ	CHK	Fri, Sep 21, 2012	19.61	19.76	19.26	19.36
4924	NASDAQ	CHK	Thu, Sep 20, 2012	19.44	19.56	19.19	19.50
4923	NASDAQ	CHK	Wed, Sep 19, 2012	20.09	20.20	19.67	19.68
4922	NASDAQ	CHK	Tue, Sep 18, 2012	20.22	20.30	19.81	19.97
4921	NASDAQ	CHK	Mon, Sep 17, 2012	20.48	20.64	20.05	20.17
4920	NASDAQ	CHK	Fri, Sep 14, 2012	19.98	20.59	19.94	20.52
4919	NASDAQ	CHK	Thu, Sep 13, 2012	19.77	20.07	19.38	19.90
4918	NASDAQ	CHK	Wed, Sep 12, 2012	20.55	20.55	19.65	19.89
4917	NASDAQ	CHK	Tue, Sep 11, 2012	19.81	20.13	19.62	20.10
4916	NASDAQ	CHK	Mon, Sep 10, 2012	19.93	20.13	19.50	19.57
4915	NASDAQ	CHK	Fri, Sep 7, 2012	19.70	20.41	19.67	20.34
4914	NASDAQ	CHK	Thu, Sep 6, 2012	19.66	20.02	19.06	19.70
4913	NASDAQ	CHK	Wed, Sep 5, 2012	19.32	19.70	19.12	19.54
4912	NASDAQ	CHK	Tue, Sep 4, 2012	19.36	19.43	19.05	19.19
4911	NASDAQ	CHK	Fri, Aug 31, 2012	19.16	19.60	19.13	19.35
4910	NASDAQ	CHK	Thu, Aug 30, 2012	19.38	19.41	19.03	19.04
4909	NASDAQ	CHK	Wed, Aug 29, 2012	19.33	19.76	19.25	19.52
4908	NASDAQ	CHK	Tue, Aug 28, 2012	19.29	19.40	19.16	19.37
4907	NASDAQ	CHK	Mon, Aug 27, 2012	19.35	19.49	19.06	19.30
4906	NASDAQ	CHK	Fri, Aug 24, 2012	19.18	19.49	19.13	19.39
4905	NASDAQ	CHK	Thu, Aug 23, 2012	19.87	19.91	19.25	19.30
4904	NASDAQ	CHK	Wed, Aug 22, 2012	19.68	20.00	19.51	19.91
4903	NASDAQ	CHK	Tue, Aug 21, 2012	19.52	20.19	19.46	19.73
4902	NASDAQ	CHK	Mon, Aug 20, 2012	19.10	19.42	19.04	19.40
4901	NASDAQ	CHK	Fri, Aug 17, 2012	19.09	19.20	18.99	19.14
4900	NASDAQ	CHK	Thu, Aug 16, 2012	19.10	19.17	18.93	19.03
4899	NASDAQ	CHK	Wed, Aug 15, 2012	19.14	19.17	18.74	19.01
4898	NASDAQ	CHK	Tue, Aug 14, 2012	19.10	19.31	18.99	19.21
4897	NASDAQ	CHK	Mon, Aug 13, 2012	19.34	19.59	19.03	19.06
4896	NASDAQ	CHK	Fri, Aug 10, 2012	19.83	20.03	19.45	19.68
4895	NASDAQ	CHK	Thu, Aug 9, 2012	19.84	20.44	19.68	20.31
4894	NASDAQ	CHK	Wed, Aug 8, 2012	19.29	20.15	19.29	19.90
4893	NASDAQ	CHK	Tue, Aug 7, 2012	18.82	19.72	18.72	19.37
4892	NASDAQ	CHK	Mon, Aug 6, 2012	17.66	18.40	17.15	17.70
4891	NASDAQ	CHK	Fri, Aug 3, 2012	18.75	18.85	17.82	17.89
4890	NASDAQ	CHK	Thu, Aug 2, 2012	18.36	18.65	17.63	17.93
4889	NASDAQ	CHK	Wed, Aug 1, 2012	18.84	18.84	18.26	18.67
4888	NASDAQ	CHK	Tue, Jul 31, 2012	18.64	19.04	18.51	18.82
4887	NASDAQ	CHK	Mon, Jul 30, 2012	18.44	18.79	18.33	18.70
4886	NASDAQ	CHK	Fri, Jul 27, 2012	18.21	18.53	17.96	18.46
4885	NASDAQ	CHK	Thu, Jul 26, 2012	17.50	18.27	17.36	18.15
4884	NASDAQ	CHK	Wed, Jul 25, 2012	16.96	17.43	16.74	17.28
4883	NASDAQ	CHK	Tue, Jul 24, 2012	17.46	17.66	16.62	16.82
4882	NASDAQ	CHK	Mon, Jul 23, 2012	16.86	17.53	16.76	17.44
4881	NASDAQ	CHK	Fri, Jul 20, 2012	18.18	18.19	16.86	17.20
4880	NASDAQ	CHK	Thu, Jul 19, 2012	19.25	19.30	18.17	18.28
4879	NASDAQ	CHK	Wed, Jul 18, 2012	19.10	19.39	19.02	19.20
4878	NASDAQ	CHK	Tue, Jul 17, 2012	19.30	19.35	18.59	19.24
4877	NASDAQ	CHK	Mon, Jul 16, 2012	19.09	19.32	18.84	19.18
4876	NASDAQ	CHK	Fri, Jul 13, 2012	18.83	19.25	18.63	19.11
4875	NASDAQ	CHK	Thu, Jul 12, 2012	18.84	18.90	18.30	18.66
4874	NASDAQ	CHK	Wed, Jul 11, 2012	18.77	19.39	18.68	19.08
4873	NASDAQ	CHK	Tue, Jul 10, 2012	20.10	20.16	18.45	18.69
4872	NASDAQ	CHK	Mon, Jul 9, 2012	19.92	20.19	19.70	19.98
4871	NASDAQ	CHK	Fri, Jul 6, 2012	19.34	20.11	19.22	20.04
4870	NASDAQ	CHK	Thu, Jul 5, 2012	19.36	20.14	19.23	19.64
4869	NASDAQ	CHK	Tue, Jul 3, 2012	18.83	19.42	18.70	19.36
4868	NASDAQ	CHK	Mon, Jul 2, 2012	18.58	18.94	18.46	18.73
4867	NASDAQ	CHK	Fri, Jun 29, 2012	18.28	18.65	18.07	18.60
4866	NASDAQ	CHK	Thu, Jun 28, 2012	17.79	18.33	17.54	17.78
4865	NASDAQ	CHK	Wed, Jun 27, 2012	17.14	18.18	17.14	17.93
4864	NASDAQ	CHK	Tue, Jun 26, 2012	17.04	17.17	16.32	17.05
4863	NASDAQ	CHK	Mon, Jun 25, 2012	17.59	17.88	16.86	17.03
4862	NASDAQ	CHK	Fri, Jun 22, 2012	18.35	18.61	17.87	18.61
4861	NASDAQ	CHK	Thu, Jun 21, 2012	19.10	19.10	18.08	18.12
4860	NASDAQ	CHK	Wed, Jun 20, 2012	18.95	19.50	18.69	19.04
4859	NASDAQ	CHK	Tue, Jun 19, 2012	17.77	18.85	17.75	18.71
4858	NASDAQ	CHK	Mon, Jun 18, 2012	18.03	18.03	17.54	17.67
4857	NASDAQ	CHK	Fri, Jun 15, 2012	17.45	18.11	17.25	18.10
4856	NASDAQ	CHK	Thu, Jun 14, 2012	16.97	17.36	16.84	17.33
4855	NASDAQ	CHK	Wed, Jun 13, 2012	17.11	17.32	16.69	16.93
4854	NASDAQ	CHK	Tue, Jun 12, 2012	17.74	18.00	17.12	17.47
4853	NASDAQ	CHK	Mon, Jun 11, 2012	18.56	18.75	17.59	17.61
4852	NASDAQ	CHK	Fri, Jun 8, 2012	17.89	18.42	17.56	18.36
4851	NASDAQ	CHK	Thu, Jun 7, 2012	18.28	18.53	17.71	17.85
4850	NASDAQ	CHK	Wed, Jun 6, 2012	17.51	18.30	17.39	18.21
4849	NASDAQ	CHK	Tue, Jun 5, 2012	16.78	17.34	16.63	17.00
4848	NASDAQ	CHK	Mon, Jun 4, 2012	16.12	16.64	15.56	16.52
4847	NASDAQ	CHK	Fri, Jun 1, 2012	16.52	16.57	15.48	15.58
4846	NASDAQ	CHK	Thu, May 31, 2012	16.27	17.13	15.81	16.90
4845	NASDAQ	CHK	Wed, May 30, 2012	16.22	16.58	15.77	16.44
4844	NASDAQ	CHK	Tue, May 29, 2012	16.63	16.99	15.96	16.35
4843	NASDAQ	CHK	Fri, May 25, 2012	15.89	16.24	15.71	15.81
4842	NASDAQ	CHK	Thu, May 24, 2012	15.20	16.00	14.65	15.58
4841	NASDAQ	CHK	Wed, May 23, 2012	14.68	15.20	14.25	15.09
4840	NASDAQ	CHK	Tue, May 22, 2012	14.98	15.19	14.59	14.92
4839	NASDAQ	CHK	Mon, May 21, 2012	14.33	15.23	14.23	14.91
4838	NASDAQ	CHK	Fri, May 18, 2012	13.69	14.51	13.69	14.36
4837	NASDAQ	CHK	Thu, May 17, 2012	13.95	14.02	13.32	13.55
4836	NASDAQ	CHK	Wed, May 16, 2012	14.67	15.00	13.90	14.04
4835	NASDAQ	CHK	Tue, May 15, 2012	15.17	15.41	14.31	14.65
4834	NASDAQ	CHK	Mon, May 14, 2012	15.52	16.47	15.21	15.52
4833	NASDAQ	CHK	Fri, May 11, 2012	16.82	17.05	14.49	14.81
4832	NASDAQ	CHK	Thu, May 10, 2012	17.65	17.83	16.95	17.18
4831	NASDAQ	CHK	Wed, May 9, 2012	16.71	17.60	16.35	17.48
4830	NASDAQ	CHK	Tue, May 8, 2012	17.07	17.11	16.55	16.93
4829	NASDAQ	CHK	Mon, May 7, 2012	17.44	17.55	16.73	17.13
4828	NASDAQ	CHK	Fri, May 4, 2012	17.20	17.60	17.17	17.39
4827	NASDAQ	CHK	Thu, May 3, 2012	17.24	17.48	16.70	17.19
4826	NASDAQ	CHK	Wed, May 2, 2012	18.02	18.10	16.72	16.74
4825	NASDAQ	CHK	Tue, May 1, 2012	20.23	20.63	19.47	19.60
4824	NASDAQ	CHK	Mon, Apr 30, 2012	18.05	18.49	17.56	18.44
4823	NASDAQ	CHK	Fri, Apr 27, 2012	17.48	17.76	16.78	17.72
4822	NASDAQ	CHK	Thu, Apr 26, 2012	18.00	18.57	17.47	17.56
4821	NASDAQ	CHK	Wed, Apr 25, 2012	17.95	18.21	17.51	18.13
4820	NASDAQ	CHK	Tue, Apr 24, 2012	18.02	18.10	17.63	17.77
4819	NASDAQ	CHK	Mon, Apr 23, 2012	17.05	18.25	17.03	18.00
4818	NASDAQ	CHK	Fri, Apr 20, 2012	17.93	18.29	17.42	17.44
4817	NASDAQ	CHK	Thu, Apr 19, 2012	17.96	18.32	17.81	18.00
4816	NASDAQ	CHK	Wed, Apr 18, 2012	18.72	18.79	17.17	18.06
4815	NASDAQ	CHK	Tue, Apr 17, 2012	19.38	19.62	19.00	19.12
4814	NASDAQ	CHK	Mon, Apr 16, 2012	19.96	19.99	19.05	19.19
4813	NASDAQ	CHK	Fri, Apr 13, 2012	20.55	20.59	19.75	19.95
4812	NASDAQ	CHK	Thu, Apr 12, 2012	20.11	20.83	20.06	20.66
4811	NASDAQ	CHK	Wed, Apr 11, 2012	20.82	20.96	20.03	20.08
4810	NASDAQ	CHK	Tue, Apr 10, 2012	21.68	21.94	20.60	20.69
4809	NASDAQ	CHK	Mon, Apr 9, 2012	21.83	21.88	21.32	21.47
4808	NASDAQ	CHK	Thu, Apr 5, 2012	22.14	22.47	22.00	22.15
4807	NASDAQ	CHK	Wed, Apr 4, 2012	22.40	22.57	22.08	22.23
4806	NASDAQ	CHK	Tue, Apr 3, 2012	23.23	23.29	22.50	22.72
4805	NASDAQ	CHK	Mon, Apr 2, 2012	23.08	23.69	22.97	23.31
4804	NASDAQ	CHK	Fri, Mar 30, 2012	23.38	23.60	22.87	23.17
4803	NASDAQ	CHK	Thu, Mar 29, 2012	23.06	23.27	22.52	23.21
4802	NASDAQ	CHK	Wed, Mar 28, 2012	24.16	24.19	23.10	23.25
4801	NASDAQ	CHK	Tue, Mar 27, 2012	24.28	24.49	24.14	24.24
4800	NASDAQ	CHK	Mon, Mar 26, 2012	24.89	24.89	24.04	24.21
4799	NASDAQ	CHK	Fri, Mar 23, 2012	24.51	24.77	24.19	24.66
4798	NASDAQ	CHK	Thu, Mar 22, 2012	24.83	24.84	24.05	24.43
4797	NASDAQ	CHK	Wed, Mar 21, 2012	25.58	25.62	24.83	25.19
4796	NASDAQ	CHK	Tue, Mar 20, 2012	25.37	26.09	25.20	25.58
4795	NASDAQ	CHK	Mon, Mar 19, 2012	25.03	25.67	25.02	25.46
4794	NASDAQ	CHK	Fri, Mar 16, 2012	24.60	25.18	24.53	25.06
4793	NASDAQ	CHK	Thu, Mar 15, 2012	24.29	24.67	24.07	24.44
4792	NASDAQ	CHK	Wed, Mar 14, 2012	24.62	25.00	24.08	24.24
4791	NASDAQ	CHK	Tue, Mar 13, 2012	24.29	24.71	23.72	24.70
4790	NASDAQ	CHK	Mon, Mar 12, 2012	24.55	24.55	23.97	24.21
4789	NASDAQ	CHK	Fri, Mar 9, 2012	24.70	24.97	24.46	24.55
4788	NASDAQ	CHK	Thu, Mar 8, 2012	24.28	24.75	24.00	24.58
4787	NASDAQ	CHK	Wed, Mar 7, 2012	23.81	24.24	23.35	24.08
4786	NASDAQ	CHK	Tue, Mar 6, 2012	23.81	23.99	23.36	23.56
4785	NASDAQ	CHK	Mon, Mar 5, 2012	24.19	24.32	23.84	24.23
4784	NASDAQ	CHK	Fri, Mar 2, 2012	24.90	25.09	24.26	24.33
4783	NASDAQ	CHK	Thu, Mar 1, 2012	24.89	25.15	24.76	24.93
4782	NASDAQ	CHK	Wed, Feb 29, 2012	25.04	25.23	24.52	25.00
4781	NASDAQ	CHK	Tue, Feb 28, 2012	25.19	25.27	24.83	25.05
4780	NASDAQ	CHK	Mon, Feb 27, 2012	25.41	25.44	25.00	25.11
4779	NASDAQ	CHK	Fri, Feb 24, 2012	24.83	25.86	24.76	25.45
4778	NASDAQ	CHK	Thu, Feb 23, 2012	24.10	24.99	23.95	24.98
4777	NASDAQ	CHK	Wed, Feb 22, 2012	24.29	24.35	23.64	24.03
4776	NASDAQ	CHK	Tue, Feb 21, 2012	25.04	25.06	24.54	24.62
4775	NASDAQ	CHK	Fri, Feb 17, 2012	24.10	24.99	24.06	24.71
4774	NASDAQ	CHK	Thu, Feb 16, 2012	23.07	23.79	22.73	23.77
4773	NASDAQ	CHK	Wed, Feb 15, 2012	22.75	23.27	22.52	23.02
4772	NASDAQ	CHK	Tue, Feb 14, 2012	22.82	22.95	22.45	22.71
4771	NASDAQ	CHK	Mon, Feb 13, 2012	22.70	23.32	22.25	22.66
4770	NASDAQ	CHK	Fri, Feb 10, 2012	21.92	22.20	21.56	22.13
4769	NASDAQ	CHK	Thu, Feb 9, 2012	22.30	22.64	22.03	22.34
4768	NASDAQ	CHK	Wed, Feb 8, 2012	22.29	22.51	22.03	22.11
4767	NASDAQ	CHK	Tue, Feb 7, 2012	22.65	22.68	22.02	22.18
4766	NASDAQ	CHK	Mon, Feb 6, 2012	22.10	22.75	22.08	22.65
4765	NASDAQ	CHK	Fri, Feb 3, 2012	22.27	22.36	21.80	22.31
4764	NASDAQ	CHK	Thu, Feb 2, 2012	21.11	22.16	21.05	22.12
4763	NASDAQ	CHK	Wed, Feb 1, 2012	21.25	21.35	20.63	20.97
4762	NASDAQ	CHK	Tue, Jan 31, 2012	21.55	21.67	21.11	21.13
4761	NASDAQ	CHK	Mon, Jan 30, 2012	21.85	21.90	21.43	21.69
4760	NASDAQ	CHK	Fri, Jan 27, 2012	21.62	22.24	21.62	22.05
4759	NASDAQ	CHK	Thu, Jan 26, 2012	23.03	23.21	21.75	21.90
4758	NASDAQ	CHK	Wed, Jan 25, 2012	22.55	23.49	22.10	23.38
4757	NASDAQ	CHK	Tue, Jan 24, 2012	22.07	22.54	21.73	22.49
4756	NASDAQ	CHK	Mon, Jan 23, 2012	22.31	22.65	21.63	22.28
4755	NASDAQ	CHK	Fri, Jan 20, 2012	20.65	20.97	20.41	20.96
4754	NASDAQ	CHK	Thu, Jan 19, 2012	21.53	21.54	20.54	20.68
4753	NASDAQ	CHK	Wed, Jan 18, 2012	20.79	21.68	20.61	21.45
4752	NASDAQ	CHK	Tue, Jan 17, 2012	21.50	21.56	20.80	20.81
4751	NASDAQ	CHK	Fri, Jan 13, 2012	22.01	22.03	21.35	21.41
4750	NASDAQ	CHK	Thu, Jan 12, 2012	22.50	22.69	21.87	22.17
4749	NASDAQ	CHK	Wed, Jan 11, 2012	23.00	23.00	22.30	22.58
4748	NASDAQ	CHK	Tue, Jan 10, 2012	23.81	23.95	23.16	23.28
4747	NASDAQ	CHK	Mon, Jan 9, 2012	23.61	23.81	23.08	23.56
4746	NASDAQ	CHK	Fri, Jan 6, 2012	23.68	24.31	23.62	23.98
4745	NASDAQ	CHK	Thu, Jan 5, 2012	23.90	24.12	23.48	23.62
4744	NASDAQ	CHK	Wed, Jan 4, 2012	23.47	24.07	23.46	23.86
4743	NASDAQ	CHK	Tue, Jan 3, 2012	23.20	23.68	22.47	23.60
4742	NASDAQ	CHK	Fri, Dec 30, 2011	22.63	22.73	22.29	22.29
4741	NASDAQ	CHK	Thu, Dec 29, 2011	22.66	22.96	22.51	22.73
4740	NASDAQ	CHK	Wed, Dec 28, 2011	23.46	23.70	22.61	22.66
4739	NASDAQ	CHK	Tue, Dec 27, 2011	23.59	23.84	23.45	23.52
4738	NASDAQ	CHK	Fri, Dec 23, 2011	23.61	23.88	23.43	23.73
4737	NASDAQ	CHK	Thu, Dec 22, 2011	23.06	23.60	22.95	23.52
4736	NASDAQ	CHK	Wed, Dec 21, 2011	22.85	23.04	22.58	22.99
4735	NASDAQ	CHK	Tue, Dec 20, 2011	22.44	23.03	22.44	22.82
4734	NASDAQ	CHK	Mon, Dec 19, 2011	22.99	23.00	22.00	22.06
4733	NASDAQ	CHK	Fri, Dec 16, 2011	22.99	23.15	22.69	22.98
4732	NASDAQ	CHK	Thu, Dec 15, 2011	22.94	23.23	22.59	22.78
4731	NASDAQ	CHK	Wed, Dec 14, 2011	23.21	23.21	22.50	22.57
4730	NASDAQ	CHK	Tue, Dec 13, 2011	23.98	24.31	23.27	23.43
4729	NASDAQ	CHK	Mon, Dec 12, 2011	24.31	24.31	23.46	23.72
4728	NASDAQ	CHK	Fri, Dec 9, 2011	24.25	24.79	24.20	24.66
4727	NASDAQ	CHK	Thu, Dec 8, 2011	25.31	25.45	24.15	24.23
4726	NASDAQ	CHK	Wed, Dec 7, 2011	25.70	25.75	25.14	25.53
4725	NASDAQ	CHK	Tue, Dec 6, 2011	25.02	25.86	25.02	25.68
4724	NASDAQ	CHK	Mon, Dec 5, 2011	25.80	25.94	24.96	25.15
4723	NASDAQ	CHK	Fri, Dec 2, 2011	25.62	26.16	25.35	25.44
4722	NASDAQ	CHK	Thu, Dec 1, 2011	25.23	25.67	25.00	25.30
4721	NASDAQ	CHK	Wed, Nov 30, 2011	24.76	25.40	24.57	25.34
4720	NASDAQ	CHK	Tue, Nov 29, 2011	23.47	24.08	23.35	23.78
4719	NASDAQ	CHK	Mon, Nov 28, 2011	23.39	23.55	23.08	23.36
4718	NASDAQ	CHK	Fri, Nov 25, 2011	22.72	22.84	22.41	22.42
4717	NASDAQ	CHK	Wed, Nov 23, 2011	23.32	23.49	22.71	22.71
4716	NASDAQ	CHK	Tue, Nov 22, 2011	24.03	24.34	23.45	23.66
4715	NASDAQ	CHK	Mon, Nov 21, 2011	23.89	24.26	23.37	24.07
4714	NASDAQ	CHK	Fri, Nov 18, 2011	24.95	25.12	24.23	24.33
4713	NASDAQ	CHK	Thu, Nov 17, 2011	25.43	25.63	24.51	24.72
4712	NASDAQ	CHK	Wed, Nov 16, 2011	25.36	26.10	25.20	25.46
4711	NASDAQ	CHK	Tue, Nov 15, 2011	25.45	25.67	25.00	25.47
4710	NASDAQ	CHK	Mon, Nov 14, 2011	26.16	26.28	25.49	25.67
4709	NASDAQ	CHK	Fri, Nov 11, 2011	25.83	26.85	25.32	26.45
4708	NASDAQ	CHK	Thu, Nov 10, 2011	26.18	26.37	25.30	25.54
4707	NASDAQ	CHK	Wed, Nov 9, 2011	26.27	26.57	25.50	25.57
4706	NASDAQ	CHK	Tue, Nov 8, 2011	27.06	27.12	26.22	27.09
4705	NASDAQ	CHK	Mon, Nov 7, 2011	27.38	27.49	26.31	26.84
4704	NASDAQ	CHK	Fri, Nov 4, 2011	29.69	29.85	26.82	27.07
4703	NASDAQ	CHK	Thu, Nov 3, 2011	28.62	29.23	27.78	29.03
4702	NASDAQ	CHK	Wed, Nov 2, 2011	27.60	28.27	27.49	28.01
4701	NASDAQ	CHK	Tue, Nov 1, 2011	26.97	27.50	26.50	27.00
4700	NASDAQ	CHK	Mon, Oct 31, 2011	29.36	29.36	28.09	28.12
4699	NASDAQ	CHK	Fri, Oct 28, 2011	28.76	29.84	28.75	29.74
4698	NASDAQ	CHK	Thu, Oct 27, 2011	28.80	29.87	28.77	29.36
4697	NASDAQ	CHK	Wed, Oct 26, 2011	28.00	28.31	27.16	28.15
4696	NASDAQ	CHK	Tue, Oct 25, 2011	28.16	28.17	27.24	27.31
4695	NASDAQ	CHK	Mon, Oct 24, 2011	28.21	28.42	27.96	28.32
4694	NASDAQ	CHK	Fri, Oct 21, 2011	27.69	28.06	27.39	27.81
4693	NASDAQ	CHK	Thu, Oct 20, 2011	27.61	27.65	26.62	27.30
4692	NASDAQ	CHK	Wed, Oct 19, 2011	27.31	27.81	26.97	27.10
4691	NASDAQ	CHK	Tue, Oct 18, 2011	26.96	27.50	25.94	27.36
4690	NASDAQ	CHK	Mon, Oct 17, 2011	27.76	27.95	27.20	27.30
4689	NASDAQ	CHK	Fri, Oct 14, 2011	27.42	27.75	27.10	27.75
4688	NASDAQ	CHK	Thu, Oct 13, 2011	26.59	26.99	26.00	26.85
4687	NASDAQ	CHK	Wed, Oct 12, 2011	26.91	27.34	26.67	26.75
4686	NASDAQ	CHK	Tue, Oct 11, 2011	26.38	26.93	26.22	26.62
4685	NASDAQ	CHK	Mon, Oct 10, 2011	26.06	26.75	26.00	26.75
4684	NASDAQ	CHK	Fri, Oct 7, 2011	26.39	26.74	25.23	25.35
4683	NASDAQ	CHK	Thu, Oct 6, 2011	25.22	26.35	25.01	25.91
4682	NASDAQ	CHK	Wed, Oct 5, 2011	25.21	25.49	24.59	25.39
4681	NASDAQ	CHK	Tue, Oct 4, 2011	23.40	25.15	22.52	25.12
4680	NASDAQ	CHK	Mon, Oct 3, 2011	25.26	25.48	23.96	23.96
4679	NASDAQ	CHK	Fri, Sep 30, 2011	26.52	26.52	25.54	25.55
4678	NASDAQ	CHK	Thu, Sep 29, 2011	27.62	27.94	26.06	26.78
4677	NASDAQ	CHK	Wed, Sep 28, 2011	29.25	29.60	27.22	27.27
4676	NASDAQ	CHK	Tue, Sep 27, 2011	28.39	28.60	27.53	27.68
4675	NASDAQ	CHK	Mon, Sep 26, 2011	26.27	27.57	25.63	27.53
4674	NASDAQ	CHK	Fri, Sep 23, 2011	26.89	27.17	25.92	26.04
4673	NASDAQ	CHK	Thu, Sep 22, 2011	28.45	28.45	26.67	27.08
4672	NASDAQ	CHK	Wed, Sep 21, 2011	30.62	31.26	29.38	29.42
4671	NASDAQ	CHK	Tue, Sep 20, 2011	31.22	31.66	30.33	30.41
4670	NASDAQ	CHK	Mon, Sep 19, 2011	31.11	31.45	30.33	31.06
4669	NASDAQ	CHK	Fri, Sep 16, 2011	31.94	32.00	31.27	31.82
4668	NASDAQ	CHK	Thu, Sep 15, 2011	31.88	32.07	31.25	31.72
4667	NASDAQ	CHK	Wed, Sep 14, 2011	31.53	31.96	30.85	31.52
4666	NASDAQ	CHK	Tue, Sep 13, 2011	30.90	31.86	30.67	31.49
4665	NASDAQ	CHK	Mon, Sep 12, 2011	29.65	30.77	29.52	30.76
4664	NASDAQ	CHK	Fri, Sep 9, 2011	31.49	31.69	30.20	30.38
4663	NASDAQ	CHK	Thu, Sep 8, 2011	31.67	32.51	31.46	31.96
4662	NASDAQ	CHK	Wed, Sep 7, 2011	31.39	31.90	30.72	31.51
4661	NASDAQ	CHK	Tue, Sep 6, 2011	30.68	31.36	30.13	30.92
4660	NASDAQ	CHK	Fri, Sep 2, 2011	32.21	32.67	31.74	32.11
4659	NASDAQ	CHK	Thu, Sep 1, 2011	32.69	33.87	32.62	33.11
4658	NASDAQ	CHK	Wed, Aug 31, 2011	32.61	33.31	32.13	32.39
4657	NASDAQ	CHK	Tue, Aug 30, 2011	31.41	32.70	31.22	32.43
4656	NASDAQ	CHK	Mon, Aug 29, 2011	30.91	31.81	30.87	31.77
4655	NASDAQ	CHK	Fri, Aug 26, 2011	29.06	30.52	28.64	30.52
4654	NASDAQ	CHK	Thu, Aug 25, 2011	30.62	30.83	29.41	29.55
4653	NASDAQ	CHK	Wed, Aug 24, 2011	29.64	30.18	29.25	30.18
4652	NASDAQ	CHK	Tue, Aug 23, 2011	28.63	29.65	28.17	29.65
4651	NASDAQ	CHK	Mon, Aug 22, 2011	29.79	30.00	28.25	28.42
4650	NASDAQ	CHK	Fri, Aug 19, 2011	29.26	30.46	29.15	29.31
4649	NASDAQ	CHK	Thu, Aug 18, 2011	30.64	30.67	29.52	29.82
4648	NASDAQ	CHK	Wed, Aug 17, 2011	32.01	32.59	31.50	31.70
4647	NASDAQ	CHK	Tue, Aug 16, 2011	31.76	32.13	31.17	31.66
4646	NASDAQ	CHK	Mon, Aug 15, 2011	31.58	32.46	31.58	32.29
4645	NASDAQ	CHK	Fri, Aug 12, 2011	31.51	32.03	31.10	31.30
4644	NASDAQ	CHK	Thu, Aug 11, 2011	29.38	31.38	29.12	30.89
4643	NASDAQ	CHK	Wed, Aug 10, 2011	28.48	30.25	28.27	28.78
4642	NASDAQ	CHK	Tue, Aug 9, 2011	28.05	29.16	26.97	29.12
4641	NASDAQ	CHK	Mon, Aug 8, 2011	28.71	29.65	27.00	27.20
4640	NASDAQ	CHK	Fri, Aug 5, 2011	31.87	32.00	29.58	30.68
4639	NASDAQ	CHK	Thu, Aug 4, 2011	33.85	33.86	31.26	31.35
4638	NASDAQ	CHK	Wed, Aug 3, 2011	34.63	35.07	33.61	34.23
4637	NASDAQ	CHK	Tue, Aug 2, 2011	35.24	35.75	34.15	34.15
4636	NASDAQ	CHK	Mon, Aug 1, 2011	35.39	35.45	33.84	34.35
4635	NASDAQ	CHK	Fri, Jul 29, 2011	34.43	35.07	34.00	34.35
4634	NASDAQ	CHK	Thu, Jul 28, 2011	33.28	34.44	33.16	33.43
4633	NASDAQ	CHK	Wed, Jul 27, 2011	33.97	34.09	33.17	33.40
4632	NASDAQ	CHK	Tue, Jul 26, 2011	34.02	34.83	33.65	34.11
4631	NASDAQ	CHK	Mon, Jul 25, 2011	33.81	34.39	33.66	33.87
4630	NASDAQ	CHK	Fri, Jul 22, 2011	34.07	34.42	33.86	34.39
4629	NASDAQ	CHK	Thu, Jul 21, 2011	33.80	34.29	33.78	33.98
4628	NASDAQ	CHK	Wed, Jul 20, 2011	33.87	33.87	33.35	33.72
4627	NASDAQ	CHK	Tue, Jul 19, 2011	33.20	33.73	33.20	33.66
4626	NASDAQ	CHK	Mon, Jul 18, 2011	32.63	33.22	32.30	32.89
4625	NASDAQ	CHK	Fri, Jul 15, 2011	31.78	32.96	31.59	32.96
4624	NASDAQ	CHK	Thu, Jul 14, 2011	30.15	30.75	30.12	30.21
4623	NASDAQ	CHK	Wed, Jul 13, 2011	29.97	30.35	29.86	29.94
4622	NASDAQ	CHK	Tue, Jul 12, 2011	29.57	30.19	29.39	29.77
4621	NASDAQ	CHK	Mon, Jul 11, 2011	30.14	30.21	29.55	29.75
4620	NASDAQ	CHK	Fri, Jul 8, 2011	30.26	30.84	30.15	30.58
4619	NASDAQ	CHK	Thu, Jul 7, 2011	30.64	30.86	30.33	30.51
4618	NASDAQ	CHK	Wed, Jul 6, 2011	30.22	30.29	29.83	30.18
4617	NASDAQ	CHK	Tue, Jul 5, 2011	29.93	30.64	29.91	30.29
4616	NASDAQ	CHK	Fri, Jul 1, 2011	29.74	30.18	29.24	30.10
4615	NASDAQ	CHK	Thu, Jun 30, 2011	29.18	30.27	29.11	29.69
4614	NASDAQ	CHK	Wed, Jun 29, 2011	28.53	29.22	28.52	29.05
4613	NASDAQ	CHK	Tue, Jun 28, 2011	28.22	28.53	28.12	28.51
4612	NASDAQ	CHK	Mon, Jun 27, 2011	27.33	28.27	27.28	28.00
4611	NASDAQ	CHK	Fri, Jun 24, 2011	28.98	29.00	27.99	28.01
4610	NASDAQ	CHK	Thu, Jun 23, 2011	28.59	29.01	28.15	28.97
4609	NASDAQ	CHK	Wed, Jun 22, 2011	28.63	29.44	28.61	28.99
4608	NASDAQ	CHK	Tue, Jun 21, 2011	28.30	28.94	28.29	28.79
4607	NASDAQ	CHK	Mon, Jun 20, 2011	27.65	28.20	27.50	28.10
4606	NASDAQ	CHK	Fri, Jun 17, 2011	28.36	28.46	27.77	28.02
4605	NASDAQ	CHK	Thu, Jun 16, 2011	28.72	29.08	27.93	28.17
4604	NASDAQ	CHK	Wed, Jun 15, 2011	28.83	29.26	28.43	28.76
4603	NASDAQ	CHK	Tue, Jun 14, 2011	28.71	29.13	28.66	28.98
4602	NASDAQ	CHK	Mon, Jun 13, 2011	29.28	29.58	28.15	28.32
4601	NASDAQ	CHK	Fri, Jun 10, 2011	29.63	29.93	29.10	29.24
4600	NASDAQ	CHK	Thu, Jun 9, 2011	29.73	30.16	29.64	29.75
4599	NASDAQ	CHK	Wed, Jun 8, 2011	29.72	30.18	29.37	29.59
4598	NASDAQ	CHK	Tue, Jun 7, 2011	29.81	30.16	29.30	29.73
4597	NASDAQ	CHK	Mon, Jun 6, 2011	30.53	30.85	29.64	29.68
4596	NASDAQ	CHK	Fri, Jun 3, 2011	30.11	30.76	29.89	30.53
4595	NASDAQ	CHK	Thu, Jun 2, 2011	30.43	30.89	30.09	30.55
4594	NASDAQ	CHK	Wed, Jun 1, 2011	31.29	31.40	30.34	30.39
4593	NASDAQ	CHK	Tue, May 31, 2011	31.61	31.70	30.96	31.34
4592	NASDAQ	CHK	Fri, May 27, 2011	31.37	31.59	30.95	31.11
4591	NASDAQ	CHK	Thu, May 26, 2011	30.94	31.17	30.57	31.08
4590	NASDAQ	CHK	Wed, May 25, 2011	30.87	31.33	30.78	31.00
4589	NASDAQ	CHK	Tue, May 24, 2011	30.38	31.64	30.38	30.92
4588	NASDAQ	CHK	Mon, May 23, 2011	29.95	30.39	29.86	30.20
4587	NASDAQ	CHK	Fri, May 20, 2011	31.70	32.83	31.27	32.37
4586	NASDAQ	CHK	Thu, May 19, 2011	31.95	32.03	31.24	31.62
4585	NASDAQ	CHK	Wed, May 18, 2011	30.79	31.81	30.75	31.66
4584	NASDAQ	CHK	Tue, May 17, 2011	30.70	31.20	30.40	30.75
4583	NASDAQ	CHK	Mon, May 16, 2011	31.53	32.11	30.99	31.31
4582	NASDAQ	CHK	Fri, May 13, 2011	32.26	32.31	31.33	31.48
4581	NASDAQ	CHK	Thu, May 12, 2011	32.34	32.69	31.60	32.22
4580	NASDAQ	CHK	Wed, May 11, 2011	33.26	33.30	32.28	32.69
4579	NASDAQ	CHK	Tue, May 10, 2011	33.16	33.64	32.77	33.43
4578	NASDAQ	CHK	Mon, May 9, 2011	32.96	33.42	32.88	33.09
4577	NASDAQ	CHK	Fri, May 6, 2011	33.25	33.73	32.42	32.72
4576	NASDAQ	CHK	Thu, May 5, 2011	31.79	33.02	31.29	32.63
4575	NASDAQ	CHK	Wed, May 4, 2011	33.07	33.10	31.83	32.49
4574	NASDAQ	CHK	Tue, May 3, 2011	33.99	34.24	32.52	33.12
4573	NASDAQ	CHK	Mon, May 2, 2011	35.83	35.84	34.97	35.13
4572	NASDAQ	CHK	Fri, Apr 29, 2011	35.06	35.65	35.03	35.60
4571	NASDAQ	CHK	Thu, Apr 28, 2011	34.82	35.24	34.28	35.12
4570	NASDAQ	CHK	Wed, Apr 27, 2011	35.28	35.28	34.31	35.02
4569	NASDAQ	CHK	Tue, Apr 26, 2011	34.37	35.14	34.36	34.98
4568	NASDAQ	CHK	Mon, Apr 25, 2011	34.41	34.86	34.23	34.37
4567	NASDAQ	CHK	Thu, Apr 21, 2011	34.20	34.66	33.54	34.56
4566	NASDAQ	CHK	Wed, Apr 20, 2011	34.18	34.85	33.84	34.05
4565	NASDAQ	CHK	Tue, Apr 19, 2011	33.84	33.95	33.42	33.81
4564	NASDAQ	CHK	Mon, Apr 18, 2011	34.03	34.17	33.09	33.81
4563	NASDAQ	CHK	Fri, Apr 15, 2011	34.51	34.68	34.00	34.60
4562	NASDAQ	CHK	Thu, Apr 14, 2011	34.16	34.59	33.83	34.52
4561	NASDAQ	CHK	Wed, Apr 13, 2011	34.07	34.77	34.00	34.25
4560	NASDAQ	CHK	Tue, Apr 12, 2011	34.54	34.67	33.45	33.76
4559	NASDAQ	CHK	Mon, Apr 11, 2011	36.38	36.41	35.10	35.25
4558	NASDAQ	CHK	Fri, Apr 8, 2011	36.56	36.69	35.73	35.97
4557	NASDAQ	CHK	Thu, Apr 7, 2011	35.58	36.47	35.47	36.46
4556	NASDAQ	CHK	Wed, Apr 6, 2011	35.93	36.30	35.40	35.61
4555	NASDAQ	CHK	Tue, Apr 5, 2011	35.56	36.07	35.52	35.74
4554	NASDAQ	CHK	Mon, Apr 4, 2011	35.44	35.86	34.99	35.77
4553	NASDAQ	CHK	Fri, Apr 1, 2011	35.86	35.99	35.29	35.42
4552	NASDAQ	CHK	Thu, Mar 31, 2011	36.56	36.74	35.36	35.44
4551	NASDAQ	CHK	Wed, Mar 30, 2011	36.03	36.43	35.77	36.29
4550	NASDAQ	CHK	Tue, Mar 29, 2011	35.24	35.46	34.93	35.28
4549	NASDAQ	CHK	Mon, Mar 28, 2011	36.35	36.36	34.93	34.95
4548	NASDAQ	CHK	Fri, Mar 25, 2011	35.92	36.37	35.69	36.20
4547	NASDAQ	CHK	Thu, Mar 24, 2011	35.79	35.92	35.44	35.82
4546	NASDAQ	CHK	Wed, Mar 23, 2011	35.72	36.02	35.25	35.66
4545	NASDAQ	CHK	Tue, Mar 22, 2011	35.83	35.95	35.47	35.63
4544	NASDAQ	CHK	Mon, Mar 21, 2011	35.69	36.04	35.47	35.68
4543	NASDAQ	CHK	Fri, Mar 18, 2011	36.28	36.35	35.13	35.28
4542	NASDAQ	CHK	Thu, Mar 17, 2011	37.14	37.39	35.93	35.95
4541	NASDAQ	CHK	Wed, Mar 16, 2011	36.23	37.33	35.87	36.63
4540	NASDAQ	CHK	Tue, Mar 15, 2011	34.31	35.85	34.04	35.53
4539	NASDAQ	CHK	Mon, Mar 14, 2011	35.47	36.14	35.24	35.48
4538	NASDAQ	CHK	Fri, Mar 11, 2011	33.06	34.86	32.52	34.69
4537	NASDAQ	CHK	Thu, Mar 10, 2011	34.72	34.72	33.46	33.94
4536	NASDAQ	CHK	Wed, Mar 9, 2011	34.37	35.65	34.34	35.47
4535	NASDAQ	CHK	Tue, Mar 8, 2011	35.42	35.42	34.32	34.47
4534	NASDAQ	CHK	Mon, Mar 7, 2011	35.69	36.52	35.16	35.36
4533	NASDAQ	CHK	Fri, Mar 4, 2011	35.79	35.79	35.02	35.49
4532	NASDAQ	CHK	Thu, Mar 3, 2011	36.27	36.27	34.73	35.55
4531	NASDAQ	CHK	Wed, Mar 2, 2011	35.41	35.89	34.84	35.83
4530	NASDAQ	CHK	Tue, Mar 1, 2011	37.81	37.99	35.52	35.63
4529	NASDAQ	CHK	Mon, Feb 28, 2011	37.76	38.01	37.11	37.65
4528	NASDAQ	CHK	Fri, Feb 25, 2011	36.56	37.62	36.41	37.39
4527	NASDAQ	CHK	Thu, Feb 24, 2011	37.53	37.85	35.77	36.32
4526	NASDAQ	CHK	Wed, Feb 23, 2011	34.48	36.47	33.57	36.29
4525	NASDAQ	CHK	Tue, Feb 22, 2011	33.75	34.89	33.34	33.84
4524	NASDAQ	CHK	Fri, Feb 18, 2011	32.19	32.49	31.93	32.17
4523	NASDAQ	CHK	Thu, Feb 17, 2011	32.38	32.62	31.89	32.23
4522	NASDAQ	CHK	Wed, Feb 16, 2011	32.66	32.69	32.19	32.44
4521	NASDAQ	CHK	Tue, Feb 15, 2011	33.13	33.21	32.22	32.48
4520	NASDAQ	CHK	Mon, Feb 14, 2011	32.52	33.40	32.51	33.33
4519	NASDAQ	CHK	Fri, Feb 11, 2011	32.64	32.74	32.20	32.60
4518	NASDAQ	CHK	Thu, Feb 10, 2011	32.42	32.72	32.03	32.58
4517	NASDAQ	CHK	Wed, Feb 9, 2011	33.08	33.30	32.39	32.64
4516	NASDAQ	CHK	Tue, Feb 8, 2011	32.93	33.39	32.63	33.34
4515	NASDAQ	CHK	Mon, Feb 7, 2011	32.85	34.01	32.74	33.06
4514	NASDAQ	CHK	Fri, Feb 4, 2011	32.32	32.74	31.70	31.78
4513	NASDAQ	CHK	Thu, Feb 3, 2011	32.31	32.41	31.49	32.21
4512	NASDAQ	CHK	Wed, Feb 2, 2011	32.05	33.23	32.01	32.26
4511	NASDAQ	CHK	Tue, Feb 1, 2011	31.16	32.38	30.85	31.96
4510	NASDAQ	CHK	Mon, Jan 31, 2011	29.09	31.43	29.04	31.22
4509	NASDAQ	CHK	Fri, Jan 28, 2011	29.17	29.46	28.81	28.89
4508	NASDAQ	CHK	Thu, Jan 27, 2011	29.37	29.73	29.03	29.28
4507	NASDAQ	CHK	Wed, Jan 26, 2011	29.20	29.80	29.07	29.66
4506	NASDAQ	CHK	Tue, Jan 25, 2011	29.61	29.76	28.79	29.00
4505	NASDAQ	CHK	Mon, Jan 24, 2011	29.16	29.80	29.16	29.76
4504	NASDAQ	CHK	Fri, Jan 21, 2011	29.53	29.74	29.26	29.39
4503	NASDAQ	CHK	Thu, Jan 20, 2011	29.14	29.59	28.81	29.40
4502	NASDAQ	CHK	Wed, Jan 19, 2011	29.20	29.67	29.17	29.42
4501	NASDAQ	CHK	Tue, Jan 18, 2011	29.30	29.43	29.03	29.25
4500	NASDAQ	CHK	Fri, Jan 14, 2011	29.24	29.40	29.00	29.24
4499	NASDAQ	CHK	Thu, Jan 13, 2011	29.53	29.60	29.21	29.28
4498	NASDAQ	CHK	Wed, Jan 12, 2011	29.04	29.60	29.03	29.49
4497	NASDAQ	CHK	Tue, Jan 11, 2011	28.58	28.96	28.33	28.90
4496	NASDAQ	CHK	Mon, Jan 10, 2011	28.37	28.60	28.05	28.50
4495	NASDAQ	CHK	Fri, Jan 7, 2011	28.24	28.57	28.15	28.49
4494	NASDAQ	CHK	Thu, Jan 6, 2011	28.33	28.93	28.12	28.20
4493	NASDAQ	CHK	Wed, Jan 5, 2011	27.64	28.11	27.52	28.02
4492	NASDAQ	CHK	Tue, Jan 4, 2011	28.22	28.22	27.41	27.72
4491	NASDAQ	CHK	Mon, Jan 3, 2011	27.90	28.17	27.71	28.03
4490	NASDAQ	CHK	Fri, Dec 31, 2010	27.37	27.56	27.23	27.39
4489	NASDAQ	CHK	Thu, Dec 30, 2010	27.56	27.94	27.41	27.46
4488	NASDAQ	CHK	Wed, Dec 29, 2010	27.46	27.68	27.27	27.65
4487	NASDAQ	CHK	Tue, Dec 28, 2010	27.17	27.47	27.10	27.33
4486	NASDAQ	CHK	Mon, Dec 27, 2010	26.94	27.14	26.71	27.03
4485	NASDAQ	CHK	Thu, Dec 23, 2010	26.56	27.27	26.52	27.08
4484	NASDAQ	CHK	Wed, Dec 22, 2010	26.77	26.96	26.59	26.86
4483	NASDAQ	CHK	Tue, Dec 21, 2010	26.59	26.91	26.25	26.83
4482	NASDAQ	CHK	Mon, Dec 20, 2010	25.17	26.82	25.13	26.81
4481	NASDAQ	CHK	Fri, Dec 17, 2010	24.83	24.87	24.56	24.63
4480	NASDAQ	CHK	Thu, Dec 16, 2010	24.83	25.10	24.69	24.92
4479	NASDAQ	CHK	Wed, Dec 15, 2010	24.22	24.96	24.22	24.86
4478	NASDAQ	CHK	Tue, Dec 14, 2010	24.08	24.40	24.06	24.34
4477	NASDAQ	CHK	Mon, Dec 13, 2010	24.38	24.49	24.16	24.22
4476	NASDAQ	CHK	Fri, Dec 10, 2010	24.18	24.29	24.00	24.23
4475	NASDAQ	CHK	Thu, Dec 9, 2010	24.25	24.36	24.02	24.14
4474	NASDAQ	CHK	Wed, Dec 8, 2010	24.05	24.55	24.00	24.20
4473	NASDAQ	CHK	Tue, Dec 7, 2010	24.07	24.20	23.66	24.04
4472	NASDAQ	CHK	Mon, Dec 6, 2010	23.41	24.00	23.33	23.84
4471	NASDAQ	CHK	Fri, Dec 3, 2010	22.83	23.50	22.80	23.43
4470	NASDAQ	CHK	Thu, Dec 2, 2010	22.67	23.12	22.59	22.87
4469	NASDAQ	CHK	Wed, Dec 1, 2010	22.58	22.69	22.32	22.64
4468	NASDAQ	CHK	Tue, Nov 30, 2010	22.92	23.05	22.31	22.33
4467	NASDAQ	CHK	Mon, Nov 29, 2010	23.21	23.36	22.93	23.31
4466	NASDAQ	CHK	Fri, Nov 26, 2010	23.30	23.60	23.20	23.25
4465	NASDAQ	CHK	Wed, Nov 24, 2010	23.26	23.62	23.12	23.45
4464	NASDAQ	CHK	Tue, Nov 23, 2010	23.47	23.52	23.02	23.07
4463	NASDAQ	CHK	Mon, Nov 22, 2010	23.89	23.89	23.31	23.83
4462	NASDAQ	CHK	Fri, Nov 19, 2010	23.46	23.96	23.31	23.94
4461	NASDAQ	CHK	Thu, Nov 18, 2010	23.38	23.79	23.36	23.52
4460	NASDAQ	CHK	Wed, Nov 17, 2010	23.31	23.55	23.18	23.36
4459	NASDAQ	CHK	Tue, Nov 16, 2010	23.44	23.51	23.02	23.22
4458	NASDAQ	CHK	Mon, Nov 15, 2010	24.25	24.29	23.52	23.59
4457	NASDAQ	CHK	Fri, Nov 12, 2010	24.29	24.29	23.68	24.02
4456	NASDAQ	CHK	Thu, Nov 11, 2010	24.62	24.63	24.05	24.54
4455	NASDAQ	CHK	Wed, Nov 10, 2010	24.58	24.90	24.21	24.75
4454	NASDAQ	CHK	Tue, Nov 9, 2010	24.70	24.97	24.22	24.38
4453	NASDAQ	CHK	Mon, Nov 8, 2010	23.53	24.08	23.49	24.00
4452	NASDAQ	CHK	Fri, Nov 5, 2010	23.43	23.57	23.29	23.54
4451	NASDAQ	CHK	Thu, Nov 4, 2010	23.26	23.62	22.99	23.57
4450	NASDAQ	CHK	Wed, Nov 3, 2010	23.41	23.60	23.10	23.59
4449	NASDAQ	CHK	Tue, Nov 2, 2010	23.33	23.45	23.10	23.31
4448	NASDAQ	CHK	Mon, Nov 1, 2010	23.28	23.50	22.99	23.08
4447	NASDAQ	CHK	Fri, Oct 29, 2010	22.49	23.03	22.41	22.92
4446	NASDAQ	CHK	Thu, Oct 28, 2010	22.70	22.71	22.32	22.55
4445	NASDAQ	CHK	Wed, Oct 27, 2010	22.32	22.68	22.20	22.59
4444	NASDAQ	CHK	Tue, Oct 26, 2010	22.24	22.52	22.17	22.48
4443	NASDAQ	CHK	Mon, Oct 25, 2010	22.64	22.71	22.20	22.37
4442	NASDAQ	CHK	Fri, Oct 22, 2010	23.23	23.29	22.35	22.41
4441	NASDAQ	CHK	Thu, Oct 21, 2010	23.53	23.55	22.91	23.21
4440	NASDAQ	CHK	Wed, Oct 20, 2010	23.32	23.72	23.27	23.43
4439	NASDAQ	CHK	Tue, Oct 19, 2010	23.76	23.88	22.99	23.22
4438	NASDAQ	CHK	Mon, Oct 18, 2010	24.29	24.35	23.84	23.99
4437	NASDAQ	CHK	Fri, Oct 15, 2010	24.40	24.50	23.98	24.31
4436	NASDAQ	CHK	Thu, Oct 14, 2010	24.62	24.74	24.07	24.27
4435	NASDAQ	CHK	Wed, Oct 13, 2010	25.26	25.32	24.27	24.57
4434	NASDAQ	CHK	Tue, Oct 12, 2010	25.44	25.55	25.01	25.24
4433	NASDAQ	CHK	Mon, Oct 11, 2010	25.64	25.71	24.56	24.63
4432	NASDAQ	CHK	Fri, Oct 8, 2010	23.77	24.51	23.55	24.37
4431	NASDAQ	CHK	Thu, Oct 7, 2010	24.05	24.05	23.52	23.77
4430	NASDAQ	CHK	Wed, Oct 6, 2010	23.61	24.05	23.58	23.88
4429	NASDAQ	CHK	Tue, Oct 5, 2010	23.85	24.09	23.45	23.60
4428	NASDAQ	CHK	Mon, Oct 4, 2010	24.12	24.13	23.34	23.55
4427	NASDAQ	CHK	Fri, Oct 1, 2010	24.23	24.42	23.95	24.10
4426	NASDAQ	CHK	Thu, Sep 30, 2010	23.96	24.32	23.49	23.95
4425	NASDAQ	CHK	Wed, Sep 29, 2010	22.78	23.95	22.75	23.85
4424	NASDAQ	CHK	Tue, Sep 28, 2010	22.94	23.01	22.49	22.93
4423	NASDAQ	CHK	Mon, Sep 27, 2010	22.74	23.03	22.68	22.90
4422	NASDAQ	CHK	Fri, Sep 24, 2010	22.38	22.84	22.13	22.79
4421	NASDAQ	CHK	Thu, Sep 23, 2010	21.98	22.41	21.93	22.09
4420	NASDAQ	CHK	Wed, Sep 22, 2010	22.46	22.64	22.07	22.12
4419	NASDAQ	CHK	Tue, Sep 21, 2010	22.87	23.05	22.33	22.39
4418	NASDAQ	CHK	Mon, Sep 20, 2010	22.72	23.05	22.49	22.98
4417	NASDAQ	CHK	Fri, Sep 17, 2010	23.03	23.04	22.58	22.69
4416	NASDAQ	CHK	Thu, Sep 16, 2010	22.57	23.07	22.52	22.87
4415	NASDAQ	CHK	Wed, Sep 15, 2010	22.55	22.70	22.34	22.66
4414	NASDAQ	CHK	Tue, Sep 14, 2010	22.86	22.98	22.58	22.72
4413	NASDAQ	CHK	Mon, Sep 13, 2010	22.62	22.90	22.35	22.90
4412	NASDAQ	CHK	Fri, Sep 10, 2010	22.19	22.46	22.13	22.41
4411	NASDAQ	CHK	Thu, Sep 9, 2010	22.65	22.66	22.03	22.11
4410	NASDAQ	CHK	Wed, Sep 8, 2010	22.42	22.65	22.16	22.33
4409	NASDAQ	CHK	Tue, Sep 7, 2010	22.79	22.81	22.37	22.49
4408	NASDAQ	CHK	Fri, Sep 3, 2010	22.73	23.06	22.61	22.96
4407	NASDAQ	CHK	Thu, Sep 2, 2010	22.49	22.60	22.02	22.60
4406	NASDAQ	CHK	Wed, Sep 1, 2010	22.19	22.60	22.06	22.46
4405	NASDAQ	CHK	Tue, Aug 31, 2010	21.80	22.28	21.73	21.86
4404	NASDAQ	CHK	Mon, Aug 30, 2010	22.00	22.52	21.96	22.02
4403	NASDAQ	CHK	Fri, Aug 27, 2010	21.41	22.04	21.13	22.00
4402	NASDAQ	CHK	Thu, Aug 26, 2010	21.20	21.73	21.15	21.22
4401	NASDAQ	CHK	Wed, Aug 25, 2010	21.17	21.30	20.81	21.19
4400	NASDAQ	CHK	Tue, Aug 24, 2010	21.38	21.91	21.13	21.39
4399	NASDAQ	CHK	Mon, Aug 23, 2010	21.54	21.97	21.49	21.76
4398	NASDAQ	CHK	Fri, Aug 20, 2010	21.83	21.92	21.51	21.55
4397	NASDAQ	CHK	Thu, Aug 19, 2010	22.02	22.14	21.83	22.00
4396	NASDAQ	CHK	Wed, Aug 18, 2010	22.51	22.52	22.03	22.07
4395	NASDAQ	CHK	Tue, Aug 17, 2010	22.22	22.64	22.15	22.54
4394	NASDAQ	CHK	Mon, Aug 16, 2010	22.00	22.25	21.87	22.13
4393	NASDAQ	CHK	Fri, Aug 13, 2010	22.19	22.58	21.97	21.97
4392	NASDAQ	CHK	Thu, Aug 12, 2010	22.20	22.52	21.98	22.24
4391	NASDAQ	CHK	Wed, Aug 11, 2010	23.18	23.21	22.52	22.64
4390	NASDAQ	CHK	Tue, Aug 10, 2010	22.96	23.64	22.85	23.51
4389	NASDAQ	CHK	Mon, Aug 9, 2010	23.68	23.79	23.14	23.27
4388	NASDAQ	CHK	Fri, Aug 6, 2010	23.35	23.66	23.17	23.57
4387	NASDAQ	CHK	Thu, Aug 5, 2010	23.58	23.89	23.33	23.65
4386	NASDAQ	CHK	Wed, Aug 4, 2010	23.47	23.79	23.26	23.72
4385	NASDAQ	CHK	Tue, Aug 3, 2010	22.89	23.36	22.73	23.08
4384	NASDAQ	CHK	Mon, Aug 2, 2010	22.62	23.07	22.38	22.90
4383	NASDAQ	CHK	Fri, Jul 30, 2010	22.04	22.37	21.94	22.23
4382	NASDAQ	CHK	Thu, Jul 29, 2010	22.61	22.62	21.95	22.31
4381	NASDAQ	CHK	Wed, Jul 28, 2010	22.58	22.67	22.12	22.33
4380	NASDAQ	CHK	Tue, Jul 27, 2010	23.44	23.44	22.12	22.50
4379	NASDAQ	CHK	Mon, Jul 26, 2010	23.18	23.30	22.91	23.24
4378	NASDAQ	CHK	Fri, Jul 23, 2010	22.84	23.10	22.42	23.06
4377	NASDAQ	CHK	Thu, Jul 22, 2010	22.75	23.12	22.62	22.94
4376	NASDAQ	CHK	Wed, Jul 21, 2010	23.10	23.10	22.20	22.35
4375	NASDAQ	CHK	Tue, Jul 20, 2010	21.82	22.89	21.81	22.74
4374	NASDAQ	CHK	Mon, Jul 19, 2010	21.84	22.28	21.76	22.14
4373	NASDAQ	CHK	Fri, Jul 16, 2010	22.53	22.53	21.91	22.06
4372	NASDAQ	CHK	Thu, Jul 15, 2010	22.69	22.73	22.09	22.67
4371	NASDAQ	CHK	Wed, Jul 14, 2010	22.53	22.88	22.31	22.64
4370	NASDAQ	CHK	Tue, Jul 13, 2010	22.87	23.02	22.62	22.64
4369	NASDAQ	CHK	Mon, Jul 12, 2010	22.71	22.75	22.13	22.48
4368	NASDAQ	CHK	Fri, Jul 9, 2010	22.76	22.86	22.47	22.71
4367	NASDAQ	CHK	Thu, Jul 8, 2010	22.90	22.96	22.25	22.67
4366	NASDAQ	CHK	Wed, Jul 7, 2010	21.83	22.72	21.73	22.65
4365	NASDAQ	CHK	Tue, Jul 6, 2010	22.20	22.42	21.50	21.72
4364	NASDAQ	CHK	Fri, Jul 2, 2010	22.20	22.43	21.47	21.68
4363	NASDAQ	CHK	Thu, Jul 1, 2010	22.10	22.39	21.55	22.01
4362	NASDAQ	CHK	Wed, Jun 30, 2010	22.70	22.94	22.10	22.15
4361	NASDAQ	CHK	Tue, Jun 29, 2010	23.21	23.28	22.28	22.49
4360	NASDAQ	CHK	Mon, Jun 28, 2010	24.42	24.42	23.65	23.73
4359	NASDAQ	CHK	Fri, Jun 25, 2010	24.26	24.62	23.87	24.29
4358	NASDAQ	CHK	Thu, Jun 24, 2010	24.78	24.92	24.05	24.19
4357	NASDAQ	CHK	Wed, Jun 23, 2010	25.03	25.11	24.51	24.83
4356	NASDAQ	CHK	Tue, Jun 22, 2010	25.88	25.95	24.84	25.01
4355	NASDAQ	CHK	Mon, Jun 21, 2010	26.52	26.92	25.67	25.89
4354	NASDAQ	CHK	Fri, Jun 18, 2010	26.29	26.37	25.93	26.02
4353	NASDAQ	CHK	Thu, Jun 17, 2010	26.77	26.77	25.97	26.30
4352	NASDAQ	CHK	Wed, Jun 16, 2010	26.56	26.82	26.17	26.62
4351	NASDAQ	CHK	Tue, Jun 15, 2010	26.54	26.89	26.31	26.81
4350	NASDAQ	CHK	Mon, Jun 14, 2010	26.36	27.01	25.98	26.03
4349	NASDAQ	CHK	Fri, Jun 11, 2010	25.58	26.11	25.51	26.05
4348	NASDAQ	CHK	Thu, Jun 10, 2010	25.46	26.15	25.30	25.81
4347	NASDAQ	CHK	Wed, Jun 9, 2010	25.72	26.22	24.59	24.78
4346	NASDAQ	CHK	Tue, Jun 8, 2010	25.46	25.74	24.73	25.36
4345	NASDAQ	CHK	Mon, Jun 7, 2010	25.81	26.41	25.21	25.32
4344	NASDAQ	CHK	Fri, Jun 4, 2010	25.69	26.92	25.24	25.47
4343	NASDAQ	CHK	Thu, Jun 3, 2010	24.70	26.42	24.25	26.28
4342	NASDAQ	CHK	Wed, Jun 2, 2010	23.10	24.68	22.99	24.65
4341	NASDAQ	CHK	Tue, Jun 1, 2010	23.28	23.84	22.80	22.86
4340	NASDAQ	CHK	Fri, May 28, 2010	23.54	24.05	23.26	23.62
4339	NASDAQ	CHK	Thu, May 27, 2010	22.84	23.52	22.78	23.49
4338	NASDAQ	CHK	Wed, May 26, 2010	22.14	22.70	22.06	22.37
4337	NASDAQ	CHK	Tue, May 25, 2010	21.27	22.03	20.74	21.98
4336	NASDAQ	CHK	Mon, May 24, 2010	22.12	22.55	21.91	21.94
4335	NASDAQ	CHK	Fri, May 21, 2010	21.63	22.44	21.25	22.21
4334	NASDAQ	CHK	Thu, May 20, 2010	22.64	22.89	22.20	22.22
4333	NASDAQ	CHK	Wed, May 19, 2010	23.30	23.73	22.77	23.36
4332	NASDAQ	CHK	Tue, May 18, 2010	23.82	24.15	23.36	23.52
4331	NASDAQ	CHK	Mon, May 17, 2010	23.92	24.15	22.95	23.57
4330	NASDAQ	CHK	Fri, May 14, 2010	24.37	24.37	23.45	23.91
4329	NASDAQ	CHK	Thu, May 13, 2010	24.81	25.31	24.50	24.62
4328	NASDAQ	CHK	Wed, May 12, 2010	24.98	25.25	24.55	24.88
4327	NASDAQ	CHK	Tue, May 11, 2010	24.34	25.33	24.26	24.61
4326	NASDAQ	CHK	Mon, May 10, 2010	24.27	24.49	23.92	24.42
4325	NASDAQ	CHK	Fri, May 7, 2010	23.57	24.06	22.55	23.16
4324	NASDAQ	CHK	Thu, May 6, 2010	24.29	24.56	22.20	23.76
4323	NASDAQ	CHK	Wed, May 5, 2010	24.72	25.16	24.05	24.50
4322	NASDAQ	CHK	Tue, May 4, 2010	25.34	25.34	24.71	24.97
4321	NASDAQ	CHK	Mon, May 3, 2010	25.36	25.69	25.01	25.46
4320	NASDAQ	CHK	Fri, Apr 30, 2010	25.05	25.66	24.69	25.16
4319	NASDAQ	CHK	Thu, Apr 29, 2010	25.26	25.48	24.43	24.96
4318	NASDAQ	CHK	Wed, Apr 28, 2010	25.18	25.30	24.77	25.08
4317	NASDAQ	CHK	Tue, Apr 27, 2010	25.66	25.82	24.91	25.00
4316	NASDAQ	CHK	Mon, Apr 26, 2010	26.26	26.37	25.84	25.87
4315	NASDAQ	CHK	Fri, Apr 23, 2010	25.24	26.34	24.84	26.31
4314	NASDAQ	CHK	Thu, Apr 22, 2010	24.76	25.32	24.63	25.25
4313	NASDAQ	CHK	Wed, Apr 21, 2010	25.28	25.32	24.91	25.03
4312	NASDAQ	CHK	Tue, Apr 20, 2010	25.17	25.45	25.17	25.24
4311	NASDAQ	CHK	Mon, Apr 19, 2010	24.98	25.20	24.77	25.11
4310	NASDAQ	CHK	Fri, Apr 16, 2010	25.63	25.72	25.11	25.25
4309	NASDAQ	CHK	Thu, Apr 15, 2010	25.95	26.04	25.70	25.76
4308	NASDAQ	CHK	Wed, Apr 14, 2010	26.06	26.11	25.72	26.09
4307	NASDAQ	CHK	Tue, Apr 13, 2010	25.83	26.11	25.28	25.98
4306	NASDAQ	CHK	Mon, Apr 12, 2010	25.98	26.34	25.64	25.72
4305	NASDAQ	CHK	Fri, Apr 9, 2010	25.94	26.04	25.62	25.97
4304	NASDAQ	CHK	Thu, Apr 8, 2010	25.18	25.54	24.99	25.49
4303	NASDAQ	CHK	Wed, Apr 7, 2010	25.81	25.90	25.29	25.47
4302	NASDAQ	CHK	Tue, Apr 6, 2010	25.94	26.10	25.70	25.92
4301	NASDAQ	CHK	Mon, Apr 5, 2010	25.84	26.11	25.55	25.99
4300	NASDAQ	CHK	Thu, Apr 1, 2010	25.31	25.69	25.07	25.50
4299	NASDAQ	CHK	Wed, Mar 31, 2010	24.87	25.44	24.78	24.99
4298	NASDAQ	CHK	Tue, Mar 30, 2010	24.61	24.84	24.15	24.78
4297	NASDAQ	CHK	Mon, Mar 29, 2010	24.00	24.69	23.86	24.61
4296	NASDAQ	CHK	Fri, Mar 26, 2010	23.77	23.86	23.36	23.65
4295	NASDAQ	CHK	Thu, Mar 25, 2010	24.69	24.74	23.66	23.71
4294	NASDAQ	CHK	Wed, Mar 24, 2010	24.38	25.03	24.32	24.43
4293	NASDAQ	CHK	Tue, Mar 23, 2010	24.68	24.81	24.27	24.60
4292	NASDAQ	CHK	Mon, Mar 22, 2010	25.10	25.11	24.51	24.57
4291	NASDAQ	CHK	Fri, Mar 19, 2010	25.45	25.83	24.74	25.60
4290	NASDAQ	CHK	Thu, Mar 18, 2010	26.23	26.35	25.11	25.15
4289	NASDAQ	CHK	Wed, Mar 17, 2010	26.92	27.01	26.39	26.48
4288	NASDAQ	CHK	Tue, Mar 16, 2010	26.90	27.01	26.62	26.87
4287	NASDAQ	CHK	Mon, Mar 15, 2010	26.84	26.99	26.36	26.87
4286	NASDAQ	CHK	Fri, Mar 12, 2010	27.40	27.47	26.92	27.11
4285	NASDAQ	CHK	Thu, Mar 11, 2010	27.08	27.34	26.90	27.27
4284	NASDAQ	CHK	Wed, Mar 10, 2010	27.38	27.43	26.83	27.13
4283	NASDAQ	CHK	Tue, Mar 9, 2010	26.91	27.74	26.77	27.17
4282	NASDAQ	CHK	Mon, Mar 8, 2010	27.66	27.86	26.94	27.05
4281	NASDAQ	CHK	Fri, Mar 5, 2010	27.89	28.02	27.67	27.82
4280	NASDAQ	CHK	Thu, Mar 4, 2010	28.29	28.45	27.52	27.69
4279	NASDAQ	CHK	Wed, Mar 3, 2010	28.41	28.56	28.20	28.33
4278	NASDAQ	CHK	Tue, Mar 2, 2010	28.45	28.72	28.21	28.27
4277	NASDAQ	CHK	Mon, Mar 1, 2010	28.26	28.38	27.98	28.21
4276	NASDAQ	CHK	Fri, Feb 26, 2010	28.33	28.42	27.78	28.09
4275	NASDAQ	CHK	Thu, Feb 25, 2010	27.64	28.28	27.32	28.26
4274	NASDAQ	CHK	Wed, Feb 24, 2010	28.00	28.22	27.75	28.06
4273	NASDAQ	CHK	Tue, Feb 23, 2010	28.45	28.45	27.76	27.80
4272	NASDAQ	CHK	Mon, Feb 22, 2010	29.34	29.38	28.49	28.65
4271	NASDAQ	CHK	Fri, Feb 19, 2010	28.88	29.40	28.83	29.17
4270	NASDAQ	CHK	Thu, Feb 18, 2010	28.67	29.14	28.39	29.03
4269	NASDAQ	CHK	Wed, Feb 17, 2010	27.71	27.95	27.15	27.87
4268	NASDAQ	CHK	Tue, Feb 16, 2010	27.02	27.48	26.94	27.31
4267	NASDAQ	CHK	Fri, Feb 12, 2010	26.05	26.60	25.70	26.39
4266	NASDAQ	CHK	Thu, Feb 11, 2010	25.79	26.61	25.64	26.57
4265	NASDAQ	CHK	Wed, Feb 10, 2010	25.75	26.08	25.21	25.80
4264	NASDAQ	CHK	Tue, Feb 9, 2010	26.09	26.29	25.39	25.91
4263	NASDAQ	CHK	Mon, Feb 8, 2010	26.12	26.40	25.53	25.63
4262	NASDAQ	CHK	Fri, Feb 5, 2010	25.62	26.24	24.91	25.92
4261	NASDAQ	CHK	Thu, Feb 4, 2010	26.74	26.79	25.51	25.56
4260	NASDAQ	CHK	Wed, Feb 3, 2010	27.66	27.95	27.15	27.31
4259	NASDAQ	CHK	Tue, Feb 2, 2010	27.51	27.84	27.05	27.75
4258	NASDAQ	CHK	Mon, Feb 1, 2010	26.52	27.39	26.52	27.34
4257	NASDAQ	CHK	Fri, Jan 29, 2010	27.17	27.56	26.05	26.20
4256	NASDAQ	CHK	Thu, Jan 28, 2010	27.10	27.34	26.46	26.97
4255	NASDAQ	CHK	Wed, Jan 27, 2010	28.00	28.06	26.71	27.41
4254	NASDAQ	CHK	Tue, Jan 26, 2010	28.17	28.67	27.83	28.05
4253	NASDAQ	CHK	Mon, Jan 25, 2010	28.42	28.93	28.25	28.50
4252	NASDAQ	CHK	Fri, Jan 22, 2010	28.60	29.26	28.00	28.14
4251	NASDAQ	CHK	Thu, Jan 21, 2010	29.51	29.87	28.72	28.74
4250	NASDAQ	CHK	Wed, Jan 20, 2010	29.39	29.46	28.93	29.24
4249	NASDAQ	CHK	Tue, Jan 19, 2010	29.25	29.88	29.07	29.82
4248	NASDAQ	CHK	Fri, Jan 15, 2010	29.09	29.70	28.81	29.51
4247	NASDAQ	CHK	Thu, Jan 14, 2010	29.62	30.00	29.09	29.25
4246	NASDAQ	CHK	Wed, Jan 13, 2010	28.99	29.54	28.46	29.41
4245	NASDAQ	CHK	Tue, Jan 12, 2010	29.08	29.28	28.72	29.16
4244	NASDAQ	CHK	Mon, Jan 11, 2010	30.64	30.64	29.32	29.60
4243	NASDAQ	CHK	Fri, Jan 8, 2010	30.01	30.57	29.66	30.56
4242	NASDAQ	CHK	Thu, Jan 7, 2010	30.27	30.45	29.79	30.36
4241	NASDAQ	CHK	Wed, Jan 6, 2010	30.88	30.89	30.16	30.29
4240	NASDAQ	CHK	Tue, Jan 5, 2010	29.92	30.79	29.81	30.63
4239	NASDAQ	CHK	Mon, Jan 4, 2010	29.00	29.72	28.46	29.70
4238	NASDAQ	CHK	Thu, Dec 31, 2009	27.87	28.10	27.26	27.36
4237	NASDAQ	CHK	Wed, Dec 30, 2009	27.91	28.27	27.77	27.87
4236	NASDAQ	CHK	Tue, Dec 29, 2009	29.14	29.50	28.24	28.26
4235	NASDAQ	CHK	Mon, Dec 28, 2009	29.77	29.85	28.78	29.17
4234	NASDAQ	CHK	Thu, Dec 24, 2009	29.15	29.69	29.11	29.42
4233	NASDAQ	CHK	Wed, Dec 23, 2009	28.57	29.06	28.38	28.88
4232	NASDAQ	CHK	Tue, Dec 22, 2009	28.23	28.47	27.92	28.34
4231	NASDAQ	CHK	Mon, Dec 21, 2009	28.22	28.28	27.87	27.89
4230	NASDAQ	CHK	Fri, Dec 18, 2009	26.96	27.89	26.96	27.55
4229	NASDAQ	CHK	Thu, Dec 17, 2009	26.20	26.72	25.82	26.43
4228	NASDAQ	CHK	Wed, Dec 16, 2009	26.24	26.54	26.02	26.34
4227	NASDAQ	CHK	Tue, Dec 15, 2009	25.88	26.22	25.72	25.94
4226	NASDAQ	CHK	Mon, Dec 14, 2009	26.22	26.23	25.56	25.76
4225	NASDAQ	CHK	Fri, Dec 11, 2009	24.61	24.80	24.21	24.35
4224	NASDAQ	CHK	Thu, Dec 10, 2009	23.96	24.63	23.79	24.50
4223	NASDAQ	CHK	Wed, Dec 9, 2009	24.13	24.17	23.32	23.72
4222	NASDAQ	CHK	Tue, Dec 8, 2009	24.23	24.29	23.70	23.84
4221	NASDAQ	CHK	Mon, Dec 7, 2009	24.05	24.71	23.95	24.10
4220	NASDAQ	CHK	Fri, Dec 4, 2009	24.79	24.90	23.47	23.86
4219	NASDAQ	CHK	Thu, Dec 3, 2009	24.90	24.90	24.27	24.35
4218	NASDAQ	CHK	Wed, Dec 2, 2009	25.43	25.43	24.52	24.74
4217	NASDAQ	CHK	Tue, Dec 1, 2009	25.68	25.99	25.37	25.48
4216	NASDAQ	CHK	Mon, Nov 30, 2009	25.37	26.03	25.06	25.29
4215	NASDAQ	CHK	Fri, Nov 27, 2009	25.18	25.89	24.84	25.55
4214	NASDAQ	CHK	Wed, Nov 25, 2009	25.18	26.38	24.77	26.28
4213	NASDAQ	CHK	Tue, Nov 24, 2009	24.52	25.05	24.08	25.00
4212	NASDAQ	CHK	Mon, Nov 23, 2009	24.98	25.15	24.42	24.53
4211	NASDAQ	CHK	Fri, Nov 20, 2009	24.53	24.71	24.07	24.35
4210	NASDAQ	CHK	Thu, Nov 19, 2009	25.28	25.31	24.52	24.72
4209	NASDAQ	CHK	Wed, Nov 18, 2009	26.01	26.08	25.16	25.46
4208	NASDAQ	CHK	Tue, Nov 17, 2009	26.54	26.56	25.58	25.69
4207	NASDAQ	CHK	Mon, Nov 16, 2009	26.72	27.08	26.39	26.58
4206	NASDAQ	CHK	Fri, Nov 13, 2009	26.29	26.64	25.98	26.46
4205	NASDAQ	CHK	Thu, Nov 12, 2009	26.61	27.16	26.01	26.12
4204	NASDAQ	CHK	Wed, Nov 11, 2009	27.12	27.29	26.45	26.62
4203	NASDAQ	CHK	Tue, Nov 10, 2009	26.59	26.87	26.23	26.79
4202	NASDAQ	CHK	Mon, Nov 9, 2009	26.24	26.80	26.15	26.71
4201	NASDAQ	CHK	Fri, Nov 6, 2009	25.82	26.38	25.42	25.61
4200	NASDAQ	CHK	Thu, Nov 5, 2009	25.91	26.37	25.38	26.24
4199	NASDAQ	CHK	Wed, Nov 4, 2009	26.42	26.64	25.62	25.74
4198	NASDAQ	CHK	Tue, Nov 3, 2009	24.98	26.29	24.45	25.91
4197	NASDAQ	CHK	Mon, Nov 2, 2009	26.19	26.59	25.16	25.52
4196	NASDAQ	CHK	Fri, Oct 30, 2009	27.43	27.43	25.37	25.90
4195	NASDAQ	CHK	Thu, Oct 29, 2009	26.59	27.54	26.29	27.53
4194	NASDAQ	CHK	Wed, Oct 28, 2009	27.63	27.63	26.12	26.19
4193	NASDAQ	CHK	Tue, Oct 27, 2009	27.35	28.40	27.17	27.85
4192	NASDAQ	CHK	Mon, Oct 26, 2009	28.42	29.17	27.18	27.20
4191	NASDAQ	CHK	Fri, Oct 23, 2009	29.83	29.95	28.07	28.26
4190	NASDAQ	CHK	Thu, Oct 22, 2009	29.97	30.24	28.98	29.54
4189	NASDAQ	CHK	Wed, Oct 21, 2009	30.13	31.38	30.03	30.48
4188	NASDAQ	CHK	Tue, Oct 20, 2009	30.80	30.92	29.60	30.50
4187	NASDAQ	CHK	Mon, Oct 19, 2009	30.53	30.71	30.26	30.63
4186	NASDAQ	CHK	Fri, Oct 16, 2009	30.30	30.70	30.14	30.31
4185	NASDAQ	CHK	Thu, Oct 15, 2009	30.07	30.86	29.94	30.59
4184	NASDAQ	CHK	Wed, Oct 14, 2009	31.70	31.72	29.91	30.12
4183	NASDAQ	CHK	Tue, Oct 13, 2009	30.92	31.45	30.23	31.15
4182	NASDAQ	CHK	Mon, Oct 12, 2009	30.42	30.91	30.42	30.67
4181	NASDAQ	CHK	Fri, Oct 9, 2009	29.79	30.45	29.64	30.30
4180	NASDAQ	CHK	Thu, Oct 8, 2009	29.57	29.98	29.05	29.90
4179	NASDAQ	CHK	Wed, Oct 7, 2009	29.23	29.66	28.63	29.17
4178	NASDAQ	CHK	Tue, Oct 6, 2009	29.05	29.57	28.68	29.33
4177	NASDAQ	CHK	Mon, Oct 5, 2009	28.48	29.21	28.34	29.07
4176	NASDAQ	CHK	Fri, Oct 2, 2009	27.21	28.34	26.73	28.23
4175	NASDAQ	CHK	Thu, Oct 1, 2009	29.93	30.03	27.94	28.02
4174	NASDAQ	CHK	Wed, Sep 30, 2009	30.45	30.60	29.41	30.03
4173	NASDAQ	CHK	Tue, Sep 29, 2009	29.52	30.49	29.35	30.23
4172	NASDAQ	CHK	Mon, Sep 28, 2009	29.13	29.92	28.91	29.78
4171	NASDAQ	CHK	Fri, Sep 25, 2009	29.19	29.73	28.86	29.11
4170	NASDAQ	CHK	Thu, Sep 24, 2009	29.97	30.09	28.58	29.41
4169	NASDAQ	CHK	Wed, Sep 23, 2009	30.83	30.96	29.83	29.92
4168	NASDAQ	CHK	Tue, Sep 22, 2009	30.20	31.18	30.15	30.78
4167	NASDAQ	CHK	Mon, Sep 21, 2009	28.90	29.80	28.09	29.72
4166	NASDAQ	CHK	Fri, Sep 18, 2009	29.80	29.97	28.83	29.44
4165	NASDAQ	CHK	Thu, Sep 17, 2009	30.33	30.87	29.09	29.57
4164	NASDAQ	CHK	Wed, Sep 16, 2009	30.46	30.65	29.62	30.57
4163	NASDAQ	CHK	Tue, Sep 15, 2009	29.34	30.13	29.20	29.93
4162	NASDAQ	CHK	Mon, Sep 14, 2009	27.06	28.71	26.82	28.64
4161	NASDAQ	CHK	Fri, Sep 11, 2009	27.35	28.65	27.03	27.61
4160	NASDAQ	CHK	Thu, Sep 10, 2009	25.07	26.86	25.02	26.69
4159	NASDAQ	CHK	Wed, Sep 9, 2009	24.69	25.53	24.42	25.00
4158	NASDAQ	CHK	Tue, Sep 8, 2009	24.14	24.74	24.03	24.41
4157	NASDAQ	CHK	Fri, Sep 4, 2009	22.86	23.54	22.84	23.47
4156	NASDAQ	CHK	Thu, Sep 3, 2009	23.64	23.78	22.68	22.81
4155	NASDAQ	CHK	Wed, Sep 2, 2009	23.66	24.00	23.40	23.40
4154	NASDAQ	CHK	Tue, Sep 1, 2009	23.98	24.76	23.77	23.79
4153	NASDAQ	CHK	Mon, Aug 31, 2009	24.51	24.58	23.97	24.15
4152	NASDAQ	CHK	Fri, Aug 28, 2009	24.79	24.95	24.36	24.94
4151	NASDAQ	CHK	Thu, Aug 27, 2009	24.50	24.55	23.79	24.53
4150	NASDAQ	CHK	Wed, Aug 26, 2009	24.39	24.79	24.09	24.64
4149	NASDAQ	CHK	Tue, Aug 25, 2009	25.47	25.62	24.64	24.69
4148	NASDAQ	CHK	Mon, Aug 24, 2009	25.37	25.75	25.20	25.31
4147	NASDAQ	CHK	Fri, Aug 21, 2009	24.74	25.31	24.62	25.15
4146	NASDAQ	CHK	Thu, Aug 20, 2009	24.28	24.93	24.17	24.34
4145	NASDAQ	CHK	Wed, Aug 19, 2009	23.44	24.57	23.24	24.28
4144	NASDAQ	CHK	Tue, Aug 18, 2009	23.69	24.05	23.59	23.85
4143	NASDAQ	CHK	Mon, Aug 17, 2009	24.07	24.28	23.36	23.52
4142	NASDAQ	CHK	Fri, Aug 14, 2009	25.88	25.91	24.66	25.01
4141	NASDAQ	CHK	Thu, Aug 13, 2009	25.39	26.15	24.87	25.80
4140	NASDAQ	CHK	Wed, Aug 12, 2009	24.92	25.39	23.95	24.99
4139	NASDAQ	CHK	Tue, Aug 11, 2009	25.79	25.86	24.82	25.14
4138	NASDAQ	CHK	Mon, Aug 10, 2009	25.68	26.16	25.57	25.89
4137	NASDAQ	CHK	Fri, Aug 7, 2009	26.36	26.41	25.73	25.84
4136	NASDAQ	CHK	Thu, Aug 6, 2009	25.90	26.28	25.32	25.84
4135	NASDAQ	CHK	Wed, Aug 5, 2009	24.83	25.35	24.37	24.64
4134	NASDAQ	CHK	Tue, Aug 4, 2009	23.67	24.88	23.49	24.60
4133	NASDAQ	CHK	Mon, Aug 3, 2009	23.30	23.82	23.12	23.64
4132	NASDAQ	CHK	Fri, Jul 31, 2009	22.37	23.09	22.36	22.67
4131	NASDAQ	CHK	Thu, Jul 30, 2009	22.31	22.77	22.09	22.55
4130	NASDAQ	CHK	Wed, Jul 29, 2009	21.62	21.91	21.38	21.76
4129	NASDAQ	CHK	Tue, Jul 28, 2009	22.47	22.51	21.59	22.19
4128	NASDAQ	CHK	Mon, Jul 27, 2009	22.92	23.09	22.35	22.76
4127	NASDAQ	CHK	Fri, Jul 24, 2009	22.20	22.53	22.03	22.51
4126	NASDAQ	CHK	Thu, Jul 23, 2009	21.58	22.42	21.51	22.36
4125	NASDAQ	CHK	Wed, Jul 22, 2009	21.29	21.87	21.14	21.55
4124	NASDAQ	CHK	Tue, Jul 21, 2009	21.80	22.15	21.24	21.70
4123	NASDAQ	CHK	Mon, Jul 20, 2009	21.64	21.88	21.22	21.54
4122	NASDAQ	CHK	Fri, Jul 17, 2009	20.81	21.57	20.59	21.27
4121	NASDAQ	CHK	Thu, Jul 16, 2009	20.04	21.12	19.95	20.95
4120	NASDAQ	CHK	Wed, Jul 15, 2009	19.89	20.48	19.87	20.31
4119	NASDAQ	CHK	Tue, Jul 14, 2009	19.51	19.69	19.21	19.51
4118	NASDAQ	CHK	Mon, Jul 13, 2009	18.87	19.28	18.40	19.27
4117	NASDAQ	CHK	Fri, Jul 10, 2009	18.55	18.96	18.26	18.87
4116	NASDAQ	CHK	Thu, Jul 9, 2009	18.60	19.24	18.60	18.96
4115	NASDAQ	CHK	Wed, Jul 8, 2009	18.58	19.03	17.89	18.39
4114	NASDAQ	CHK	Tue, Jul 7, 2009	18.95	19.08	18.42	18.61
4113	NASDAQ	CHK	Mon, Jul 6, 2009	19.16	19.16	18.08	18.96
4112	NASDAQ	CHK	Thu, Jul 2, 2009	20.47	20.49	19.63	19.75
4111	NASDAQ	CHK	Wed, Jul 1, 2009	21.49	21.64	20.76	20.80
4110	NASDAQ	CHK	Tue, Jun 30, 2009	20.85	21.33	20.57	20.96
4109	NASDAQ	CHK	Mon, Jun 29, 2009	21.04	21.04	20.52	20.57
4108	NASDAQ	CHK	Fri, Jun 26, 2009	20.71	20.98	20.40	20.76
4107	NASDAQ	CHK	Thu, Jun 25, 2009	20.72	20.78	20.17	20.73
4106	NASDAQ	CHK	Wed, Jun 24, 2009	20.62	21.09	20.40	20.68
4105	NASDAQ	CHK	Tue, Jun 23, 2009	20.66	20.73	19.85	20.37
4104	NASDAQ	CHK	Mon, Jun 22, 2009	21.43	21.48	20.40	20.47
4103	NASDAQ	CHK	Fri, Jun 19, 2009	23.30	23.42	22.05	22.15
4102	NASDAQ	CHK	Thu, Jun 18, 2009	23.51	23.79	22.86	23.10
4101	NASDAQ	CHK	Wed, Jun 17, 2009	23.60	23.79	22.54	23.41
4100	NASDAQ	CHK	Tue, Jun 16, 2009	24.90	25.05	23.63	23.83
4099	NASDAQ	CHK	Mon, Jun 15, 2009	24.89	25.16	24.00	24.29
4098	NASDAQ	CHK	Fri, Jun 12, 2009	25.23	25.46	24.71	25.20
4097	NASDAQ	CHK	Thu, Jun 11, 2009	25.43	26.07	25.15	25.70
4096	NASDAQ	CHK	Wed, Jun 10, 2009	24.66	25.46	24.55	25.29
4095	NASDAQ	CHK	Tue, Jun 9, 2009	24.55	24.69	23.67	24.19
4094	NASDAQ	CHK	Mon, Jun 8, 2009	24.29	24.44	23.47	24.23
4093	NASDAQ	CHK	Fri, Jun 5, 2009	25.42	25.48	24.32	24.61
4092	NASDAQ	CHK	Thu, Jun 4, 2009	24.49	24.91	24.07	24.73
4091	NASDAQ	CHK	Wed, Jun 3, 2009	24.88	24.97	23.68	23.99
4090	NASDAQ	CHK	Tue, Jun 2, 2009	25.67	25.68	24.93	25.47
4089	NASDAQ	CHK	Mon, Jun 1, 2009	24.63	26.04	24.57	25.92
4088	NASDAQ	CHK	Fri, May 29, 2009	24.15	24.42	23.49	23.96
4087	NASDAQ	CHK	Thu, May 28, 2009	22.40	23.72	21.97	23.55
4086	NASDAQ	CHK	Wed, May 27, 2009	22.31	22.65	21.91	22.02
4085	NASDAQ	CHK	Tue, May 26, 2009	21.24	22.18	20.72	22.13
4084	NASDAQ	CHK	Fri, May 22, 2009	22.10	22.20	21.48	21.67
4083	NASDAQ	CHK	Thu, May 21, 2009	22.74	22.88	21.61	22.06
4082	NASDAQ	CHK	Wed, May 20, 2009	23.36	24.21	23.05	23.24
4081	NASDAQ	CHK	Tue, May 19, 2009	22.29	23.52	22.29	22.89
4080	NASDAQ	CHK	Mon, May 18, 2009	21.56	22.35	21.36	22.29
4079	NASDAQ	CHK	Fri, May 15, 2009	21.77	22.04	20.82	21.09
4078	NASDAQ	CHK	Thu, May 14, 2009	21.45	22.19	20.93	21.91
4077	NASDAQ	CHK	Wed, May 13, 2009	22.94	23.03	21.45	21.62
4076	NASDAQ	CHK	Tue, May 12, 2009	24.66	24.69	22.67	23.45
4075	NASDAQ	CHK	Mon, May 11, 2009	24.57	24.70	23.47	23.67
4074	NASDAQ	CHK	Fri, May 8, 2009	23.52	25.64	23.52	25.20
4073	NASDAQ	CHK	Thu, May 7, 2009	23.54	24.33	22.54	23.17
4072	NASDAQ	CHK	Wed, May 6, 2009	22.20	22.93	21.75	22.61
4071	NASDAQ	CHK	Tue, May 5, 2009	22.43	23.35	21.18	21.57
4070	NASDAQ	CHK	Mon, May 4, 2009	22.31	24.13	22.22	24.13
4069	NASDAQ	CHK	Fri, May 1, 2009	20.84	22.20	20.78	22.09
4068	NASDAQ	CHK	Thu, Apr 30, 2009	21.27	21.81	20.51	20.84
4067	NASDAQ	CHK	Wed, Apr 29, 2009	21.31	21.54	20.83	21.09
4066	NASDAQ	CHK	Tue, Apr 28, 2009	20.91	21.36	20.53	21.02
4065	NASDAQ	CHK	Mon, Apr 27, 2009	21.30	21.56	20.84	21.45
4064	NASDAQ	CHK	Fri, Apr 24, 2009	21.35	22.28	21.18	21.99
4063	NASDAQ	CHK	Thu, Apr 23, 2009	20.73	21.29	20.65	21.07
4062	NASDAQ	CHK	Wed, Apr 22, 2009	20.39	21.08	20.07	20.50
4061	NASDAQ	CHK	Tue, Apr 21, 2009	20.13	21.20	19.77	20.80
4060	NASDAQ	CHK	Mon, Apr 20, 2009	22.16	22.19	20.37	20.69
4059	NASDAQ	CHK	Fri, Apr 17, 2009	21.82	23.05	21.82	22.87
4058	NASDAQ	CHK	Thu, Apr 16, 2009	22.53	22.61	21.80	22.14
4057	NASDAQ	CHK	Wed, Apr 15, 2009	21.97	22.58	21.90	22.13
4056	NASDAQ	CHK	Tue, Apr 14, 2009	21.52	23.12	21.51	22.19
4055	NASDAQ	CHK	Mon, Apr 13, 2009	21.27	22.11	20.64	21.93
4054	NASDAQ	CHK	Thu, Apr 9, 2009	21.63	22.22	21.31	21.88
4053	NASDAQ	CHK	Wed, Apr 8, 2009	19.98	21.37	19.65	20.61
4052	NASDAQ	CHK	Tue, Apr 7, 2009	20.37	20.37	19.62	19.63
4051	NASDAQ	CHK	Mon, Apr 6, 2009	20.44	21.00	20.33	20.94
4050	NASDAQ	CHK	Fri, Apr 3, 2009	19.97	21.44	19.62	21.09
4049	NASDAQ	CHK	Thu, Apr 2, 2009	19.26	20.43	19.21	19.93
4048	NASDAQ	CHK	Wed, Apr 1, 2009	17.59	18.79	17.37	18.55
4047	NASDAQ	CHK	Tue, Mar 31, 2009	18.66	18.85	17.91	18.04
4046	NASDAQ	CHK	Mon, Mar 30, 2009	18.64	18.92	17.95	18.44
4045	NASDAQ	CHK	Fri, Mar 27, 2009	19.59	19.87	19.23	19.39
4044	NASDAQ	CHK	Thu, Mar 26, 2009	20.77	21.21	19.80	20.09
4043	NASDAQ	CHK	Wed, Mar 25, 2009	20.80	21.28	19.59	20.40
4042	NASDAQ	CHK	Tue, Mar 24, 2009	20.30	21.18	19.58	20.58
4041	NASDAQ	CHK	Mon, Mar 23, 2009	19.29	20.68	19.14	20.62
4040	NASDAQ	CHK	Fri, Mar 20, 2009	19.27	19.91	18.52	18.65
4039	NASDAQ	CHK	Thu, Mar 19, 2009	19.18	19.96	18.78	19.00
4038	NASDAQ	CHK	Wed, Mar 18, 2009	17.71	18.86	17.05	18.51
4037	NASDAQ	CHK	Tue, Mar 17, 2009	17.01	17.99	16.70	17.93
4036	NASDAQ	CHK	Mon, Mar 16, 2009	16.31	17.44	16.12	16.81
4035	NASDAQ	CHK	Fri, Mar 13, 2009	16.99	17.08	16.16	16.34
4034	NASDAQ	CHK	Thu, Mar 12, 2009	16.50	16.86	15.86	16.82
4033	NASDAQ	CHK	Wed, Mar 11, 2009	15.81	16.76	15.75	16.50
4032	NASDAQ	CHK	Tue, Mar 10, 2009	15.49	16.05	15.28	15.62
4031	NASDAQ	CHK	Mon, Mar 9, 2009	14.72	15.70	14.48	14.86
4030	NASDAQ	CHK	Fri, Mar 6, 2009	15.39	16.02	14.25	14.86
4029	NASDAQ	CHK	Thu, Mar 5, 2009	15.13	16.20	14.92	15.29
4028	NASDAQ	CHK	Wed, Mar 4, 2009	15.44	15.88	15.23	15.60
4027	NASDAQ	CHK	Tue, Mar 3, 2009	14.60	15.34	14.03	14.78
4026	NASDAQ	CHK	Mon, Mar 2, 2009	16.01	16.34	14.16	14.27
4025	NASDAQ	CHK	Fri, Feb 27, 2009	16.03	17.02	15.66	16.53
4024	NASDAQ	CHK	Thu, Feb 26, 2009	17.43	17.87	15.74	16.32
4023	NASDAQ	CHK	Wed, Feb 25, 2009	16.61	17.44	15.86	16.96
4022	NASDAQ	CHK	Tue, Feb 24, 2009	16.05	16.71	15.55	16.48
4021	NASDAQ	CHK	Mon, Feb 23, 2009	17.24	17.27	15.62	15.69
4020	NASDAQ	CHK	Fri, Feb 20, 2009	17.14	17.53	16.27	16.60
4019	NASDAQ	CHK	Thu, Feb 19, 2009	17.92	18.16	17.18	17.68
4018	NASDAQ	CHK	Wed, Feb 18, 2009	17.88	18.18	16.70	17.32
4017	NASDAQ	CHK	Tue, Feb 17, 2009	18.74	18.87	17.94	18.10
4016	NASDAQ	CHK	Fri, Feb 13, 2009	19.35	20.11	19.29	19.66
4015	NASDAQ	CHK	Thu, Feb 12, 2009	18.64	19.58	18.33	19.48
4014	NASDAQ	CHK	Wed, Feb 11, 2009	19.17	19.58	18.44	19.06
4013	NASDAQ	CHK	Tue, Feb 10, 2009	19.97	20.62	18.77	19.02
4012	NASDAQ	CHK	Mon, Feb 9, 2009	19.81	20.40	19.66	19.95
4011	NASDAQ	CHK	Fri, Feb 6, 2009	18.66	19.41	18.46	19.15
4010	NASDAQ	CHK	Thu, Feb 5, 2009	17.95	19.00	17.55	18.91
4009	NASDAQ	CHK	Wed, Feb 4, 2009	17.70	18.33	17.50	18.07
4008	NASDAQ	CHK	Tue, Feb 3, 2009	16.87	17.53	16.65	17.42
4007	NASDAQ	CHK	Mon, Feb 2, 2009	16.39	16.90	15.93	16.66
4006	NASDAQ	CHK	Fri, Jan 30, 2009	18.14	18.14	16.57	16.71
4005	NASDAQ	CHK	Thu, Jan 29, 2009	17.11	18.15	16.97	17.66
4004	NASDAQ	CHK	Wed, Jan 28, 2009	16.57	18.11	16.47	17.71
4003	NASDAQ	CHK	Tue, Jan 27, 2009	16.75	17.06	16.03	16.53
4002	NASDAQ	CHK	Mon, Jan 26, 2009	15.65	17.17	15.59	16.70
4001	NASDAQ	CHK	Fri, Jan 23, 2009	14.47	15.84	14.27	15.75
4000	NASDAQ	CHK	Thu, Jan 22, 2009	15.62	15.62	14.55	15.01
3999	NASDAQ	CHK	Wed, Jan 21, 2009	15.10	16.08	14.61	16.00
3998	NASDAQ	CHK	Tue, Jan 20, 2009	15.85	16.29	14.48	14.53
3997	NASDAQ	CHK	Fri, Jan 16, 2009	16.82	17.00	15.75	16.13
3996	NASDAQ	CHK	Thu, Jan 15, 2009	16.08	16.44	14.36	15.54
3995	NASDAQ	CHK	Wed, Jan 14, 2009	16.78	16.87	16.00	16.29
3994	NASDAQ	CHK	Tue, Jan 13, 2009	16.90	17.69	16.65	17.18
3993	NASDAQ	CHK	Mon, Jan 12, 2009	17.21	17.38	16.73	16.97
3992	NASDAQ	CHK	Fri, Jan 9, 2009	18.77	18.78	17.49	17.63
3991	NASDAQ	CHK	Thu, Jan 8, 2009	18.83	19.29	18.43	18.62
3990	NASDAQ	CHK	Wed, Jan 7, 2009	19.48	20.30	18.87	19.34
3989	NASDAQ	CHK	Tue, Jan 6, 2009	20.14	20.91	19.82	20.18
3988	NASDAQ	CHK	Mon, Jan 5, 2009	18.61	19.74	18.25	19.17
3987	NASDAQ	CHK	Fri, Jan 2, 2009	17.17	18.35	17.01	18.26
3986	NASDAQ	CHK	Wed, Dec 31, 2008	16.22	17.35	16.10	17.10
3985	NASDAQ	CHK	Tue, Dec 30, 2008	16.23	16.58	15.91	16.55
3984	NASDAQ	CHK	Mon, Dec 29, 2008	16.84	16.84	15.94	16.49
3983	NASDAQ	CHK	Fri, Dec 26, 2008	16.00	16.57	15.82	16.28
3982	NASDAQ	CHK	Wed, Dec 24, 2008	16.02	16.16	15.65	16.05
3981	NASDAQ	CHK	Tue, Dec 23, 2008	16.55	16.81	15.86	16.11
3980	NASDAQ	CHK	Mon, Dec 22, 2008	16.88	16.93	15.59	16.51
3979	NASDAQ	CHK	Fri, Dec 19, 2008	16.77	17.40	16.60	16.88
3978	NASDAQ	CHK	Thu, Dec 18, 2008	17.13	17.34	16.49	16.67
3977	NASDAQ	CHK	Wed, Dec 17, 2008	17.15	17.94	16.98	17.01
3976	NASDAQ	CHK	Tue, Dec 16, 2008	17.14	17.74	16.75	17.15
3975	NASDAQ	CHK	Mon, Dec 15, 2008	18.33	18.83	16.20	16.55
3974	NASDAQ	CHK	Fri, Dec 12, 2008	16.40	17.76	16.12	17.59
3973	NASDAQ	CHK	Thu, Dec 11, 2008	19.22	19.91	16.95	17.52
3972	NASDAQ	CHK	Wed, Dec 10, 2008	16.06	19.08	15.99	18.85
3971	NASDAQ	CHK	Tue, Dec 9, 2008	14.70	16.78	14.54	15.30
3970	NASDAQ	CHK	Mon, Dec 8, 2008	15.87	16.06	14.53	14.89
3969	NASDAQ	CHK	Fri, Dec 5, 2008	12.17	12.28	10.40	11.97
3968	NASDAQ	CHK	Thu, Dec 4, 2008	14.53	14.86	12.16	12.52
3967	NASDAQ	CHK	Wed, Dec 3, 2008	14.20	15.21	14.20	14.91
3966	NASDAQ	CHK	Tue, Dec 2, 2008	16.29	16.42	14.50	15.07
3965	NASDAQ	CHK	Mon, Dec 1, 2008	17.35	17.35	15.86	15.86
3964	NASDAQ	CHK	Fri, Nov 28, 2008	18.72	18.99	16.73	18.16
3963	NASDAQ	CHK	Wed, Nov 26, 2008	19.26	21.43	19.17	21.40
3962	NASDAQ	CHK	Tue, Nov 25, 2008	19.97	19.98	18.66	19.28
3961	NASDAQ	CHK	Mon, Nov 24, 2008	19.10	20.01	18.00	19.30
3960	NASDAQ	CHK	Fri, Nov 21, 2008	15.89	18.00	15.44	17.94
3959	NASDAQ	CHK	Thu, Nov 20, 2008	20.01	20.06	14.63	14.78
3958	NASDAQ	CHK	Wed, Nov 19, 2008	22.01	22.35	20.33	20.40
3957	NASDAQ	CHK	Tue, Nov 18, 2008	22.52	22.72	21.04	22.32
3956	NASDAQ	CHK	Mon, Nov 17, 2008	22.23	23.32	21.84	22.27
3955	NASDAQ	CHK	Fri, Nov 14, 2008	22.37	23.68	21.73	22.44
3954	NASDAQ	CHK	Thu, Nov 13, 2008	21.30	23.51	20.15	23.07
3953	NASDAQ	CHK	Wed, Nov 12, 2008	23.10	23.55	21.17	21.28
3952	NASDAQ	CHK	Tue, Nov 11, 2008	25.23	25.48	23.10	23.64
3951	NASDAQ	CHK	Mon, Nov 10, 2008	26.09	26.16	24.23	25.02
3950	NASDAQ	CHK	Fri, Nov 7, 2008	24.37	25.00	23.20	24.73
3949	NASDAQ	CHK	Thu, Nov 6, 2008	26.08	26.95	23.27	23.82
3948	NASDAQ	CHK	Wed, Nov 5, 2008	23.52	28.49	23.21	26.25
3947	NASDAQ	CHK	Tue, Nov 4, 2008	22.76	24.31	22.69	24.26
3946	NASDAQ	CHK	Mon, Nov 3, 2008	22.93	23.43	21.29	21.81
3945	NASDAQ	CHK	Fri, Oct 31, 2008	23.53	23.91	21.83	23.23
3944	NASDAQ	CHK	Thu, Oct 30, 2008	23.54	23.58	20.94	23.33
3943	NASDAQ	CHK	Wed, Oct 29, 2008	21.27	23.24	20.76	21.83
3942	NASDAQ	CHK	Tue, Oct 28, 2008	20.07	20.62	17.92	20.58
3941	NASDAQ	CHK	Mon, Oct 27, 2008	21.09	21.39	18.65	18.66
3940	NASDAQ	CHK	Fri, Oct 24, 2008	18.66	22.14	18.47	21.57
3939	NASDAQ	CHK	Thu, Oct 23, 2008	22.42	23.34	20.64	22.68
3938	NASDAQ	CHK	Wed, Oct 22, 2008	23.11	23.97	21.27	22.33
3937	NASDAQ	CHK	Tue, Oct 21, 2008	24.06	26.02	23.66	24.65
3936	NASDAQ	CHK	Mon, Oct 20, 2008	23.78	24.70	22.78	24.65
3935	NASDAQ	CHK	Fri, Oct 17, 2008	19.11	23.81	17.76	21.64
3934	NASDAQ	CHK	Thu, Oct 16, 2008	18.39	19.42	17.30	19.40
3933	NASDAQ	CHK	Wed, Oct 15, 2008	21.76	21.76	16.81	17.27
3932	NASDAQ	CHK	Tue, Oct 14, 2008	24.92	25.37	22.22	22.81
3931	NASDAQ	CHK	Mon, Oct 13, 2008	20.19	22.31	19.30	21.36
3930	NASDAQ	CHK	Fri, Oct 10, 2008	16.57	19.66	12.68	17.47
3929	NASDAQ	CHK	Thu, Oct 9, 2008	24.92	25.46	18.07	18.72
3928	NASDAQ	CHK	Wed, Oct 8, 2008	22.23	25.37	21.67	23.69
3927	NASDAQ	CHK	Tue, Oct 7, 2008	29.26	29.57	23.47	23.68
3926	NASDAQ	CHK	Mon, Oct 6, 2008	28.33	28.54	24.75	28.02
3925	NASDAQ	CHK	Fri, Oct 3, 2008	32.30	33.71	30.41	30.57
3924	NASDAQ	CHK	Thu, Oct 2, 2008	35.73	35.73	31.52	31.79
3923	NASDAQ	CHK	Wed, Oct 1, 2008	37.08	37.49	34.81	36.26
3922	NASDAQ	CHK	Tue, Sep 30, 2008	35.19	38.42	34.84	37.91
3921	NASDAQ	CHK	Mon, Sep 29, 2008	38.73	38.80	32.93	34.47
3920	NASDAQ	CHK	Fri, Sep 26, 2008	40.98	41.72	39.51	40.11
3919	NASDAQ	CHK	Thu, Sep 25, 2008	41.54	43.46	41.17	42.74
3918	NASDAQ	CHK	Wed, Sep 24, 2008	43.93	44.17	41.63	41.90
3917	NASDAQ	CHK	Tue, Sep 23, 2008	43.87	45.11	41.98	43.28
3916	NASDAQ	CHK	Mon, Sep 22, 2008	44.61	45.83	42.89	43.23
3915	NASDAQ	CHK	Fri, Sep 19, 2008	43.35	44.69	41.82	44.12
3914	NASDAQ	CHK	Thu, Sep 18, 2008	40.40	42.31	38.81	40.78
3913	NASDAQ	CHK	Wed, Sep 17, 2008	41.03	42.24	38.70	39.29
3912	NASDAQ	CHK	Tue, Sep 16, 2008	38.92	41.00	37.32	40.83
3911	NASDAQ	CHK	Mon, Sep 15, 2008	41.97	42.98	40.11	40.57
3910	NASDAQ	CHK	Fri, Sep 12, 2008	42.91	44.76	42.71	44.68
3909	NASDAQ	CHK	Thu, Sep 11, 2008	42.10	42.87	40.45	42.46
3908	NASDAQ	CHK	Wed, Sep 10, 2008	41.76	42.92	40.28	42.45
3907	NASDAQ	CHK	Tue, Sep 9, 2008	44.12	44.44	41.10	41.12
3906	NASDAQ	CHK	Mon, Sep 8, 2008	47.71	47.94	44.93	45.16
3905	NASDAQ	CHK	Fri, Sep 5, 2008	47.44	47.81	45.51	46.88
3904	NASDAQ	CHK	Thu, Sep 4, 2008	47.78	48.63	45.94	47.22
3903	NASDAQ	CHK	Wed, Sep 3, 2008	47.55	48.73	46.43	47.74
3902	NASDAQ	CHK	Tue, Sep 2, 2008	48.79	49.14	47.61	47.83
3901	NASDAQ	CHK	Fri, Aug 29, 2008	52.72	52.73	51.08	51.17
3900	NASDAQ	CHK	Thu, Aug 28, 2008	53.98	54.02	51.00	52.06
3899	NASDAQ	CHK	Wed, Aug 27, 2008	53.74	53.80	52.63	53.50
3898	NASDAQ	CHK	Tue, Aug 26, 2008	52.00	53.11	51.67	52.28
3897	NASDAQ	CHK	Mon, Aug 25, 2008	50.20	51.67	49.81	50.75
3896	NASDAQ	CHK	Fri, Aug 22, 2008	51.07	51.53	49.56	50.38
3895	NASDAQ	CHK	Thu, Aug 21, 2008	52.42	53.00	51.35	52.22
3894	NASDAQ	CHK	Wed, Aug 20, 2008	50.61	51.80	49.17	51.40
3893	NASDAQ	CHK	Tue, Aug 19, 2008	47.82	50.00	47.57	49.60
3892	NASDAQ	CHK	Mon, Aug 18, 2008	48.38	49.29	47.26	47.49
3891	NASDAQ	CHK	Fri, Aug 15, 2008	48.29	48.95	47.36	48.14
3890	NASDAQ	CHK	Thu, Aug 14, 2008	49.29	50.47	48.20	49.06
3889	NASDAQ	CHK	Wed, Aug 13, 2008	47.61	50.32	47.32	49.81
3888	NASDAQ	CHK	Tue, Aug 12, 2008	46.76	47.99	46.02	47.60
3887	NASDAQ	CHK	Mon, Aug 11, 2008	46.15	47.34	44.61	46.02
3886	NASDAQ	CHK	Fri, Aug 8, 2008	46.72	46.83	45.26	45.77
3885	NASDAQ	CHK	Thu, Aug 7, 2008	49.88	50.22	47.57	47.69
3884	NASDAQ	CHK	Wed, Aug 6, 2008	47.54	49.80	47.54	48.98
3883	NASDAQ	CHK	Tue, Aug 5, 2008	47.57	48.78	46.30	47.49
3882	NASDAQ	CHK	Mon, Aug 4, 2008	52.27	52.33	46.95	47.84
3881	NASDAQ	CHK	Fri, Aug 1, 2008	52.33	54.67	51.29	52.04
3880	NASDAQ	CHK	Thu, Jul 31, 2008	53.66	53.92	51.84	53.02
3879	NASDAQ	CHK	Wed, Jul 30, 2008	49.43	54.10	49.43	53.87
3878	NASDAQ	CHK	Tue, Jul 29, 2008	51.06	51.37	49.30	49.88
3877	NASDAQ	CHK	Mon, Jul 28, 2008	51.76	53.47	51.25	51.73
3876	NASDAQ	CHK	Fri, Jul 25, 2008	52.11	52.44	50.56	51.05
3875	NASDAQ	CHK	Thu, Jul 24, 2008	50.48	52.49	47.57	51.87
3874	NASDAQ	CHK	Wed, Jul 23, 2008	54.13	55.39	49.28	49.65
3873	NASDAQ	CHK	Tue, Jul 22, 2008	57.77	57.99	53.61	54.02
3872	NASDAQ	CHK	Mon, Jul 21, 2008	57.61	59.33	56.69	59.04
3871	NASDAQ	CHK	Fri, Jul 18, 2008	58.15	59.75	56.24	57.44
3870	NASDAQ	CHK	Thu, Jul 17, 2008	60.26	61.11	54.98	57.87
3869	NASDAQ	CHK	Wed, Jul 16, 2008	62.37	62.43	58.26	59.91
3868	NASDAQ	CHK	Tue, Jul 15, 2008	66.48	67.45	62.55	62.89
3867	NASDAQ	CHK	Mon, Jul 14, 2008	68.15	68.63	65.94	66.60
3866	NASDAQ	CHK	Fri, Jul 11, 2008	67.11	69.74	65.48	67.15
3865	NASDAQ	CHK	Thu, Jul 10, 2008	61.41	65.27	61.03	65.10
3864	NASDAQ	CHK	Wed, Jul 9, 2008	62.42	64.49	61.02	61.02
3863	NASDAQ	CHK	Tue, Jul 8, 2008	66.90	66.90	62.80	65.07
3862	NASDAQ	CHK	Mon, Jul 7, 2008	70.15	71.72	67.02	68.02
3861	NASDAQ	CHK	Thu, Jul 3, 2008	71.59	72.67	67.26	70.60
3860	NASDAQ	CHK	Wed, Jul 2, 2008	77.28	78.23	73.18	73.37
3859	NASDAQ	CHK	Tue, Jul 1, 2008	70.04	71.39	69.25	71.21
3858	NASDAQ	CHK	Mon, Jun 30, 2008	70.10	70.94	68.65	69.73
3857	NASDAQ	CHK	Fri, Jun 27, 2008	66.83	68.54	66.49	67.76
3856	NASDAQ	CHK	Thu, Jun 26, 2008	68.19	68.45	64.46	66.50
3855	NASDAQ	CHK	Wed, Jun 25, 2008	69.51	69.51	65.18	67.42
3854	NASDAQ	CHK	Tue, Jun 24, 2008	71.26	71.31	68.96	69.20
3853	NASDAQ	CHK	Mon, Jun 23, 2008	68.62	71.83	68.19	71.67
3852	NASDAQ	CHK	Fri, Jun 20, 2008	68.77	69.35	66.82	67.62
3851	NASDAQ	CHK	Thu, Jun 19, 2008	71.51	72.00	66.37	67.02
3850	NASDAQ	CHK	Wed, Jun 18, 2008	68.45	69.86	67.97	69.71
3849	NASDAQ	CHK	Tue, Jun 17, 2008	64.78	67.70	64.67	67.66
3848	NASDAQ	CHK	Mon, Jun 16, 2008	63.94	65.02	63.20	64.55
3847	NASDAQ	CHK	Fri, Jun 13, 2008	61.53	63.14	60.81	62.65
3846	NASDAQ	CHK	Thu, Jun 12, 2008	62.24	62.90	60.96	61.63
3845	NASDAQ	CHK	Wed, Jun 11, 2008	63.25	63.70	62.03	63.08
3844	NASDAQ	CHK	Tue, Jun 10, 2008	64.03	64.96	61.08	62.23
3843	NASDAQ	CHK	Mon, Jun 9, 2008	62.53	64.31	62.38	63.52
3842	NASDAQ	CHK	Fri, Jun 6, 2008	61.85	64.07	61.32	61.37
3841	NASDAQ	CHK	Thu, Jun 5, 2008	57.69	59.30	57.33	59.29
3840	NASDAQ	CHK	Wed, Jun 4, 2008	57.89	58.60	56.65	56.80
3839	NASDAQ	CHK	Tue, Jun 3, 2008	58.99	60.02	58.04	58.46
3838	NASDAQ	CHK	Mon, Jun 2, 2008	57.87	59.74	57.66	58.79
3837	NASDAQ	CHK	Fri, May 30, 2008	56.23	58.40	56.20	57.90
3836	NASDAQ	CHK	Thu, May 29, 2008	56.40	57.25	55.16	55.30
3835	NASDAQ	CHK	Wed, May 28, 2008	55.99	57.09	54.45	56.96
3834	NASDAQ	CHK	Tue, May 27, 2008	55.29	57.06	55.16	56.23
3833	NASDAQ	CHK	Fri, May 23, 2008	57.83	58.06	55.36	55.56
3832	NASDAQ	CHK	Thu, May 22, 2008	59.05	59.43	55.68	57.17
3831	NASDAQ	CHK	Wed, May 21, 2008	60.31	60.66	58.58	58.90
3830	NASDAQ	CHK	Tue, May 20, 2008	61.75	62.71	60.54	60.54
3829	NASDAQ	CHK	Mon, May 19, 2008	62.50	63.24	61.79	62.31
3828	NASDAQ	CHK	Fri, May 16, 2008	61.01	62.16	61.01	62.14
3827	NASDAQ	CHK	Thu, May 15, 2008	61.04	61.98	58.99	60.37
3826	NASDAQ	CHK	Wed, May 14, 2008	62.00	63.01	60.27	60.43
3825	NASDAQ	CHK	Tue, May 13, 2008	59.16	62.04	58.72	61.59
3824	NASDAQ	CHK	Mon, May 12, 2008	59.20	59.48	58.41	59.16
3823	NASDAQ	CHK	Fri, May 9, 2008	60.26	60.53	58.83	59.91
3822	NASDAQ	CHK	Thu, May 8, 2008	59.82	59.82	58.25	59.79
3821	NASDAQ	CHK	Wed, May 7, 2008	61.15	61.18	59.16	59.33
3820	NASDAQ	CHK	Tue, May 6, 2008	57.59	60.47	57.59	60.18
3819	NASDAQ	CHK	Mon, May 5, 2008	56.22	58.12	56.14	57.87
3818	NASDAQ	CHK	Fri, May 2, 2008	54.79	55.97	53.60	55.68
3817	NASDAQ	CHK	Thu, May 1, 2008	54.46	55.24	51.70	53.84
3816	NASDAQ	CHK	Wed, Apr 30, 2008	54.95	55.04	53.15	54.66
3815	NASDAQ	CHK	Tue, Apr 29, 2008	56.02	56.56	54.03	54.29
3814	NASDAQ	CHK	Mon, Apr 28, 2008	58.15	58.15	56.76	56.88
3813	NASDAQ	CHK	Fri, Apr 25, 2008	55.45	57.81	55.19	57.81
3812	NASDAQ	CHK	Thu, Apr 24, 2008	55.57	56.03	54.30	54.74
3811	NASDAQ	CHK	Wed, Apr 23, 2008	56.74	56.74	55.19	56.16
3810	NASDAQ	CHK	Tue, Apr 22, 2008	54.99	58.00	54.88	56.75
3809	NASDAQ	CHK	Mon, Apr 21, 2008	53.77	54.81	53.24	54.64
3808	NASDAQ	CHK	Fri, Apr 18, 2008	52.33	53.28	51.38	53.27
3807	NASDAQ	CHK	Thu, Apr 17, 2008	53.81	54.13	52.07	52.31
3806	NASDAQ	CHK	Wed, Apr 16, 2008	52.58	53.95	52.27	53.95
3805	NASDAQ	CHK	Tue, Apr 15, 2008	51.95	52.21	51.22	52.14
3804	NASDAQ	CHK	Mon, Apr 14, 2008	50.14	51.63	50.06	51.33
3803	NASDAQ	CHK	Fri, Apr 11, 2008	51.06	51.47	50.20	50.32
3802	NASDAQ	CHK	Thu, Apr 10, 2008	52.14	52.41	51.15	51.80
3801	NASDAQ	CHK	Wed, Apr 9, 2008	51.05	52.36	50.99	51.79
3800	NASDAQ	CHK	Tue, Apr 8, 2008	49.89	51.03	49.53	50.69
3799	NASDAQ	CHK	Mon, Apr 7, 2008	50.00	50.84	49.41	49.72
3798	NASDAQ	CHK	Fri, Apr 4, 2008	48.47	49.51	48.47	49.08
3797	NASDAQ	CHK	Thu, Apr 3, 2008	48.27	49.16	47.89	48.42
3796	NASDAQ	CHK	Wed, Apr 2, 2008	49.16	49.82	48.77	49.36
3795	NASDAQ	CHK	Tue, Apr 1, 2008	48.80	49.53	47.84	49.33
3794	NASDAQ	CHK	Mon, Mar 31, 2008	48.37	49.26	48.11	48.79
3793	NASDAQ	CHK	Fri, Mar 28, 2008	48.52	49.16	48.03	48.10
3792	NASDAQ	CHK	Thu, Mar 27, 2008	49.26	50.08	48.63	48.74
3791	NASDAQ	CHK	Wed, Mar 26, 2008	49.36	50.44	49.27	50.07
3790	NASDAQ	CHK	Tue, Mar 25, 2008	48.74	49.64	48.19	49.06
3789	NASDAQ	CHK	Mon, Mar 24, 2008	46.83	48.17	46.78	47.59
3788	NASDAQ	CHK	Thu, Mar 20, 2008	45.80	46.91	44.56	46.82
3787	NASDAQ	CHK	Wed, Mar 19, 2008	50.14	50.42	46.72	46.74
3786	NASDAQ	CHK	Tue, Mar 18, 2008	49.45	50.69	49.19	50.65
3785	NASDAQ	CHK	Mon, Mar 17, 2008	49.56	49.90	47.78	48.53
3784	NASDAQ	CHK	Fri, Mar 14, 2008	52.72	52.72	50.11	50.64
3783	NASDAQ	CHK	Thu, Mar 13, 2008	48.86	52.15	48.78	51.80
3782	NASDAQ	CHK	Wed, Mar 12, 2008	49.28	50.20	48.99	49.35
3781	NASDAQ	CHK	Tue, Mar 11, 2008	47.96	48.66	46.86	48.61
3780	NASDAQ	CHK	Mon, Mar 10, 2008	47.51	47.51	46.30	46.61
3779	NASDAQ	CHK	Fri, Mar 7, 2008	47.30	48.20	46.43	47.30
3778	NASDAQ	CHK	Thu, Mar 6, 2008	49.16	49.62	47.57	47.65
3777	NASDAQ	CHK	Wed, Mar 5, 2008	49.09	49.38	48.10	49.16
3776	NASDAQ	CHK	Tue, Mar 4, 2008	49.06	49.50	48.00	48.90
3775	NASDAQ	CHK	Mon, Mar 3, 2008	48.01	48.96	47.89	48.72
3774	NASDAQ	CHK	Fri, Feb 29, 2008	48.73	48.77	47.57	47.81
3773	NASDAQ	CHK	Thu, Feb 28, 2008	48.38	49.32	48.28	48.90
3772	NASDAQ	CHK	Wed, Feb 27, 2008	48.10	48.82	47.86	47.94
3771	NASDAQ	CHK	Tue, Feb 26, 2008	48.74	49.37	48.09	48.91
3770	NASDAQ	CHK	Mon, Feb 25, 2008	46.93	49.16	46.89	48.86
3769	NASDAQ	CHK	Fri, Feb 22, 2008	46.51	47.14	45.99	46.99
3768	NASDAQ	CHK	Thu, Feb 21, 2008	47.34	47.73	46.45	46.71
3767	NASDAQ	CHK	Wed, Feb 20, 2008	45.85	47.59	45.81	47.41
3766	NASDAQ	CHK	Tue, Feb 19, 2008	46.20	46.64	45.74	46.15
3765	NASDAQ	CHK	Fri, Feb 15, 2008	45.56	45.99	44.96	45.51
3764	NASDAQ	CHK	Thu, Feb 14, 2008	45.03	45.90	44.69	45.34
3763	NASDAQ	CHK	Wed, Feb 13, 2008	43.61	44.86	43.61	44.66
3762	NASDAQ	CHK	Tue, Feb 12, 2008	43.56	44.31	43.16	43.69
3761	NASDAQ	CHK	Mon, Feb 11, 2008	41.23	43.58	40.92	43.50
3760	NASDAQ	CHK	Fri, Feb 8, 2008	39.44	40.97	39.15	40.85
3759	NASDAQ	CHK	Thu, Feb 7, 2008	38.60	39.67	38.60	39.57
3758	NASDAQ	CHK	Wed, Feb 6, 2008	39.25	39.61	38.77	38.88
3757	NASDAQ	CHK	Tue, Feb 5, 2008	39.57	39.81	39.06	39.06
3756	NASDAQ	CHK	Mon, Feb 4, 2008	39.87	40.44	39.49	40.15
3755	NASDAQ	CHK	Fri, Feb 1, 2008	39.27	40.09	39.19	39.87
3754	NASDAQ	CHK	Thu, Jan 31, 2008	38.66	39.61	38.24	39.33
3753	NASDAQ	CHK	Wed, Jan 30, 2008	38.90	39.90	38.75	38.99
3752	NASDAQ	CHK	Tue, Jan 29, 2008	38.96	39.31	38.83	38.99
3751	NASDAQ	CHK	Mon, Jan 28, 2008	38.14	38.90	38.02	38.64
3750	NASDAQ	CHK	Fri, Jan 25, 2008	39.00	39.38	37.93	38.17
3749	NASDAQ	CHK	Thu, Jan 24, 2008	38.07	38.87	38.03	38.64
3748	NASDAQ	CHK	Wed, Jan 23, 2008	37.45	38.44	36.39	38.06
3747	NASDAQ	CHK	Tue, Jan 22, 2008	37.34	38.87	37.25	38.58
3746	NASDAQ	CHK	Fri, Jan 18, 2008	39.10	39.93	38.70	39.36
3745	NASDAQ	CHK	Thu, Jan 17, 2008	40.75	41.31	38.77	38.91
3744	NASDAQ	CHK	Wed, Jan 16, 2008	41.55	41.87	40.26	40.68
3743	NASDAQ	CHK	Tue, Jan 15, 2008	42.35	42.60	41.57	41.80
3742	NASDAQ	CHK	Mon, Jan 14, 2008	41.99	42.94	41.99	42.80
3741	NASDAQ	CHK	Fri, Jan 11, 2008	41.24	42.02	40.94	41.78
3740	NASDAQ	CHK	Thu, Jan 10, 2008	41.23	41.75	40.81	41.54
3739	NASDAQ	CHK	Wed, Jan 9, 2008	40.76	41.55	40.67	41.38
3738	NASDAQ	CHK	Tue, Jan 8, 2008	41.62	41.81	40.64	40.72
3737	NASDAQ	CHK	Mon, Jan 7, 2008	41.74	41.82	40.72	41.34
3736	NASDAQ	CHK	Fri, Jan 4, 2008	42.14	42.56	41.50	41.57
3735	NASDAQ	CHK	Thu, Jan 3, 2008	42.53	43.18	42.31	42.82
3734	NASDAQ	CHK	Wed, Jan 2, 2008	41.88	42.43	41.88	42.30
3733	NASDAQ	CHK	Mon, Dec 31, 2007	41.61	41.95	41.44	41.44
3732	NASDAQ	CHK	Fri, Dec 28, 2007	41.45	42.02	41.45	41.79
3731	NASDAQ	CHK	Thu, Dec 27, 2007	41.16	41.63	41.16	41.36
3730	NASDAQ	CHK	Wed, Dec 26, 2007	40.97	41.64	40.97	41.44
3729	NASDAQ	CHK	Mon, Dec 24, 2007	41.52	41.67	41.19	41.32
3728	NASDAQ	CHK	Fri, Dec 21, 2007	40.59	41.44	40.46	41.33
3727	NASDAQ	CHK	Thu, Dec 20, 2007	40.52	40.79	40.14	40.59
3726	NASDAQ	CHK	Wed, Dec 19, 2007	40.33	40.75	40.10	40.47
3725	NASDAQ	CHK	Tue, Dec 18, 2007	39.97	40.53	39.89	40.32
3724	NASDAQ	CHK	Mon, Dec 17, 2007	40.21	40.55	39.46	39.76
3723	NASDAQ	CHK	Fri, Dec 14, 2007	41.06	41.07	40.28	40.40
3722	NASDAQ	CHK	Thu, Dec 13, 2007	40.49	41.31	40.47	41.17
3721	NASDAQ	CHK	Wed, Dec 12, 2007	40.59	40.96	40.34	40.77
3720	NASDAQ	CHK	Tue, Dec 11, 2007	40.82	41.15	39.94	39.95
3719	NASDAQ	CHK	Mon, Dec 10, 2007	40.60	40.80	40.47	40.77
3718	NASDAQ	CHK	Fri, Dec 7, 2007	40.75	41.02	40.24	40.57
3717	NASDAQ	CHK	Thu, Dec 6, 2007	39.86	40.91	39.84	40.65
3716	NASDAQ	CHK	Wed, Dec 5, 2007	39.83	40.03	39.66	39.83
3715	NASDAQ	CHK	Tue, Dec 4, 2007	39.49	39.87	39.30	39.52
3714	NASDAQ	CHK	Mon, Dec 3, 2007	39.40	39.73	39.16	39.65
3713	NASDAQ	CHK	Fri, Nov 30, 2007	40.07	40.43	39.55	40.02
3712	NASDAQ	CHK	Thu, Nov 29, 2007	40.70	40.70	40.03	40.16
3711	NASDAQ	CHK	Wed, Nov 28, 2007	39.75	40.29	39.19	40.13
3710	NASDAQ	CHK	Tue, Nov 27, 2007	39.83	39.85	38.70	39.52
3709	NASDAQ	CHK	Mon, Nov 26, 2007	40.80	40.84	39.95	39.98
3708	NASDAQ	CHK	Fri, Nov 23, 2007	39.86	40.34	39.47	40.31
3707	NASDAQ	CHK	Wed, Nov 21, 2007	39.99	40.39	39.38	39.42
3706	NASDAQ	CHK	Tue, Nov 20, 2007	40.16	40.81	39.83	40.25
3705	NASDAQ	CHK	Mon, Nov 19, 2007	40.64	40.64	39.70	39.93
3704	NASDAQ	CHK	Fri, Nov 16, 2007	40.52	40.99	40.07	40.36
3703	NASDAQ	CHK	Thu, Nov 15, 2007	40.55	41.05	40.05	40.45
3702	NASDAQ	CHK	Wed, Nov 14, 2007	41.54	41.94	40.94	41.13
3701	NASDAQ	CHK	Tue, Nov 13, 2007	40.90	41.40	40.30	41.36
3700	NASDAQ	CHK	Mon, Nov 12, 2007	42.29	42.66	40.83	40.89
3699	NASDAQ	CHK	Fri, Nov 9, 2007	43.30	50.06	42.47	42.52
3698	NASDAQ	CHK	Thu, Nov 8, 2007	42.42	43.55	42.42	43.41
3697	NASDAQ	CHK	Wed, Nov 7, 2007	43.05	43.38	42.34	42.39
3696	NASDAQ	CHK	Tue, Nov 6, 2007	42.12	43.03	42.12	43.00
3695	NASDAQ	CHK	Mon, Nov 5, 2007	41.50	42.28	41.50	41.91
3694	NASDAQ	CHK	Fri, Nov 2, 2007	41.81	42.41	41.71	42.36
3693	NASDAQ	CHK	Thu, Nov 1, 2007	41.42	42.37	41.08	41.63
3692	NASDAQ	CHK	Wed, Oct 31, 2007	41.10	42.01	40.89	41.74
3691	NASDAQ	CHK	Tue, Oct 30, 2007	40.99	41.17	40.54	40.66
3690	NASDAQ	CHK	Mon, Oct 29, 2007	41.17	41.59	40.92	41.09
3689	NASDAQ	CHK	Fri, Oct 26, 2007	40.39	41.28	40.33	41.03
3688	NASDAQ	CHK	Thu, Oct 25, 2007	39.42	40.36	39.27	40.29
3687	NASDAQ	CHK	Wed, Oct 24, 2007	38.68	39.50	38.63	39.34
3686	NASDAQ	CHK	Tue, Oct 23, 2007	39.38	39.38	38.59	39.05
3685	NASDAQ	CHK	Mon, Oct 22, 2007	39.38	39.65	38.85	39.35
3684	NASDAQ	CHK	Fri, Oct 19, 2007	40.59	40.68	39.69	39.75
3683	NASDAQ	CHK	Thu, Oct 18, 2007	39.75	40.65	39.57	40.59
3682	NASDAQ	CHK	Wed, Oct 17, 2007	39.99	40.16	39.48	39.75
3681	NASDAQ	CHK	Tue, Oct 16, 2007	39.89	40.38	39.67	39.91
3680	NASDAQ	CHK	Mon, Oct 15, 2007	39.74	40.14	39.56	39.95
3679	NASDAQ	CHK	Fri, Oct 12, 2007	39.55	39.72	39.34	39.64
3678	NASDAQ	CHK	Thu, Oct 11, 2007	39.53	39.93	39.02	39.32
3677	NASDAQ	CHK	Wed, Oct 10, 2007	38.58	39.49	38.42	39.25
3676	NASDAQ	CHK	Tue, Oct 9, 2007	38.80	39.19	38.66	39.13
3675	NASDAQ	CHK	Mon, Oct 8, 2007	38.45	39.06	38.39	38.50
3674	NASDAQ	CHK	Fri, Oct 5, 2007	38.53	39.04	38.42	38.98
3673	NASDAQ	CHK	Thu, Oct 4, 2007	37.81	38.59	37.59	38.51
3672	NASDAQ	CHK	Wed, Oct 3, 2007	37.95	38.32	37.73	37.86
3671	NASDAQ	CHK	Tue, Oct 2, 2007	37.96	38.24	37.87	38.14
3670	NASDAQ	CHK	Mon, Oct 1, 2007	37.19	38.07	36.90	38.06
3669	NASDAQ	CHK	Fri, Sep 28, 2007	37.32	37.73	37.17	37.28
3668	NASDAQ	CHK	Thu, Sep 27, 2007	37.07	37.58	36.74	37.38
3667	NASDAQ	CHK	Wed, Sep 26, 2007	37.26	37.65	36.45	36.85
3666	NASDAQ	CHK	Tue, Sep 25, 2007	36.99	37.26	36.70	37.24
3665	NASDAQ	CHK	Mon, Sep 24, 2007	37.64	37.64	36.99	37.16
3664	NASDAQ	CHK	Fri, Sep 21, 2007	37.50	37.96	37.35	37.59
3663	NASDAQ	CHK	Thu, Sep 20, 2007	37.53	37.90	37.13	37.35
3662	NASDAQ	CHK	Wed, Sep 19, 2007	37.74	38.25	37.20	37.51
3661	NASDAQ	CHK	Tue, Sep 18, 2007	37.00	37.83	36.72	37.72
3660	NASDAQ	CHK	Mon, Sep 17, 2007	36.98	37.27	36.83	36.99
3659	NASDAQ	CHK	Fri, Sep 14, 2007	36.60	37.16	36.50	36.95
3658	NASDAQ	CHK	Thu, Sep 13, 2007	36.92	36.97	36.59	36.78
3657	NASDAQ	CHK	Wed, Sep 12, 2007	36.46	37.03	36.29	36.74
3656	NASDAQ	CHK	Tue, Sep 11, 2007	35.93	36.35	35.45	36.35
3655	NASDAQ	CHK	Mon, Sep 10, 2007	36.06	36.24	35.25	35.80
3654	NASDAQ	CHK	Fri, Sep 7, 2007	35.52	35.97	35.18	35.93
3653	NASDAQ	CHK	Thu, Sep 6, 2007	35.79	36.27	35.79	35.91
3652	NASDAQ	CHK	Wed, Sep 5, 2007	35.52	35.96	35.24	35.83
3651	NASDAQ	CHK	Tue, Sep 4, 2007	33.91	34.89	33.88	34.70
3650	NASDAQ	CHK	Fri, Aug 31, 2007	33.78	34.35	33.74	34.11
3649	NASDAQ	CHK	Thu, Aug 30, 2007	33.52	33.89	33.30	33.51
3648	NASDAQ	CHK	Wed, Aug 29, 2007	34.10	34.15	33.34	33.52
3647	NASDAQ	CHK	Tue, Aug 28, 2007	34.33	34.36	33.64	33.70
3646	NASDAQ	CHK	Mon, Aug 27, 2007	34.53	34.67	34.30	34.43
3645	NASDAQ	CHK	Fri, Aug 24, 2007	34.48	34.94	34.41	34.93
3644	NASDAQ	CHK	Thu, Aug 23, 2007	34.42	34.78	34.24	34.60
3643	NASDAQ	CHK	Wed, Aug 22, 2007	35.32	35.36	34.10	34.37
3642	NASDAQ	CHK	Tue, Aug 21, 2007	34.88	35.07	34.31	34.84
3641	NASDAQ	CHK	Mon, Aug 20, 2007	35.26	35.46	34.36	34.92
3640	NASDAQ	CHK	Fri, Aug 17, 2007	35.40	35.68	34.36	35.47
3639	NASDAQ	CHK	Thu, Aug 16, 2007	34.54	34.72	33.18	34.54
3638	NASDAQ	CHK	Wed, Aug 15, 2007	35.50	36.05	34.89	34.91
3637	NASDAQ	CHK	Tue, Aug 14, 2007	36.47	36.47	35.42	35.53
3636	NASDAQ	CHK	Mon, Aug 13, 2007	36.22	36.53	35.99	36.16
3635	NASDAQ	CHK	Fri, Aug 10, 2007	35.25	35.99	34.67	35.97
3634	NASDAQ	CHK	Thu, Aug 9, 2007	35.03	36.14	34.52	35.70
3633	NASDAQ	CHK	Wed, Aug 8, 2007	37.88	38.74	37.31	37.46
3632	NASDAQ	CHK	Tue, Aug 7, 2007	37.18	38.02	36.80	37.62
3631	NASDAQ	CHK	Mon, Aug 6, 2007	37.27	37.85	36.47	37.79
3630	NASDAQ	CHK	Fri, Aug 3, 2007	37.37	38.22	37.11	37.18
3629	NASDAQ	CHK	Thu, Aug 2, 2007	36.37	36.95	35.80	36.63
3628	NASDAQ	CHK	Wed, Aug 1, 2007	36.06	36.63	35.48	36.35
3627	NASDAQ	CHK	Tue, Jul 31, 2007	36.36	36.74	35.93	35.99
3626	NASDAQ	CHK	Mon, Jul 30, 2007	35.91	36.32	35.26	35.97
3625	NASDAQ	CHK	Fri, Jul 27, 2007	35.72	36.42	35.16	35.71
3624	NASDAQ	CHK	Thu, Jul 26, 2007	36.28	36.33	35.02	35.88
3623	NASDAQ	CHK	Wed, Jul 25, 2007	36.59	36.84	35.84	36.38
3622	NASDAQ	CHK	Tue, Jul 24, 2007	37.25	37.55	36.04	36.26
3621	NASDAQ	CHK	Mon, Jul 23, 2007	38.86	38.86	37.71	37.81
3620	NASDAQ	CHK	Fri, Jul 20, 2007	39.17	39.28	38.37	38.58
3619	NASDAQ	CHK	Thu, Jul 19, 2007	38.85	39.70	38.77	39.07
3618	NASDAQ	CHK	Wed, Jul 18, 2007	37.85	38.76	37.85	38.63
3617	NASDAQ	CHK	Tue, Jul 17, 2007	38.16	38.56	37.77	37.92
3616	NASDAQ	CHK	Mon, Jul 16, 2007	38.48	38.48	37.58	37.85
3615	NASDAQ	CHK	Fri, Jul 13, 2007	37.28	39.49	37.28	38.40
3614	NASDAQ	CHK	Thu, Jul 12, 2007	37.31	37.45	36.83	37.37
3613	NASDAQ	CHK	Wed, Jul 11, 2007	37.32	37.34	36.53	36.97
3612	NASDAQ	CHK	Tue, Jul 10, 2007	37.21	37.76	36.94	37.28
3611	NASDAQ	CHK	Mon, Jul 9, 2007	37.27	37.52	37.16	37.30
3610	NASDAQ	CHK	Fri, Jul 6, 2007	37.48	37.53	37.08	37.27
3609	NASDAQ	CHK	Thu, Jul 5, 2007	37.47	37.53	36.82	37.27
3608	NASDAQ	CHK	Tue, Jul 3, 2007	37.14	37.32	36.95	37.32
3607	NASDAQ	CHK	Mon, Jul 2, 2007	36.79	37.11	36.60	37.11
3606	NASDAQ	CHK	Fri, Jun 29, 2007	36.91	37.19	36.47	36.58
3605	NASDAQ	CHK	Thu, Jun 28, 2007	37.20	37.54	36.51	36.64
3604	NASDAQ	CHK	Wed, Jun 27, 2007	36.47	37.22	36.21	37.21
3603	NASDAQ	CHK	Tue, Jun 26, 2007	37.52	37.71	36.62	36.79
3602	NASDAQ	CHK	Mon, Jun 25, 2007	37.74	38.03	37.28	37.63
3601	NASDAQ	CHK	Fri, Jun 22, 2007	38.83	38.97	37.93	38.29
3600	NASDAQ	CHK	Thu, Jun 21, 2007	38.91	39.20	38.43	39.06
3599	NASDAQ	CHK	Wed, Jun 20, 2007	39.78	39.91	38.50	38.51
3598	NASDAQ	CHK	Tue, Jun 19, 2007	39.59	39.76	39.33	39.64
3597	NASDAQ	CHK	Mon, Jun 18, 2007	39.43	39.88	39.29	39.74
3596	NASDAQ	CHK	Fri, Jun 15, 2007	39.41	39.55	39.09	39.46
3595	NASDAQ	CHK	Thu, Jun 14, 2007	38.59	39.25	38.38	39.09
3594	NASDAQ	CHK	Wed, Jun 13, 2007	37.75	38.44	37.59	38.36
3593	NASDAQ	CHK	Tue, Jun 12, 2007	37.39	37.98	37.20	37.42
3592	NASDAQ	CHK	Mon, Jun 11, 2007	37.64	37.90	37.29	37.43
3591	NASDAQ	CHK	Fri, Jun 8, 2007	37.00	37.62	36.75	37.62
3590	NASDAQ	CHK	Thu, Jun 7, 2007	37.75	38.25	37.14	37.19
3589	NASDAQ	CHK	Wed, Jun 6, 2007	38.41	38.41	37.81	37.95
3588	NASDAQ	CHK	Tue, Jun 5, 2007	38.10	38.57	37.89	38.48
3587	NASDAQ	CHK	Mon, Jun 4, 2007	37.12	38.65	37.11	38.30
3586	NASDAQ	CHK	Fri, Jun 1, 2007	37.20	37.28	36.84	37.04
3585	NASDAQ	CHK	Thu, May 31, 2007	37.17	38.02	36.82	36.85
3584	NASDAQ	CHK	Wed, May 30, 2007	36.56	37.27	36.47	37.11
3583	NASDAQ	CHK	Tue, May 29, 2007	36.78	36.98	36.47	36.74
3582	NASDAQ	CHK	Fri, May 25, 2007	37.09	37.27	36.55	36.89
3581	NASDAQ	CHK	Thu, May 24, 2007	37.43	37.75	36.50	36.62
3580	NASDAQ	CHK	Wed, May 23, 2007	37.50	37.96	37.24	37.26
3579	NASDAQ	CHK	Tue, May 22, 2007	37.65	37.83	37.22	37.27
3578	NASDAQ	CHK	Mon, May 21, 2007	37.29	37.98	37.25	37.67
3577	NASDAQ	CHK	Fri, May 18, 2007	37.00	37.32	36.95	37.28
3576	NASDAQ	CHK	Thu, May 17, 2007	36.32	37.04	35.99	36.89
3575	NASDAQ	CHK	Wed, May 16, 2007	36.06	36.45	35.68	36.25
3574	NASDAQ	CHK	Tue, May 15, 2007	36.59	36.75	36.05	36.13
3573	NASDAQ	CHK	Mon, May 14, 2007	36.38	36.78	36.19	36.50
3572	NASDAQ	CHK	Fri, May 11, 2007	35.97	36.40	35.87	36.26
3571	NASDAQ	CHK	Thu, May 10, 2007	36.26	36.36	35.73	35.85
3570	NASDAQ	CHK	Wed, May 9, 2007	36.67	36.92	36.29	36.36
3569	NASDAQ	CHK	Tue, May 8, 2007	37.64	37.64	36.83	37.31
3568	NASDAQ	CHK	Mon, May 7, 2007	37.37	37.74	37.10	37.65
3567	NASDAQ	CHK	Fri, May 4, 2007	37.80	38.20	37.30	37.57
3566	NASDAQ	CHK	Thu, May 3, 2007	37.64	38.29	37.27	38.21
3565	NASDAQ	CHK	Wed, May 2, 2007	36.47	37.72	36.47	37.64
3564	NASDAQ	CHK	Tue, May 1, 2007	35.72	36.47	35.43	36.42
3563	NASDAQ	CHK	Mon, Apr 30, 2007	35.68	36.37	35.53	35.68
3562	NASDAQ	CHK	Fri, Apr 27, 2007	35.42	35.88	35.19	35.60
3561	NASDAQ	CHK	Thu, Apr 26, 2007	35.54	35.67	35.23	35.52
3560	NASDAQ	CHK	Wed, Apr 25, 2007	35.05	35.79	34.85	35.67
3559	NASDAQ	CHK	Tue, Apr 24, 2007	34.97	35.14	34.77	34.90
3558	NASDAQ	CHK	Mon, Apr 23, 2007	34.55	34.95	34.45	34.82
3557	NASDAQ	CHK	Fri, Apr 20, 2007	34.69	34.76	34.34	34.69
3556	NASDAQ	CHK	Thu, Apr 19, 2007	34.59	34.59	34.16	34.34
3555	NASDAQ	CHK	Wed, Apr 18, 2007	35.03	35.23	34.70	34.71
3554	NASDAQ	CHK	Tue, Apr 17, 2007	35.58	35.68	35.03	35.25
3553	NASDAQ	CHK	Mon, Apr 16, 2007	35.58	35.63	35.12	35.55
3552	NASDAQ	CHK	Fri, Apr 13, 2007	35.52	35.68	35.21	35.62
3551	NASDAQ	CHK	Thu, Apr 12, 2007	35.31	35.52	34.77	35.49
3550	NASDAQ	CHK	Wed, Apr 11, 2007	35.33	35.46	34.89	35.07
3549	NASDAQ	CHK	Tue, Apr 10, 2007	34.45	35.28	34.42	35.24
3548	NASDAQ	CHK	Mon, Apr 9, 2007	34.37	34.71	34.17	34.45
3547	NASDAQ	CHK	Thu, Apr 5, 2007	33.96	34.54	33.92	34.37
3546	NASDAQ	CHK	Wed, Apr 4, 2007	33.74	34.10	33.47	34.00
3545	NASDAQ	CHK	Tue, Apr 3, 2007	33.28	34.12	33.08	33.91
3544	NASDAQ	CHK	Mon, Apr 2, 2007	32.66	33.39	32.65	33.34
3543	NASDAQ	CHK	Fri, Mar 30, 2007	32.83	32.94	32.57	32.65
3542	NASDAQ	CHK	Thu, Mar 29, 2007	33.11	33.29	32.67	32.84
3541	NASDAQ	CHK	Wed, Mar 28, 2007	33.14	33.23	32.74	32.84
3540	NASDAQ	CHK	Tue, Mar 27, 2007	32.67	32.96	32.50	32.86
3539	NASDAQ	CHK	Mon, Mar 26, 2007	32.68	32.86	32.23	32.78
3538	NASDAQ	CHK	Fri, Mar 23, 2007	32.45	32.59	32.03	32.52
3537	NASDAQ	CHK	Thu, Mar 22, 2007	32.75	32.77	32.17	32.33
3536	NASDAQ	CHK	Wed, Mar 21, 2007	32.20	32.72	32.07	32.49
3535	NASDAQ	CHK	Tue, Mar 20, 2007	31.92	32.19	31.65	32.18
3534	NASDAQ	CHK	Mon, Mar 19, 2007	31.57	32.02	31.26	32.00
3533	NASDAQ	CHK	Fri, Mar 16, 2007	31.52	31.88	31.21	31.26
3532	NASDAQ	CHK	Thu, Mar 15, 2007	31.40	31.72	31.37	31.40
3531	NASDAQ	CHK	Wed, Mar 14, 2007	31.24	31.64	30.84	31.57
3530	NASDAQ	CHK	Tue, Mar 13, 2007	31.56	31.97	31.00	31.08
3529	NASDAQ	CHK	Mon, Mar 12, 2007	31.83	32.16	31.19	31.59
3528	NASDAQ	CHK	Fri, Mar 9, 2007	32.17	32.31	31.84	31.85
3527	NASDAQ	CHK	Thu, Mar 8, 2007	32.40	32.46	31.84	32.12
3526	NASDAQ	CHK	Wed, Mar 7, 2007	31.81	32.60	31.80	32.05
3525	NASDAQ	CHK	Tue, Mar 6, 2007	31.57	32.02	31.47	31.96
3524	NASDAQ	CHK	Mon, Mar 5, 2007	30.71	31.63	30.71	31.31
3523	NASDAQ	CHK	Fri, Mar 2, 2007	32.16	32.21	31.57	31.60
3522	NASDAQ	CHK	Thu, Mar 1, 2007	31.91	32.48	31.45	32.16
3521	NASDAQ	CHK	Wed, Feb 28, 2007	32.16	32.48	31.83	32.18
3520	NASDAQ	CHK	Tue, Feb 27, 2007	32.33	33.01	31.72	32.11
3519	NASDAQ	CHK	Mon, Feb 26, 2007	32.40	33.65	32.30	33.05
3518	NASDAQ	CHK	Fri, Feb 23, 2007	31.80	32.38	31.77	32.21
3517	NASDAQ	CHK	Thu, Feb 22, 2007	31.08	31.36	30.73	31.27
3516	NASDAQ	CHK	Wed, Feb 21, 2007	30.98	31.10	30.62	31.02
3515	NASDAQ	CHK	Tue, Feb 20, 2007	30.98	30.98	30.62	30.97
3514	NASDAQ	CHK	Fri, Feb 16, 2007	30.96	31.48	30.87	31.38
3513	NASDAQ	CHK	Thu, Feb 15, 2007	31.26	31.26	30.68	31.01
3512	NASDAQ	CHK	Wed, Feb 14, 2007	31.38	31.66	31.08	31.30
3511	NASDAQ	CHK	Tue, Feb 13, 2007	30.83	31.30	30.66	31.25
3510	NASDAQ	CHK	Mon, Feb 12, 2007	31.06	31.21	30.63	30.79
3509	NASDAQ	CHK	Fri, Feb 9, 2007	31.21	31.45	31.06	31.33
3508	NASDAQ	CHK	Thu, Feb 8, 2007	30.67	31.31	30.67	31.11
3507	NASDAQ	CHK	Wed, Feb 7, 2007	30.96	31.20	30.53	30.81
3506	NASDAQ	CHK	Tue, Feb 6, 2007	31.51	31.51	30.74	30.92
3505	NASDAQ	CHK	Mon, Feb 5, 2007	31.63	31.70	31.20	31.31
3504	NASDAQ	CHK	Fri, Feb 2, 2007	31.43	31.48	30.88	31.15
3503	NASDAQ	CHK	Thu, Feb 1, 2007	31.72	31.82	31.10	31.33
3502	NASDAQ	CHK	Wed, Jan 31, 2007	31.03	31.52	30.72	31.30
3501	NASDAQ	CHK	Tue, Jan 30, 2007	30.49	31.27	30.49	31.09
3500	NASDAQ	CHK	Mon, Jan 29, 2007	30.54	30.91	30.22	30.33
3499	NASDAQ	CHK	Fri, Jan 26, 2007	30.96	31.15	30.63	30.66
3498	NASDAQ	CHK	Thu, Jan 25, 2007	31.65	31.67	30.60	30.70
3497	NASDAQ	CHK	Wed, Jan 24, 2007	31.53	31.76	31.18	31.67
3496	NASDAQ	CHK	Tue, Jan 23, 2007	30.97	31.83	30.83	31.82
3495	NASDAQ	CHK	Mon, Jan 22, 2007	30.72	31.03	30.46	30.59
3494	NASDAQ	CHK	Fri, Jan 19, 2007	29.88	30.70	29.82	30.62
3493	NASDAQ	CHK	Thu, Jan 18, 2007	30.04	30.13	29.48	29.75
3492	NASDAQ	CHK	Wed, Jan 17, 2007	29.40	30.14	29.40	29.88
3491	NASDAQ	CHK	Tue, Jan 16, 2007	29.73	29.90	29.35	29.53
3490	NASDAQ	CHK	Fri, Jan 12, 2007	28.97	29.78	28.97	29.66
3489	NASDAQ	CHK	Thu, Jan 11, 2007	29.09	29.69	28.83	28.86
3488	NASDAQ	CHK	Wed, Jan 10, 2007	29.38	29.56	29.08	29.17
3487	NASDAQ	CHK	Tue, Jan 9, 2007	29.23	29.81	29.09	29.50
3486	NASDAQ	CHK	Mon, Jan 8, 2007	29.92	30.12	29.28	29.58
3485	NASDAQ	CHK	Fri, Jan 5, 2007	29.34	29.74	29.09	29.55
3484	NASDAQ	CHK	Thu, Jan 4, 2007	29.27	29.73	29.09	29.31
3483	NASDAQ	CHK	Wed, Jan 3, 2007	30.43	30.71	29.34	29.42
3482	NASDAQ	CHK	Fri, Dec 29, 2006	30.98	31.04	30.66	30.71
3481	NASDAQ	CHK	Thu, Dec 28, 2006	31.24	31.40	30.94	31.05
3480	NASDAQ	CHK	Wed, Dec 27, 2006	31.19	31.29	30.79	31.16
3479	NASDAQ	CHK	Tue, Dec 26, 2006	32.02	32.02	30.87	31.01
3478	NASDAQ	CHK	Fri, Dec 22, 2006	31.72	31.93	31.45	31.51
3477	NASDAQ	CHK	Thu, Dec 21, 2006	32.10	32.38	31.43	31.83
3476	NASDAQ	CHK	Wed, Dec 20, 2006	32.52	32.74	32.14	32.21
3475	NASDAQ	CHK	Tue, Dec 19, 2006	32.25	32.81	32.11	32.64
3474	NASDAQ	CHK	Mon, Dec 18, 2006	32.70	32.89	32.26	32.46
3473	NASDAQ	CHK	Fri, Dec 15, 2006	33.25	33.25	32.42	32.93
3472	NASDAQ	CHK	Thu, Dec 14, 2006	33.24	33.45	33.05	33.25
3471	NASDAQ	CHK	Wed, Dec 13, 2006	33.15	33.32	32.51	33.01
3470	NASDAQ	CHK	Tue, Dec 12, 2006	33.37	33.64	32.87	33.08
3469	NASDAQ	CHK	Mon, Dec 11, 2006	33.93	34.57	33.30	33.60
3468	NASDAQ	CHK	Fri, Dec 8, 2006	33.99	34.25	33.83	33.92
3467	NASDAQ	CHK	Thu, Dec 7, 2006	35.81	35.81	35.32	35.52
3466	NASDAQ	CHK	Wed, Dec 6, 2006	35.63	36.11	35.54	35.66
3465	NASDAQ	CHK	Tue, Dec 5, 2006	35.80	36.02	35.40	35.69
3464	NASDAQ	CHK	Mon, Dec 4, 2006	35.80	35.84	35.27	35.63
3463	NASDAQ	CHK	Fri, Dec 1, 2006	35.73	36.05	35.09	36.04
3462	NASDAQ	CHK	Thu, Nov 30, 2006	36.05	36.23	35.69	35.98
3461	NASDAQ	CHK	Wed, Nov 29, 2006	35.00	35.98	34.91	35.92
3460	NASDAQ	CHK	Tue, Nov 28, 2006	34.28	35.10	34.25	34.84
3459	NASDAQ	CHK	Mon, Nov 27, 2006	34.63	34.73	34.25	34.33
3458	NASDAQ	CHK	Fri, Nov 24, 2006	34.55	34.88	34.36	34.41
3457	NASDAQ	CHK	Wed, Nov 22, 2006	34.79	35.07	34.30	34.58
3456	NASDAQ	CHK	Tue, Nov 21, 2006	34.21	34.91	34.15	34.78
3455	NASDAQ	CHK	Mon, Nov 20, 2006	34.35	34.48	34.04	34.17
3454	NASDAQ	CHK	Fri, Nov 17, 2006	33.83	34.68	33.64	34.37
3453	NASDAQ	CHK	Thu, Nov 16, 2006	34.84	34.96	33.91	33.96
3452	NASDAQ	CHK	Wed, Nov 15, 2006	34.26	34.88	34.04	34.62
3451	NASDAQ	CHK	Tue, Nov 14, 2006	34.20	34.32	33.85	34.08
3450	NASDAQ	CHK	Mon, Nov 13, 2006	33.88	34.22	33.74	33.99
3449	NASDAQ	CHK	Fri, Nov 10, 2006	34.25	34.50	33.92	34.15
3448	NASDAQ	CHK	Thu, Nov 9, 2006	34.62	34.99	34.38	34.44
3447	NASDAQ	CHK	Wed, Nov 8, 2006	33.82	34.53	33.45	34.43
3446	NASDAQ	CHK	Tue, Nov 7, 2006	33.99	34.08	33.50	33.64
3445	NASDAQ	CHK	Mon, Nov 6, 2006	33.97	34.20	33.58	34.07
3444	NASDAQ	CHK	Fri, Nov 3, 2006	33.83	34.25	33.79	33.99
3443	NASDAQ	CHK	Thu, Nov 2, 2006	33.58	33.83	33.09	33.58
3442	NASDAQ	CHK	Wed, Nov 1, 2006	34.18	34.29	33.45	33.70
3441	NASDAQ	CHK	Tue, Oct 31, 2006	33.68	34.36	33.36	34.30
3440	NASDAQ	CHK	Mon, Oct 30, 2006	33.85	34.10	33.63	33.81
3439	NASDAQ	CHK	Fri, Oct 27, 2006	34.10	35.09	34.04	34.25
3438	NASDAQ	CHK	Thu, Oct 26, 2006	33.83	33.88	33.03	33.88
3437	NASDAQ	CHK	Wed, Oct 25, 2006	32.88	33.66	32.68	33.51
3436	NASDAQ	CHK	Tue, Oct 24, 2006	31.84	32.96	31.79	32.92
3435	NASDAQ	CHK	Mon, Oct 23, 2006	32.09	32.44	31.76	32.11
3434	NASDAQ	CHK	Fri, Oct 20, 2006	32.73	32.77	31.94	32.35
3433	NASDAQ	CHK	Thu, Oct 19, 2006	32.30	32.86	32.10	32.67
3432	NASDAQ	CHK	Wed, Oct 18, 2006	32.25	32.41	31.86	32.16
3431	NASDAQ	CHK	Tue, Oct 17, 2006	32.56	32.56	31.82	32.19
3430	NASDAQ	CHK	Mon, Oct 16, 2006	31.72	32.51	31.63	32.45
3429	NASDAQ	CHK	Fri, Oct 13, 2006	31.56	31.90	31.38	31.46
3428	NASDAQ	CHK	Thu, Oct 12, 2006	31.19	31.51	31.01	31.35
3427	NASDAQ	CHK	Wed, Oct 11, 2006	30.61	30.92	30.50	30.91
3426	NASDAQ	CHK	Tue, Oct 10, 2006	30.36	31.09	30.34	30.81
3425	NASDAQ	CHK	Mon, Oct 9, 2006	30.88	31.08	30.40	30.46
3424	NASDAQ	CHK	Fri, Oct 6, 2006	30.59	30.72	30.00	30.62
3423	NASDAQ	CHK	Thu, Oct 5, 2006	30.98	31.01	30.36	30.55
3422	NASDAQ	CHK	Wed, Oct 4, 2006	30.03	30.50	29.50	30.47
3421	NASDAQ	CHK	Tue, Oct 3, 2006	30.29	30.31	29.83	29.94
3420	NASDAQ	CHK	Mon, Oct 2, 2006	30.61	30.68	30.35	30.61
3419	NASDAQ	CHK	Fri, Sep 29, 2006	30.67	30.79	30.24	30.64
3418	NASDAQ	CHK	Thu, Sep 28, 2006	30.80	30.96	30.42	30.68
3417	NASDAQ	CHK	Wed, Sep 27, 2006	30.88	31.06	30.29	30.55
3416	NASDAQ	CHK	Tue, Sep 26, 2006	30.29	30.87	30.27	30.71
3415	NASDAQ	CHK	Mon, Sep 25, 2006	30.13	30.42	29.67	30.34
3414	NASDAQ	CHK	Fri, Sep 22, 2006	30.80	30.87	30.32	30.49
3413	NASDAQ	CHK	Thu, Sep 21, 2006	30.41	31.10	30.40	30.64
3412	NASDAQ	CHK	Wed, Sep 20, 2006	30.55	30.96	30.45	30.46
3411	NASDAQ	CHK	Tue, Sep 19, 2006	31.30	31.37	30.43	30.86
3410	NASDAQ	CHK	Mon, Sep 18, 2006	30.98	31.36	30.79	31.12
3409	NASDAQ	CHK	Fri, Sep 15, 2006	30.74	31.05	30.61	30.71
3408	NASDAQ	CHK	Thu, Sep 14, 2006	31.20	31.39	30.48	30.77
3407	NASDAQ	CHK	Wed, Sep 13, 2006	30.98	31.47	30.93	31.23
3406	NASDAQ	CHK	Tue, Sep 12, 2006	30.55	31.27	30.52	30.74
3405	NASDAQ	CHK	Mon, Sep 11, 2006	31.45	31.60	30.46	30.67
3404	NASDAQ	CHK	Fri, Sep 8, 2006	32.82	33.03	31.88	32.00
3403	NASDAQ	CHK	Thu, Sep 7, 2006	33.04	33.30	32.65	32.92
3402	NASDAQ	CHK	Wed, Sep 6, 2006	33.83	34.11	33.18	33.22
3401	NASDAQ	CHK	Tue, Sep 5, 2006	33.70	34.33	33.41	34.06
3400	NASDAQ	CHK	Fri, Sep 1, 2006	33.23	33.83	33.20	33.83
3399	NASDAQ	CHK	Thu, Aug 31, 2006	33.41	33.73	33.12	33.38
3398	NASDAQ	CHK	Wed, Aug 30, 2006	33.30	33.48	32.90	33.39
3397	NASDAQ	CHK	Tue, Aug 29, 2006	33.30	33.52	32.84	33.49
3396	NASDAQ	CHK	Mon, Aug 28, 2006	33.60	33.83	33.46	33.56
3395	NASDAQ	CHK	Fri, Aug 25, 2006	34.36	34.59	34.03	34.17
3394	NASDAQ	CHK	Thu, Aug 24, 2006	33.57	33.83	33.36	33.83
3393	NASDAQ	CHK	Wed, Aug 23, 2006	33.67	33.77	33.11	33.49
3392	NASDAQ	CHK	Tue, Aug 22, 2006	33.09	33.67	33.07	33.63
3391	NASDAQ	CHK	Mon, Aug 21, 2006	33.09	33.33	33.04	33.15
3390	NASDAQ	CHK	Fri, Aug 18, 2006	32.99	33.09	32.57	32.99
3389	NASDAQ	CHK	Thu, Aug 17, 2006	32.84	33.00	32.51	32.86
3388	NASDAQ	CHK	Wed, Aug 16, 2006	33.28	33.73	32.88	33.16
3387	NASDAQ	CHK	Tue, Aug 15, 2006	33.29	33.36	32.83	33.29
3386	NASDAQ	CHK	Mon, Aug 14, 2006	33.05	33.28	32.76	33.03
3385	NASDAQ	CHK	Fri, Aug 11, 2006	33.78	34.12	33.40	33.78
3384	NASDAQ	CHK	Thu, Aug 10, 2006	34.00	34.26	33.66	34.12
3383	NASDAQ	CHK	Wed, Aug 9, 2006	34.35	34.88	34.14	34.24
3382	NASDAQ	CHK	Tue, Aug 8, 2006	34.21	34.52	33.76	33.92
3381	NASDAQ	CHK	Mon, Aug 7, 2006	34.04	34.68	33.83	34.35
3380	NASDAQ	CHK	Fri, Aug 4, 2006	35.04	35.04	33.75	34.29
3379	NASDAQ	CHK	Thu, Aug 3, 2006	34.30	34.84	34.08	34.52
3378	NASDAQ	CHK	Wed, Aug 2, 2006	35.31	35.69	34.84	35.09
3377	NASDAQ	CHK	Tue, Aug 1, 2006	35.26	35.26	34.43	34.84
3376	NASDAQ	CHK	Mon, Jul 31, 2006	34.75	35.24	34.68	34.78
3375	NASDAQ	CHK	Fri, Jul 28, 2006	33.36	34.13	33.21	34.04
3374	NASDAQ	CHK	Thu, Jul 27, 2006	33.71	33.94	32.94	33.09
3373	NASDAQ	CHK	Wed, Jul 26, 2006	31.82	33.29	31.82	32.94
3372	NASDAQ	CHK	Tue, Jul 25, 2006	31.58	32.10	31.35	31.78
3371	NASDAQ	CHK	Mon, Jul 24, 2006	30.32	31.34	30.29	31.14
3370	NASDAQ	CHK	Fri, Jul 21, 2006	30.77	30.78	30.13	30.17
3369	NASDAQ	CHK	Thu, Jul 20, 2006	30.82	31.12	30.55	30.61
3368	NASDAQ	CHK	Wed, Jul 19, 2006	30.60	31.07	30.55	30.96
3367	NASDAQ	CHK	Tue, Jul 18, 2006	31.02	31.23	30.43	30.61
3366	NASDAQ	CHK	Mon, Jul 17, 2006	30.89	31.08	30.41	30.70
3365	NASDAQ	CHK	Fri, Jul 14, 2006	31.51	31.51	30.70	31.16
3364	NASDAQ	CHK	Thu, Jul 13, 2006	31.44	31.61	30.85	30.98
3363	NASDAQ	CHK	Wed, Jul 12, 2006	31.56	31.65	31.06	31.30
3362	NASDAQ	CHK	Tue, Jul 11, 2006	31.29	31.36	30.81	31.28
3361	NASDAQ	CHK	Mon, Jul 10, 2006	31.08	31.48	30.74	30.87
3360	NASDAQ	CHK	Fri, Jul 7, 2006	31.66	31.85	30.97	31.07
3359	NASDAQ	CHK	Thu, Jul 6, 2006	31.66	31.90	31.36	31.54
3358	NASDAQ	CHK	Wed, Jul 5, 2006	32.23	32.28	31.44	31.91
3357	NASDAQ	CHK	Mon, Jul 3, 2006	32.56	32.68	32.30	32.50
3356	NASDAQ	CHK	Fri, Jun 30, 2006	32.27	32.44	31.75	31.98
3355	NASDAQ	CHK	Thu, Jun 29, 2006	31.72	32.26	31.45	32.15
3354	NASDAQ	CHK	Wed, Jun 28, 2006	30.98	31.45	30.81	31.40
3353	NASDAQ	CHK	Tue, Jun 27, 2006	31.70	31.76	30.41	30.71
3352	NASDAQ	CHK	Mon, Jun 26, 2006	31.47	31.72	31.27	31.62
3351	NASDAQ	CHK	Fri, Jun 23, 2006	32.09	32.51	31.93	32.22
3350	NASDAQ	CHK	Thu, Jun 22, 2006	31.19	31.38	30.61	30.78
3349	NASDAQ	CHK	Wed, Jun 21, 2006	30.54	31.41	30.37	30.90
3348	NASDAQ	CHK	Tue, Jun 20, 2006	30.70	31.03	30.15	30.22
3347	NASDAQ	CHK	Mon, Jun 19, 2006	31.51	31.54	30.12	30.35
3346	NASDAQ	CHK	Fri, Jun 16, 2006	31.38	31.81	30.81	31.73
3345	NASDAQ	CHK	Thu, Jun 15, 2006	30.43	31.55	30.03	31.38
3344	NASDAQ	CHK	Wed, Jun 14, 2006	28.71	30.04	28.69	29.97
3343	NASDAQ	CHK	Tue, Jun 13, 2006	29.34	29.56	28.34	28.57
3342	NASDAQ	CHK	Mon, Jun 12, 2006	30.86	31.02	29.71	29.73
3341	NASDAQ	CHK	Fri, Jun 9, 2006	31.23	31.59	30.28	30.54
3340	NASDAQ	CHK	Thu, Jun 8, 2006	30.55	31.12	29.38	31.10
3339	NASDAQ	CHK	Wed, Jun 7, 2006	31.84	31.91	30.75	30.77
3338	NASDAQ	CHK	Tue, Jun 6, 2006	31.72	32.26	31.38	31.74
3337	NASDAQ	CHK	Mon, Jun 5, 2006	33.04	33.05	31.73	31.77
3336	NASDAQ	CHK	Fri, Jun 2, 2006	32.69	32.73	32.16	32.42
3335	NASDAQ	CHK	Thu, Jun 1, 2006	31.73	32.74	31.73	32.35
3334	NASDAQ	CHK	Wed, May 31, 2006	31.59	32.40	31.46	32.34
3333	NASDAQ	CHK	Tue, May 30, 2006	32.16	32.28	31.39	31.55
3332	NASDAQ	CHK	Fri, May 26, 2006	31.88	31.93	31.44	31.74
3331	NASDAQ	CHK	Thu, May 25, 2006	31.14	31.72	30.77	31.72
3330	NASDAQ	CHK	Wed, May 24, 2006	30.81	31.45	30.03	30.70
3329	NASDAQ	CHK	Tue, May 23, 2006	31.45	31.98	30.98	31.07
3328	NASDAQ	CHK	Mon, May 22, 2006	30.66	31.40	29.91	30.98
3327	NASDAQ	CHK	Fri, May 19, 2006	30.93	31.45	30.17	31.09
3326	NASDAQ	CHK	Thu, May 18, 2006	31.72	32.11	31.08	31.11
3325	NASDAQ	CHK	Wed, May 17, 2006	32.57	32.90	31.35	31.67
3324	NASDAQ	CHK	Tue, May 16, 2006	32.73	33.14	32.35	32.65
3323	NASDAQ	CHK	Mon, May 15, 2006	32.58	32.86	31.84	32.51
3322	NASDAQ	CHK	Fri, May 12, 2006	34.31	34.38	33.32	33.33
3321	NASDAQ	CHK	Thu, May 11, 2006	35.31	35.34	34.39	34.62
3320	NASDAQ	CHK	Wed, May 10, 2006	34.94	35.10	34.43	34.88
3319	NASDAQ	CHK	Tue, May 9, 2006	34.78	35.14	34.59	34.95
3318	NASDAQ	CHK	Mon, May 8, 2006	34.41	34.80	34.13	34.73
3317	NASDAQ	CHK	Fri, May 5, 2006	35.05	35.14	34.65	34.73
3316	NASDAQ	CHK	Thu, May 4, 2006	34.78	35.39	34.38	34.84
3315	NASDAQ	CHK	Wed, May 3, 2006	35.33	35.53	34.55	35.13
3314	NASDAQ	CHK	Tue, May 2, 2006	34.78	35.41	34.33	35.37
3313	NASDAQ	CHK	Mon, May 1, 2006	33.83	34.31	33.77	33.91
3312	NASDAQ	CHK	Fri, Apr 28, 2006	33.20	33.88	33.20	33.49
3311	NASDAQ	CHK	Thu, Apr 27, 2006	33.09	33.87	32.70	33.14
3310	NASDAQ	CHK	Wed, Apr 26, 2006	33.95	34.78	33.70	33.78
3309	NASDAQ	CHK	Tue, Apr 25, 2006	34.57	34.79	33.64	33.96
3308	NASDAQ	CHK	Mon, Apr 24, 2006	34.89	34.90	34.32	34.36
3307	NASDAQ	CHK	Fri, Apr 21, 2006	34.98	35.22	34.48	35.15
3306	NASDAQ	CHK	Thu, Apr 20, 2006	35.66	35.72	34.56	34.69
3305	NASDAQ	CHK	Wed, Apr 19, 2006	34.52	35.64	34.47	35.29
3304	NASDAQ	CHK	Tue, Apr 18, 2006	34.19	35.00	34.19	34.68
3303	NASDAQ	CHK	Mon, Apr 17, 2006	33.80	34.01	33.50	33.98
3302	NASDAQ	CHK	Thu, Apr 13, 2006	32.88	33.47	32.76	33.30
3301	NASDAQ	CHK	Wed, Apr 12, 2006	33.25	33.73	32.94	33.14
3300	NASDAQ	CHK	Tue, Apr 11, 2006	33.73	33.95	33.14	33.45
3299	NASDAQ	CHK	Mon, Apr 10, 2006	33.49	33.75	33.29	33.50
3298	NASDAQ	CHK	Fri, Apr 7, 2006	33.20	33.46	32.77	33.07
3297	NASDAQ	CHK	Thu, Apr 6, 2006	33.84	34.06	33.31	33.60
3296	NASDAQ	CHK	Wed, Apr 5, 2006	33.79	34.20	33.58	33.75
3295	NASDAQ	CHK	Tue, Apr 4, 2006	33.25	33.82	33.04	33.76
3294	NASDAQ	CHK	Mon, Apr 3, 2006	33.48	33.91	33.30	33.39
3293	NASDAQ	CHK	Fri, Mar 31, 2006	33.18	33.33	32.64	33.21
3292	NASDAQ	CHK	Thu, Mar 30, 2006	34.10	34.36	33.38	33.51
3291	NASDAQ	CHK	Wed, Mar 29, 2006	33.57	34.08	33.47	33.94
3290	NASDAQ	CHK	Tue, Mar 28, 2006	33.51	33.86	33.41	33.57
3289	NASDAQ	CHK	Mon, Mar 27, 2006	32.76	33.31	32.51	33.30
3288	NASDAQ	CHK	Fri, Mar 24, 2006	32.51	33.29	32.50	32.99
3287	NASDAQ	CHK	Thu, Mar 23, 2006	32.18	32.71	32.17	32.48
3286	NASDAQ	CHK	Wed, Mar 22, 2006	31.70	32.40	31.56	31.92
3285	NASDAQ	CHK	Tue, Mar 21, 2006	31.66	32.14	31.46	31.52
3284	NASDAQ	CHK	Mon, Mar 20, 2006	33.09	33.23	31.79	31.89
3283	NASDAQ	CHK	Fri, Mar 17, 2006	33.55	33.56	33.15	33.30
3282	NASDAQ	CHK	Thu, Mar 16, 2006	32.85	33.74	32.64	33.55
3281	NASDAQ	CHK	Wed, Mar 15, 2006	32.58	32.93	32.45	32.88
3280	NASDAQ	CHK	Tue, Mar 14, 2006	32.28	32.89	32.04	32.89
3279	NASDAQ	CHK	Mon, Mar 13, 2006	31.98	32.33	31.88	32.14
3278	NASDAQ	CHK	Fri, Mar 10, 2006	31.25	32.30	31.09	31.72
3277	NASDAQ	CHK	Thu, Mar 9, 2006	31.95	32.40	31.40	31.44
3276	NASDAQ	CHK	Wed, Mar 8, 2006	31.23	31.96	30.88	31.73
3275	NASDAQ	CHK	Tue, Mar 7, 2006	32.07	32.14	31.28	31.56
3274	NASDAQ	CHK	Mon, Mar 6, 2006	32.85	32.99	31.77	32.04
3273	NASDAQ	CHK	Fri, Mar 3, 2006	33.31	33.78	33.26	33.31
3272	NASDAQ	CHK	Thu, Mar 2, 2006	32.41	33.57	32.30	33.51
3271	NASDAQ	CHK	Wed, Mar 1, 2006	31.65	32.21	31.45	32.17
3270	NASDAQ	CHK	Tue, Feb 28, 2006	31.56	31.61	30.77	31.39
3269	NASDAQ	CHK	Mon, Feb 27, 2006	31.45	31.58	30.52	30.57
3268	NASDAQ	CHK	Fri, Feb 24, 2006	32.36	32.49	31.66	31.72
3267	NASDAQ	CHK	Thu, Feb 23, 2006	31.14	31.56	30.71	30.98
3266	NASDAQ	CHK	Wed, Feb 22, 2006	31.84	32.02	31.09	31.19
3265	NASDAQ	CHK	Tue, Feb 21, 2006	32.46	32.67	31.86	32.44
3264	NASDAQ	CHK	Fri, Feb 17, 2006	31.77	31.92	30.92	31.43
3263	NASDAQ	CHK	Thu, Feb 16, 2006	30.71	31.51	30.71	31.25
3262	NASDAQ	CHK	Wed, Feb 15, 2006	30.98	31.51	30.26	30.61
3261	NASDAQ	CHK	Tue, Feb 14, 2006	29.82	30.69	29.34	30.49
3260	NASDAQ	CHK	Mon, Feb 13, 2006	30.66	31.11	29.99	30.32
3259	NASDAQ	CHK	Fri, Feb 10, 2006	32.30	32.56	30.90	31.31
3258	NASDAQ	CHK	Thu, Feb 9, 2006	33.64	34.10	32.03	32.15
3257	NASDAQ	CHK	Wed, Feb 8, 2006	33.76	33.82	32.67	33.38
3256	NASDAQ	CHK	Tue, Feb 7, 2006	35.24	35.24	33.30	33.55
3255	NASDAQ	CHK	Mon, Feb 6, 2006	35.96	36.54	35.60	35.73
3254	NASDAQ	CHK	Fri, Feb 3, 2006	35.64	35.89	35.07	35.53
3253	NASDAQ	CHK	Thu, Feb 2, 2006	35.73	36.37	35.15	35.48
3252	NASDAQ	CHK	Wed, Feb 1, 2006	37.32	37.61	35.83	36.01
3251	NASDAQ	CHK	Tue, Jan 31, 2006	36.04	37.14	36.00	37.04
3250	NASDAQ	CHK	Mon, Jan 30, 2006	34.84	36.55	34.66	36.32
3249	NASDAQ	CHK	Fri, Jan 27, 2006	34.04	34.55	33.83	34.19
3248	NASDAQ	CHK	Thu, Jan 26, 2006	33.83	33.84	32.78	33.40
3247	NASDAQ	CHK	Wed, Jan 25, 2006	35.52	35.65	33.88	34.04
3246	NASDAQ	CHK	Tue, Jan 24, 2006	34.79	35.55	34.62	35.51
3245	NASDAQ	CHK	Mon, Jan 23, 2006	35.28	35.40	34.62	35.11
3244	NASDAQ	CHK	Fri, Jan 20, 2006	35.77	36.09	35.28	35.45
3243	NASDAQ	CHK	Thu, Jan 19, 2006	34.50	35.32	34.48	35.12
3242	NASDAQ	CHK	Wed, Jan 18, 2006	35.21	35.48	34.25	34.62
3241	NASDAQ	CHK	Tue, Jan 17, 2006	35.07	35.42	34.80	35.35
3240	NASDAQ	CHK	Fri, Jan 13, 2006	33.87	34.49	33.78	34.40
3239	NASDAQ	CHK	Thu, Jan 12, 2006	34.53	35.15	34.04	34.15
3238	NASDAQ	CHK	Wed, Jan 11, 2006	34.57	35.63	34.00	34.13
3237	NASDAQ	CHK	Tue, Jan 10, 2006	33.82	34.73	33.57	34.61
3236	NASDAQ	CHK	Mon, Jan 9, 2006	34.20	34.31	33.45	33.65
3235	NASDAQ	CHK	Fri, Jan 6, 2006	34.52	34.62	33.99	34.10
3234	NASDAQ	CHK	Thu, Jan 5, 2006	34.53	34.72	33.33	33.94
3233	NASDAQ	CHK	Wed, Jan 4, 2006	34.57	35.14	34.20	34.94
3232	NASDAQ	CHK	Tue, Jan 3, 2006	33.94	34.90	33.83	34.88
3231	NASDAQ	CHK	Fri, Dec 30, 2005	33.04	33.71	32.78	33.55
3230	NASDAQ	CHK	Thu, Dec 29, 2005	33.18	33.82	32.72	33.21
3229	NASDAQ	CHK	Wed, Dec 28, 2005	32.48	33.44	32.35	33.14
3228	NASDAQ	CHK	Tue, Dec 27, 2005	33.30	33.37	32.17	32.44
3227	NASDAQ	CHK	Fri, Dec 23, 2005	33.82	34.04	33.26	34.00
3226	NASDAQ	CHK	Thu, Dec 22, 2005	35.26	35.33	33.92	34.21
3225	NASDAQ	CHK	Wed, Dec 21, 2005	34.73	35.03	34.47	34.87
3224	NASDAQ	CHK	Tue, Dec 20, 2005	33.94	34.50	33.82	34.35
3223	NASDAQ	CHK	Mon, Dec 19, 2005	34.49	34.56	33.74	33.93
3222	NASDAQ	CHK	Fri, Dec 16, 2005	35.26	35.26	33.75	33.89
3221	NASDAQ	CHK	Thu, Dec 15, 2005	35.26	36.21	34.99	35.26
3220	NASDAQ	CHK	Wed, Dec 14, 2005	34.94	35.81	34.48	35.65
3219	NASDAQ	CHK	Tue, Dec 13, 2005	35.10	35.90	34.95	35.09
3218	NASDAQ	CHK	Mon, Dec 12, 2005	33.82	34.39	33.52	34.33
3217	NASDAQ	CHK	Fri, Dec 9, 2005	33.38	34.25	32.67	32.93
3216	NASDAQ	CHK	Thu, Dec 8, 2005	32.03	33.36	31.56	33.26
3215	NASDAQ	CHK	Wed, Dec 7, 2005	33.46	33.68	32.46	32.62
3214	NASDAQ	CHK	Tue, Dec 6, 2005	32.77	33.34	32.50	33.04
3213	NASDAQ	CHK	Mon, Dec 5, 2005	32.96	33.80	32.81	32.94
3212	NASDAQ	CHK	Fri, Dec 2, 2005	32.03	32.36	31.64	32.27
3211	NASDAQ	CHK	Thu, Dec 1, 2005	30.98	31.78	30.91	31.68
3210	NASDAQ	CHK	Wed, Nov 30, 2005	30.08	30.72	29.94	30.61
3209	NASDAQ	CHK	Tue, Nov 29, 2005	29.76	30.09	29.31	29.72
3208	NASDAQ	CHK	Mon, Nov 28, 2005	30.77	30.91	29.34	29.43
3207	NASDAQ	CHK	Fri, Nov 25, 2005	30.92	31.18	30.83	31.08
3206	NASDAQ	CHK	Wed, Nov 23, 2005	31.68	31.70	30.71	30.74
3205	NASDAQ	CHK	Tue, Nov 22, 2005	31.72	32.09	31.62	31.74
3204	NASDAQ	CHK	Mon, Nov 21, 2005	30.72	31.37	30.72	31.34
3203	NASDAQ	CHK	Fri, Nov 18, 2005	30.91	30.92	30.03	30.37
3202	NASDAQ	CHK	Thu, Nov 17, 2005	31.65	31.88	30.78	31.02
3201	NASDAQ	CHK	Wed, Nov 16, 2005	29.92	31.08	29.77	31.08
3200	NASDAQ	CHK	Tue, Nov 15, 2005	29.50	30.64	29.35	29.66
3199	NASDAQ	CHK	Mon, Nov 14, 2005	29.66	30.11	29.01	29.50
3198	NASDAQ	CHK	Fri, Nov 11, 2005	28.49	29.16	28.27	29.00
3197	NASDAQ	CHK	Thu, Nov 10, 2005	29.45	29.46	28.11	28.26
3196	NASDAQ	CHK	Wed, Nov 9, 2005	30.29	30.71	29.55	29.67
3195	NASDAQ	CHK	Tue, Nov 8, 2005	30.06	30.93	29.62	30.26
3194	NASDAQ	CHK	Mon, Nov 7, 2005	29.61	30.26	29.13	29.96
3193	NASDAQ	CHK	Fri, Nov 4, 2005	32.13	32.26	29.60	30.70
3192	NASDAQ	CHK	Thu, Nov 3, 2005	31.56	32.75	31.36	32.26
3191	NASDAQ	CHK	Wed, Nov 2, 2005	31.44	32.88	31.29	31.77
3190	NASDAQ	CHK	Tue, Nov 1, 2005	32.99	33.50	32.83	32.88
3189	NASDAQ	CHK	Mon, Oct 31, 2005	33.36	34.04	32.81	33.94
3188	NASDAQ	CHK	Fri, Oct 28, 2005	32.94	33.31	31.72	33.23
3187	NASDAQ	CHK	Thu, Oct 27, 2005	34.08	34.36	32.62	32.86
3186	NASDAQ	CHK	Wed, Oct 26, 2005	34.15	35.87	33.75	33.99
3185	NASDAQ	CHK	Tue, Oct 25, 2005	32.84	34.71	32.77	34.30
3184	NASDAQ	CHK	Mon, Oct 24, 2005	30.87	32.52	30.77	32.48
3183	NASDAQ	CHK	Fri, Oct 21, 2005	31.08	31.91	30.13	31.24
3182	NASDAQ	CHK	Thu, Oct 20, 2005	32.99	33.21	30.79	31.33
3181	NASDAQ	CHK	Wed, Oct 19, 2005	33.04	33.73	31.19	33.56
3180	NASDAQ	CHK	Tue, Oct 18, 2005	34.57	35.05	33.04	33.15
3179	NASDAQ	CHK	Mon, Oct 17, 2005	35.84	36.03	34.91	35.36
3178	NASDAQ	CHK	Fri, Oct 14, 2005	32.68	34.57	32.14	34.47
3177	NASDAQ	CHK	Thu, Oct 13, 2005	34.87	34.87	31.93	33.57
3176	NASDAQ	CHK	Wed, Oct 12, 2005	36.74	36.84	34.61	35.08
3175	NASDAQ	CHK	Tue, Oct 11, 2005	35.21	36.65	34.97	36.55
3174	NASDAQ	CHK	Mon, Oct 10, 2005	36.37	36.42	33.83	34.52
3173	NASDAQ	CHK	Fri, Oct 7, 2005	34.91	36.09	34.52	35.99
3172	NASDAQ	CHK	Thu, Oct 6, 2005	35.84	36.26	33.49	34.45
3171	NASDAQ	CHK	Wed, Oct 5, 2005	40.44	40.48	37.38	37.53
3170	NASDAQ	CHK	Tue, Oct 4, 2005	42.50	42.50	39.65	39.77
3169	NASDAQ	CHK	Mon, Oct 3, 2005	40.89	41.13	40.71	41.08
3168	NASDAQ	CHK	Fri, Sep 30, 2005	40.76	41.21	40.18	40.44
3167	NASDAQ	CHK	Thu, Sep 29, 2005	40.33	40.77	39.98	40.76
3166	NASDAQ	CHK	Wed, Sep 28, 2005	39.06	39.97	38.32	39.88
3165	NASDAQ	CHK	Tue, Sep 27, 2005	38.73	38.95	38.21	38.70
3164	NASDAQ	CHK	Mon, Sep 26, 2005	36.79	38.69	36.64	38.61
3163	NASDAQ	CHK	Fri, Sep 23, 2005	37.90	37.90	36.91	37.24
3162	NASDAQ	CHK	Thu, Sep 22, 2005	39.75	39.91	36.79	37.90
3161	NASDAQ	CHK	Wed, Sep 21, 2005	38.32	38.69	37.90	38.50
3160	NASDAQ	CHK	Tue, Sep 20, 2005	37.37	37.58	36.76	36.94
3159	NASDAQ	CHK	Mon, Sep 19, 2005	36.61	37.85	36.53	37.82
3158	NASDAQ	CHK	Fri, Sep 16, 2005	35.51	35.85	35.22	35.80
3157	NASDAQ	CHK	Thu, Sep 15, 2005	35.91	36.21	34.93	35.56
3156	NASDAQ	CHK	Wed, Sep 14, 2005	34.54	35.58	34.41	35.55
3155	NASDAQ	CHK	Tue, Sep 13, 2005	34.68	34.94	34.04	34.16
3154	NASDAQ	CHK	Mon, Sep 12, 2005	35.35	35.35	34.20	34.59
3153	NASDAQ	CHK	Fri, Sep 9, 2005	34.89	35.42	34.14	35.26
3152	NASDAQ	CHK	Thu, Sep 8, 2005	34.41	34.89	33.84	34.59
3151	NASDAQ	CHK	Wed, Sep 7, 2005	34.66	35.36	34.31	34.98
3150	NASDAQ	CHK	Tue, Sep 6, 2005	33.62	34.44	32.92	34.35
3149	NASDAQ	CHK	Fri, Sep 2, 2005	34.36	34.66	33.06	33.60
3148	NASDAQ	CHK	Thu, Sep 1, 2005	34.31	35.06	33.83	34.73
3147	NASDAQ	CHK	Wed, Aug 31, 2005	32.50	34.17	32.25	33.42
3146	NASDAQ	CHK	Tue, Aug 30, 2005	30.66	32.28	30.66	32.00
3145	NASDAQ	CHK	Mon, Aug 29, 2005	30.66	30.92	30.18	30.54
3144	NASDAQ	CHK	Fri, Aug 26, 2005	30.24	30.26	29.44	29.72
3143	NASDAQ	CHK	Thu, Aug 25, 2005	29.69	30.18	29.52	30.11
3142	NASDAQ	CHK	Wed, Aug 24, 2005	29.21	30.11	29.12	29.85
3141	NASDAQ	CHK	Tue, Aug 23, 2005	29.07	29.51	28.81	28.99
3140	NASDAQ	CHK	Mon, Aug 22, 2005	28.81	29.39	28.71	28.85
3139	NASDAQ	CHK	Fri, Aug 19, 2005	28.60	28.84	28.54	28.60
3138	NASDAQ	CHK	Thu, Aug 18, 2005	27.49	28.17	27.28	28.10
3137	NASDAQ	CHK	Wed, Aug 17, 2005	29.18	29.96	27.85	28.27
3136	NASDAQ	CHK	Tue, Aug 16, 2005	30.05	30.10	29.13	29.19
3135	NASDAQ	CHK	Mon, Aug 15, 2005	30.68	30.81	29.96	30.05
3134	NASDAQ	CHK	Fri, Aug 12, 2005	30.69	30.83	30.42	30.75
3133	NASDAQ	CHK	Thu, Aug 11, 2005	30.82	31.08	30.27	30.63
3132	NASDAQ	CHK	Wed, Aug 10, 2005	30.27	30.98	29.81	30.65
3131	NASDAQ	CHK	Tue, Aug 9, 2005	30.28	30.46	29.71	30.16
3130	NASDAQ	CHK	Mon, Aug 8, 2005	30.98	31.08	30.10	30.20
3129	NASDAQ	CHK	Fri, Aug 5, 2005	31.33	31.33	29.55	30.10
3128	NASDAQ	CHK	Thu, Aug 4, 2005	28.97	29.92	28.82	29.92
3127	NASDAQ	CHK	Wed, Aug 3, 2005	29.09	29.31	28.54	28.82
3126	NASDAQ	CHK	Tue, Aug 2, 2005	28.54	28.86	28.28	28.76
3125	NASDAQ	CHK	Mon, Aug 1, 2005	28.12	28.13	27.80	28.07
3124	NASDAQ	CHK	Fri, Jul 29, 2005	27.75	28.14	27.50	27.60
3123	NASDAQ	CHK	Thu, Jul 28, 2005	27.33	27.49	27.05	27.36
3122	NASDAQ	CHK	Wed, Jul 27, 2005	27.16	27.22	26.64	27.18
3121	NASDAQ	CHK	Tue, Jul 26, 2005	27.40	27.43	26.97	27.19
3120	NASDAQ	CHK	Mon, Jul 25, 2005	27.03	27.42	26.74	27.22
3119	NASDAQ	CHK	Fri, Jul 22, 2005	26.43	27.02	26.43	26.99
3118	NASDAQ	CHK	Thu, Jul 21, 2005	26.35	26.44	25.98	26.27
3117	NASDAQ	CHK	Wed, Jul 20, 2005	26.34	26.41	25.74	26.38
3116	NASDAQ	CHK	Tue, Jul 19, 2005	25.55	26.32	25.53	26.22
3115	NASDAQ	CHK	Mon, Jul 18, 2005	25.67	25.74	25.32	25.39
3114	NASDAQ	CHK	Fri, Jul 15, 2005	26.29	26.45	25.74	25.90
3113	NASDAQ	CHK	Thu, Jul 14, 2005	27.28	27.32	25.68	25.87
3112	NASDAQ	CHK	Wed, Jul 13, 2005	27.34	27.43	26.65	26.87
3111	NASDAQ	CHK	Tue, Jul 12, 2005	26.95	27.37	26.84	27.34
3110	NASDAQ	CHK	Mon, Jul 11, 2005	26.31	26.66	26.11	26.63
3109	NASDAQ	CHK	Fri, Jul 8, 2005	27.17	27.22	26.21	26.58
3108	NASDAQ	CHK	Thu, Jul 7, 2005	26.17	26.92	26.17	26.90
3107	NASDAQ	CHK	Wed, Jul 6, 2005	27.38	27.53	26.30	26.68
3106	NASDAQ	CHK	Tue, Jul 5, 2005	26.27	27.06	25.94	27.06
3105	NASDAQ	CHK	Fri, Jul 1, 2005	24.54	25.58	24.21	25.57
3104	NASDAQ	CHK	Thu, Jun 30, 2005	24.23	24.58	23.95	24.10
3103	NASDAQ	CHK	Wed, Jun 29, 2005	23.99	24.37	23.79	24.20
3102	NASDAQ	CHK	Tue, Jun 28, 2005	24.60	24.60	24.00	24.02
3101	NASDAQ	CHK	Mon, Jun 27, 2005	24.53	24.83	24.47	24.58
3100	NASDAQ	CHK	Fri, Jun 24, 2005	24.75	24.91	24.21	24.36
3099	NASDAQ	CHK	Thu, Jun 23, 2005	24.53	24.84	24.37	24.70
3098	NASDAQ	CHK	Wed, Jun 22, 2005	24.44	24.69	23.99	24.40
3097	NASDAQ	CHK	Tue, Jun 21, 2005	25.10	25.17	24.02	24.20
3096	NASDAQ	CHK	Mon, Jun 20, 2005	25.34	25.37	24.74	25.10
3095	NASDAQ	CHK	Fri, Jun 17, 2005	24.32	24.78	24.32	24.73
3094	NASDAQ	CHK	Thu, Jun 16, 2005	23.97	24.27	23.75	24.22
3093	NASDAQ	CHK	Wed, Jun 15, 2005	23.55	23.92	23.42	23.82
3092	NASDAQ	CHK	Tue, Jun 14, 2005	23.63	23.68	23.35	23.40
3091	NASDAQ	CHK	Mon, Jun 13, 2005	22.72	23.57	22.58	23.51
3090	NASDAQ	CHK	Fri, Jun 10, 2005	23.05	23.08	22.53	22.73
3089	NASDAQ	CHK	Thu, Jun 9, 2005	22.50	22.99	22.31	22.98
3088	NASDAQ	CHK	Wed, Jun 8, 2005	22.09	22.73	22.07	22.29
3087	NASDAQ	CHK	Tue, Jun 7, 2005	22.71	22.71	21.94	22.13
3086	NASDAQ	CHK	Mon, Jun 6, 2005	22.44	22.64	22.30	22.52
3085	NASDAQ	CHK	Fri, Jun 3, 2005	22.15	22.50	22.10	22.20
3084	NASDAQ	CHK	Thu, Jun 2, 2005	21.88	22.28	21.76	22.24
3083	NASDAQ	CHK	Wed, Jun 1, 2005	21.73	22.02	21.50	21.98
3082	NASDAQ	CHK	Tue, May 31, 2005	21.44	21.69	21.14	21.64
3081	NASDAQ	CHK	Fri, May 27, 2005	21.13	21.47	21.00	21.45
3080	NASDAQ	CHK	Thu, May 26, 2005	21.04	21.14	20.80	21.04
3079	NASDAQ	CHK	Wed, May 25, 2005	21.11	21.14	20.72	21.04
3078	NASDAQ	CHK	Tue, May 24, 2005	20.99	21.06	20.75	21.05
3077	NASDAQ	CHK	Mon, May 23, 2005	20.30	20.93	20.30	20.89
3076	NASDAQ	CHK	Fri, May 20, 2005	20.46	20.62	20.28	20.38
3075	NASDAQ	CHK	Thu, May 19, 2005	20.10	20.48	20.03	20.37
3074	NASDAQ	CHK	Wed, May 18, 2005	20.11	20.50	19.80	20.13
3073	NASDAQ	CHK	Tue, May 17, 2005	19.32	20.08	19.32	20.08
3072	NASDAQ	CHK	Mon, May 16, 2005	19.29	19.63	18.76	19.35
3071	NASDAQ	CHK	Fri, May 13, 2005	20.72	20.78	19.29	19.45
3070	NASDAQ	CHK	Thu, May 12, 2005	21.49	21.56	20.35	20.35
3069	NASDAQ	CHK	Wed, May 11, 2005	21.30	21.62	21.14	21.62
3068	NASDAQ	CHK	Tue, May 10, 2005	21.81	21.92	21.44	21.46
3067	NASDAQ	CHK	Mon, May 9, 2005	21.41	21.92	21.20	21.79
3066	NASDAQ	CHK	Fri, May 6, 2005	21.30	21.42	21.13	21.14
3065	NASDAQ	CHK	Thu, May 5, 2005	20.78	21.37	20.78	21.12
3064	NASDAQ	CHK	Wed, May 4, 2005	20.20	20.84	20.14	20.77
3063	NASDAQ	CHK	Tue, May 3, 2005	20.98	20.98	20.09	20.11
3062	NASDAQ	CHK	Mon, May 2, 2005	20.45	21.13	20.29	21.13
3061	NASDAQ	CHK	Fri, Apr 29, 2005	20.71	20.77	20.18	20.34
3060	NASDAQ	CHK	Thu, Apr 28, 2005	20.88	20.89	20.17	20.32
3059	NASDAQ	CHK	Wed, Apr 27, 2005	21.64	21.65	20.86	20.93
3058	NASDAQ	CHK	Tue, Apr 26, 2005	22.09	22.10	21.72	21.74
3057	NASDAQ	CHK	Mon, Apr 25, 2005	21.97	22.20	21.91	22.09
3056	NASDAQ	CHK	Fri, Apr 22, 2005	21.65	22.02	21.33	21.82
3055	NASDAQ	CHK	Thu, Apr 21, 2005	20.89	21.59	20.83	21.57
3054	NASDAQ	CHK	Wed, Apr 20, 2005	21.64	21.99	20.74	20.89
3053	NASDAQ	CHK	Tue, Apr 19, 2005	21.14	21.65	21.06	21.41
3052	NASDAQ	CHK	Mon, Apr 18, 2005	20.49	20.80	19.44	20.67
3051	NASDAQ	CHK	Fri, Apr 15, 2005	21.15	21.31	20.30	20.46
3050	NASDAQ	CHK	Thu, Apr 14, 2005	21.20	21.73	20.99	21.18
3049	NASDAQ	CHK	Wed, Apr 13, 2005	22.31	22.31	20.89	20.95
3048	NASDAQ	CHK	Tue, Apr 12, 2005	22.58	22.69	21.85	21.91
3047	NASDAQ	CHK	Mon, Apr 11, 2005	22.54	22.60	22.20	22.58
3046	NASDAQ	CHK	Fri, Apr 8, 2005	22.90	22.98	22.41	22.43
3045	NASDAQ	CHK	Thu, Apr 7, 2005	23.96	23.98	22.94	23.03
3044	NASDAQ	CHK	Wed, Apr 6, 2005	23.50	23.91	23.28	23.69
3043	NASDAQ	CHK	Tue, Apr 5, 2005	23.90	24.05	23.40	23.50
3042	NASDAQ	CHK	Mon, Apr 4, 2005	24.29	24.34	23.49	23.90
3041	NASDAQ	CHK	Fri, Apr 1, 2005	23.47	23.81	23.35	23.78
3040	NASDAQ	CHK	Thu, Mar 31, 2005	22.71	23.22	22.62	23.20
3039	NASDAQ	CHK	Wed, Mar 30, 2005	21.85	22.15	21.22	22.12
3038	NASDAQ	CHK	Tue, Mar 29, 2005	22.51	22.73	21.72	21.81
3037	NASDAQ	CHK	Mon, Mar 28, 2005	22.32	22.72	21.99	22.51
3036	NASDAQ	CHK	Thu, Mar 24, 2005	22.10	22.47	21.68	22.27
3035	NASDAQ	CHK	Wed, Mar 23, 2005	22.94	22.95	21.21	21.90
3034	NASDAQ	CHK	Tue, Mar 22, 2005	23.78	24.03	23.05	23.05
3033	NASDAQ	CHK	Mon, Mar 21, 2005	24.16	24.26	23.60	23.75
3032	NASDAQ	CHK	Fri, Mar 18, 2005	24.17	24.32	23.79	24.09
3031	NASDAQ	CHK	Thu, Mar 17, 2005	23.48	24.06	23.47	24.00
3030	NASDAQ	CHK	Wed, Mar 16, 2005	23.11	23.53	22.84	23.15
3029	NASDAQ	CHK	Tue, Mar 15, 2005	23.45	23.62	23.05	23.11
3028	NASDAQ	CHK	Mon, Mar 14, 2005	23.39	23.47	22.69	23.29
3027	NASDAQ	CHK	Fri, Mar 11, 2005	22.99	23.60	22.68	23.22
3026	NASDAQ	CHK	Thu, Mar 10, 2005	23.73	24.17	22.57	22.99
3025	NASDAQ	CHK	Wed, Mar 9, 2005	24.42	24.63	23.64	23.81
3024	NASDAQ	CHK	Tue, Mar 8, 2005	24.43	25.00	24.16	24.22
3023	NASDAQ	CHK	Mon, Mar 7, 2005	24.79	25.00	23.95	24.34
3022	NASDAQ	CHK	Fri, Mar 4, 2005	24.26	24.74	24.10	24.61
3021	NASDAQ	CHK	Thu, Mar 3, 2005	23.89	24.10	23.66	23.84
3020	NASDAQ	CHK	Wed, Mar 2, 2005	22.41	23.31	22.36	23.28
3019	NASDAQ	CHK	Tue, Mar 1, 2005	22.93	23.20	22.10	22.36
3018	NASDAQ	CHK	Mon, Feb 28, 2005	23.28	23.89	22.05	22.93
3017	NASDAQ	CHK	Fri, Feb 25, 2005	21.73	23.01	21.65	22.80
3016	NASDAQ	CHK	Thu, Feb 24, 2005	21.40	21.64	21.12	21.50
3015	NASDAQ	CHK	Wed, Feb 23, 2005	21.60	21.82	21.08	21.30
3014	NASDAQ	CHK	Tue, Feb 22, 2005	20.99	21.47	20.82	20.96
3013	NASDAQ	CHK	Fri, Feb 18, 2005	20.11	20.96	20.08	20.94
3012	NASDAQ	CHK	Thu, Feb 17, 2005	20.69	20.85	20.03	20.04
3011	NASDAQ	CHK	Wed, Feb 16, 2005	19.94	20.72	19.94	20.68
3010	NASDAQ	CHK	Tue, Feb 15, 2005	20.09	20.22	19.70	19.98
3009	NASDAQ	CHK	Mon, Feb 14, 2005	20.06	20.25	19.95	20.03
3008	NASDAQ	CHK	Fri, Feb 11, 2005	19.88	20.07	19.66	19.89
3007	NASDAQ	CHK	Thu, Feb 10, 2005	19.45	19.98	19.27	19.88
3006	NASDAQ	CHK	Wed, Feb 9, 2005	19.14	19.44	19.05	19.20
3005	NASDAQ	CHK	Tue, Feb 8, 2005	18.95	19.29	18.88	19.21
3004	NASDAQ	CHK	Mon, Feb 7, 2005	19.21	19.29	18.86	19.04
3003	NASDAQ	CHK	Fri, Feb 4, 2005	18.97	19.35	18.87	19.26
3002	NASDAQ	CHK	Thu, Feb 3, 2005	19.08	19.08	18.69	18.84
3001	NASDAQ	CHK	Wed, Feb 2, 2005	18.67	19.19	18.64	19.13
3000	NASDAQ	CHK	Tue, Feb 1, 2005	18.66	19.02	18.61	18.74
2999	NASDAQ	CHK	Mon, Jan 31, 2005	18.28	18.67	18.08	18.58
2998	NASDAQ	CHK	Fri, Jan 28, 2005	18.50	18.50	18.23	18.35
2997	NASDAQ	CHK	Thu, Jan 27, 2005	18.29	18.53	18.23	18.51
2996	NASDAQ	CHK	Wed, Jan 26, 2005	18.17	18.32	18.09	18.27
2995	NASDAQ	CHK	Tue, Jan 25, 2005	17.98	18.13	17.93	18.12
2994	NASDAQ	CHK	Mon, Jan 24, 2005	17.97	18.06	17.90	17.97
2993	NASDAQ	CHK	Fri, Jan 21, 2005	17.68	18.08	17.59	17.82
2992	NASDAQ	CHK	Thu, Jan 20, 2005	17.75	17.82	17.29	17.57
2991	NASDAQ	CHK	Wed, Jan 19, 2005	17.82	18.07	17.70	17.75
2990	NASDAQ	CHK	Tue, Jan 18, 2005	17.68	17.96	17.67	17.81
2989	NASDAQ	CHK	Fri, Jan 14, 2005	17.29	17.54	17.13	17.53
2988	NASDAQ	CHK	Thu, Jan 13, 2005	17.13	17.35	17.05	17.21
2987	NASDAQ	CHK	Wed, Jan 12, 2005	17.06	17.13	16.84	17.13
2986	NASDAQ	CHK	Tue, Jan 11, 2005	16.92	17.20	16.87	17.05
2985	NASDAQ	CHK	Mon, Jan 10, 2005	16.86	17.14	16.76	16.97
2984	NASDAQ	CHK	Fri, Jan 7, 2005	16.68	16.68	16.21	16.52
2983	NASDAQ	CHK	Thu, Jan 6, 2005	16.07	16.81	16.07	16.53
2982	NASDAQ	CHK	Wed, Jan 5, 2005	16.28	16.33	15.92	16.09
2981	NASDAQ	CHK	Tue, Jan 4, 2005	16.44	16.62	16.13	16.22
2980	NASDAQ	CHK	Mon, Jan 3, 2005	16.99	17.15	16.23	16.36
2979	NASDAQ	CHK	Fri, Dec 31, 2004	17.26	17.53	17.24	17.44
2978	NASDAQ	CHK	Thu, Dec 30, 2004	17.48	17.57	17.23	17.31
2977	NASDAQ	CHK	Wed, Dec 29, 2004	17.63	17.73	17.40	17.57
2976	NASDAQ	CHK	Tue, Dec 28, 2004	17.30	17.62	17.26	17.59
2975	NASDAQ	CHK	Mon, Dec 27, 2004	17.61	17.61	17.22	17.27
2974	NASDAQ	CHK	Thu, Dec 23, 2004	17.57	17.79	17.56	17.61
2973	NASDAQ	CHK	Wed, Dec 22, 2004	18.02	18.07	17.27	17.53
2972	NASDAQ	CHK	Tue, Dec 21, 2004	18.17	18.17	17.82	18.00
2971	NASDAQ	CHK	Mon, Dec 20, 2004	18.14	18.19	17.98	18.07
2970	NASDAQ	CHK	Fri, Dec 17, 2004	17.92	18.14	17.84	18.14
2969	NASDAQ	CHK	Thu, Dec 16, 2004	17.99	18.16	17.68	17.81
2968	NASDAQ	CHK	Wed, Dec 15, 2004	17.53	17.99	17.44	17.99
2967	NASDAQ	CHK	Tue, Dec 14, 2004	17.44	17.58	17.23	17.44
2966	NASDAQ	CHK	Mon, Dec 13, 2004	16.92	17.34	16.90	17.31
2965	NASDAQ	CHK	Fri, Dec 10, 2004	16.92	17.02	16.77	16.81
2964	NASDAQ	CHK	Thu, Dec 9, 2004	17.00	17.29	16.85	16.90
2963	NASDAQ	CHK	Wed, Dec 8, 2004	17.19	17.19	16.55	16.90
2962	NASDAQ	CHK	Tue, Dec 7, 2004	17.88	17.88	17.02	17.18
2961	NASDAQ	CHK	Mon, Dec 6, 2004	17.70	17.91	17.55	17.82
2960	NASDAQ	CHK	Fri, Dec 3, 2004	17.48	17.97	17.34	17.70
2959	NASDAQ	CHK	Thu, Dec 2, 2004	18.33	18.50	17.57	17.59
2958	NASDAQ	CHK	Wed, Dec 1, 2004	18.92	18.93	18.41	18.69
2957	NASDAQ	CHK	Tue, Nov 30, 2004	18.98	19.21	18.91	19.03
2956	NASDAQ	CHK	Mon, Nov 29, 2004	19.35	19.36	18.66	18.95
2955	NASDAQ	CHK	Fri, Nov 26, 2004	19.09	19.32	19.06	19.17
2954	NASDAQ	CHK	Wed, Nov 24, 2004	18.90	19.08	18.45	19.06
2953	NASDAQ	CHK	Tue, Nov 23, 2004	18.58	18.89	18.47	18.70
2952	NASDAQ	CHK	Mon, Nov 22, 2004	18.23	18.58	18.15	18.55
2951	NASDAQ	CHK	Fri, Nov 19, 2004	18.03	18.25	17.91	18.15
2950	NASDAQ	CHK	Thu, Nov 18, 2004	17.95	18.09	17.80	18.00
2949	NASDAQ	CHK	Wed, Nov 17, 2004	17.87	17.98	17.72	17.96
2948	NASDAQ	CHK	Tue, Nov 16, 2004	17.76	18.04	17.73	17.84
2947	NASDAQ	CHK	Mon, Nov 15, 2004	18.22	18.22	17.53	17.86
2946	NASDAQ	CHK	Fri, Nov 12, 2004	17.82	18.22	17.75	18.17
2945	NASDAQ	CHK	Thu, Nov 11, 2004	17.97	17.97	17.72	17.76
2944	NASDAQ	CHK	Wed, Nov 10, 2004	17.51	18.00	17.51	18.00
2943	NASDAQ	CHK	Tue, Nov 9, 2004	17.68	17.68	17.50	17.58
2942	NASDAQ	CHK	Mon, Nov 8, 2004	17.97	17.97	17.67	17.67
2941	NASDAQ	CHK	Fri, Nov 5, 2004	18.08	18.18	17.81	18.00
2940	NASDAQ	CHK	Thu, Nov 4, 2004	17.73	18.06	17.73	17.99
2939	NASDAQ	CHK	Wed, Nov 3, 2004	17.49	17.90	17.34	17.73
2938	NASDAQ	CHK	Tue, Nov 2, 2004	17.33	17.44	17.07	17.17
2937	NASDAQ	CHK	Mon, Nov 1, 2004	17.01	17.34	16.77	16.92
2936	NASDAQ	CHK	Fri, Oct 29, 2004	16.69	17.04	16.65	17.00
2935	NASDAQ	CHK	Thu, Oct 28, 2004	16.84	17.05	16.49	16.69
2934	NASDAQ	CHK	Wed, Oct 27, 2004	17.47	17.84	16.92	17.04
2933	NASDAQ	CHK	Tue, Oct 26, 2004	16.94	17.62	16.87	17.55
2932	NASDAQ	CHK	Mon, Oct 25, 2004	17.07	17.23	16.86	17.07
2931	NASDAQ	CHK	Fri, Oct 22, 2004	17.31	17.38	16.97	17.01
2930	NASDAQ	CHK	Thu, Oct 21, 2004	17.23	17.33	16.97	17.10
2929	NASDAQ	CHK	Wed, Oct 20, 2004	16.49	17.13	16.44	17.13
2928	NASDAQ	CHK	Tue, Oct 19, 2004	16.26	16.41	16.12	16.39
2927	NASDAQ	CHK	Mon, Oct 18, 2004	16.76	16.82	16.28	16.30
2926	NASDAQ	CHK	Fri, Oct 15, 2004	16.86	16.92	16.66	16.75
2925	NASDAQ	CHK	Thu, Oct 14, 2004	16.68	16.86	16.52	16.76
2924	NASDAQ	CHK	Wed, Oct 13, 2004	17.02	17.02	16.04	16.47
2923	NASDAQ	CHK	Tue, Oct 12, 2004	17.44	17.65	17.11	17.20
2922	NASDAQ	CHK	Mon, Oct 11, 2004	17.82	17.85	17.36	17.44
2921	NASDAQ	CHK	Fri, Oct 8, 2004	17.63	17.80	17.50	17.72
2920	NASDAQ	CHK	Thu, Oct 7, 2004	17.90	18.09	17.44	17.57
2919	NASDAQ	CHK	Wed, Oct 6, 2004	17.55	17.84	17.38	17.84
2918	NASDAQ	CHK	Tue, Oct 5, 2004	17.27	17.44	17.21	17.43
2917	NASDAQ	CHK	Mon, Oct 4, 2004	17.04	17.21	16.96	17.13
2916	NASDAQ	CHK	Fri, Oct 1, 2004	16.73	17.03	16.59	17.00
2915	NASDAQ	CHK	Thu, Sep 30, 2004	16.57	16.79	16.49	16.74
2914	NASDAQ	CHK	Wed, Sep 29, 2004	16.68	16.93	16.39	16.52
2913	NASDAQ	CHK	Tue, Sep 28, 2004	16.67	16.80	16.43	16.63
2912	NASDAQ	CHK	Mon, Sep 27, 2004	16.60	16.75	16.39	16.60
2911	NASDAQ	CHK	Fri, Sep 24, 2004	16.24	16.68	16.23	16.60
2910	NASDAQ	CHK	Thu, Sep 23, 2004	16.33	16.36	16.08	16.20
2909	NASDAQ	CHK	Wed, Sep 22, 2004	16.40	16.49	16.27	16.36
2908	NASDAQ	CHK	Tue, Sep 21, 2004	16.14	16.56	16.07	16.52
2907	NASDAQ	CHK	Mon, Sep 20, 2004	16.10	16.28	16.02	16.07
2906	NASDAQ	CHK	Fri, Sep 17, 2004	15.77	16.02	15.73	15.99
2905	NASDAQ	CHK	Thu, Sep 16, 2004	15.70	15.81	15.66	15.73
2904	NASDAQ	CHK	Wed, Sep 15, 2004	15.88	15.91	15.65	15.70
2903	NASDAQ	CHK	Tue, Sep 14, 2004	16.01	16.11	15.86	15.89
2902	NASDAQ	CHK	Mon, Sep 13, 2004	15.81	16.02	15.81	15.90
2901	NASDAQ	CHK	Fri, Sep 10, 2004	16.05	16.07	15.73	15.73
2900	NASDAQ	CHK	Thu, Sep 9, 2004	15.46	16.00	15.46	15.99
2899	NASDAQ	CHK	Wed, Sep 8, 2004	14.96	15.51	14.96	15.44
2898	NASDAQ	CHK	Tue, Sep 7, 2004	15.31	15.33	14.99	15.23
2897	NASDAQ	CHK	Fri, Sep 3, 2004	15.49	15.49	15.27	15.30
2896	NASDAQ	CHK	Thu, Sep 2, 2004	15.49	15.60	15.22	15.49
2895	NASDAQ	CHK	Wed, Sep 1, 2004	15.01	15.52	14.96	15.35
2894	NASDAQ	CHK	Tue, Aug 31, 2004	14.80	14.98	14.79	14.94
2893	NASDAQ	CHK	Mon, Aug 30, 2004	15.01	15.01	14.74	14.84
2892	NASDAQ	CHK	Fri, Aug 27, 2004	14.91	14.98	14.82	14.94
2891	NASDAQ	CHK	Thu, Aug 26, 2004	14.73	14.85	14.48	14.85
2890	NASDAQ	CHK	Wed, Aug 25, 2004	14.64	14.88	14.47	14.64
2889	NASDAQ	CHK	Tue, Aug 24, 2004	14.78	14.79	14.48	14.59
2888	NASDAQ	CHK	Mon, Aug 23, 2004	15.25	15.26	14.67	14.67
2887	NASDAQ	CHK	Fri, Aug 20, 2004	15.21	15.44	15.15	15.18
2886	NASDAQ	CHK	Thu, Aug 19, 2004	15.00	15.17	14.94	15.12
2885	NASDAQ	CHK	Wed, Aug 18, 2004	14.48	14.94	14.48	14.92
2884	NASDAQ	CHK	Tue, Aug 17, 2004	14.96	14.97	14.49	14.54
2883	NASDAQ	CHK	Mon, Aug 16, 2004	15.33	15.33	14.76	14.92
2882	NASDAQ	CHK	Fri, Aug 13, 2004	14.80	15.29	14.79	15.21
2881	NASDAQ	CHK	Thu, Aug 12, 2004	14.85	15.05	14.62	14.66
2880	NASDAQ	CHK	Wed, Aug 11, 2004	15.17	15.25	14.79	14.96
2879	NASDAQ	CHK	Tue, Aug 10, 2004	15.27	15.28	15.08	15.18
2878	NASDAQ	CHK	Mon, Aug 9, 2004	14.88	15.22	14.85	15.05
2877	NASDAQ	CHK	Fri, Aug 6, 2004	14.88	15.12	14.70	14.73
2876	NASDAQ	CHK	Thu, Aug 5, 2004	15.73	15.91	15.03	15.12
2875	NASDAQ	CHK	Wed, Aug 4, 2004	16.42	16.43	15.70	15.73
2874	NASDAQ	CHK	Tue, Aug 3, 2004	16.16	16.48	16.08	16.41
2873	NASDAQ	CHK	Mon, Aug 2, 2004	16.24	16.39	15.93	16.08
2872	NASDAQ	CHK	Fri, Jul 30, 2004	15.96	16.38	15.91	16.23
2871	NASDAQ	CHK	Thu, Jul 29, 2004	15.81	15.94	15.65	15.87
2870	NASDAQ	CHK	Wed, Jul 28, 2004	15.86	16.00	15.65	15.87
2869	NASDAQ	CHK	Tue, Jul 27, 2004	15.70	15.79	15.32	15.78
2868	NASDAQ	CHK	Mon, Jul 26, 2004	16.23	16.31	15.72	16.03
2867	NASDAQ	CHK	Fri, Jul 23, 2004	16.14	16.16	15.81	16.13
2866	NASDAQ	CHK	Thu, Jul 22, 2004	16.02	16.32	15.99	16.14
2865	NASDAQ	CHK	Wed, Jul 21, 2004	16.70	16.77	16.08	16.10
2864	NASDAQ	CHK	Tue, Jul 20, 2004	16.85	16.90	16.08	16.46
2863	NASDAQ	CHK	Mon, Jul 19, 2004	16.94	17.17	16.83	16.86
2862	NASDAQ	CHK	Fri, Jul 16, 2004	16.61	16.92	16.56	16.90
2861	NASDAQ	CHK	Thu, Jul 15, 2004	16.81	16.81	16.52	16.57
2860	NASDAQ	CHK	Wed, Jul 14, 2004	16.22	16.65	16.18	16.64
2859	NASDAQ	CHK	Tue, Jul 13, 2004	16.27	16.34	16.20	16.22
2858	NASDAQ	CHK	Mon, Jul 12, 2004	16.26	16.32	16.03	16.27
2857	NASDAQ	CHK	Fri, Jul 9, 2004	16.28	16.39	16.18	16.37
2856	NASDAQ	CHK	Thu, Jul 8, 2004	16.33	16.41	16.13	16.28
2855	NASDAQ	CHK	Wed, Jul 7, 2004	16.22	16.38	16.03	16.31
2854	NASDAQ	CHK	Tue, Jul 6, 2004	16.13	16.39	16.09	16.26
2853	NASDAQ	CHK	Fri, Jul 2, 2004	15.95	16.07	15.87	16.03
2852	NASDAQ	CHK	Thu, Jul 1, 2004	15.64	15.95	15.54	15.92
2851	NASDAQ	CHK	Wed, Jun 30, 2004	15.33	15.59	15.32	15.56
2850	NASDAQ	CHK	Tue, Jun 29, 2004	15.33	15.48	15.22	15.37
2849	NASDAQ	CHK	Mon, Jun 28, 2004	15.66	15.68	15.12	15.33
2848	NASDAQ	CHK	Fri, Jun 25, 2004	15.40	15.75	15.37	15.75
2847	NASDAQ	CHK	Thu, Jun 24, 2004	15.70	15.91	15.38	15.49
2846	NASDAQ	CHK	Wed, Jun 23, 2004	15.29	15.71	15.21	15.70
2845	NASDAQ	CHK	Tue, Jun 22, 2004	14.97	15.29	14.96	15.29
2844	NASDAQ	CHK	Mon, Jun 21, 2004	14.93	15.17	14.85	15.05
2843	NASDAQ	CHK	Fri, Jun 18, 2004	15.40	15.46	15.02	15.21
2842	NASDAQ	CHK	Thu, Jun 17, 2004	15.32	15.47	15.28	15.34
2841	NASDAQ	CHK	Wed, Jun 16, 2004	15.01	15.33	14.91	15.22
2840	NASDAQ	CHK	Tue, Jun 15, 2004	14.45	14.80	14.44	14.73
2839	NASDAQ	CHK	Mon, Jun 14, 2004	14.33	14.41	14.14	14.31
2838	NASDAQ	CHK	Thu, Jun 10, 2004	13.87	14.24	13.85	14.24
2837	NASDAQ	CHK	Wed, Jun 9, 2004	14.01	14.01	13.80	13.81
2836	NASDAQ	CHK	Tue, Jun 8, 2004	14.20	14.21	13.98	14.03
2835	NASDAQ	CHK	Mon, Jun 7, 2004	13.99	14.15	13.85	14.14
2834	NASDAQ	CHK	Fri, Jun 4, 2004	14.06	14.06	13.78	13.88
2833	NASDAQ	CHK	Thu, Jun 3, 2004	14.17	14.29	13.90	13.96
2832	NASDAQ	CHK	Wed, Jun 2, 2004	14.41	14.43	14.14	14.14
2831	NASDAQ	CHK	Tue, Jun 1, 2004	13.96	14.35	13.96	14.30
2830	NASDAQ	CHK	Fri, May 28, 2004	14.02	14.14	13.87	13.96
2829	NASDAQ	CHK	Thu, May 27, 2004	14.37	14.46	13.98	14.02
2828	NASDAQ	CHK	Wed, May 26, 2004	14.64	14.71	14.31	14.31
2827	NASDAQ	CHK	Tue, May 25, 2004	14.36	14.67	14.30	14.64
2826	NASDAQ	CHK	Mon, May 24, 2004	14.11	14.38	14.11	14.27
2825	NASDAQ	CHK	Fri, May 21, 2004	14.16	14.22	14.00	14.03
2824	NASDAQ	CHK	Thu, May 20, 2004	13.96	14.17	13.94	14.11
2823	NASDAQ	CHK	Wed, May 19, 2004	14.17	14.29	13.87	13.96
2822	NASDAQ	CHK	Tue, May 18, 2004	14.36	14.39	14.01	14.11
2821	NASDAQ	CHK	Mon, May 17, 2004	14.22	14.47	14.11	14.36
2820	NASDAQ	CHK	Fri, May 14, 2004	13.96	14.38	13.94	14.29
2819	NASDAQ	CHK	Thu, May 13, 2004	14.05	14.09	13.86	13.94
2818	NASDAQ	CHK	Wed, May 12, 2004	14.03	14.36	13.86	14.05
2817	NASDAQ	CHK	Tue, May 11, 2004	13.63	14.19	13.62	13.92
2816	NASDAQ	CHK	Mon, May 10, 2004	14.27	14.27	13.41	13.63
2815	NASDAQ	CHK	Fri, May 7, 2004	14.58	14.63	14.16	14.37
2814	NASDAQ	CHK	Thu, May 6, 2004	14.80	14.80	14.48	14.59
2813	NASDAQ	CHK	Wed, May 5, 2004	14.81	14.92	14.48	14.79
2812	NASDAQ	CHK	Tue, May 4, 2004	14.91	15.12	14.75	14.86
2811	NASDAQ	CHK	Mon, May 3, 2004	14.64	14.93	14.56	14.86
2810	NASDAQ	CHK	Fri, Apr 30, 2004	14.58	14.76	14.49	14.54
2809	NASDAQ	CHK	Thu, Apr 29, 2004	15.01	15.01	14.22	14.56
2808	NASDAQ	CHK	Wed, Apr 28, 2004	15.22	15.26	14.89	15.01
2807	NASDAQ	CHK	Tue, Apr 27, 2004	14.70	15.17	14.70	15.16
2806	NASDAQ	CHK	Mon, Apr 26, 2004	14.90	15.03	14.60	14.70
2805	NASDAQ	CHK	Fri, Apr 23, 2004	14.91	14.93	14.75	14.90
2804	NASDAQ	CHK	Thu, Apr 22, 2004	14.66	14.95	14.60	14.95
2803	NASDAQ	CHK	Wed, Apr 21, 2004	14.65	14.70	14.27	14.64
2802	NASDAQ	CHK	Tue, Apr 20, 2004	14.96	14.99	14.64	14.70
2801	NASDAQ	CHK	Mon, Apr 19, 2004	14.94	15.07	14.59	14.91
2800	NASDAQ	CHK	Fri, Apr 16, 2004	14.54	14.96	14.52	14.80
2799	NASDAQ	CHK	Thu, Apr 15, 2004	14.31	14.58	14.30	14.53
2798	NASDAQ	CHK	Wed, Apr 14, 2004	14.38	14.40	14.01	14.09
2797	NASDAQ	CHK	Tue, Apr 13, 2004	14.80	14.85	14.34	14.42
2796	NASDAQ	CHK	Mon, Apr 12, 2004	14.62	14.90	14.47	14.75
2795	NASDAQ	CHK	Thu, Apr 8, 2004	14.37	14.54	14.36	14.52
2794	NASDAQ	CHK	Wed, Apr 7, 2004	14.17	14.27	14.04	14.24
2793	NASDAQ	CHK	Tue, Apr 6, 2004	14.23	14.25	14.10	14.17
2792	NASDAQ	CHK	Mon, Apr 5, 2004	14.19	14.38	14.10	14.23
2791	NASDAQ	CHK	Fri, Apr 2, 2004	14.11	14.22	14.02	14.19
2790	NASDAQ	CHK	Thu, Apr 1, 2004	14.17	14.22	14.03	14.11
2789	NASDAQ	CHK	Wed, Mar 31, 2004	13.87	14.20	13.86	14.17
2788	NASDAQ	CHK	Tue, Mar 30, 2004	13.47	13.80	13.47	13.77
2787	NASDAQ	CHK	Mon, Mar 29, 2004	13.44	13.55	13.39	13.41
2786	NASDAQ	CHK	Fri, Mar 26, 2004	13.15	13.38	13.09	13.37
2785	NASDAQ	CHK	Thu, Mar 25, 2004	13.00	13.20	12.99	13.15
2784	NASDAQ	CHK	Wed, Mar 24, 2004	13.04	13.07	12.74	12.80
2783	NASDAQ	CHK	Tue, Mar 23, 2004	13.46	13.49	13.13	13.25
2782	NASDAQ	CHK	Mon, Mar 22, 2004	13.54	13.61	13.35	13.43
2781	NASDAQ	CHK	Fri, Mar 19, 2004	13.88	13.90	13.57	13.60
2780	NASDAQ	CHK	Thu, Mar 18, 2004	13.87	13.96	13.73	13.86
2779	NASDAQ	CHK	Wed, Mar 17, 2004	13.45	13.90	13.44	13.89
2778	NASDAQ	CHK	Tue, Mar 16, 2004	13.70	13.74	13.35	13.46
2777	NASDAQ	CHK	Mon, Mar 15, 2004	13.73	13.91	13.62	13.64
2776	NASDAQ	CHK	Fri, Mar 12, 2004	13.41	13.69	13.39	13.69
2775	NASDAQ	CHK	Thu, Mar 11, 2004	13.33	13.53	13.28	13.37
2774	NASDAQ	CHK	Wed, Mar 10, 2004	13.88	13.89	13.41	13.42
2773	NASDAQ	CHK	Tue, Mar 9, 2004	13.96	14.00	13.78	13.90
2772	NASDAQ	CHK	Mon, Mar 8, 2004	14.15	14.25	13.70	13.74
2771	NASDAQ	CHK	Fri, Mar 5, 2004	13.98	14.27	13.98	14.25
2770	NASDAQ	CHK	Thu, Mar 4, 2004	14.04	14.07	13.78	14.01
2769	NASDAQ	CHK	Wed, Mar 3, 2004	14.21	14.22	13.85	14.06
2768	NASDAQ	CHK	Tue, Mar 2, 2004	14.21	14.35	14.06	14.15
2767	NASDAQ	CHK	Mon, Mar 1, 2004	13.59	13.92	13.54	13.89
2766	NASDAQ	CHK	Fri, Feb 27, 2004	13.47	13.55	13.33	13.55
2765	NASDAQ	CHK	Thu, Feb 26, 2004	12.99	13.43	12.96	13.27
2764	NASDAQ	CHK	Wed, Feb 25, 2004	12.95	13.06	12.90	12.95
2763	NASDAQ	CHK	Tue, Feb 24, 2004	13.20	13.20	12.74	12.92
2762	NASDAQ	CHK	Mon, Feb 23, 2004	13.22	13.26	13.00	13.26
2761	NASDAQ	CHK	Fri, Feb 20, 2004	13.13	13.18	12.86	13.18
2760	NASDAQ	CHK	Thu, Feb 19, 2004	13.27	13.36	13.11	13.19
2759	NASDAQ	CHK	Wed, Feb 18, 2004	13.60	13.65	13.35	13.38
2758	NASDAQ	CHK	Tue, Feb 17, 2004	13.72	13.79	13.38	13.66
2757	NASDAQ	CHK	Fri, Feb 13, 2004	13.68	13.70	13.34	13.64
2756	NASDAQ	CHK	Thu, Feb 12, 2004	13.54	13.85	13.44	13.73
2755	NASDAQ	CHK	Wed, Feb 11, 2004	13.42	13.56	13.15	13.54
2754	NASDAQ	CHK	Tue, Feb 10, 2004	13.06	13.37	12.97	13.32
2753	NASDAQ	CHK	Mon, Feb 9, 2004	12.93	13.26	12.91	13.05
2752	NASDAQ	CHK	Fri, Feb 6, 2004	12.42	12.94	12.42	12.86
2751	NASDAQ	CHK	Thu, Feb 5, 2004	13.04	13.04	12.37	12.58
2750	NASDAQ	CHK	Wed, Feb 4, 2004	13.07	13.09	12.87	13.04
2749	NASDAQ	CHK	Tue, Feb 3, 2004	12.69	13.14	12.69	13.09
2748	NASDAQ	CHK	Mon, Feb 2, 2004	13.13	13.30	12.86	13.06
2747	NASDAQ	CHK	Fri, Jan 30, 2004	13.18	13.22	12.77	13.17
2746	NASDAQ	CHK	Thu, Jan 29, 2004	13.59	13.68	12.83	13.24
2745	NASDAQ	CHK	Wed, Jan 28, 2004	13.92	13.92	13.38	13.53
2744	NASDAQ	CHK	Tue, Jan 27, 2004	14.03	14.16	13.69	13.92
2743	NASDAQ	CHK	Mon, Jan 26, 2004	14.11	14.31	13.83	14.01
2742	NASDAQ	CHK	Fri, Jan 23, 2004	14.09	14.38	14.09	14.38
2741	NASDAQ	CHK	Thu, Jan 22, 2004	14.40	14.46	13.90	14.06
2740	NASDAQ	CHK	Wed, Jan 21, 2004	14.48	14.49	14.25	14.29
2739	NASDAQ	CHK	Tue, Jan 20, 2004	14.02	14.47	14.01	14.42
2738	NASDAQ	CHK	Fri, Jan 16, 2004	13.64	13.78	13.61	13.72
2737	NASDAQ	CHK	Thu, Jan 15, 2004	14.21	14.27	13.48	13.56
2736	NASDAQ	CHK	Wed, Jan 14, 2004	14.29	14.30	14.05	14.18
2735	NASDAQ	CHK	Tue, Jan 13, 2004	14.37	14.43	14.17	14.26
2734	NASDAQ	CHK	Mon, Jan 12, 2004	14.29	14.39	14.12	14.27
2733	NASDAQ	CHK	Fri, Jan 9, 2004	14.29	14.49	13.96	14.29
2732	NASDAQ	CHK	Thu, Jan 8, 2004	13.85	14.33	13.83	14.28
2731	NASDAQ	CHK	Wed, Jan 7, 2004	14.57	14.57	14.24	14.35
2730	NASDAQ	CHK	Tue, Jan 6, 2004	14.63	14.78	14.46	14.52
2729	NASDAQ	CHK	Mon, Jan 5, 2004	14.20	14.67	14.19	14.53
2728	NASDAQ	CHK	Fri, Jan 2, 2004	14.27	14.33	14.01	14.14
2727	NASDAQ	CHK	Wed, Dec 31, 2003	14.46	14.53	14.17	14.36
2726	NASDAQ	CHK	Tue, Dec 30, 2003	14.79	14.79	14.38	14.46
2725	NASDAQ	CHK	Mon, Dec 29, 2003	14.48	14.80	14.37	14.75
2724	NASDAQ	CHK	Fri, Dec 26, 2003	14.07	14.36	14.06	14.34
2723	NASDAQ	CHK	Wed, Dec 24, 2003	13.74	14.05	13.74	14.00
2722	NASDAQ	CHK	Tue, Dec 23, 2003	14.01	14.12	13.62	13.78
2721	NASDAQ	CHK	Mon, Dec 22, 2003	13.85	13.93	13.50	13.75
2720	NASDAQ	CHK	Fri, Dec 19, 2003	14.01	14.01	13.75	13.85
2719	NASDAQ	CHK	Thu, Dec 18, 2003	13.74	14.01	13.70	14.01
2718	NASDAQ	CHK	Wed, Dec 17, 2003	13.64	13.85	13.59	13.75
2717	NASDAQ	CHK	Tue, Dec 16, 2003	13.53	13.68	13.39	13.66
2716	NASDAQ	CHK	Mon, Dec 15, 2003	13.94	13.96	13.51	13.53
2715	NASDAQ	CHK	Fri, Dec 12, 2003	13.62	14.00	13.60	13.90
2714	NASDAQ	CHK	Thu, Dec 11, 2003	13.62	13.67	13.48	13.54
2713	NASDAQ	CHK	Wed, Dec 10, 2003	13.72	13.79	13.50	13.61
2712	NASDAQ	CHK	Tue, Dec 9, 2003	13.73	13.84	13.59	13.62
2711	NASDAQ	CHK	Mon, Dec 8, 2003	13.64	13.78	13.44	13.72
2710	NASDAQ	CHK	Fri, Dec 5, 2003	13.73	13.82	13.35	13.54
2709	NASDAQ	CHK	Thu, Dec 4, 2003	13.11	13.79	13.10	13.72
2708	NASDAQ	CHK	Wed, Dec 3, 2003	13.50	13.52	13.08	13.09
2707	NASDAQ	CHK	Tue, Dec 2, 2003	13.37	13.60	13.36	13.52
2706	NASDAQ	CHK	Mon, Dec 1, 2003	12.98	13.38	12.87	13.37
2705	NASDAQ	CHK	Fri, Nov 28, 2003	12.95	13.02	12.87	12.90
2704	NASDAQ	CHK	Wed, Nov 26, 2003	12.79	12.97	12.79	12.95
2703	NASDAQ	CHK	Tue, Nov 25, 2003	12.56	12.81	12.45	12.74
2702	NASDAQ	CHK	Mon, Nov 24, 2003	12.58	12.63	12.36	12.58
2701	NASDAQ	CHK	Fri, Nov 21, 2003	12.95	13.00	12.58	12.58
2700	NASDAQ	CHK	Thu, Nov 20, 2003	12.98	13.06	12.82	12.85
2699	NASDAQ	CHK	Wed, Nov 19, 2003	13.14	13.26	13.00	13.06
2698	NASDAQ	CHK	Tue, Nov 18, 2003	13.10	13.27	13.00	13.17
2697	NASDAQ	CHK	Mon, Nov 17, 2003	13.25	13.25	12.95	13.10
2696	NASDAQ	CHK	Fri, Nov 14, 2003	12.98	13.41	12.91	13.27
2695	NASDAQ	CHK	Thu, Nov 13, 2003	12.67	13.00	12.53	12.97
2694	NASDAQ	CHK	Wed, Nov 12, 2003	12.48	12.68	12.38	12.61
2693	NASDAQ	CHK	Tue, Nov 11, 2003	13.10	13.12	12.80	12.85
2692	NASDAQ	CHK	Mon, Nov 10, 2003	13.14	13.16	12.87	13.00
2691	NASDAQ	CHK	Fri, Nov 7, 2003	12.93	13.00	12.75	12.93
2690	NASDAQ	CHK	Thu, Nov 6, 2003	12.74	12.94	12.67	12.83
2689	NASDAQ	CHK	Wed, Nov 5, 2003	12.55	12.69	12.44	12.64
2688	NASDAQ	CHK	Tue, Nov 4, 2003	12.46	12.54	12.31	12.51
2687	NASDAQ	CHK	Mon, Nov 3, 2003	12.63	12.70	12.45	12.45
2686	NASDAQ	CHK	Fri, Oct 31, 2003	12.68	12.68	12.02	12.61
2685	NASDAQ	CHK	Thu, Oct 30, 2003	12.74	12.76	12.11	12.22
2684	NASDAQ	CHK	Wed, Oct 29, 2003	11.95	12.48	11.93	12.46
2683	NASDAQ	CHK	Tue, Oct 28, 2003	11.88	11.95	11.76	11.95
2682	NASDAQ	CHK	Mon, Oct 27, 2003	11.89	11.95	11.74	11.87
2681	NASDAQ	CHK	Fri, Oct 24, 2003	11.89	11.89	11.65	11.72
2680	NASDAQ	CHK	Thu, Oct 23, 2003	11.93	11.93	11.70	11.79
2679	NASDAQ	CHK	Wed, Oct 22, 2003	12.07	12.07	11.89	12.00
2678	NASDAQ	CHK	Tue, Oct 21, 2003	11.71	11.98	11.69	11.98
2677	NASDAQ	CHK	Mon, Oct 20, 2003	11.88	11.88	11.57	11.61
2676	NASDAQ	CHK	Fri, Oct 17, 2003	11.89	11.90	11.69	11.86
2675	NASDAQ	CHK	Thu, Oct 16, 2003	11.66	11.95	11.65	11.93
2674	NASDAQ	CHK	Wed, Oct 15, 2003	12.02	12.05	11.69	11.77
2673	NASDAQ	CHK	Tue, Oct 14, 2003	12.15	12.15	11.82	12.03
2672	NASDAQ	CHK	Mon, Oct 13, 2003	12.28	12.28	12.13	12.17
2671	NASDAQ	CHK	Fri, Oct 10, 2003	12.04	12.23	11.99	12.20
2670	NASDAQ	CHK	Thu, Oct 9, 2003	12.02	12.08	11.84	11.97
2669	NASDAQ	CHK	Wed, Oct 8, 2003	12.05	12.25	11.93	11.95
2668	NASDAQ	CHK	Tue, Oct 7, 2003	11.59	11.99	11.49	11.93
2667	NASDAQ	CHK	Mon, Oct 6, 2003	11.56	11.63	11.52	11.58
2666	NASDAQ	CHK	Fri, Oct 3, 2003	11.63	11.70	11.45	11.61
2665	NASDAQ	CHK	Thu, Oct 2, 2003	11.62	11.62	11.44	11.61
2664	NASDAQ	CHK	Wed, Oct 1, 2003	11.45	11.62	11.27	11.60
2663	NASDAQ	CHK	Tue, Sep 30, 2003	11.13	11.49	11.10	11.40
2662	NASDAQ	CHK	Mon, Sep 29, 2003	10.87	11.15	10.84	11.11
2661	NASDAQ	CHK	Fri, Sep 26, 2003	11.14	11.15	10.73	10.74
2660	NASDAQ	CHK	Thu, Sep 25, 2003	11.46	11.50	11.08	11.11
2659	NASDAQ	CHK	Wed, Sep 24, 2003	11.22	11.46	11.22	11.40
2658	NASDAQ	CHK	Tue, Sep 23, 2003	11.21	11.29	11.10	11.12
2657	NASDAQ	CHK	Mon, Sep 22, 2003	10.75	11.15	10.74	10.97
2656	NASDAQ	CHK	Fri, Sep 19, 2003	10.57	10.82	10.53	10.75
2655	NASDAQ	CHK	Thu, Sep 18, 2003	10.71	10.80	10.56	10.58
2654	NASDAQ	CHK	Wed, Sep 17, 2003	10.89	10.90	10.69	10.71
2653	NASDAQ	CHK	Tue, Sep 16, 2003	10.84	10.98	10.83	10.93
2652	NASDAQ	CHK	Mon, Sep 15, 2003	10.73	10.83	10.72	10.78
2651	NASDAQ	CHK	Fri, Sep 12, 2003	10.74	10.85	10.66	10.75
2650	NASDAQ	CHK	Thu, Sep 11, 2003	10.89	10.97	10.68	10.80
2649	NASDAQ	CHK	Wed, Sep 10, 2003	11.06	11.09	10.82	10.89
2648	NASDAQ	CHK	Tue, Sep 9, 2003	11.31	11.33	11.06	11.07
2647	NASDAQ	CHK	Mon, Sep 8, 2003	11.29	11.37	11.27	11.37
2646	NASDAQ	CHK	Fri, Sep 5, 2003	11.31	11.41	11.28	11.35
2645	NASDAQ	CHK	Thu, Sep 4, 2003	11.40	11.40	11.21	11.38
2644	NASDAQ	CHK	Wed, Sep 3, 2003	11.28	11.35	11.20	11.29
2643	NASDAQ	CHK	Tue, Sep 2, 2003	11.44	11.45	11.19	11.23
2642	NASDAQ	CHK	Fri, Aug 29, 2003	11.53	11.60	11.40	11.46
2641	NASDAQ	CHK	Thu, Aug 28, 2003	11.10	11.58	11.05	11.50
2640	NASDAQ	CHK	Wed, Aug 27, 2003	11.11	11.35	11.09	11.09
2639	NASDAQ	CHK	Tue, Aug 26, 2003	11.06	11.14	10.95	11.14
2638	NASDAQ	CHK	Mon, Aug 25, 2003	11.31	11.32	11.11	11.15
2637	NASDAQ	CHK	Fri, Aug 22, 2003	11.52	11.57	11.29	11.31
2636	NASDAQ	CHK	Thu, Aug 21, 2003	11.21	11.52	11.17	11.45
2635	NASDAQ	CHK	Wed, Aug 20, 2003	11.12	11.26	11.03	11.16
2634	NASDAQ	CHK	Tue, Aug 19, 2003	11.31	11.37	11.05	11.17
2633	NASDAQ	CHK	Mon, Aug 18, 2003	11.35	11.45	11.26	11.39
2632	NASDAQ	CHK	Fri, Aug 15, 2003	11.15	11.24	11.00	11.23
2631	NASDAQ	CHK	Thu, Aug 14, 2003	11.28	11.31	10.83	11.05
2630	NASDAQ	CHK	Wed, Aug 13, 2003	11.34	11.57	11.22	11.38
2629	NASDAQ	CHK	Tue, Aug 12, 2003	11.15	11.31	11.15	11.24
2628	NASDAQ	CHK	Mon, Aug 11, 2003	11.10	11.21	11.05	11.09
2627	NASDAQ	CHK	Fri, Aug 8, 2003	11.03	11.19	10.89	10.89
2626	NASDAQ	CHK	Thu, Aug 7, 2003	10.57	11.02	10.51	10.92
2625	NASDAQ	CHK	Wed, Aug 6, 2003	9.99	10.54	9.99	10.50
2624	NASDAQ	CHK	Tue, Aug 5, 2003	9.99	10.20	9.95	10.01
2623	NASDAQ	CHK	Mon, Aug 4, 2003	10.02	10.05	9.89	9.92
2622	NASDAQ	CHK	Fri, Aug 1, 2003	10.26	10.26	9.99	10.03
2621	NASDAQ	CHK	Thu, Jul 31, 2003	10.06	10.30	9.99	10.12
2620	NASDAQ	CHK	Wed, Jul 30, 2003	10.23	10.24	9.94	9.99
2619	NASDAQ	CHK	Tue, Jul 29, 2003	10.18	10.48	10.00	10.23
2618	NASDAQ	CHK	Mon, Jul 28, 2003	10.15	10.15	9.89	10.05
2617	NASDAQ	CHK	Fri, Jul 25, 2003	9.78	10.09	9.73	10.09
2616	NASDAQ	CHK	Thu, Jul 24, 2003	9.92	10.06	9.69	9.76
2615	NASDAQ	CHK	Wed, Jul 23, 2003	10.18	10.24	9.84	9.89
2614	NASDAQ	CHK	Tue, Jul 22, 2003	10.18	10.27	9.97	10.20
2613	NASDAQ	CHK	Mon, Jul 21, 2003	10.28	10.36	10.04	10.15
2612	NASDAQ	CHK	Fri, Jul 18, 2003	10.10	10.27	10.08	10.21
2611	NASDAQ	CHK	Thu, Jul 17, 2003	9.89	10.15	9.76	10.05
2610	NASDAQ	CHK	Wed, Jul 16, 2003	9.93	10.05	9.81	9.92
2609	NASDAQ	CHK	Tue, Jul 15, 2003	10.29	10.33	9.89	9.89
2608	NASDAQ	CHK	Mon, Jul 14, 2003	10.23	10.34	10.05	10.29
2607	NASDAQ	CHK	Fri, Jul 11, 2003	10.10	10.24	9.95	10.12
2606	NASDAQ	CHK	Thu, Jul 10, 2003	10.41	10.41	9.89	10.04
2605	NASDAQ	CHK	Wed, Jul 9, 2003	10.10	10.51	10.10	10.41
2604	NASDAQ	CHK	Tue, Jul 8, 2003	10.11	10.15	9.87	10.04
2603	NASDAQ	CHK	Mon, Jul 7, 2003	10.36	10.42	10.06	10.21
2602	NASDAQ	CHK	Thu, Jul 3, 2003	10.49	10.67	10.29	10.56
2601	NASDAQ	CHK	Wed, Jul 2, 2003	10.63	10.68	10.43	10.49
2600	NASDAQ	CHK	Tue, Jul 1, 2003	10.63	10.68	10.43	10.58
2599	NASDAQ	CHK	Mon, Jun 30, 2003	10.88	10.94	10.56	10.68
2598	NASDAQ	CHK	Fri, Jun 27, 2003	11.10	11.10	10.84	10.88
2597	NASDAQ	CHK	Thu, Jun 26, 2003	11.33	11.47	10.92	11.06
2596	NASDAQ	CHK	Wed, Jun 25, 2003	10.74	11.40	10.73	11.24
2595	NASDAQ	CHK	Tue, Jun 24, 2003	10.63	10.84	10.63	10.66
2594	NASDAQ	CHK	Mon, Jun 23, 2003	10.72	10.78	10.47	10.58
2593	NASDAQ	CHK	Fri, Jun 20, 2003	10.78	10.94	10.58	10.61
2592	NASDAQ	CHK	Thu, Jun 19, 2003	10.70	11.00	10.59	10.83
2591	NASDAQ	CHK	Wed, Jun 18, 2003	10.63	10.80	10.47	10.76
2590	NASDAQ	CHK	Tue, Jun 17, 2003	11.00	11.00	10.57	10.66
2589	NASDAQ	CHK	Mon, Jun 16, 2003	11.20	11.21	10.87	10.97
2588	NASDAQ	CHK	Fri, Jun 13, 2003	11.74	11.74	11.07	11.09
2587	NASDAQ	CHK	Thu, Jun 12, 2003	12.05	12.11	11.25	11.43
2586	NASDAQ	CHK	Wed, Jun 11, 2003	11.33	11.90	11.27	11.84
2585	NASDAQ	CHK	Tue, Jun 10, 2003	11.15	11.34	11.06	11.20
2584	NASDAQ	CHK	Mon, Jun 9, 2003	11.47	11.50	11.05	11.12
2583	NASDAQ	CHK	Fri, Jun 6, 2003	11.52	11.59	11.16	11.32
2582	NASDAQ	CHK	Thu, Jun 5, 2003	11.33	11.44	11.13	11.31
2581	NASDAQ	CHK	Wed, Jun 4, 2003	11.14	11.62	11.14	11.39
2580	NASDAQ	CHK	Tue, Jun 3, 2003	11.33	11.37	11.06	11.07
2579	NASDAQ	CHK	Mon, Jun 2, 2003	11.05	11.31	11.01	11.11
2578	NASDAQ	CHK	Fri, May 30, 2003	10.50	10.98	10.50	10.79
2577	NASDAQ	CHK	Thu, May 29, 2003	10.41	10.55	10.39	10.47
2576	NASDAQ	CHK	Wed, May 28, 2003	11.05	11.06	10.61	10.61
2575	NASDAQ	CHK	Tue, May 27, 2003	10.96	11.04	10.83	10.90
2574	NASDAQ	CHK	Fri, May 23, 2003	11.08	11.15	10.86	10.96
2573	NASDAQ	CHK	Thu, May 22, 2003	10.93	11.15	10.76	11.00
2572	NASDAQ	CHK	Wed, May 21, 2003	10.35	10.85	10.30	10.74
2571	NASDAQ	CHK	Tue, May 20, 2003	10.47	10.50	10.21	10.35
2570	NASDAQ	CHK	Mon, May 19, 2003	10.30	10.50	10.30	10.41
2569	NASDAQ	CHK	Fri, May 16, 2003	10.20	10.52	10.15	10.30
2568	NASDAQ	CHK	Thu, May 15, 2003	10.52	10.54	10.36	10.47
2567	NASDAQ	CHK	Wed, May 14, 2003	10.01	10.26	9.91	10.26
2566	NASDAQ	CHK	Tue, May 13, 2003	9.67	9.94	7.77	9.93
2565	NASDAQ	CHK	Mon, May 12, 2003	9.50	9.79	9.49	9.60
2564	NASDAQ	CHK	Fri, May 9, 2003	9.29	9.51	9.25	9.51
2563	NASDAQ	CHK	Thu, May 8, 2003	9.29	9.30	9.21	9.21
2562	NASDAQ	CHK	Wed, May 7, 2003	9.20	9.32	9.13	9.26
2561	NASDAQ	CHK	Tue, May 6, 2003	9.12	9.25	9.08	9.18
2560	NASDAQ	CHK	Mon, May 5, 2003	8.97	9.21	8.95	9.00
2559	NASDAQ	CHK	Fri, May 2, 2003	8.72	8.86	8.66	8.83
2558	NASDAQ	CHK	Thu, May 1, 2003	8.56	8.81	8.51	8.67
2557	NASDAQ	CHK	Wed, Apr 30, 2003	8.48	8.64	8.42	8.52
2556	NASDAQ	CHK	Tue, Apr 29, 2003	8.62	8.66	8.34	8.45
2555	NASDAQ	CHK	Mon, Apr 28, 2003	8.40	8.43	8.23	8.35
2554	NASDAQ	CHK	Fri, Apr 25, 2003	8.43	8.46	8.26	8.34
2553	NASDAQ	CHK	Thu, Apr 24, 2003	8.38	8.53	8.29	8.43
2552	NASDAQ	CHK	Wed, Apr 23, 2003	8.53	8.65	8.38	8.38
2551	NASDAQ	CHK	Tue, Apr 22, 2003	8.47	8.51	8.39	8.50
2550	NASDAQ	CHK	Mon, Apr 21, 2003	8.45	8.51	8.37	8.49
2549	NASDAQ	CHK	Thu, Apr 17, 2003	8.26	8.46	8.16	8.44
2548	NASDAQ	CHK	Wed, Apr 16, 2003	8.31	8.34	8.16	8.19
2547	NASDAQ	CHK	Tue, Apr 15, 2003	8.26	8.29	8.12	8.26
2546	NASDAQ	CHK	Mon, Apr 14, 2003	8.18	8.30	8.18	8.24
2545	NASDAQ	CHK	Fri, Apr 11, 2003	8.34	8.34	8.19	8.26
2544	NASDAQ	CHK	Thu, Apr 10, 2003	8.03	8.35	8.03	8.32
2543	NASDAQ	CHK	Wed, Apr 9, 2003	7.98	8.00	7.88	7.96
2542	NASDAQ	CHK	Tue, Apr 8, 2003	8.02	8.08	7.90	7.98
2541	NASDAQ	CHK	Mon, Apr 7, 2003	8.06	8.28	7.97	8.10
2540	NASDAQ	CHK	Fri, Apr 4, 2003	8.19	8.26	8.07	8.16
2539	NASDAQ	CHK	Thu, Apr 3, 2003	8.35	8.45	8.16	8.17
2538	NASDAQ	CHK	Wed, Apr 2, 2003	8.51	8.51	8.24	8.39
2537	NASDAQ	CHK	Tue, Apr 1, 2003	8.30	8.51	8.28	8.51
2536	NASDAQ	CHK	Mon, Mar 31, 2003	8.25	8.31	8.17	8.31
2535	NASDAQ	CHK	Fri, Mar 28, 2003	8.18	8.33	8.14	8.33
2534	NASDAQ	CHK	Thu, Mar 27, 2003	8.10	8.24	7.98	8.18
2533	NASDAQ	CHK	Wed, Mar 26, 2003	8.02	8.12	7.99	8.05
2532	NASDAQ	CHK	Tue, Mar 25, 2003	7.98	8.14	7.98	8.01
2531	NASDAQ	CHK	Mon, Mar 24, 2003	8.07	8.14	7.87	8.00
2530	NASDAQ	CHK	Fri, Mar 21, 2003	8.25	8.26	8.03	8.13
2529	NASDAQ	CHK	Thu, Mar 20, 2003	7.83	8.25	7.78	8.24
2528	NASDAQ	CHK	Wed, Mar 19, 2003	7.98	8.01	7.78	7.93
2527	NASDAQ	CHK	Tue, Mar 18, 2003	7.90	7.98	7.69	7.96
2526	NASDAQ	CHK	Mon, Mar 17, 2003	7.75	8.01	7.75	7.90
2525	NASDAQ	CHK	Fri, Mar 14, 2003	8.00	8.03	7.72	7.82
2524	NASDAQ	CHK	Thu, Mar 13, 2003	8.14	8.19	7.87	8.01
2523	NASDAQ	CHK	Wed, Mar 12, 2003	8.40	8.42	7.93	8.11
2522	NASDAQ	CHK	Tue, Mar 11, 2003	8.63	8.70	8.36	8.46
2521	NASDAQ	CHK	Mon, Mar 10, 2003	8.76	8.79	8.62	8.67
2520	NASDAQ	CHK	Fri, Mar 7, 2003	8.76	8.82	8.65	8.75
2519	NASDAQ	CHK	Thu, Mar 6, 2003	8.81	8.99	8.72	8.77
2518	NASDAQ	CHK	Wed, Mar 5, 2003	8.71	8.83	8.68	8.81
2517	NASDAQ	CHK	Tue, Mar 4, 2003	8.62	8.74	8.57	8.73
2516	NASDAQ	CHK	Mon, Mar 3, 2003	8.57	8.64	8.56	8.62
2515	NASDAQ	CHK	Fri, Feb 28, 2003	8.65	8.70	8.58	8.58
2514	NASDAQ	CHK	Thu, Feb 27, 2003	8.69	8.81	8.57	8.67
2513	NASDAQ	CHK	Wed, Feb 26, 2003	8.51	8.66	8.33	8.62
2512	NASDAQ	CHK	Tue, Feb 25, 2003	8.99	8.99	8.48	8.55
2511	NASDAQ	CHK	Mon, Feb 24, 2003	8.77	9.13	8.77	8.99
2510	NASDAQ	CHK	Fri, Feb 21, 2003	8.53	8.87	8.53	8.71
2509	NASDAQ	CHK	Thu, Feb 20, 2003	8.56	8.61	8.50	8.55
2508	NASDAQ	CHK	Wed, Feb 19, 2003	8.52	8.67	8.47	8.56
2507	NASDAQ	CHK	Tue, Feb 18, 2003	8.39	8.64	8.36	8.62
2506	NASDAQ	CHK	Fri, Feb 14, 2003	8.30	8.43	8.24	8.37
2505	NASDAQ	CHK	Thu, Feb 13, 2003	8.37	8.44	8.25	8.40
2504	NASDAQ	CHK	Wed, Feb 12, 2003	8.66	8.67	8.25	8.36
2503	NASDAQ	CHK	Tue, Feb 11, 2003	8.72	8.76	8.56	8.66
2502	NASDAQ	CHK	Mon, Feb 10, 2003	8.50	8.72	8.50	8.72
2501	NASDAQ	CHK	Fri, Feb 7, 2003	8.56	8.64	8.48	8.48
2500	NASDAQ	CHK	Thu, Feb 6, 2003	8.42	8.61	8.42	8.48
2499	NASDAQ	CHK	Wed, Feb 5, 2003	8.50	8.66	8.42	8.42
2498	NASDAQ	CHK	Tue, Feb 4, 2003	8.51	8.58	8.46	8.50
2497	NASDAQ	CHK	Mon, Feb 3, 2003	8.56	8.71	8.46	8.56
2496	NASDAQ	CHK	Fri, Jan 31, 2003	8.52	8.60	8.38	8.56
2495	NASDAQ	CHK	Thu, Jan 30, 2003	8.62	8.72	8.52	8.52
2494	NASDAQ	CHK	Wed, Jan 29, 2003	8.40	8.63	8.29	8.61
2493	NASDAQ	CHK	Tue, Jan 28, 2003	8.14	8.44	8.14	8.40
2492	NASDAQ	CHK	Mon, Jan 27, 2003	8.46	8.51	8.09	8.09
2491	NASDAQ	CHK	Fri, Jan 24, 2003	8.80	8.82	8.46	8.55
2490	NASDAQ	CHK	Thu, Jan 23, 2003	8.81	8.95	8.67	8.80
2489	NASDAQ	CHK	Wed, Jan 22, 2003	8.69	8.87	8.62	8.79
2488	NASDAQ	CHK	Tue, Jan 21, 2003	8.88	8.90	8.66	8.72
2487	NASDAQ	CHK	Fri, Jan 17, 2003	8.88	8.93	8.67	8.81
2486	NASDAQ	CHK	Thu, Jan 16, 2003	8.67	8.88	8.66	8.88
2485	NASDAQ	CHK	Wed, Jan 15, 2003	8.58	8.67	8.47	8.64
2484	NASDAQ	CHK	Tue, Jan 14, 2003	8.49	8.67	8.47	8.55
2483	NASDAQ	CHK	Mon, Jan 13, 2003	8.54	8.66	8.38	8.53
2482	NASDAQ	CHK	Fri, Jan 10, 2003	8.56	8.62	8.30	8.44
2481	NASDAQ	CHK	Thu, Jan 9, 2003	8.25	8.56	8.19	8.56
2480	NASDAQ	CHK	Wed, Jan 8, 2003	8.29	8.35	8.18	8.25
2479	NASDAQ	CHK	Tue, Jan 7, 2003	8.51	8.51	8.09	8.30
2478	NASDAQ	CHK	Mon, Jan 6, 2003	8.46	8.72	8.40	8.51
2477	NASDAQ	CHK	Fri, Jan 3, 2003	8.55	8.72	8.43	8.72
2476	NASDAQ	CHK	Thu, Jan 2, 2003	8.09	8.62	8.09	8.51
2475	NASDAQ	CHK	Tue, Dec 31, 2002	8.31	8.39	8.08	8.18
2474	NASDAQ	CHK	Mon, Dec 30, 2002	8.48	8.52	8.27	8.29
2473	NASDAQ	CHK	Fri, Dec 27, 2002	8.46	8.52	8.27	8.36
2472	NASDAQ	CHK	Thu, Dec 26, 2002	8.42	8.52	8.35	8.50
2471	NASDAQ	CHK	Tue, Dec 24, 2002	8.40	8.44	8.34	8.40
2470	NASDAQ	CHK	Mon, Dec 23, 2002	8.19	8.46	8.10	8.35
2469	NASDAQ	CHK	Fri, Dec 20, 2002	8.09	8.18	7.99	8.18
2468	NASDAQ	CHK	Thu, Dec 19, 2002	8.03	8.24	8.00	8.00
2467	NASDAQ	CHK	Wed, Dec 18, 2002	8.20	8.21	7.98	8.13
2466	NASDAQ	CHK	Tue, Dec 17, 2002	8.39	8.39	8.13	8.20
2465	NASDAQ	CHK	Mon, Dec 16, 2002	8.30	8.44	8.08	8.35
2464	NASDAQ	CHK	Fri, Dec 13, 2002	8.01	8.36	7.98	8.25
2463	NASDAQ	CHK	Thu, Dec 12, 2002	7.80	8.17	7.69	8.10
2462	NASDAQ	CHK	Wed, Dec 11, 2002	7.62	7.81	7.56	7.79
2461	NASDAQ	CHK	Tue, Dec 10, 2002	7.33	7.71	7.33	7.71
2460	NASDAQ	CHK	Mon, Dec 9, 2002	7.54	7.60	7.31	7.32
2459	NASDAQ	CHK	Fri, Dec 6, 2002	7.34	7.62	7.27	7.56
2458	NASDAQ	CHK	Thu, Dec 5, 2002	7.40	7.45	7.29	7.44
2457	NASDAQ	CHK	Wed, Dec 4, 2002	7.86	7.86	7.35	7.46
2456	NASDAQ	CHK	Tue, Dec 3, 2002	7.51	7.98	7.40	7.84
2455	NASDAQ	CHK	Mon, Dec 2, 2002	7.43	7.55	7.34	7.46
2454	NASDAQ	CHK	Fri, Nov 29, 2002	7.24	7.38	7.16	7.33
2453	NASDAQ	CHK	Wed, Nov 27, 2002	7.51	7.57	7.03	7.14
2452	NASDAQ	CHK	Tue, Nov 26, 2002	7.66	7.66	7.36	7.40
2451	NASDAQ	CHK	Mon, Nov 25, 2002	7.71	7.75	7.42	7.66
2450	NASDAQ	CHK	Fri, Nov 22, 2002	7.62	7.71	7.46	7.69
2449	NASDAQ	CHK	Thu, Nov 21, 2002	7.63	7.90	7.61	7.73
2448	NASDAQ	CHK	Wed, Nov 20, 2002	7.31	7.70	7.29	7.58
2447	NASDAQ	CHK	Tue, Nov 19, 2002	7.33	7.33	7.14	7.20
2446	NASDAQ	CHK	Mon, Nov 18, 2002	6.99	7.27	6.92	7.25
2445	NASDAQ	CHK	Fri, Nov 15, 2002	6.96	7.18	6.95	6.97
2444	NASDAQ	CHK	Thu, Nov 14, 2002	6.92	7.09	6.88	7.04
2443	NASDAQ	CHK	Wed, Nov 13, 2002	7.07	7.18	6.83	6.91
2442	NASDAQ	CHK	Tue, Nov 12, 2002	7.14	7.19	7.01	7.15
2441	NASDAQ	CHK	Mon, Nov 11, 2002	7.22	7.38	7.10	7.10
2440	NASDAQ	CHK	Fri, Nov 8, 2002	7.34	7.35	7.17	7.23
2439	NASDAQ	CHK	Thu, Nov 7, 2002	7.31	7.38	7.14	7.27
2438	NASDAQ	CHK	Wed, Nov 6, 2002	7.39	7.43	7.29	7.34
2437	NASDAQ	CHK	Tue, Nov 5, 2002	7.56	7.56	7.27	7.31
2436	NASDAQ	CHK	Mon, Nov 4, 2002	7.40	7.54	7.22	7.54
2435	NASDAQ	CHK	Fri, Nov 1, 2002	7.39	7.44	7.20	7.36
2434	NASDAQ	CHK	Thu, Oct 31, 2002	7.35	7.49	7.33	7.38
2433	NASDAQ	CHK	Wed, Oct 30, 2002	7.09	7.35	7.09	7.35
2432	NASDAQ	CHK	Tue, Oct 29, 2002	7.17	7.22	7.09	7.12
2431	NASDAQ	CHK	Mon, Oct 28, 2002	7.08	7.28	7.08	7.23
2430	NASDAQ	CHK	Fri, Oct 25, 2002	7.13	7.22	7.06	7.15
2429	NASDAQ	CHK	Thu, Oct 24, 2002	7.17	7.28	7.07	7.09
2428	NASDAQ	CHK	Wed, Oct 23, 2002	6.89	7.18	6.86	7.18
2427	NASDAQ	CHK	Tue, Oct 22, 2002	7.28	7.33	7.03	7.03
2426	NASDAQ	CHK	Mon, Oct 21, 2002	7.29	7.35	7.21	7.29
2425	NASDAQ	CHK	Fri, Oct 18, 2002	7.34	7.36	7.25	7.36
2424	NASDAQ	CHK	Thu, Oct 17, 2002	7.37	7.41	7.27	7.36
2423	NASDAQ	CHK	Wed, Oct 16, 2002	7.27	7.35	7.09	7.26
2422	NASDAQ	CHK	Tue, Oct 15, 2002	7.03	7.40	7.00	7.38
2421	NASDAQ	CHK	Mon, Oct 14, 2002	6.80	7.01	6.69	7.00
2420	NASDAQ	CHK	Fri, Oct 11, 2002	6.82	6.92	6.68	6.84
2419	NASDAQ	CHK	Thu, Oct 10, 2002	6.41	6.82	6.23	6.82
2418	NASDAQ	CHK	Wed, Oct 9, 2002	6.77	6.82	6.35	6.47
2417	NASDAQ	CHK	Tue, Oct 8, 2002	7.07	7.07	6.78	6.87
2416	NASDAQ	CHK	Mon, Oct 7, 2002	6.98	7.08	6.78	6.97
2415	NASDAQ	CHK	Fri, Oct 4, 2002	7.20	7.23	6.87	7.08
2414	NASDAQ	CHK	Thu, Oct 3, 2002	7.03	7.45	7.03	7.14
2413	NASDAQ	CHK	Wed, Oct 2, 2002	7.10	7.44	7.00	7.02
2412	NASDAQ	CHK	Tue, Oct 1, 2002	6.96	7.14	6.83	7.14
2411	NASDAQ	CHK	Mon, Sep 30, 2002	6.64	6.99	6.55	6.98
2410	NASDAQ	CHK	Fri, Sep 27, 2002	6.79	6.89	6.66	6.69
2409	NASDAQ	CHK	Thu, Sep 26, 2002	6.72	6.84	6.64	6.81
2408	NASDAQ	CHK	Wed, Sep 25, 2002	6.65	6.77	6.61	6.68
2407	NASDAQ	CHK	Tue, Sep 24, 2002	6.82	6.82	6.61	6.76
2406	NASDAQ	CHK	Mon, Sep 23, 2002	6.67	6.91	6.61	6.81
2405	NASDAQ	CHK	Fri, Sep 20, 2002	6.71	6.81	6.63	6.66
2404	NASDAQ	CHK	Thu, Sep 19, 2002	6.86	6.87	6.58	6.61
2403	NASDAQ	CHK	Wed, Sep 18, 2002	6.62	6.85	6.61	6.83
2402	NASDAQ	CHK	Tue, Sep 17, 2002	6.66	6.82	6.45	6.72
2401	NASDAQ	CHK	Mon, Sep 16, 2002	6.58	6.81	6.53	6.75
2400	NASDAQ	CHK	Fri, Sep 13, 2002	6.26	6.71	6.26	6.58
2399	NASDAQ	CHK	Thu, Sep 12, 2002	6.34	6.53	6.20	6.26
2398	NASDAQ	CHK	Wed, Sep 11, 2002	6.45	6.61	6.45	6.45
2397	NASDAQ	CHK	Tue, Sep 10, 2002	6.13	6.55	6.11	6.53
2396	NASDAQ	CHK	Mon, Sep 9, 2002	6.24	6.34	6.09	6.09
2395	NASDAQ	CHK	Fri, Sep 6, 2002	6.32	6.34	6.15	6.34
2394	NASDAQ	CHK	Thu, Sep 5, 2002	6.32	6.32	6.08	6.08
2393	NASDAQ	CHK	Wed, Sep 4, 2002	6.11	6.40	5.85	6.40
2392	NASDAQ	CHK	Tue, Sep 3, 2002	6.34	6.34	5.99	6.09
2391	NASDAQ	CHK	Fri, Aug 30, 2002	6.30	6.40	6.18	6.18
2390	NASDAQ	CHK	Thu, Aug 29, 2002	6.21	6.33	6.05	6.29
2389	NASDAQ	CHK	Wed, Aug 28, 2002	6.34	6.46	6.24	6.24
2388	NASDAQ	CHK	Tue, Aug 27, 2002	6.60	6.71	6.34	6.50
2387	NASDAQ	CHK	Mon, Aug 26, 2002	6.33	6.54	6.27	6.54
2386	NASDAQ	CHK	Fri, Aug 23, 2002	6.29	6.44	6.18	6.33
2385	NASDAQ	CHK	Thu, Aug 22, 2002	6.22	6.59	6.15	6.38
2384	NASDAQ	CHK	Wed, Aug 21, 2002	6.22	6.24	6.09	6.22
2383	NASDAQ	CHK	Tue, Aug 20, 2002	6.34	6.38	6.09	6.12
2382	NASDAQ	CHK	Mon, Aug 19, 2002	6.27	6.45	6.15	6.29
2381	NASDAQ	CHK	Fri, Aug 16, 2002	6.18	6.29	5.98	6.28
2380	NASDAQ	CHK	Thu, Aug 15, 2002	5.97	6.23	5.93	6.16
2379	NASDAQ	CHK	Wed, Aug 14, 2002	5.81	6.01	5.76	5.94
2378	NASDAQ	CHK	Tue, Aug 13, 2002	6.17	6.17	5.71	5.76
2377	NASDAQ	CHK	Mon, Aug 12, 2002	5.66	6.17	5.60	6.17
2376	NASDAQ	CHK	Fri, Aug 9, 2002	5.70	6.02	5.56	5.79
2375	NASDAQ	CHK	Thu, Aug 8, 2002	5.55	5.81	5.44	5.80
2374	NASDAQ	CHK	Wed, Aug 7, 2002	5.66	5.91	5.44	5.49
2373	NASDAQ	CHK	Tue, Aug 6, 2002	5.57	5.88	5.40	5.75
2372	NASDAQ	CHK	Mon, Aug 5, 2002	5.60	5.65	5.40	5.47
2371	NASDAQ	CHK	Fri, Aug 2, 2002	5.78	5.86	5.58	5.60
2370	NASDAQ	CHK	Thu, Aug 1, 2002	5.76	5.92	5.62	5.68
2369	NASDAQ	CHK	Wed, Jul 31, 2002	5.57	5.92	5.55	5.66
2368	NASDAQ	CHK	Tue, Jul 30, 2002	5.98	6.03	5.55	5.62
2367	NASDAQ	CHK	Mon, Jul 29, 2002	5.92	6.10	5.92	5.98
2366	NASDAQ	CHK	Fri, Jul 26, 2002	6.13	6.15	5.55	5.81
2365	NASDAQ	CHK	Thu, Jul 25, 2002	6.34	6.48	5.85	6.24
2364	NASDAQ	CHK	Wed, Jul 24, 2002	4.86	6.33	4.76	6.33
2363	NASDAQ	CHK	Tue, Jul 23, 2002	6.18	6.36	5.39	5.50
2362	NASDAQ	CHK	Mon, Jul 22, 2002	6.48	6.69	6.14	6.15
2361	NASDAQ	CHK	Fri, Jul 19, 2002	6.84	6.85	6.67	6.75
2360	NASDAQ	CHK	Thu, Jul 18, 2002	6.87	6.96	6.81	6.87
2359	NASDAQ	CHK	Wed, Jul 17, 2002	7.14	7.29	6.82	6.96
2358	NASDAQ	CHK	Tue, Jul 16, 2002	6.95	7.14	6.87	7.00
2357	NASDAQ	CHK	Mon, Jul 15, 2002	7.05	7.18	6.70	7.05
2356	NASDAQ	CHK	Fri, Jul 12, 2002	6.89	7.38	6.89	7.03
2355	NASDAQ	CHK	Thu, Jul 11, 2002	7.04	7.09	6.67	6.90
2354	NASDAQ	CHK	Wed, Jul 10, 2002	7.45	7.51	7.08	7.15
2353	NASDAQ	CHK	Tue, Jul 9, 2002	7.35	7.56	7.31	7.40
2352	NASDAQ	CHK	Mon, Jul 8, 2002	7.51	7.64	7.26	7.36
2351	NASDAQ	CHK	Fri, Jul 5, 2002	7.26	7.61	7.26	7.61
2350	NASDAQ	CHK	Wed, Jul 3, 2002	7.25	7.41	6.82	7.28
2349	NASDAQ	CHK	Tue, Jul 2, 2002	7.63	7.63	7.34	7.37
2348	NASDAQ	CHK	Mon, Jul 1, 2002	7.61	7.66	7.41	7.66
2347	NASDAQ	CHK	Fri, Jun 28, 2002	7.65	7.68	7.46	7.61
2346	NASDAQ	CHK	Thu, Jun 27, 2002	7.66	7.72	7.52	7.72
2345	NASDAQ	CHK	Wed, Jun 26, 2002	7.70	7.84	7.45	7.61
2344	NASDAQ	CHK	Tue, Jun 25, 2002	7.75	7.92	7.72	7.88
2343	NASDAQ	CHK	Mon, Jun 24, 2002	7.72	7.92	7.68	7.71
2342	NASDAQ	CHK	Fri, Jun 21, 2002	7.87	7.87	7.58	7.68
2341	NASDAQ	CHK	Thu, Jun 20, 2002	7.79	8.02	7.55	7.73
2340	NASDAQ	CHK	Wed, Jun 19, 2002	7.56	7.93	7.53	7.90
2339	NASDAQ	CHK	Tue, Jun 18, 2002	7.65	7.77	7.62	7.72
2338	NASDAQ	CHK	Mon, Jun 17, 2002	7.52	7.65	7.52	7.65
2337	NASDAQ	CHK	Fri, Jun 14, 2002	7.29	7.44	7.20	7.41
2336	NASDAQ	CHK	Thu, Jun 13, 2002	7.51	7.61	7.39	7.40
2335	NASDAQ	CHK	Wed, Jun 12, 2002	7.49	7.58	7.37	7.58
2334	NASDAQ	CHK	Tue, Jun 11, 2002	7.56	7.61	7.41	7.49
2333	NASDAQ	CHK	Mon, Jun 10, 2002	7.64	7.66	7.53	7.56
2332	NASDAQ	CHK	Fri, Jun 7, 2002	7.49	7.83	7.40	7.73
2331	NASDAQ	CHK	Thu, Jun 6, 2002	7.61	7.70	7.57	7.64
2330	NASDAQ	CHK	Wed, Jun 5, 2002	7.61	7.83	7.57	7.62
2329	NASDAQ	CHK	Tue, Jun 4, 2002	7.59	7.78	7.57	7.59
2328	NASDAQ	CHK	Mon, Jun 3, 2002	7.93	7.98	7.63	7.66
2327	NASDAQ	CHK	Fri, May 31, 2002	7.73	8.03	7.58	7.95
2326	NASDAQ	CHK	Thu, May 30, 2002	7.91	8.02	7.56	7.62
2325	NASDAQ	CHK	Wed, May 29, 2002	8.00	8.12	7.83	7.98
2324	NASDAQ	CHK	Tue, May 28, 2002	7.93	8.14	7.93	8.11
2323	NASDAQ	CHK	Fri, May 24, 2002	8.09	8.12	7.79	7.82
2322	NASDAQ	CHK	Thu, May 23, 2002	8.02	8.02	7.89	8.00
2321	NASDAQ	CHK	Wed, May 22, 2002	8.03	8.03	7.90	8.02
2320	NASDAQ	CHK	Tue, May 21, 2002	7.98	8.14	7.91	8.03
2319	NASDAQ	CHK	Mon, May 20, 2002	7.98	8.02	7.92	7.98
2318	NASDAQ	CHK	Fri, May 17, 2002	8.25	8.25	7.97	8.02
2317	NASDAQ	CHK	Thu, May 16, 2002	8.38	8.46	8.16	8.19
2316	NASDAQ	CHK	Wed, May 15, 2002	8.49	8.49	8.19	8.28
2315	NASDAQ	CHK	Tue, May 14, 2002	8.46	8.50	8.31	8.47
2314	NASDAQ	CHK	Mon, May 13, 2002	8.19	8.51	8.09	8.51
2313	NASDAQ	CHK	Fri, May 10, 2002	8.23	8.38	7.93	8.18
2312	NASDAQ	CHK	Thu, May 9, 2002	8.50	8.50	8.21	8.21
2311	NASDAQ	CHK	Wed, May 8, 2002	8.29	8.56	8.29	8.53
2310	NASDAQ	CHK	Tue, May 7, 2002	8.25	8.43	8.08	8.26
2309	NASDAQ	CHK	Mon, May 6, 2002	8.77	8.77	8.29	8.29
2308	NASDAQ	CHK	Fri, May 3, 2002	8.77	8.93	8.73	8.88
2307	NASDAQ	CHK	Thu, May 2, 2002	8.88	8.98	8.67	8.77
2306	NASDAQ	CHK	Wed, May 1, 2002	8.97	9.04	8.73	9.04
2305	NASDAQ	CHK	Tue, Apr 30, 2002	8.64	9.04	8.51	9.04
2304	NASDAQ	CHK	Mon, Apr 29, 2002	8.86	8.87	8.57	8.83
2303	NASDAQ	CHK	Fri, Apr 26, 2002	8.82	8.97	8.62	8.97
2302	NASDAQ	CHK	Thu, Apr 25, 2002	8.40	8.82	8.35	8.82
2301	NASDAQ	CHK	Wed, Apr 24, 2002	8.61	8.68	8.36	8.51
2300	NASDAQ	CHK	Tue, Apr 23, 2002	8.50	8.70	8.35	8.65
2299	NASDAQ	CHK	Mon, Apr 22, 2002	8.48	8.70	8.35	8.49
2298	NASDAQ	CHK	Fri, Apr 19, 2002	8.43	8.62	8.31	8.50
2297	NASDAQ	CHK	Thu, Apr 18, 2002	8.51	8.52	8.37	8.43
2296	NASDAQ	CHK	Wed, Apr 17, 2002	8.44	8.63	8.35	8.57
2295	NASDAQ	CHK	Tue, Apr 16, 2002	8.37	8.44	8.18	8.44
2294	NASDAQ	CHK	Mon, Apr 15, 2002	8.14	8.36	8.10	8.35
2293	NASDAQ	CHK	Fri, Apr 12, 2002	8.05	8.06	7.64	8.03
2292	NASDAQ	CHK	Thu, Apr 11, 2002	8.03	8.34	8.03	8.06
2291	NASDAQ	CHK	Wed, Apr 10, 2002	7.86	8.19	7.86	8.09
2290	NASDAQ	CHK	Tue, Apr 9, 2002	8.01	8.01	7.81	7.88
2289	NASDAQ	CHK	Mon, Apr 8, 2002	8.03	8.25	7.93	8.02
2288	NASDAQ	CHK	Fri, Apr 5, 2002	8.21	8.27	7.89	8.06
2287	NASDAQ	CHK	Thu, Apr 4, 2002	8.19	8.30	8.14	8.25
2286	NASDAQ	CHK	Wed, Apr 3, 2002	8.62	8.62	8.13	8.30
2285	NASDAQ	CHK	Tue, Apr 2, 2002	8.52	8.62	8.21	8.61
2284	NASDAQ	CHK	Mon, Apr 1, 2002	8.28	8.52	8.09	8.52
2283	NASDAQ	CHK	Thu, Mar 28, 2002	7.77	8.23	7.74	8.18
2282	NASDAQ	CHK	Wed, Mar 27, 2002	7.35	7.82	7.35	7.80
2281	NASDAQ	CHK	Tue, Mar 26, 2002	7.51	7.56	7.35	7.39
2280	NASDAQ	CHK	Mon, Mar 25, 2002	7.39	7.51	7.39	7.51
2279	NASDAQ	CHK	Fri, Mar 22, 2002	7.56	7.56	7.41	7.54
2278	NASDAQ	CHK	Thu, Mar 21, 2002	7.51	7.56	7.31	7.55
2277	NASDAQ	CHK	Wed, Mar 20, 2002	7.60	7.61	7.42	7.53
2276	NASDAQ	CHK	Tue, Mar 19, 2002	7.82	7.82	7.56	7.62
2275	NASDAQ	CHK	Mon, Mar 18, 2002	7.82	7.84	7.58	7.81
2274	NASDAQ	CHK	Fri, Mar 15, 2002	7.36	7.69	7.29	7.65
2273	NASDAQ	CHK	Thu, Mar 14, 2002	7.34	7.43	7.29	7.39
2272	NASDAQ	CHK	Wed, Mar 13, 2002	7.29	7.35	7.21	7.33
2271	NASDAQ	CHK	Tue, Mar 12, 2002	7.40	7.40	7.20	7.33
2270	NASDAQ	CHK	Mon, Mar 11, 2002	7.24	7.46	7.24	7.40
2269	NASDAQ	CHK	Fri, Mar 8, 2002	7.17	7.40	7.12	7.21
2268	NASDAQ	CHK	Thu, Mar 7, 2002	6.98	7.38	6.95	7.18
2267	NASDAQ	CHK	Wed, Mar 6, 2002	6.80	7.07	6.71	6.94
2266	NASDAQ	CHK	Tue, Mar 5, 2002	6.66	6.82	6.65	6.81
2265	NASDAQ	CHK	Mon, Mar 4, 2002	6.51	6.78	6.51	6.75
2264	NASDAQ	CHK	Fri, Mar 1, 2002	6.63	6.66	6.47	6.50
2263	NASDAQ	CHK	Thu, Feb 28, 2002	6.45	6.66	6.44	6.63
2262	NASDAQ	CHK	Wed, Feb 27, 2002	6.36	6.50	6.36	6.43
2261	NASDAQ	CHK	Tue, Feb 26, 2002	6.50	6.59	6.35	6.35
2260	NASDAQ	CHK	Mon, Feb 25, 2002	6.22	6.55	6.22	6.55
2259	NASDAQ	CHK	Fri, Feb 22, 2002	6.13	6.23	5.94	6.22
2258	NASDAQ	CHK	Thu, Feb 21, 2002	5.73	6.13	5.72	5.96
2257	NASDAQ	CHK	Wed, Feb 20, 2002	5.66	5.73	5.56	5.73
2256	NASDAQ	CHK	Tue, Feb 19, 2002	5.66	5.80	5.63	5.68
2255	NASDAQ	CHK	Fri, Feb 15, 2002	5.76	5.79	5.60	5.67
2254	NASDAQ	CHK	Thu, Feb 14, 2002	5.81	5.91	5.67	5.73
2253	NASDAQ	CHK	Wed, Feb 13, 2002	5.84	5.89	5.76	5.76
2252	NASDAQ	CHK	Tue, Feb 12, 2002	5.87	5.93	5.78	5.81
2251	NASDAQ	CHK	Mon, Feb 11, 2002	5.97	6.07	5.87	5.88
2250	NASDAQ	CHK	Fri, Feb 8, 2002	6.13	6.16	5.98	6.03
2249	NASDAQ	CHK	Thu, Feb 7, 2002	6.18	6.18	6.08	6.13
2248	NASDAQ	CHK	Wed, Feb 6, 2002	5.87	6.09	5.87	6.08
2247	NASDAQ	CHK	Tue, Feb 5, 2002	5.73	5.83	5.51	5.83
2246	NASDAQ	CHK	Mon, Feb 4, 2002	5.90	5.91	5.60	5.73
2245	NASDAQ	CHK	Fri, Feb 1, 2002	6.20	6.20	5.84	5.90
2244	NASDAQ	CHK	Thu, Jan 31, 2002	5.81	6.23	5.81	6.23
2243	NASDAQ	CHK	Wed, Jan 30, 2002	5.73	5.89	5.50	5.85
2242	NASDAQ	CHK	Tue, Jan 29, 2002	5.81	5.97	5.53	5.62
2241	NASDAQ	CHK	Mon, Jan 28, 2002	5.92	5.97	5.71	5.80
2240	NASDAQ	CHK	Fri, Jan 25, 2002	5.98	6.03	5.75	5.97
2239	NASDAQ	CHK	Thu, Jan 24, 2002	5.81	6.03	5.76	5.98
2238	NASDAQ	CHK	Wed, Jan 23, 2002	5.54	5.81	5.34	5.81
2237	NASDAQ	CHK	Tue, Jan 22, 2002	6.03	6.05	5.44	5.44
2236	NASDAQ	CHK	Fri, Jan 18, 2002	6.10	6.18	5.99	5.99
2235	NASDAQ	CHK	Thu, Jan 17, 2002	6.39	6.39	6.13	6.13
2234	NASDAQ	CHK	Wed, Jan 16, 2002	6.34	6.35	6.11	6.34
2233	NASDAQ	CHK	Tue, Jan 15, 2002	6.38	6.54	6.29	6.38
2232	NASDAQ	CHK	Mon, Jan 14, 2002	6.26	6.34	5.92	6.34
2231	NASDAQ	CHK	Fri, Jan 11, 2002	6.42	6.42	6.25	6.26
2230	NASDAQ	CHK	Thu, Jan 10, 2002	6.41	6.42	6.31	6.42
2229	NASDAQ	CHK	Wed, Jan 9, 2002	6.57	6.65	6.39	6.45
2228	NASDAQ	CHK	Tue, Jan 8, 2002	6.52	6.61	6.48	6.58
2227	NASDAQ	CHK	Mon, Jan 7, 2002	6.71	6.76	6.46	6.48
2226	NASDAQ	CHK	Fri, Jan 4, 2002	6.80	6.87	6.70	6.75
2225	NASDAQ	CHK	Thu, Jan 3, 2002	7.08	7.18	6.82	6.84
2224	NASDAQ	CHK	Wed, Jan 2, 2002	7.05	7.08	6.85	7.07
2223	NASDAQ	CHK	Mon, Dec 31, 2001	7.09	7.22	6.99	6.99
2222	NASDAQ	CHK	Fri, Dec 28, 2001	6.97	7.18	6.92	7.16
2221	NASDAQ	CHK	Thu, Dec 27, 2001	6.96	7.10	6.90	6.95
2220	NASDAQ	CHK	Wed, Dec 26, 2001	7.08	7.26	6.96	6.96
2219	NASDAQ	CHK	Mon, Dec 24, 2001	6.92	7.08	6.90	7.08
2218	NASDAQ	CHK	Fri, Dec 21, 2001	6.77	7.04	6.68	6.97
2217	NASDAQ	CHK	Thu, Dec 20, 2001	6.72	6.85	6.63	6.66
2216	NASDAQ	CHK	Wed, Dec 19, 2001	6.77	7.01	6.66	6.73
2215	NASDAQ	CHK	Tue, Dec 18, 2001	6.47	6.88	6.45	6.87
2214	NASDAQ	CHK	Mon, Dec 17, 2001	6.47	6.60	6.40	6.49
2213	NASDAQ	CHK	Fri, Dec 14, 2001	6.48	6.54	6.41	6.46
2212	NASDAQ	CHK	Thu, Dec 13, 2001	6.50	6.61	6.39	6.43
2211	NASDAQ	CHK	Wed, Dec 12, 2001	6.82	6.82	6.48	6.65
2210	NASDAQ	CHK	Tue, Dec 11, 2001	6.61	6.82	6.60	6.72
2209	NASDAQ	CHK	Mon, Dec 10, 2001	6.50	6.63	6.42	6.45
2208	NASDAQ	CHK	Fri, Dec 7, 2001	6.75	6.82	6.50	6.50
2207	NASDAQ	CHK	Thu, Dec 6, 2001	6.99	7.06	6.68	6.76
2206	NASDAQ	CHK	Wed, Dec 5, 2001	6.97	7.13	6.95	7.09
2205	NASDAQ	CHK	Tue, Dec 4, 2001	6.87	7.10	6.83	6.98
2204	NASDAQ	CHK	Mon, Dec 3, 2001	6.72	6.83	6.59	6.82
2203	NASDAQ	CHK	Fri, Nov 30, 2001	6.66	6.77	6.61	6.77
2202	NASDAQ	CHK	Thu, Nov 29, 2001	6.61	6.66	6.46	6.66
2201	NASDAQ	CHK	Wed, Nov 28, 2001	6.71	6.71	6.52	6.61
2200	NASDAQ	CHK	Tue, Nov 27, 2001	6.52	6.80	6.52	6.68
2199	NASDAQ	CHK	Mon, Nov 26, 2001	6.61	6.64	6.47	6.58
2198	NASDAQ	CHK	Fri, Nov 23, 2001	6.77	6.77	6.61	6.66
2197	NASDAQ	CHK	Wed, Nov 21, 2001	6.71	6.84	6.63	6.78
2196	NASDAQ	CHK	Tue, Nov 20, 2001	6.60	6.81	6.55	6.75
2195	NASDAQ	CHK	Mon, Nov 19, 2001	6.53	6.58	6.40	6.53
2194	NASDAQ	CHK	Fri, Nov 16, 2001	6.55	6.61	6.39	6.53
2193	NASDAQ	CHK	Thu, Nov 15, 2001	6.87	6.88	6.40	6.71
2192	NASDAQ	CHK	Wed, Nov 14, 2001	7.24	7.25	6.92	7.07
2191	NASDAQ	CHK	Tue, Nov 13, 2001	7.34	7.34	7.14	7.23
2190	NASDAQ	CHK	Mon, Nov 12, 2001	7.19	7.34	6.87	7.34
2189	NASDAQ	CHK	Fri, Nov 9, 2001	7.06	7.36	7.03	7.22
2188	NASDAQ	CHK	Thu, Nov 8, 2001	6.54	7.05	6.54	7.03
2187	NASDAQ	CHK	Wed, Nov 7, 2001	6.40	6.54	6.24	6.52
2186	NASDAQ	CHK	Tue, Nov 6, 2001	6.66	6.66	6.36	6.46
2185	NASDAQ	CHK	Mon, Nov 5, 2001	7.17	7.17	6.55	6.65
2184	NASDAQ	CHK	Fri, Nov 2, 2001	7.56	7.56	7.13	7.17
2183	NASDAQ	CHK	Thu, Nov 1, 2001	7.70	7.86	7.70	7.77
2182	NASDAQ	CHK	Wed, Oct 31, 2001	7.57	7.81	7.47	7.66
2181	NASDAQ	CHK	Tue, Oct 30, 2001	7.91	7.91	7.37	7.61
2180	NASDAQ	CHK	Mon, Oct 29, 2001	7.87	8.02	7.83	7.87
2179	NASDAQ	CHK	Fri, Oct 26, 2001	7.71	7.87	7.66	7.86
2178	NASDAQ	CHK	Thu, Oct 25, 2001	7.93	7.93	7.56	7.70
2177	NASDAQ	CHK	Wed, Oct 24, 2001	7.19	7.51	7.17	7.49
2176	NASDAQ	CHK	Tue, Oct 23, 2001	7.19	7.40	7.17	7.38
2175	NASDAQ	CHK	Mon, Oct 22, 2001	7.17	7.23	7.01	7.23
2174	NASDAQ	CHK	Fri, Oct 19, 2001	6.96	7.35	6.90	7.06
2173	NASDAQ	CHK	Thu, Oct 18, 2001	7.14	7.19	6.88	6.88
2172	NASDAQ	CHK	Wed, Oct 17, 2001	7.24	7.35	7.08	7.08
2171	NASDAQ	CHK	Tue, Oct 16, 2001	6.87	7.29	6.87	7.28
2170	NASDAQ	CHK	Mon, Oct 15, 2001	6.98	6.99	6.81	6.86
2169	NASDAQ	CHK	Fri, Oct 12, 2001	7.08	7.12	6.87	7.06
2168	NASDAQ	CHK	Thu, Oct 11, 2001	7.29	7.36	6.96	7.01
2167	NASDAQ	CHK	Wed, Oct 10, 2001	7.12	7.39	7.09	7.39
2166	NASDAQ	CHK	Tue, Oct 9, 2001	6.87	7.10	6.81	7.06
2165	NASDAQ	CHK	Mon, Oct 8, 2001	6.92	6.95	6.75	6.91
2164	NASDAQ	CHK	Fri, Oct 5, 2001	6.92	7.07	6.61	6.96
2163	NASDAQ	CHK	Thu, Oct 4, 2001	6.23	6.90	6.13	6.90
2162	NASDAQ	CHK	Wed, Oct 3, 2001	5.81	6.24	5.68	6.21
2161	NASDAQ	CHK	Tue, Oct 2, 2001	5.84	6.01	5.59	5.91
2160	NASDAQ	CHK	Mon, Oct 1, 2001	5.92	5.96	5.56	5.92
2159	NASDAQ	CHK	Fri, Sep 28, 2001	5.42	5.97	5.42	5.97
2158	NASDAQ	CHK	Thu, Sep 27, 2001	5.29	5.41	5.13	5.39
2157	NASDAQ	CHK	Wed, Sep 26, 2001	5.41	5.43	5.19	5.30
2156	NASDAQ	CHK	Tue, Sep 25, 2001	5.52	5.54	5.29	5.41
2155	NASDAQ	CHK	Mon, Sep 24, 2001	5.24	5.55	5.23	5.51
2154	NASDAQ	CHK	Fri, Sep 21, 2001	5.23	5.39	4.76	5.28
2153	NASDAQ	CHK	Thu, Sep 20, 2001	5.57	5.65	5.04	5.29
2152	NASDAQ	CHK	Wed, Sep 19, 2001	5.96	6.01	5.09	5.63
2151	NASDAQ	CHK	Tue, Sep 18, 2001	6.55	6.55	5.92	5.92
2150	NASDAQ	CHK	Mon, Sep 17, 2001	7.19	7.20	6.48	6.55
2149	NASDAQ	CHK	Mon, Sep 10, 2001	6.40	6.60	6.40	6.55
2148	NASDAQ	CHK	Fri, Sep 7, 2001	6.55	6.55	6.40	6.40
2147	NASDAQ	CHK	Thu, Sep 6, 2001	6.36	6.54	6.34	6.54
2146	NASDAQ	CHK	Wed, Sep 5, 2001	6.50	6.50	6.34	6.40
2145	NASDAQ	CHK	Tue, Sep 4, 2001	6.35	6.53	6.34	6.46
2144	NASDAQ	CHK	Fri, Aug 31, 2001	6.34	6.47	6.30	6.30
2143	NASDAQ	CHK	Thu, Aug 30, 2001	6.34	6.40	6.29	6.32
2142	NASDAQ	CHK	Wed, Aug 29, 2001	6.50	6.52	6.31	6.32
2141	NASDAQ	CHK	Tue, Aug 28, 2001	6.60	6.60	6.36	6.42
2140	NASDAQ	CHK	Mon, Aug 27, 2001	6.42	6.55	6.35	6.53
2139	NASDAQ	CHK	Fri, Aug 24, 2001	6.40	6.49	6.34	6.39
2138	NASDAQ	CHK	Thu, Aug 23, 2001	6.41	6.43	6.29	6.40
2137	NASDAQ	CHK	Wed, Aug 22, 2001	6.46	6.92	6.41	6.41
2136	NASDAQ	CHK	Tue, Aug 21, 2001	6.41	6.67	6.39	6.39
2135	NASDAQ	CHK	Mon, Aug 20, 2001	6.65	6.65	6.46	6.47
2134	NASDAQ	CHK	Fri, Aug 17, 2001	6.77	6.77	6.53	6.67
2133	NASDAQ	CHK	Thu, Aug 16, 2001	6.88	7.00	6.59	6.75
2132	NASDAQ	CHK	Wed, Aug 15, 2001	6.46	6.89	6.38	6.78
2131	NASDAQ	CHK	Tue, Aug 14, 2001	6.26	6.51	6.26	6.39
2130	NASDAQ	CHK	Mon, Aug 13, 2001	6.18	6.36	6.15	6.15
2129	NASDAQ	CHK	Fri, Aug 10, 2001	6.09	6.33	6.08	6.11
2128	NASDAQ	CHK	Thu, Aug 9, 2001	6.23	6.27	5.99	6.01
2127	NASDAQ	CHK	Wed, Aug 8, 2001	6.54	6.57	6.13	6.13
2126	NASDAQ	CHK	Tue, Aug 7, 2001	6.44	6.57	6.42	6.47
2125	NASDAQ	CHK	Mon, Aug 6, 2001	6.68	6.73	6.40	6.40
2124	NASDAQ	CHK	Fri, Aug 3, 2001	6.87	6.87	6.61	6.61
2123	NASDAQ	CHK	Thu, Aug 2, 2001	6.73	6.90	6.69	6.77
2122	NASDAQ	CHK	Wed, Aug 1, 2001	6.85	7.03	6.63	6.63
2121	NASDAQ	CHK	Tue, Jul 31, 2001	7.06	7.10	6.80	6.83
2120	NASDAQ	CHK	Mon, Jul 30, 2001	7.19	7.29	6.98	7.05
2119	NASDAQ	CHK	Fri, Jul 27, 2001	6.77	7.35	6.40	7.08
2118	NASDAQ	CHK	Thu, Jul 26, 2001	7.14	7.36	7.12	7.29
2117	NASDAQ	CHK	Wed, Jul 25, 2001	6.50	7.17	6.50	7.14
2116	NASDAQ	CHK	Tue, Jul 24, 2001	7.07	7.07	6.55	6.55
2115	NASDAQ	CHK	Mon, Jul 23, 2001	6.90	6.98	6.78	6.87
2114	NASDAQ	CHK	Fri, Jul 20, 2001	6.76	6.94	6.76	6.78
2113	NASDAQ	CHK	Thu, Jul 19, 2001	6.62	6.81	6.62	6.69
2112	NASDAQ	CHK	Wed, Jul 18, 2001	6.80	6.82	6.50	6.62
2111	NASDAQ	CHK	Tue, Jul 17, 2001	6.34	6.81	6.34	6.75
2110	NASDAQ	CHK	Mon, Jul 16, 2001	6.59	6.61	6.30	6.45
2109	NASDAQ	CHK	Fri, Jul 13, 2001	6.18	6.68	6.14	6.59
2108	NASDAQ	CHK	Thu, Jul 12, 2001	6.38	6.45	6.24	6.29
2107	NASDAQ	CHK	Wed, Jul 11, 2001	6.48	6.61	6.12	6.38
2106	NASDAQ	CHK	Tue, Jul 10, 2001	6.69	6.76	6.40	6.46
2105	NASDAQ	CHK	Mon, Jul 9, 2001	6.86	6.87	6.45	6.64
2104	NASDAQ	CHK	Fri, Jul 6, 2001	6.85	6.86	6.71	6.81
2103	NASDAQ	CHK	Thu, Jul 5, 2001	6.71	6.98	6.71	6.87
2102	NASDAQ	CHK	Tue, Jul 3, 2001	6.72	6.85	6.66	6.68
2101	NASDAQ	CHK	Mon, Jul 2, 2001	7.19	7.19	6.77	6.82
2100	NASDAQ	CHK	Fri, Jun 29, 2001	6.92	7.19	6.88	7.19
2099	NASDAQ	CHK	Thu, Jun 28, 2001	6.91	6.95	6.55	6.66
2098	NASDAQ	CHK	Wed, Jun 27, 2001	7.36	7.40	6.87	7.02
2097	NASDAQ	CHK	Tue, Jun 26, 2001	6.84	7.26	6.66	7.17
2096	NASDAQ	CHK	Mon, Jun 25, 2001	7.40	7.42	6.87	6.95
2095	NASDAQ	CHK	Fri, Jun 22, 2001	7.36	7.45	7.29	7.39
2094	NASDAQ	CHK	Thu, Jun 21, 2001	7.54	7.76	6.87	7.43
2093	NASDAQ	CHK	Wed, Jun 20, 2001	8.09	8.28	7.42	7.72
2092	NASDAQ	CHK	Tue, Jun 19, 2001	8.31	8.43	7.96	8.18
2091	NASDAQ	CHK	Mon, Jun 18, 2001	8.34	8.52	8.11	8.25
2090	NASDAQ	CHK	Fri, Jun 15, 2001	8.42	8.44	8.20	8.35
2089	NASDAQ	CHK	Thu, Jun 14, 2001	8.65	8.65	8.36	8.44
2088	NASDAQ	CHK	Wed, Jun 13, 2001	8.93	9.11	8.67	8.67
2087	NASDAQ	CHK	Tue, Jun 12, 2001	8.88	8.98	8.63	8.93
2086	NASDAQ	CHK	Mon, Jun 11, 2001	8.87	8.91	8.63	8.77
2085	NASDAQ	CHK	Fri, Jun 8, 2001	8.67	8.77	8.53	8.73
2084	NASDAQ	CHK	Thu, Jun 7, 2001	8.81	8.81	8.56	8.56
2083	NASDAQ	CHK	Wed, Jun 6, 2001	9.14	9.16	8.75	8.77
2082	NASDAQ	CHK	Tue, Jun 5, 2001	9.53	9.62	9.10	9.23
2081	NASDAQ	CHK	Mon, Jun 4, 2001	8.88	9.56	8.88	9.51
2080	NASDAQ	CHK	Fri, Jun 1, 2001	8.77	8.81	8.57	8.77
2079	NASDAQ	CHK	Thu, May 31, 2001	8.73	8.88	8.65	8.72
2078	NASDAQ	CHK	Wed, May 30, 2001	8.91	8.91	8.56	8.77
2077	NASDAQ	CHK	Tue, May 29, 2001	9.18	9.39	8.73	8.92
2076	NASDAQ	CHK	Fri, May 25, 2001	9.31	9.36	9.10	9.10
2075	NASDAQ	CHK	Thu, May 24, 2001	9.50	9.51	9.25	9.25
2074	NASDAQ	CHK	Wed, May 23, 2001	9.67	9.77	9.32	9.45
2073	NASDAQ	CHK	Tue, May 22, 2001	9.97	9.97	9.55	9.65
2072	NASDAQ	CHK	Mon, May 21, 2001	9.71	9.78	9.64	9.72
2071	NASDAQ	CHK	Fri, May 18, 2001	9.73	9.80	9.53	9.55
2070	NASDAQ	CHK	Thu, May 17, 2001	9.62	9.83	9.39	9.63
2069	NASDAQ	CHK	Wed, May 16, 2001	9.99	9.99	9.25	9.51
2068	NASDAQ	CHK	Tue, May 15, 2001	9.77	9.99	9.67	9.79
2067	NASDAQ	CHK	Mon, May 14, 2001	9.23	9.67	9.23	9.61
2066	NASDAQ	CHK	Fri, May 11, 2001	9.10	9.14	9.04	9.09
2065	NASDAQ	CHK	Thu, May 10, 2001	8.94	9.17	8.94	9.06
2064	NASDAQ	CHK	Wed, May 9, 2001	8.82	8.91	8.75	8.91
2063	NASDAQ	CHK	Tue, May 8, 2001	8.91	8.94	8.62	8.81
2062	NASDAQ	CHK	Mon, May 7, 2001	8.86	9.03	8.74	8.84
2061	NASDAQ	CHK	Fri, May 4, 2001	8.67	8.86	8.67	8.76
2060	NASDAQ	CHK	Thu, May 3, 2001	8.62	8.82	8.56	8.56
2059	NASDAQ	CHK	Wed, May 2, 2001	9.25	9.26	8.55	8.55
2058	NASDAQ	CHK	Tue, May 1, 2001	9.19	9.34	8.90	9.26
2057	NASDAQ	CHK	Mon, Apr 30, 2001	8.72	9.04	8.58	8.77
2056	NASDAQ	CHK	Fri, Apr 27, 2001	8.49	8.54	8.19	8.23
2055	NASDAQ	CHK	Thu, Apr 26, 2001	8.30	8.64	8.26	8.46
2054	NASDAQ	CHK	Wed, Apr 25, 2001	8.14	8.30	8.03	8.24
2053	NASDAQ	CHK	Tue, Apr 24, 2001	8.40	8.52	8.08	8.14
2052	NASDAQ	CHK	Mon, Apr 23, 2001	8.19	8.47	8.14	8.40
2051	NASDAQ	CHK	Fri, Apr 20, 2001	8.23	8.38	7.88	8.10
2050	NASDAQ	CHK	Thu, Apr 19, 2001	8.52	8.55	7.93	8.19
2049	NASDAQ	CHK	Wed, Apr 18, 2001	8.95	8.95	8.40	8.45
2048	NASDAQ	CHK	Tue, Apr 17, 2001	8.99	9.20	8.75	8.91
2047	NASDAQ	CHK	Mon, Apr 16, 2001	9.57	9.81	9.48	9.60
2046	NASDAQ	CHK	Thu, Apr 12, 2001	9.25	9.71	9.22	9.54
2045	NASDAQ	CHK	Wed, Apr 11, 2001	9.54	9.71	9.14	9.20
2044	NASDAQ	CHK	Tue, Apr 10, 2001	9.25	9.64	9.25	9.51
2043	NASDAQ	CHK	Mon, Apr 9, 2001	8.88	9.27	8.84	9.26
2042	NASDAQ	CHK	Fri, Apr 6, 2001	8.83	9.14	8.47	8.77
2041	NASDAQ	CHK	Thu, Apr 5, 2001	8.77	8.85	8.48	8.83
2040	NASDAQ	CHK	Wed, Apr 4, 2001	8.03	8.66	7.99	8.49
2039	NASDAQ	CHK	Tue, Apr 3, 2001	8.72	8.72	7.94	8.09
2038	NASDAQ	CHK	Mon, Apr 2, 2001	9.20	9.30	8.46	8.72
2037	NASDAQ	CHK	Fri, Mar 30, 2001	8.93	9.36	8.70	9.36
2036	NASDAQ	CHK	Thu, Mar 29, 2001	8.80	8.83	8.09	8.65
2035	NASDAQ	CHK	Wed, Mar 28, 2001	9.17	9.23	8.88	8.88
2034	NASDAQ	CHK	Tue, Mar 27, 2001	9.20	9.26	9.00	9.17
2033	NASDAQ	CHK	Mon, Mar 26, 2001	9.40	9.58	9.00	9.19
2032	NASDAQ	CHK	Fri, Mar 23, 2001	9.09	9.61	9.09	9.40
2031	NASDAQ	CHK	Thu, Mar 22, 2001	9.42	9.46	8.58	9.09
2030	NASDAQ	CHK	Wed, Mar 21, 2001	9.93	9.93	9.41	9.41
2029	NASDAQ	CHK	Tue, Mar 20, 2001	9.71	10.29	9.71	9.82
2028	NASDAQ	CHK	Mon, Mar 19, 2001	9.51	9.76	9.51	9.68
2027	NASDAQ	CHK	Fri, Mar 16, 2001	9.46	9.62	9.30	9.51
2026	NASDAQ	CHK	Thu, Mar 15, 2001	9.73	9.89	9.38	9.45
2025	NASDAQ	CHK	Wed, Mar 14, 2001	9.73	10.14	9.58	9.74
2024	NASDAQ	CHK	Tue, Mar 13, 2001	10.49	10.55	9.53	10.16
2023	NASDAQ	CHK	Mon, Mar 12, 2001	11.10	11.10	10.41	10.47
2022	NASDAQ	CHK	Fri, Mar 9, 2001	11.60	11.60	10.97	11.01
2021	NASDAQ	CHK	Thu, Mar 8, 2001	11.42	11.69	11.15	11.60
2020	NASDAQ	CHK	Wed, Mar 7, 2001	10.47	11.17	10.47	11.16
2019	NASDAQ	CHK	Tue, Mar 6, 2001	10.27	10.31	10.10	10.14
2018	NASDAQ	CHK	Mon, Mar 5, 2001	9.77	10.26	9.75	10.05
2017	NASDAQ	CHK	Fri, Mar 2, 2001	9.51	9.97	9.51	9.72
2016	NASDAQ	CHK	Thu, Mar 1, 2001	9.62	9.62	9.43	9.62
2015	NASDAQ	CHK	Wed, Feb 28, 2001	9.78	9.82	9.60	9.64
2014	NASDAQ	CHK	Tue, Feb 27, 2001	9.71	9.83	9.58	9.71
2013	NASDAQ	CHK	Mon, Feb 26, 2001	9.48	9.77	9.48	9.67
2012	NASDAQ	CHK	Fri, Feb 23, 2001	9.85	9.93	9.14	9.38
2011	NASDAQ	CHK	Thu, Feb 22, 2001	9.99	10.04	9.66	9.93
2010	NASDAQ	CHK	Wed, Feb 21, 2001	11.42	11.42	10.11	10.13
2009	NASDAQ	CHK	Tue, Feb 20, 2001	10.68	10.92	10.40	10.57
2008	NASDAQ	CHK	Fri, Feb 16, 2001	10.47	10.72	10.26	10.40
2007	NASDAQ	CHK	Thu, Feb 15, 2001	10.66	10.66	10.13	10.36
2006	NASDAQ	CHK	Wed, Feb 14, 2001	10.68	10.89	10.58	10.64
2005	NASDAQ	CHK	Tue, Feb 13, 2001	11.02	11.05	10.57	10.64
2004	NASDAQ	CHK	Mon, Feb 12, 2001	10.94	10.97	10.47	10.97
2003	NASDAQ	CHK	Fri, Feb 9, 2001	10.31	10.84	10.21	10.84
2002	NASDAQ	CHK	Thu, Feb 8, 2001	10.56	10.65	10.06	10.10
2001	NASDAQ	CHK	Wed, Feb 7, 2001	10.28	10.57	10.24	10.54
2000	NASDAQ	CHK	Tue, Feb 6, 2001	9.62	10.23	9.55	10.23
1999	NASDAQ	CHK	Mon, Feb 5, 2001	9.57	9.90	9.53	9.64
1998	NASDAQ	CHK	Fri, Feb 2, 2001	9.45	9.61	9.41	9.60
1997	NASDAQ	CHK	Thu, Feb 1, 2001	9.05	9.46	9.01	9.39
1996	NASDAQ	CHK	Wed, Jan 31, 2001	9.26	9.46	9.10	9.11
1995	NASDAQ	CHK	Tue, Jan 30, 2001	9.39	9.48	9.00	9.32
1994	NASDAQ	CHK	Mon, Jan 29, 2001	9.86	9.91	9.44	9.54
1993	NASDAQ	CHK	Fri, Jan 26, 2001	9.91	9.98	9.58	9.85
1992	NASDAQ	CHK	Thu, Jan 25, 2001	9.58	10.11	9.51	9.91
1991	NASDAQ	CHK	Wed, Jan 24, 2001	9.51	9.65	9.25	9.58
1990	NASDAQ	CHK	Tue, Jan 23, 2001	9.78	9.85	9.18	9.51
1989	NASDAQ	CHK	Mon, Jan 22, 2001	10.04	10.24	9.71	9.78
1988	NASDAQ	CHK	Fri, Jan 19, 2001	9.25	9.65	9.05	9.58
1987	NASDAQ	CHK	Thu, Jan 18, 2001	9.58	9.78	8.99	9.38
1986	NASDAQ	CHK	Wed, Jan 17, 2001	10.57	10.57	9.38	9.58
1985	NASDAQ	CHK	Tue, Jan 16, 2001	10.57	10.84	10.31	10.57
1984	NASDAQ	CHK	Fri, Jan 12, 2001	9.65	10.31	9.65	10.31
1983	NASDAQ	CHK	Thu, Jan 11, 2001	10.18	10.18	9.51	9.51
1982	NASDAQ	CHK	Wed, Jan 10, 2001	9.65	9.98	9.65	9.85
1981	NASDAQ	CHK	Tue, Jan 9, 2001	10.31	10.44	9.51	9.65
1980	NASDAQ	CHK	Mon, Jan 8, 2001	9.65	10.44	9.65	10.31
1979	NASDAQ	CHK	Fri, Jan 5, 2001	9.32	9.91	9.18	9.51
1978	NASDAQ	CHK	Thu, Jan 4, 2001	9.25	9.38	8.52	9.05
1977	NASDAQ	CHK	Wed, Jan 3, 2001	9.51	9.71	8.85	9.38
1976	NASDAQ	CHK	Tue, Jan 2, 2001	10.44	10.51	9.38	9.51
1975	NASDAQ	CHK	Fri, Dec 29, 2000	10.97	11.10	10.64	10.70
1974	NASDAQ	CHK	Thu, Dec 28, 2000	10.04	10.84	9.91	10.84
1973	NASDAQ	CHK	Wed, Dec 27, 2000	10.31	10.51	9.45	10.11
1972	NASDAQ	CHK	Tue, Dec 26, 2000	9.25	10.31	9.25	10.04
1971	NASDAQ	CHK	Fri, Dec 22, 2000	8.66	9.05	8.59	8.99
1970	NASDAQ	CHK	Thu, Dec 21, 2000	8.39	8.72	8.26	8.52
1969	NASDAQ	CHK	Wed, Dec 20, 2000	7.47	7.73	7.20	7.73
1968	NASDAQ	CHK	Tue, Dec 19, 2000	7.66	7.80	7.33	7.40
1967	NASDAQ	CHK	Mon, Dec 18, 2000	7.40	7.60	7.40	7.53
1966	NASDAQ	CHK	Fri, Dec 15, 2000	7.33	7.53	7.00	7.14
1965	NASDAQ	CHK	Thu, Dec 14, 2000	7.47	7.60	7.27	7.33
1964	NASDAQ	CHK	Wed, Dec 13, 2000	7.60	7.66	7.33	7.47
1963	NASDAQ	CHK	Tue, Dec 12, 2000	7.73	7.93	7.27	7.47
1962	NASDAQ	CHK	Mon, Dec 11, 2000	7.40	8.00	7.40	7.73
1961	NASDAQ	CHK	Fri, Dec 8, 2000	7.07	7.14	6.87	7.14
1960	NASDAQ	CHK	Thu, Dec 7, 2000	7.20	7.33	7.00	7.14
1959	NASDAQ	CHK	Wed, Dec 6, 2000	6.87	7.33	6.87	7.14
1958	NASDAQ	CHK	Tue, Dec 5, 2000	7.00	7.27	6.67	6.74
1957	NASDAQ	CHK	Mon, Dec 4, 2000	6.67	7.14	6.67	6.94
1956	NASDAQ	CHK	Fri, Dec 1, 2000	6.28	6.67	6.28	6.48
1955	NASDAQ	CHK	Thu, Nov 30, 2000	6.08	6.21	5.88	6.15
1954	NASDAQ	CHK	Wed, Nov 29, 2000	6.21	6.28	5.95	6.08
1953	NASDAQ	CHK	Tue, Nov 28, 2000	6.81	6.81	6.15	6.28
1952	NASDAQ	CHK	Mon, Nov 27, 2000	6.87	6.87	6.67	6.67
1951	NASDAQ	CHK	Fri, Nov 24, 2000	6.94	7.00	6.81	6.87
1950	NASDAQ	CHK	Wed, Nov 22, 2000	6.87	7.14	6.67	7.00
1949	NASDAQ	CHK	Tue, Nov 21, 2000	6.34	6.94	6.34	6.87
1948	NASDAQ	CHK	Mon, Nov 20, 2000	6.48	6.54	6.34	6.41
1947	NASDAQ	CHK	Fri, Nov 17, 2000	6.54	6.54	6.28	6.41
1946	NASDAQ	CHK	Thu, Nov 16, 2000	6.67	6.81	6.41	6.54
1945	NASDAQ	CHK	Wed, Nov 15, 2000	6.41	6.74	6.41	6.61
1944	NASDAQ	CHK	Tue, Nov 14, 2000	6.15	6.41	6.15	6.28
1943	NASDAQ	CHK	Mon, Nov 13, 2000	6.01	6.28	5.88	5.95
1942	NASDAQ	CHK	Fri, Nov 10, 2000	6.01	6.21	6.01	6.01
1941	NASDAQ	CHK	Thu, Nov 9, 2000	6.01	6.15	5.95	6.15
1940	NASDAQ	CHK	Wed, Nov 8, 2000	5.95	6.01	5.75	5.88
1939	NASDAQ	CHK	Tue, Nov 7, 2000	5.88	6.15	5.75	5.88
1938	NASDAQ	CHK	Mon, Nov 6, 2000	6.08	6.15	5.75	5.81
1937	NASDAQ	CHK	Fri, Nov 3, 2000	6.15	6.21	6.01	6.08
1936	NASDAQ	CHK	Thu, Nov 2, 2000	6.34	6.34	6.01	6.15
1935	NASDAQ	CHK	Wed, Nov 1, 2000	6.08	6.41	6.08	6.41
1934	NASDAQ	CHK	Tue, Oct 31, 2000	6.15	6.41	5.81	5.95
1933	NASDAQ	CHK	Mon, Oct 30, 2000	6.01	6.34	6.01	6.21
1932	NASDAQ	CHK	Fri, Oct 27, 2000	6.21	6.41	5.81	6.01
1931	NASDAQ	CHK	Thu, Oct 26, 2000	6.34	6.61	6.01	6.54
1930	NASDAQ	CHK	Wed, Oct 25, 2000	6.81	6.87	6.08	6.15
1929	NASDAQ	CHK	Tue, Oct 24, 2000	7.07	7.20	6.74	6.81
1928	NASDAQ	CHK	Mon, Oct 23, 2000	7.14	7.27	7.07	7.14
1927	NASDAQ	CHK	Fri, Oct 20, 2000	7.00	7.14	6.94	7.07
1926	NASDAQ	CHK	Thu, Oct 19, 2000	6.94	7.14	6.87	7.00
1925	NASDAQ	CHK	Wed, Oct 18, 2000	7.07	7.14	6.81	6.87
1924	NASDAQ	CHK	Tue, Oct 17, 2000	7.14	7.27	7.00	7.07
1923	NASDAQ	CHK	Mon, Oct 16, 2000	7.40	7.53	7.00	7.07
1922	NASDAQ	CHK	Fri, Oct 13, 2000	7.93	8.00	7.47	7.47
1921	NASDAQ	CHK	Thu, Oct 12, 2000	7.93	8.33	7.86	7.86
1920	NASDAQ	CHK	Wed, Oct 11, 2000	7.93	8.13	7.86	7.86
1919	NASDAQ	CHK	Tue, Oct 10, 2000	7.73	8.06	7.73	7.93
1918	NASDAQ	CHK	Mon, Oct 9, 2000	7.53	7.66	7.47	7.60
1917	NASDAQ	CHK	Fri, Oct 6, 2000	7.53	7.73	7.33	7.47
1916	NASDAQ	CHK	Thu, Oct 5, 2000	7.73	7.80	7.53	7.60
1915	NASDAQ	CHK	Wed, Oct 4, 2000	7.86	7.86	7.53	7.80
1914	NASDAQ	CHK	Tue, Oct 3, 2000	8.00	8.00	7.80	7.86
1913	NASDAQ	CHK	Mon, Oct 2, 2000	7.73	8.06	7.73	8.00
1912	NASDAQ	CHK	Fri, Sep 29, 2000	6.94	7.60	6.94	7.60
1911	NASDAQ	CHK	Thu, Sep 28, 2000	7.20	7.53	6.87	6.94
1910	NASDAQ	CHK	Wed, Sep 27, 2000	7.33	7.53	7.14	7.14
1909	NASDAQ	CHK	Tue, Sep 26, 2000	6.87	7.40	6.87	7.14
1908	NASDAQ	CHK	Mon, Sep 25, 2000	7.07	7.07	6.48	6.67
1907	NASDAQ	CHK	Fri, Sep 22, 2000	7.40	7.47	7.07	7.12
1906	NASDAQ	CHK	Thu, Sep 21, 2000	7.80	7.80	7.40	7.40
1905	NASDAQ	CHK	Wed, Sep 20, 2000	8.13	8.13	7.73	7.80
1904	NASDAQ	CHK	Tue, Sep 19, 2000	8.19	8.19	7.93	8.00
1903	NASDAQ	CHK	Mon, Sep 18, 2000	8.13	8.26	8.13	8.21
1902	NASDAQ	CHK	Fri, Sep 15, 2000	7.86	8.19	7.86	8.04
1901	NASDAQ	CHK	Thu, Sep 14, 2000	8.19	8.33	7.80	7.80
1900	NASDAQ	CHK	Wed, Sep 13, 2000	8.33	8.33	8.06	8.13
1899	NASDAQ	CHK	Tue, Sep 12, 2000	8.33	8.46	8.19	8.26
1898	NASDAQ	CHK	Mon, Sep 11, 2000	8.19	8.39	8.19	8.26
1897	NASDAQ	CHK	Fri, Sep 8, 2000	8.33	8.33	8.13	8.19
1896	NASDAQ	CHK	Thu, Sep 7, 2000	8.13	8.46	8.06	8.26
1895	NASDAQ	CHK	Wed, Sep 6, 2000	8.13	8.26	8.00	8.19
1894	NASDAQ	CHK	Tue, Sep 5, 2000	8.26	8.33	8.06	8.06
1893	NASDAQ	CHK	Fri, Sep 1, 2000	8.13	8.26	7.93	8.26
1892	NASDAQ	CHK	Thu, Aug 31, 2000	7.93	8.13	7.80	8.06
1891	NASDAQ	CHK	Wed, Aug 30, 2000	7.73	7.93	7.73	7.86
1890	NASDAQ	CHK	Tue, Aug 29, 2000	7.80	8.00	7.66	7.80
1889	NASDAQ	CHK	Mon, Aug 28, 2000	7.53	7.86	7.53	7.80
1888	NASDAQ	CHK	Fri, Aug 25, 2000	7.73	7.73	7.47	7.53
1887	NASDAQ	CHK	Thu, Aug 24, 2000	7.86	7.93	7.66	7.66
1886	NASDAQ	CHK	Wed, Aug 23, 2000	7.47	7.93	7.40	7.86
1885	NASDAQ	CHK	Tue, Aug 22, 2000	7.53	7.60	7.33	7.40
1884	NASDAQ	CHK	Mon, Aug 21, 2000	7.33	7.53	7.27	7.53
1883	NASDAQ	CHK	Fri, Aug 18, 2000	7.40	7.40	7.20	7.27
1882	NASDAQ	CHK	Thu, Aug 17, 2000	7.40	7.60	7.27	7.33
1881	NASDAQ	CHK	Wed, Aug 16, 2000	7.40	7.40	7.27	7.40
1880	NASDAQ	CHK	Tue, Aug 15, 2000	7.53	7.60	7.27	7.40
1879	NASDAQ	CHK	Mon, Aug 14, 2000	7.14	7.60	7.07	7.53
1878	NASDAQ	CHK	Fri, Aug 11, 2000	6.94	7.14	6.87	7.07
1877	NASDAQ	CHK	Thu, Aug 10, 2000	7.20	7.20	6.94	7.07
1876	NASDAQ	CHK	Wed, Aug 9, 2000	7.27	7.53	7.20	7.20
1875	NASDAQ	CHK	Tue, Aug 8, 2000	7.27	7.47	7.14	7.20
1874	NASDAQ	CHK	Mon, Aug 7, 2000	7.07	7.40	7.00	7.33
1873	NASDAQ	CHK	Fri, Aug 4, 2000	6.74	7.20	6.74	7.00
1872	NASDAQ	CHK	Thu, Aug 3, 2000	7.14	7.40	6.81	6.81
1871	NASDAQ	CHK	Wed, Aug 2, 2000	6.21	7.07	6.21	7.00
1870	NASDAQ	CHK	Tue, Aug 1, 2000	6.08	6.28	5.88	6.21
1869	NASDAQ	CHK	Mon, Jul 31, 2000	5.95	6.28	5.88	6.08
1868	NASDAQ	CHK	Fri, Jul 28, 2000	6.48	6.61	5.88	5.95
1867	NASDAQ	CHK	Thu, Jul 27, 2000	6.34	6.87	6.08	6.87
1866	NASDAQ	CHK	Wed, Jul 26, 2000	5.68	6.34	5.62	6.34
1865	NASDAQ	CHK	Tue, Jul 25, 2000	6.28	6.34	5.68	5.88
1864	NASDAQ	CHK	Mon, Jul 24, 2000	7.07	7.07	6.15	6.34
1863	NASDAQ	CHK	Fri, Jul 21, 2000	7.20	7.33	6.81	7.07
1862	NASDAQ	CHK	Thu, Jul 20, 2000	7.33	7.47	7.20	7.27
1861	NASDAQ	CHK	Wed, Jul 19, 2000	7.47	7.60	7.20	7.27
1860	NASDAQ	CHK	Tue, Jul 18, 2000	6.81	7.40	6.81	7.40
1859	NASDAQ	CHK	Mon, Jul 17, 2000	7.14	7.33	6.74	6.87
1858	NASDAQ	CHK	Fri, Jul 14, 2000	7.47	7.47	7.07	7.20
1857	NASDAQ	CHK	Thu, Jul 13, 2000	7.47	7.47	7.27	7.47
1856	NASDAQ	CHK	Wed, Jul 12, 2000	7.86	7.93	7.33	7.47
1855	NASDAQ	CHK	Tue, Jul 11, 2000	7.27	7.80	7.27	7.80
1854	NASDAQ	CHK	Mon, Jul 10, 2000	7.53	7.66	7.27	7.27
1853	NASDAQ	CHK	Fri, Jul 7, 2000	7.73	7.93	7.47	7.60
1852	NASDAQ	CHK	Thu, Jul 6, 2000	7.73	7.93	7.14	7.66
1851	NASDAQ	CHK	Wed, Jul 5, 2000	8.59	8.66	7.60	7.80
1850	NASDAQ	CHK	Mon, Jul 3, 2000	8.33	8.72	8.06	8.59
1849	NASDAQ	CHK	Fri, Jun 30, 2000	7.40	8.46	7.33	8.21
1848	NASDAQ	CHK	Thu, Jun 29, 2000	7.14	7.40	7.07	7.40
1847	NASDAQ	CHK	Wed, Jun 28, 2000	7.00	7.14	6.94	7.14
1846	NASDAQ	CHK	Tue, Jun 27, 2000	6.87	7.07	6.87	7.07
1845	NASDAQ	CHK	Mon, Jun 26, 2000	7.07	7.33	6.21	6.21
1844	NASDAQ	CHK	Fri, Jun 23, 2000	6.94	7.20	6.87	7.07
1843	NASDAQ	CHK	Thu, Jun 22, 2000	6.48	6.87	6.34	6.87
1842	NASDAQ	CHK	Wed, Jun 21, 2000	6.15	6.48	6.01	6.41
1841	NASDAQ	CHK	Tue, Jun 20, 2000	6.34	6.34	6.08	6.21
1840	NASDAQ	CHK	Mon, Jun 19, 2000	6.54	6.54	6.28	6.41
1839	NASDAQ	CHK	Fri, Jun 16, 2000	6.28	6.48	6.21	6.41
1838	NASDAQ	CHK	Thu, Jun 15, 2000	6.34	6.41	6.08	6.21
1837	NASDAQ	CHK	Wed, Jun 14, 2000	6.01	6.48	5.95	6.41
1836	NASDAQ	CHK	Tue, Jun 13, 2000	5.81	6.01	5.81	6.01
1835	NASDAQ	CHK	Mon, Jun 12, 2000	5.62	5.81	5.62	5.81
1834	NASDAQ	CHK	Fri, Jun 9, 2000	5.55	5.75	5.55	5.62
1833	NASDAQ	CHK	Thu, Jun 8, 2000	5.81	5.81	5.48	5.62
1832	NASDAQ	CHK	Wed, Jun 7, 2000	5.88	5.88	5.75	5.81
1831	NASDAQ	CHK	Tue, Jun 6, 2000	5.88	6.01	5.81	5.81
1830	NASDAQ	CHK	Mon, Jun 5, 2000	5.75	6.01	5.68	5.95
1829	NASDAQ	CHK	Fri, Jun 2, 2000	6.01	6.01	5.68	5.88
1828	NASDAQ	CHK	Thu, Jun 1, 2000	6.15	6.21	5.88	6.08
1827	NASDAQ	CHK	Wed, May 31, 2000	5.88	6.28	5.88	6.08
1826	NASDAQ	CHK	Tue, May 30, 2000	5.81	5.88	5.62	5.81
1825	NASDAQ	CHK	Fri, May 26, 2000	5.81	6.01	5.75	5.81
1824	NASDAQ	CHK	Thu, May 25, 2000	5.42	5.88	5.42	5.81
1823	NASDAQ	CHK	Wed, May 24, 2000	5.35	5.48	5.09	5.42
1822	NASDAQ	CHK	Tue, May 23, 2000	5.42	5.55	5.29	5.35
1821	NASDAQ	CHK	Mon, May 22, 2000	5.48	5.68	5.35	5.42
1820	NASDAQ	CHK	Fri, May 19, 2000	5.35	5.55	5.15	5.48
1819	NASDAQ	CHK	Thu, May 18, 2000	5.35	5.68	5.22	5.42
1818	NASDAQ	CHK	Wed, May 17, 2000	4.43	5.42	4.43	5.42
1817	NASDAQ	CHK	Tue, May 16, 2000	4.49	4.49	4.29	4.49
1816	NASDAQ	CHK	Mon, May 15, 2000	4.49	4.63	4.43	4.49
1815	NASDAQ	CHK	Fri, May 12, 2000	4.49	4.49	4.36	4.49
1814	NASDAQ	CHK	Thu, May 11, 2000	4.43	4.49	4.36	4.49
1813	NASDAQ	CHK	Wed, May 10, 2000	4.63	4.63	4.23	4.43
1812	NASDAQ	CHK	Tue, May 9, 2000	4.56	4.69	4.36	4.56
1811	NASDAQ	CHK	Mon, May 8, 2000	4.23	4.56	4.23	4.49
1810	NASDAQ	CHK	Fri, May 5, 2000	4.23	4.23	4.10	4.16
1809	NASDAQ	CHK	Thu, May 4, 2000	4.43	4.49	4.16	4.23
1808	NASDAQ	CHK	Wed, May 3, 2000	4.16	4.56	4.16	4.36
1807	NASDAQ	CHK	Tue, May 2, 2000	4.10	4.23	4.03	4.10
1806	NASDAQ	CHK	Mon, May 1, 2000	4.03	4.29	4.03	4.10
1805	NASDAQ	CHK	Fri, Apr 28, 2000	4.23	4.23	3.90	3.96
1804	NASDAQ	CHK	Thu, Apr 27, 2000	3.70	4.23	3.63	4.23
1803	NASDAQ	CHK	Wed, Apr 26, 2000	3.70	3.83	3.63	3.77
1802	NASDAQ	CHK	Tue, Apr 25, 2000	3.63	3.77	3.57	3.70
1801	NASDAQ	CHK	Mon, Apr 24, 2000	3.50	3.70	3.44	3.63
1800	NASDAQ	CHK	Thu, Apr 20, 2000	3.63	3.63	3.44	3.57
1799	NASDAQ	CHK	Wed, Apr 19, 2000	3.30	3.63	3.30	3.63
1798	NASDAQ	CHK	Tue, Apr 18, 2000	3.30	3.37	3.24	3.37
1797	NASDAQ	CHK	Mon, Apr 17, 2000	2.91	3.30	2.91	3.30
1796	NASDAQ	CHK	Fri, Apr 14, 2000	3.30	3.37	3.04	3.04
1795	NASDAQ	CHK	Thu, Apr 13, 2000	3.24	3.44	3.11	3.37
1794	NASDAQ	CHK	Wed, Apr 12, 2000	3.17	3.24	3.11	3.24
1793	NASDAQ	CHK	Tue, Apr 11, 2000	3.11	3.17	3.04	3.17
1792	NASDAQ	CHK	Mon, Apr 10, 2000	3.24	3.24	3.11	3.11
1791	NASDAQ	CHK	Fri, Apr 7, 2000	3.17	3.30	3.17	3.24
1790	NASDAQ	CHK	Thu, Apr 6, 2000	3.37	3.44	3.04	3.17
1789	NASDAQ	CHK	Wed, Apr 5, 2000	3.11	3.30	3.04	3.30
1788	NASDAQ	CHK	Tue, Apr 4, 2000	3.50	3.50	2.91	3.11
1787	NASDAQ	CHK	Mon, Apr 3, 2000	3.44	3.70	3.44	3.44
1786	NASDAQ	CHK	Fri, Mar 31, 2000	3.04	3.44	3.04	3.44
1785	NASDAQ	CHK	Thu, Mar 30, 2000	2.91	3.17	2.91	3.04
1784	NASDAQ	CHK	Wed, Mar 29, 2000	2.91	2.97	2.84	2.91
1783	NASDAQ	CHK	Tue, Mar 28, 2000	2.91	2.97	2.84	2.91
1782	NASDAQ	CHK	Mon, Mar 27, 2000	2.78	2.91	2.78	2.84
1781	NASDAQ	CHK	Fri, Mar 24, 2000	2.84	2.84	2.71	2.78
1780	NASDAQ	CHK	Thu, Mar 23, 2000	2.91	2.91	2.78	2.84
1779	NASDAQ	CHK	Wed, Mar 22, 2000	2.71	2.91	2.71	2.91
1778	NASDAQ	CHK	Tue, Mar 21, 2000	2.64	2.78	2.64	2.71
1777	NASDAQ	CHK	Mon, Mar 20, 2000	2.84	2.91	2.78	2.78
1776	NASDAQ	CHK	Fri, Mar 17, 2000	2.91	2.97	2.78	2.84
1775	NASDAQ	CHK	Thu, Mar 16, 2000	2.91	2.97	2.78	2.97
1774	NASDAQ	CHK	Wed, Mar 15, 2000	2.91	2.97	2.64	2.91
1773	NASDAQ	CHK	Tue, Mar 14, 2000	3.04	3.17	2.84	2.91
1772	NASDAQ	CHK	Mon, Mar 13, 2000	2.91	3.11	2.91	3.04
1771	NASDAQ	CHK	Fri, Mar 10, 2000	2.91	3.04	2.91	2.97
1770	NASDAQ	CHK	Thu, Mar 9, 2000	3.04	3.04	2.91	2.91
1769	NASDAQ	CHK	Wed, Mar 8, 2000	3.17	3.24	3.04	3.11
1768	NASDAQ	CHK	Tue, Mar 7, 2000	2.97	3.17	2.97	3.11
1767	NASDAQ	CHK	Mon, Mar 6, 2000	2.97	3.04	2.91	2.97
1766	NASDAQ	CHK	Fri, Mar 3, 2000	3.11	3.11	2.91	2.97
1765	NASDAQ	CHK	Thu, Mar 2, 2000	3.04	3.17	3.04	3.11
1764	NASDAQ	CHK	Wed, Mar 1, 2000	2.97	3.11	2.97	3.04
1763	NASDAQ	CHK	Tue, Feb 29, 2000	3.04	3.11	2.91	3.11
1762	NASDAQ	CHK	Mon, Feb 28, 2000	3.24	3.24	3.04	3.04
1761	NASDAQ	CHK	Fri, Feb 25, 2000	3.37	3.50	3.24	3.24
1760	NASDAQ	CHK	Thu, Feb 24, 2000	2.97	3.37	2.91	3.30
1759	NASDAQ	CHK	Wed, Feb 23, 2000	2.91	2.97	2.84	2.84
1758	NASDAQ	CHK	Tue, Feb 22, 2000	3.11	3.11	2.84	2.91
1757	NASDAQ	CHK	Fri, Feb 18, 2000	3.04	3.11	2.97	3.04
1756	NASDAQ	CHK	Thu, Feb 17, 2000	2.91	3.17	2.91	3.11
1755	NASDAQ	CHK	Wed, Feb 16, 2000	2.91	2.97	2.78	2.91
1754	NASDAQ	CHK	Tue, Feb 15, 2000	2.84	2.91	2.84	2.91
1753	NASDAQ	CHK	Mon, Feb 14, 2000	2.91	2.91	2.78	2.78
1752	NASDAQ	CHK	Fri, Feb 11, 2000	2.91	2.97	2.84	2.91
1751	NASDAQ	CHK	Thu, Feb 10, 2000	3.04	3.04	2.91	2.91
1750	NASDAQ	CHK	Wed, Feb 9, 2000	2.91	3.04	2.84	2.97
1749	NASDAQ	CHK	Tue, Feb 8, 2000	2.84	2.97	2.71	2.91
1748	NASDAQ	CHK	Mon, Feb 7, 2000	2.84	2.91	2.71	2.78
1747	NASDAQ	CHK	Fri, Feb 4, 2000	3.04	3.04	2.78	2.84
1746	NASDAQ	CHK	Thu, Feb 3, 2000	2.91	3.04	2.84	3.04
1745	NASDAQ	CHK	Wed, Feb 2, 2000	2.78	2.84	2.71	2.84
1744	NASDAQ	CHK	Tue, Feb 1, 2000	2.58	2.78	2.58	2.78
1743	NASDAQ	CHK	Mon, Jan 31, 2000	2.51	2.64	2.51	2.64
1742	NASDAQ	CHK	Fri, Jan 28, 2000	2.64	2.64	2.51	2.58
1741	NASDAQ	CHK	Thu, Jan 27, 2000	2.58	2.71	2.58	2.64
1740	NASDAQ	CHK	Wed, Jan 26, 2000	2.71	2.71	2.58	2.64
1739	NASDAQ	CHK	Tue, Jan 25, 2000	2.64	2.78	2.64	2.64
1738	NASDAQ	CHK	Mon, Jan 24, 2000	2.78	2.78	2.58	2.64
1737	NASDAQ	CHK	Fri, Jan 21, 2000	2.78	2.78	2.64	2.78
1736	NASDAQ	CHK	Thu, Jan 20, 2000	2.78	2.84	2.71	2.78
1735	NASDAQ	CHK	Wed, Jan 19, 2000	2.58	2.78	2.58	2.78
1734	NASDAQ	CHK	Tue, Jan 18, 2000	2.31	2.64	2.31	2.58
1733	NASDAQ	CHK	Fri, Jan 14, 2000	2.31	2.38	2.25	2.31
1732	NASDAQ	CHK	Thu, Jan 13, 2000	2.18	2.25	2.11	2.25
1731	NASDAQ	CHK	Wed, Jan 12, 2000	2.18	2.25	2.11	2.18
1730	NASDAQ	CHK	Tue, Jan 11, 2000	2.25	2.25	2.11	2.18
1729	NASDAQ	CHK	Mon, Jan 10, 2000	2.18	2.25	2.18	2.25
1728	NASDAQ	CHK	Fri, Jan 7, 2000	2.18	2.25	2.18	2.18
1727	NASDAQ	CHK	Thu, Jan 6, 2000	2.05	2.25	2.05	2.25
1726	NASDAQ	CHK	Wed, Jan 5, 2000	2.25	2.31	2.05	2.18
1725	NASDAQ	CHK	Tue, Jan 4, 2000	2.31	2.38	2.18	2.18
1724	NASDAQ	CHK	Mon, Jan 3, 2000	2.44	2.51	2.38	2.38
1723	NASDAQ	CHK	Fri, Dec 31, 1999	2.31	2.58	2.31	2.51
1722	NASDAQ	CHK	Thu, Dec 30, 1999	2.38	2.38	2.25	2.38
1721	NASDAQ	CHK	Wed, Dec 29, 1999	2.31	2.44	2.31	2.38
1720	NASDAQ	CHK	Tue, Dec 28, 1999	2.51	2.51	2.31	2.38
1719	NASDAQ	CHK	Mon, Dec 27, 1999	2.44	2.51	2.44	2.51
1718	NASDAQ	CHK	Thu, Dec 23, 1999	2.64	2.71	2.51	2.58
1717	NASDAQ	CHK	Wed, Dec 22, 1999	2.64	2.64	2.51	2.64
1716	NASDAQ	CHK	Tue, Dec 21, 1999	2.64	2.78	2.64	2.71
1715	NASDAQ	CHK	Mon, Dec 20, 1999	2.71	2.84	2.71	2.71
1714	NASDAQ	CHK	Fri, Dec 17, 1999	2.91	2.97	2.78	2.84
1713	NASDAQ	CHK	Thu, Dec 16, 1999	2.91	2.91	2.78	2.91
1712	NASDAQ	CHK	Wed, Dec 15, 1999	2.71	2.84	2.58	2.84
1711	NASDAQ	CHK	Tue, Dec 14, 1999	2.64	2.78	2.64	2.71
1710	NASDAQ	CHK	Mon, Dec 13, 1999	2.91	2.91	2.71	2.78
1709	NASDAQ	CHK	Fri, Dec 10, 1999	2.84	2.97	2.78	2.91
1708	NASDAQ	CHK	Thu, Dec 9, 1999	2.91	2.97	2.84	2.91
1707	NASDAQ	CHK	Wed, Dec 8, 1999	2.78	2.97	2.71	2.97
1706	NASDAQ	CHK	Tue, Dec 7, 1999	2.78	2.84	2.71	2.78
1705	NASDAQ	CHK	Mon, Dec 6, 1999	3.04	3.04	2.91	2.91
1704	NASDAQ	CHK	Fri, Dec 3, 1999	3.17	3.24	3.04	3.11
1703	NASDAQ	CHK	Thu, Dec 2, 1999	2.91	3.17	2.71	3.17
1702	NASDAQ	CHK	Wed, Dec 1, 1999	3.17	3.17	2.58	2.97
1701	NASDAQ	CHK	Tue, Nov 30, 1999	3.24	3.30	3.04	3.17
1700	NASDAQ	CHK	Mon, Nov 29, 1999	3.30	3.30	3.17	3.24
1699	NASDAQ	CHK	Fri, Nov 26, 1999	3.37	3.44	3.30	3.37
1698	NASDAQ	CHK	Wed, Nov 24, 1999	3.44	3.50	3.30	3.37
1697	NASDAQ	CHK	Tue, Nov 23, 1999	3.30	3.50	3.24	3.50
1696	NASDAQ	CHK	Mon, Nov 22, 1999	3.50	3.50	3.30	3.30
1695	NASDAQ	CHK	Fri, Nov 19, 1999	3.50	3.50	3.37	3.50
1694	NASDAQ	CHK	Thu, Nov 18, 1999	3.44	3.50	3.37	3.50
1693	NASDAQ	CHK	Wed, Nov 17, 1999	3.24	3.50	3.17	3.50
1692	NASDAQ	CHK	Tue, Nov 16, 1999	3.44	3.50	3.17	3.30
1691	NASDAQ	CHK	Mon, Nov 15, 1999	3.44	3.50	3.37	3.50
1690	NASDAQ	CHK	Fri, Nov 12, 1999	3.50	3.57	3.44	3.57
1689	NASDAQ	CHK	Thu, Nov 11, 1999	3.57	3.63	3.44	3.44
1688	NASDAQ	CHK	Wed, Nov 10, 1999	3.44	3.63	3.37	3.63
1687	NASDAQ	CHK	Tue, Nov 9, 1999	3.50	3.57	3.37	3.44
1686	NASDAQ	CHK	Mon, Nov 8, 1999	3.44	3.57	3.37	3.37
1685	NASDAQ	CHK	Fri, Nov 5, 1999	3.57	3.57	3.44	3.44
1684	NASDAQ	CHK	Thu, Nov 4, 1999	3.57	3.63	3.50	3.57
1683	NASDAQ	CHK	Wed, Nov 3, 1999	3.63	3.70	3.57	3.63
1682	NASDAQ	CHK	Tue, Nov 2, 1999	3.57	3.70	3.44	3.63
1681	NASDAQ	CHK	Mon, Nov 1, 1999	3.77	3.77	3.63	3.63
1680	NASDAQ	CHK	Fri, Oct 29, 1999	3.90	4.03	3.70	3.83
1679	NASDAQ	CHK	Thu, Oct 28, 1999	3.77	3.96	3.77	3.77
1678	NASDAQ	CHK	Wed, Oct 27, 1999	3.70	3.77	3.63	3.77
1677	NASDAQ	CHK	Tue, Oct 26, 1999	3.77	3.90	3.70	3.70
1676	NASDAQ	CHK	Mon, Oct 25, 1999	3.70	3.96	3.70	3.83
1675	NASDAQ	CHK	Fri, Oct 22, 1999	3.63	3.77	3.50	3.70
1674	NASDAQ	CHK	Thu, Oct 21, 1999	3.44	3.63	3.44	3.63
1673	NASDAQ	CHK	Wed, Oct 20, 1999	3.57	3.57	3.44	3.50
1672	NASDAQ	CHK	Tue, Oct 19, 1999	3.57	3.63	3.50	3.50
1671	NASDAQ	CHK	Mon, Oct 18, 1999	3.50	3.63	3.30	3.50
1670	NASDAQ	CHK	Fri, Oct 15, 1999	3.44	3.57	3.44	3.57
1669	NASDAQ	CHK	Thu, Oct 14, 1999	3.50	3.70	3.44	3.57
1668	NASDAQ	CHK	Wed, Oct 13, 1999	3.77	3.83	3.50	3.50
1667	NASDAQ	CHK	Tue, Oct 12, 1999	3.57	3.77	3.57	3.70
1666	NASDAQ	CHK	Mon, Oct 11, 1999	3.50	3.50	3.44	3.44
1665	NASDAQ	CHK	Fri, Oct 8, 1999	3.50	3.50	3.37	3.44
1664	NASDAQ	CHK	Thu, Oct 7, 1999	3.63	3.63	3.50	3.57
1663	NASDAQ	CHK	Wed, Oct 6, 1999	3.70	3.70	3.50	3.57
1662	NASDAQ	CHK	Tue, Oct 5, 1999	3.77	3.83	3.50	3.70
1661	NASDAQ	CHK	Mon, Oct 4, 1999	4.03	4.10	3.77	3.77
1660	NASDAQ	CHK	Fri, Oct 1, 1999	4.10	4.10	3.96	4.03
1659	NASDAQ	CHK	Thu, Sep 30, 1999	3.96	4.10	3.77	4.10
1658	NASDAQ	CHK	Wed, Sep 29, 1999	3.77	3.96	3.77	3.90
1657	NASDAQ	CHK	Tue, Sep 28, 1999	3.70	3.77	3.63	3.77
1656	NASDAQ	CHK	Mon, Sep 27, 1999	3.44	3.70	3.44	3.63
1655	NASDAQ	CHK	Fri, Sep 24, 1999	3.50	3.57	3.30	3.30
1654	NASDAQ	CHK	Thu, Sep 23, 1999	3.37	3.57	3.37	3.57
1653	NASDAQ	CHK	Wed, Sep 22, 1999	3.37	3.44	3.24	3.30
1652	NASDAQ	CHK	Tue, Sep 21, 1999	3.57	3.57	3.37	3.37
1651	NASDAQ	CHK	Mon, Sep 20, 1999	3.63	3.63	3.50	3.50
1650	NASDAQ	CHK	Fri, Sep 17, 1999	3.44	3.57	3.44	3.57
1649	NASDAQ	CHK	Thu, Sep 16, 1999	3.57	3.57	3.44	3.44
1648	NASDAQ	CHK	Wed, Sep 15, 1999	3.63	3.63	3.44	3.57
1647	NASDAQ	CHK	Tue, Sep 14, 1999	3.63	3.63	3.50	3.57
1646	NASDAQ	CHK	Mon, Sep 13, 1999	3.70	3.70	3.63	3.63
1645	NASDAQ	CHK	Fri, Sep 10, 1999	3.77	3.83	3.57	3.70
1644	NASDAQ	CHK	Thu, Sep 9, 1999	3.77	3.90	3.70	3.77
1643	NASDAQ	CHK	Wed, Sep 8, 1999	3.57	3.77	3.50	3.70
1642	NASDAQ	CHK	Tue, Sep 7, 1999	3.44	3.63	3.37	3.57
1641	NASDAQ	CHK	Fri, Sep 3, 1999	3.37	3.44	3.30	3.44
1640	NASDAQ	CHK	Thu, Sep 2, 1999	3.37	3.44	3.30	3.37
1639	NASDAQ	CHK	Wed, Sep 1, 1999	3.37	3.50	3.37	3.44
1638	NASDAQ	CHK	Tue, Aug 31, 1999	3.44	3.50	3.37	3.44
1637	NASDAQ	CHK	Mon, Aug 30, 1999	3.44	3.44	3.30	3.44
1636	NASDAQ	CHK	Fri, Aug 27, 1999	3.30	3.44	3.30	3.44
1635	NASDAQ	CHK	Thu, Aug 26, 1999	3.70	3.70	3.17	3.30
1634	NASDAQ	CHK	Wed, Aug 25, 1999	3.83	3.90	3.63	3.70
1633	NASDAQ	CHK	Tue, Aug 24, 1999	3.96	4.03	3.77	3.83
1632	NASDAQ	CHK	Mon, Aug 23, 1999	3.70	4.03	3.70	3.96
1631	NASDAQ	CHK	Fri, Aug 20, 1999	3.83	3.83	3.63	3.70
1630	NASDAQ	CHK	Thu, Aug 19, 1999	3.77	3.90	3.70	3.83
1629	NASDAQ	CHK	Wed, Aug 18, 1999	3.96	3.96	3.70	3.83
1628	NASDAQ	CHK	Tue, Aug 17, 1999	4.03	4.10	3.90	3.96
1627	NASDAQ	CHK	Mon, Aug 16, 1999	3.96	4.03	3.90	3.96
1626	NASDAQ	CHK	Fri, Aug 13, 1999	3.83	4.03	3.83	3.90
1625	NASDAQ	CHK	Thu, Aug 12, 1999	3.83	3.96	3.83	3.83
1624	NASDAQ	CHK	Wed, Aug 11, 1999	3.90	3.96	3.83	3.90
1623	NASDAQ	CHK	Tue, Aug 10, 1999	4.03	4.10	3.70	3.83
1622	NASDAQ	CHK	Mon, Aug 9, 1999	3.77	3.96	3.77	3.96
1621	NASDAQ	CHK	Fri, Aug 6, 1999	3.70	3.83	3.70	3.77
1620	NASDAQ	CHK	Thu, Aug 5, 1999	3.83	3.96	3.70	3.77
1619	NASDAQ	CHK	Wed, Aug 4, 1999	3.44	3.90	3.44	3.77
1618	NASDAQ	CHK	Tue, Aug 3, 1999	3.63	3.70	3.37	3.44
1617	NASDAQ	CHK	Mon, Aug 2, 1999	3.90	4.10	3.63	3.70
1616	NASDAQ	CHK	Fri, Jul 30, 1999	4.16	4.36	3.83	4.03
1615	NASDAQ	CHK	Thu, Jul 29, 1999	3.83	4.23	3.83	4.16
1614	NASDAQ	CHK	Wed, Jul 28, 1999	3.50	3.63	3.50	3.63
1613	NASDAQ	CHK	Tue, Jul 27, 1999	3.63	3.70	3.44	3.57
1612	NASDAQ	CHK	Mon, Jul 26, 1999	3.37	3.50	3.24	3.50
1611	NASDAQ	CHK	Fri, Jul 23, 1999	2.97	3.37	2.91	3.37
1610	NASDAQ	CHK	Thu, Jul 22, 1999	3.04	3.04	2.91	3.04
1609	NASDAQ	CHK	Wed, Jul 21, 1999	2.97	3.04	2.97	3.04
1608	NASDAQ	CHK	Tue, Jul 20, 1999	3.24	3.24	2.91	3.04
1607	NASDAQ	CHK	Mon, Jul 19, 1999	3.37	3.44	3.30	3.30
1606	NASDAQ	CHK	Fri, Jul 16, 1999	3.37	3.44	3.30	3.37
1605	NASDAQ	CHK	Thu, Jul 15, 1999	3.30	3.44	3.30	3.44
1604	NASDAQ	CHK	Wed, Jul 14, 1999	3.70	3.70	3.24	3.37
1603	NASDAQ	CHK	Tue, Jul 13, 1999	3.83	3.83	3.70	3.70
1602	NASDAQ	CHK	Mon, Jul 12, 1999	3.83	3.83	3.77	3.83
1601	NASDAQ	CHK	Fri, Jul 9, 1999	3.77	3.90	3.70	3.83
1600	NASDAQ	CHK	Thu, Jul 8, 1999	3.50	3.77	3.44	3.70
1599	NASDAQ	CHK	Wed, Jul 7, 1999	3.30	3.50	3.30	3.50
1598	NASDAQ	CHK	Tue, Jul 6, 1999	3.44	3.57	3.24	3.24
1597	NASDAQ	CHK	Fri, Jul 2, 1999	3.24	3.37	3.24	3.37
1596	NASDAQ	CHK	Thu, Jul 1, 1999	3.11	3.37	3.04	3.17
1595	NASDAQ	CHK	Wed, Jun 30, 1999	2.84	3.11	2.78	3.11
1594	NASDAQ	CHK	Tue, Jun 29, 1999	2.64	2.91	2.58	2.84
1593	NASDAQ	CHK	Mon, Jun 28, 1999	2.71	2.78	2.64	2.64
1592	NASDAQ	CHK	Fri, Jun 25, 1999	2.58	2.84	2.58	2.71
1591	NASDAQ	CHK	Thu, Jun 24, 1999	2.38	2.58	2.38	2.58
1590	NASDAQ	CHK	Wed, Jun 23, 1999	2.18	2.51	2.18	2.38
1589	NASDAQ	CHK	Tue, Jun 22, 1999	2.25	2.25	2.11	2.18
1588	NASDAQ	CHK	Mon, Jun 21, 1999	2.31	2.31	2.25	2.25
1587	NASDAQ	CHK	Fri, Jun 18, 1999	2.38	2.38	2.31	2.38
1586	NASDAQ	CHK	Thu, Jun 17, 1999	2.31	2.38	2.31	2.38
1585	NASDAQ	CHK	Wed, Jun 16, 1999	2.31	2.44	2.31	2.31
1584	NASDAQ	CHK	Tue, Jun 15, 1999	2.31	2.31	2.18	2.31
1583	NASDAQ	CHK	Mon, Jun 14, 1999	2.25	2.31	2.25	2.31
1582	NASDAQ	CHK	Fri, Jun 11, 1999	2.31	2.31	2.18	2.25
1581	NASDAQ	CHK	Thu, Jun 10, 1999	2.31	2.38	2.25	2.31
1580	NASDAQ	CHK	Wed, Jun 9, 1999	2.38	2.38	2.31	2.38
1579	NASDAQ	CHK	Tue, Jun 8, 1999	2.38	2.44	2.38	2.38
1578	NASDAQ	CHK	Mon, Jun 7, 1999	2.31	2.44	2.31	2.44
1577	NASDAQ	CHK	Fri, Jun 4, 1999	2.38	2.38	2.25	2.38
1576	NASDAQ	CHK	Thu, Jun 3, 1999	2.31	2.38	2.25	2.38
1575	NASDAQ	CHK	Wed, Jun 2, 1999	2.31	2.31	2.25	2.31
1574	NASDAQ	CHK	Tue, Jun 1, 1999	2.18	2.31	2.18	2.31
1573	NASDAQ	CHK	Fri, May 28, 1999	2.25	2.31	2.18	2.25
1572	NASDAQ	CHK	Thu, May 27, 1999	2.11	2.31	2.05	2.25
1571	NASDAQ	CHK	Wed, May 26, 1999	2.25	2.31	2.05	2.11
1570	NASDAQ	CHK	Tue, May 25, 1999	2.31	2.38	2.18	2.25
1569	NASDAQ	CHK	Mon, May 24, 1999	2.31	2.31	2.25	2.31
1568	NASDAQ	CHK	Fri, May 21, 1999	2.38	2.38	2.25	2.31
1567	NASDAQ	CHK	Thu, May 20, 1999	2.18	2.44	2.11	2.38
1566	NASDAQ	CHK	Wed, May 19, 1999	1.98	2.18	1.85	2.11
1565	NASDAQ	CHK	Tue, May 18, 1999	1.98	1.98	1.92	1.98
1564	NASDAQ	CHK	Mon, May 17, 1999	1.92	1.98	1.85	1.98
1563	NASDAQ	CHK	Fri, May 14, 1999	1.92	1.98	1.78	1.98
1562	NASDAQ	CHK	Thu, May 13, 1999	1.78	1.98	1.78	1.92
1561	NASDAQ	CHK	Wed, May 12, 1999	1.85	1.85	1.72	1.78
1560	NASDAQ	CHK	Tue, May 11, 1999	1.98	1.98	1.85	1.92
1559	NASDAQ	CHK	Mon, May 10, 1999	2.11	2.11	1.98	2.05
1558	NASDAQ	CHK	Fri, May 7, 1999	2.18	2.18	1.98	2.11
1557	NASDAQ	CHK	Thu, May 6, 1999	2.31	2.38	2.18	2.25
1556	NASDAQ	CHK	Wed, May 5, 1999	2.38	2.44	1.98	2.31
1555	NASDAQ	CHK	Tue, May 4, 1999	2.51	2.58	2.44	2.44
1554	NASDAQ	CHK	Mon, May 3, 1999	2.51	2.58	2.44	2.44
1553	NASDAQ	CHK	Fri, Apr 30, 1999	2.44	2.58	2.38	2.44
1552	NASDAQ	CHK	Thu, Apr 29, 1999	2.25	2.58	2.18	2.38
1551	NASDAQ	CHK	Wed, Apr 28, 1999	2.11	2.25	2.05	2.18
1550	NASDAQ	CHK	Tue, Apr 27, 1999	1.85	2.11	1.85	2.11
1549	NASDAQ	CHK	Mon, Apr 26, 1999	1.92	1.92	1.85	1.85
1548	NASDAQ	CHK	Fri, Apr 23, 1999	1.85	1.92	1.78	1.85
1547	NASDAQ	CHK	Thu, Apr 22, 1999	1.85	1.92	1.72	1.85
1546	NASDAQ	CHK	Wed, Apr 21, 1999	1.78	1.85	1.78	1.85
1545	NASDAQ	CHK	Tue, Apr 20, 1999	1.98	1.98	1.72	1.78
1544	NASDAQ	CHK	Mon, Apr 19, 1999	2.11	2.11	1.85	1.98
1543	NASDAQ	CHK	Fri, Apr 16, 1999	1.59	2.05	1.59	2.05
1542	NASDAQ	CHK	Thu, Apr 15, 1999	1.52	1.59	1.52	1.59
1541	NASDAQ	CHK	Wed, Apr 14, 1999	1.52	1.59	1.39	1.59
1540	NASDAQ	CHK	Tue, Apr 13, 1999	1.45	1.52	1.45	1.52
1539	NASDAQ	CHK	Mon, Apr 12, 1999	1.52	1.52	1.45	1.45
1538	NASDAQ	CHK	Fri, Apr 9, 1999	1.45	1.52	1.45	1.52
1537	NASDAQ	CHK	Thu, Apr 8, 1999	1.45	1.52	1.45	1.52
1536	NASDAQ	CHK	Wed, Apr 7, 1999	1.45	1.52	1.45	1.45
1535	NASDAQ	CHK	Tue, Apr 6, 1999	1.45	1.52	1.39	1.45
1534	NASDAQ	CHK	Mon, Apr 5, 1999	1.52	1.52	1.45	1.52
1533	NASDAQ	CHK	Thu, Apr 1, 1999	1.52	1.52	1.45	1.45
1532	NASDAQ	CHK	Wed, Mar 31, 1999	1.52	1.52	1.45	1.45
1531	NASDAQ	CHK	Tue, Mar 30, 1999	1.52	1.59	1.45	1.45
1530	NASDAQ	CHK	Mon, Mar 29, 1999	1.52	1.52	1.45	1.45
1529	NASDAQ	CHK	Fri, Mar 26, 1999	1.45	1.52	1.45	1.52
1528	NASDAQ	CHK	Thu, Mar 25, 1999	1.39	1.52	1.39	1.45
1527	NASDAQ	CHK	Wed, Mar 24, 1999	1.45	1.52	1.39	1.39
1526	NASDAQ	CHK	Tue, Mar 23, 1999	1.52	1.52	1.39	1.45
1525	NASDAQ	CHK	Mon, Mar 22, 1999	1.39	1.52	1.39	1.52
1524	NASDAQ	CHK	Fri, Mar 19, 1999	1.19	1.39	1.19	1.39
1523	NASDAQ	CHK	Thu, Mar 18, 1999	1.19	1.32	1.19	1.19
1522	NASDAQ	CHK	Wed, Mar 17, 1999	1.26	1.26	1.19	1.19
1521	NASDAQ	CHK	Tue, Mar 16, 1999	1.32	1.32	1.26	1.32
1520	NASDAQ	CHK	Mon, Mar 15, 1999	1.32	1.32	1.26	1.32
1519	NASDAQ	CHK	Fri, Mar 12, 1999	1.32	1.32	1.26	1.32
1518	NASDAQ	CHK	Thu, Mar 11, 1999	1.26	1.39	1.26	1.32
1517	NASDAQ	CHK	Wed, Mar 10, 1999	1.19	1.26	1.12	1.26
1516	NASDAQ	CHK	Tue, Mar 9, 1999	1.26	1.26	1.12	1.12
1515	NASDAQ	CHK	Mon, Mar 8, 1999	1.06	1.26	1.06	1.26
1514	NASDAQ	CHK	Fri, Mar 5, 1999	0.93	0.99	0.86	0.99
1513	NASDAQ	CHK	Thu, Mar 4, 1999	0.86	0.93	0.79	0.93
1512	NASDAQ	CHK	Wed, Mar 3, 1999	0.79	0.86	0.73	0.86
1511	NASDAQ	CHK	Tue, Mar 2, 1999	0.79	0.86	0.73	0.79
1510	NASDAQ	CHK	Mon, Mar 1, 1999	0.73	0.79	0.73	0.79
1509	NASDAQ	CHK	Fri, Feb 26, 1999	0.79	0.79	0.73	0.79
1508	NASDAQ	CHK	Thu, Feb 25, 1999	0.73	0.79	0.73	0.79
1507	NASDAQ	CHK	Wed, Feb 24, 1999	0.79	0.79	0.73	0.79
1506	NASDAQ	CHK	Tue, Feb 23, 1999	0.79	0.79	0.73	0.79
1505	NASDAQ	CHK	Mon, Feb 22, 1999	0.79	0.79	0.66	0.79
1504	NASDAQ	CHK	Fri, Feb 19, 1999	0.86	0.86	0.73	0.79
1503	NASDAQ	CHK	Thu, Feb 18, 1999	0.79	0.86	0.79	0.86
1502	NASDAQ	CHK	Wed, Feb 17, 1999	0.86	0.86	0.79	0.79
1501	NASDAQ	CHK	Tue, Feb 16, 1999	0.86	0.86	0.79	0.86
1500	NASDAQ	CHK	Fri, Feb 12, 1999	0.86	0.86	0.79	0.79
1499	NASDAQ	CHK	Thu, Feb 11, 1999	0.86	0.93	0.79	0.86
1498	NASDAQ	CHK	Wed, Feb 10, 1999	0.86	0.93	0.79	0.86
1497	NASDAQ	CHK	Tue, Feb 9, 1999	0.79	0.93	0.79	0.79
1496	NASDAQ	CHK	Mon, Feb 8, 1999	0.86	0.86	0.79	0.79
1495	NASDAQ	CHK	Fri, Feb 5, 1999	0.86	0.86	0.79	0.79
1494	NASDAQ	CHK	Thu, Feb 4, 1999	0.93	0.93	0.79	0.86
1493	NASDAQ	CHK	Wed, Feb 3, 1999	0.93	0.93	0.86	0.93
1492	NASDAQ	CHK	Tue, Feb 2, 1999	0.93	0.99	0.86	0.93
1491	NASDAQ	CHK	Mon, Feb 1, 1999	0.93	0.99	0.86	0.86
1490	NASDAQ	CHK	Fri, Jan 29, 1999	0.99	0.99	0.86	0.86
1489	NASDAQ	CHK	Thu, Jan 28, 1999	1.06	1.06	0.93	0.99
1488	NASDAQ	CHK	Wed, Jan 27, 1999	1.06	1.12	0.93	1.06
1487	NASDAQ	CHK	Tue, Jan 26, 1999	1.12	1.12	1.06	1.06
1486	NASDAQ	CHK	Mon, Jan 25, 1999	1.12	1.12	1.06	1.06
1485	NASDAQ	CHK	Fri, Jan 22, 1999	1.06	1.12	1.06	1.12
1484	NASDAQ	CHK	Thu, Jan 21, 1999	1.06	1.12	1.06	1.06
1483	NASDAQ	CHK	Wed, Jan 20, 1999	1.12	1.19	1.06	1.06
1482	NASDAQ	CHK	Tue, Jan 19, 1999	1.12	1.19	1.06	1.19
1481	NASDAQ	CHK	Fri, Jan 15, 1999	1.12	1.19	1.06	1.12
1480	NASDAQ	CHK	Thu, Jan 14, 1999	1.19	1.26	1.12	1.19
1479	NASDAQ	CHK	Wed, Jan 13, 1999	1.19	1.26	1.12	1.19
1478	NASDAQ	CHK	Tue, Jan 12, 1999	1.26	1.26	1.12	1.19
1477	NASDAQ	CHK	Mon, Jan 11, 1999	1.19	1.26	1.12	1.26
1476	NASDAQ	CHK	Fri, Jan 8, 1999	1.12	1.19	1.12	1.19
1475	NASDAQ	CHK	Thu, Jan 7, 1999	1.06	1.26	1.06	1.12
1474	NASDAQ	CHK	Wed, Jan 6, 1999	1.06	1.26	0.93	1.26
1473	NASDAQ	CHK	Tue, Jan 5, 1999	1.06	1.06	0.93	1.06
1472	NASDAQ	CHK	Mon, Jan 4, 1999	0.93	1.06	0.93	1.06
1471	NASDAQ	CHK	Thu, Dec 31, 1998	0.79	0.99	0.79	0.99
1470	NASDAQ	CHK	Wed, Dec 30, 1998	0.79	0.99	0.79	0.79
1469	NASDAQ	CHK	Tue, Dec 29, 1998	0.99	1.06	0.79	0.79
1468	NASDAQ	CHK	Mon, Dec 28, 1998	1.06	1.12	0.99	0.99
1467	NASDAQ	CHK	Thu, Dec 24, 1998	1.12	1.12	1.06	1.06
1466	NASDAQ	CHK	Wed, Dec 23, 1998	1.06	1.19	1.06	1.06
1465	NASDAQ	CHK	Tue, Dec 22, 1998	1.12	1.12	0.99	1.12
1464	NASDAQ	CHK	Mon, Dec 21, 1998	1.12	1.19	1.06	1.06
1463	NASDAQ	CHK	Fri, Dec 18, 1998	1.12	1.19	1.06	1.12
1462	NASDAQ	CHK	Thu, Dec 17, 1998	1.32	1.32	1.12	1.19
1461	NASDAQ	CHK	Wed, Dec 16, 1998	1.32	1.39	1.19	1.26
1460	NASDAQ	CHK	Tue, Dec 15, 1998	1.26	1.32	1.26	1.26
1459	NASDAQ	CHK	Mon, Dec 14, 1998	1.26	1.39	1.26	1.26
1458	NASDAQ	CHK	Fri, Dec 11, 1998	1.32	1.39	1.26	1.32
1457	NASDAQ	CHK	Thu, Dec 10, 1998	1.32	1.39	1.26	1.32
1456	NASDAQ	CHK	Wed, Dec 9, 1998	1.32	1.39	1.32	1.39
1455	NASDAQ	CHK	Tue, Dec 8, 1998	1.39	1.45	1.32	1.32
1454	NASDAQ	CHK	Mon, Dec 7, 1998	1.39	1.45	1.32	1.45
1453	NASDAQ	CHK	Fri, Dec 4, 1998	1.32	1.39	1.32	1.39
1452	NASDAQ	CHK	Thu, Dec 3, 1998	1.39	1.45	1.26	1.26
1451	NASDAQ	CHK	Wed, Dec 2, 1998	1.32	1.39	1.26	1.32
1450	NASDAQ	CHK	Tue, Dec 1, 1998	1.39	1.45	1.26	1.32
1449	NASDAQ	CHK	Mon, Nov 30, 1998	1.72	1.72	1.39	1.52
1448	NASDAQ	CHK	Fri, Nov 27, 1998	1.65	1.65	1.59	1.65
1447	NASDAQ	CHK	Wed, Nov 25, 1998	1.39	1.59	1.32	1.59
1446	NASDAQ	CHK	Tue, Nov 24, 1998	1.39	1.45	1.32	1.32
1445	NASDAQ	CHK	Mon, Nov 23, 1998	1.39	1.45	1.32	1.39
1444	NASDAQ	CHK	Fri, Nov 20, 1998	1.65	1.65	1.32	1.45
1443	NASDAQ	CHK	Thu, Nov 19, 1998	1.72	1.85	1.65	1.72
1442	NASDAQ	CHK	Wed, Nov 18, 1998	1.85	1.85	1.65	1.65
1441	NASDAQ	CHK	Tue, Nov 17, 1998	1.92	1.98	1.65	1.92
1440	NASDAQ	CHK	Mon, Nov 16, 1998	2.11	2.18	1.78	1.92
1439	NASDAQ	CHK	Fri, Nov 13, 1998	2.25	2.25	2.11	2.18
1438	NASDAQ	CHK	Thu, Nov 12, 1998	2.31	2.31	2.18	2.25
1437	NASDAQ	CHK	Wed, Nov 11, 1998	2.44	2.44	2.18	2.25
1436	NASDAQ	CHK	Tue, Nov 10, 1998	2.51	2.58	2.38	2.38
1435	NASDAQ	CHK	Mon, Nov 9, 1998	2.38	2.51	2.31	2.51
1434	NASDAQ	CHK	Fri, Nov 6, 1998	2.31	2.38	2.25	2.38
1433	NASDAQ	CHK	Thu, Nov 5, 1998	2.58	2.64	2.25	2.38
1432	NASDAQ	CHK	Wed, Nov 4, 1998	2.71	2.78	2.51	2.64
1431	NASDAQ	CHK	Tue, Nov 3, 1998	2.51	2.78	2.44	2.71
1430	NASDAQ	CHK	Mon, Nov 2, 1998	2.11	2.58	2.11	2.51
1429	NASDAQ	CHK	Fri, Oct 30, 1998	1.98	2.05	1.98	2.05
1428	NASDAQ	CHK	Thu, Oct 29, 1998	1.98	2.05	1.92	1.98
1427	NASDAQ	CHK	Wed, Oct 28, 1998	1.98	2.05	1.85	1.98
1426	NASDAQ	CHK	Tue, Oct 27, 1998	1.85	1.98	1.78	1.92
1425	NASDAQ	CHK	Mon, Oct 26, 1998	1.59	1.78	1.52	1.78
1424	NASDAQ	CHK	Fri, Oct 23, 1998	1.59	1.65	1.52	1.52
1423	NASDAQ	CHK	Thu, Oct 22, 1998	1.52	1.65	1.45	1.52
1422	NASDAQ	CHK	Wed, Oct 21, 1998	1.45	1.52	1.39	1.45
1421	NASDAQ	CHK	Tue, Oct 20, 1998	1.39	1.59	1.39	1.45
1420	NASDAQ	CHK	Mon, Oct 19, 1998	1.26	1.39	1.26	1.39
1419	NASDAQ	CHK	Fri, Oct 16, 1998	1.32	1.45	1.19	1.19
1418	NASDAQ	CHK	Thu, Oct 15, 1998	1.39	1.52	1.39	1.39
1417	NASDAQ	CHK	Wed, Oct 14, 1998	1.45	1.45	1.39	1.39
1416	NASDAQ	CHK	Tue, Oct 13, 1998	1.45	1.45	1.32	1.45
1415	NASDAQ	CHK	Mon, Oct 12, 1998	1.52	1.59	1.45	1.45
1414	NASDAQ	CHK	Fri, Oct 9, 1998	1.45	1.52	1.32	1.45
1413	NASDAQ	CHK	Thu, Oct 8, 1998	1.39	1.45	1.32	1.39
1412	NASDAQ	CHK	Wed, Oct 7, 1998	1.52	1.52	1.39	1.39
1411	NASDAQ	CHK	Tue, Oct 6, 1998	1.52	1.52	1.39	1.45
1410	NASDAQ	CHK	Mon, Oct 5, 1998	1.32	1.52	1.26	1.45
1409	NASDAQ	CHK	Fri, Oct 2, 1998	1.26	1.26	0.99	1.26
1408	NASDAQ	CHK	Thu, Oct 1, 1998	1.32	1.39	1.12	1.19
1407	NASDAQ	CHK	Wed, Sep 30, 1998	1.45	1.45	1.19	1.26
1406	NASDAQ	CHK	Tue, Sep 29, 1998	1.39	1.52	1.39	1.39
1405	NASDAQ	CHK	Mon, Sep 28, 1998	1.45	1.52	1.39	1.39
1404	NASDAQ	CHK	Fri, Sep 25, 1998	1.45	1.65	1.45	1.45
1403	NASDAQ	CHK	Thu, Sep 24, 1998	1.65	1.65	1.45	1.52
1402	NASDAQ	CHK	Wed, Sep 23, 1998	1.72	1.85	1.59	1.72
1401	NASDAQ	CHK	Tue, Sep 22, 1998	1.72	1.78	1.65	1.65
1400	NASDAQ	CHK	Mon, Sep 21, 1998	1.78	1.85	1.72	1.78
1399	NASDAQ	CHK	Fri, Sep 18, 1998	1.85	1.92	1.78	1.85
1398	NASDAQ	CHK	Thu, Sep 17, 1998	1.92	1.98	1.78	1.85
1397	NASDAQ	CHK	Wed, Sep 16, 1998	2.05	2.05	1.92	1.98
1396	NASDAQ	CHK	Tue, Sep 15, 1998	1.92	2.05	1.85	2.05
1395	NASDAQ	CHK	Mon, Sep 14, 1998	1.92	2.05	1.85	1.85
1394	NASDAQ	CHK	Fri, Sep 11, 1998	1.98	1.98	1.78	1.92
1393	NASDAQ	CHK	Thu, Sep 10, 1998	1.78	2.11	1.72	1.92
1392	NASDAQ	CHK	Wed, Sep 9, 1998	1.92	1.92	1.78	1.85
1391	NASDAQ	CHK	Tue, Sep 8, 1998	1.85	1.98	1.78	1.92
1390	NASDAQ	CHK	Fri, Sep 4, 1998	1.65	1.72	1.52	1.72
1389	NASDAQ	CHK	Thu, Sep 3, 1998	1.72	1.85	1.65	1.65
1388	NASDAQ	CHK	Wed, Sep 2, 1998	1.85	1.85	1.65	1.65
1387	NASDAQ	CHK	Tue, Sep 1, 1998	1.65	1.85	1.52	1.85
1386	NASDAQ	CHK	Mon, Aug 31, 1998	2.05	2.11	1.59	1.65
1385	NASDAQ	CHK	Fri, Aug 28, 1998	2.18	2.18	1.85	1.98
1384	NASDAQ	CHK	Thu, Aug 27, 1998	2.25	2.25	1.92	2.18
1383	NASDAQ	CHK	Wed, Aug 26, 1998	2.38	2.38	2.25	2.31
1382	NASDAQ	CHK	Tue, Aug 25, 1998	2.51	2.51	2.38	2.38
1381	NASDAQ	CHK	Mon, Aug 24, 1998	2.64	2.64	2.31	2.51
1380	NASDAQ	CHK	Fri, Aug 21, 1998	2.71	2.78	2.58	2.64
1379	NASDAQ	CHK	Thu, Aug 20, 1998	3.11	3.11	2.78	2.78
1378	NASDAQ	CHK	Wed, Aug 19, 1998	3.11	3.24	3.04	3.04
1377	NASDAQ	CHK	Tue, Aug 18, 1998	3.24	3.24	3.04	3.11
1376	NASDAQ	CHK	Mon, Aug 17, 1998	2.84	3.37	2.84	3.11
1375	NASDAQ	CHK	Fri, Aug 14, 1998	2.38	2.84	2.38	2.84
1374	NASDAQ	CHK	Thu, Aug 13, 1998	2.38	2.38	2.18	2.31
1373	NASDAQ	CHK	Wed, Aug 12, 1998	2.38	2.38	2.18	2.31
1372	NASDAQ	CHK	Tue, Aug 11, 1998	2.44	2.44	2.31	2.38
1371	NASDAQ	CHK	Mon, Aug 10, 1998	2.78	2.78	2.44	2.44
1370	NASDAQ	CHK	Fri, Aug 7, 1998	2.78	2.91	2.58	2.71
1369	NASDAQ	CHK	Thu, Aug 6, 1998	2.51	2.78	2.38	2.78
1368	NASDAQ	CHK	Wed, Aug 5, 1998	2.71	2.71	2.44	2.51
1367	NASDAQ	CHK	Tue, Aug 4, 1998	2.78	2.78	2.58	2.71
1366	NASDAQ	CHK	Mon, Aug 3, 1998	2.78	2.84	2.71	2.78
1365	NASDAQ	CHK	Fri, Jul 31, 1998	2.78	2.84	2.71	2.71
1364	NASDAQ	CHK	Thu, Jul 30, 1998	2.78	2.84	2.78	2.78
1363	NASDAQ	CHK	Wed, Jul 29, 1998	2.84	2.84	2.78	2.78
1362	NASDAQ	CHK	Tue, Jul 28, 1998	2.91	2.91	2.71	2.84
1361	NASDAQ	CHK	Mon, Jul 27, 1998	2.91	2.91	2.78	2.91
1360	NASDAQ	CHK	Fri, Jul 24, 1998	2.97	2.97	2.78	2.84
1359	NASDAQ	CHK	Thu, Jul 23, 1998	2.91	3.04	2.84	2.97
1358	NASDAQ	CHK	Wed, Jul 22, 1998	2.97	3.04	2.97	2.97
1357	NASDAQ	CHK	Tue, Jul 21, 1998	3.04	3.11	2.97	2.97
1356	NASDAQ	CHK	Mon, Jul 20, 1998	3.11	3.11	2.97	2.97
1355	NASDAQ	CHK	Fri, Jul 17, 1998	3.04	3.11	2.97	3.04
1354	NASDAQ	CHK	Thu, Jul 16, 1998	3.17	3.30	3.04	3.11
1353	NASDAQ	CHK	Wed, Jul 15, 1998	3.04	3.17	3.04	3.17
1352	NASDAQ	CHK	Tue, Jul 14, 1998	3.11	3.17	3.11	3.11
1351	NASDAQ	CHK	Mon, Jul 13, 1998	3.24	3.24	3.11	3.11
1350	NASDAQ	CHK	Fri, Jul 10, 1998	3.17	3.24	3.11	3.17
1349	NASDAQ	CHK	Thu, Jul 9, 1998	3.17	3.30	2.97	3.24
1348	NASDAQ	CHK	Wed, Jul 8, 1998	3.63	3.63	3.17	3.24
1347	NASDAQ	CHK	Tue, Jul 7, 1998	3.77	3.83	2.97	3.70
1346	NASDAQ	CHK	Mon, Jul 6, 1998	4.23	4.23	3.96	4.03
1345	NASDAQ	CHK	Thu, Jul 2, 1998	4.16	4.23	4.10	4.23
1344	NASDAQ	CHK	Wed, Jul 1, 1998	4.29	4.29	4.16	4.23
1343	NASDAQ	CHK	Tue, Jun 30, 1998	4.23	4.29	4.16	4.23
1342	NASDAQ	CHK	Mon, Jun 29, 1998	4.43	4.43	4.23	4.23
1341	NASDAQ	CHK	Fri, Jun 26, 1998	4.36	4.43	4.36	4.36
1340	NASDAQ	CHK	Thu, Jun 25, 1998	4.36	4.49	4.29	4.36
1339	NASDAQ	CHK	Wed, Jun 24, 1998	4.36	4.43	4.23	4.29
1338	NASDAQ	CHK	Tue, Jun 23, 1998	4.16	4.36	4.16	4.29
1337	NASDAQ	CHK	Mon, Jun 22, 1998	4.23	4.29	4.10	4.23
1336	NASDAQ	CHK	Fri, Jun 19, 1998	4.29	4.36	4.23	4.29
1335	NASDAQ	CHK	Thu, Jun 18, 1998	4.36	4.43	4.23	4.36
1334	NASDAQ	CHK	Wed, Jun 17, 1998	4.36	4.43	4.29	4.36
1333	NASDAQ	CHK	Tue, Jun 16, 1998	4.36	4.43	4.23	4.29
1332	NASDAQ	CHK	Mon, Jun 15, 1998	4.29	4.43	4.29	4.29
1331	NASDAQ	CHK	Fri, Jun 12, 1998	4.43	4.56	4.29	4.56
1330	NASDAQ	CHK	Thu, Jun 11, 1998	4.43	4.49	4.29	4.43
1329	NASDAQ	CHK	Wed, Jun 10, 1998	4.56	4.63	4.43	4.49
1328	NASDAQ	CHK	Tue, Jun 9, 1998	4.56	4.63	4.49	4.56
1327	NASDAQ	CHK	Mon, Jun 8, 1998	4.76	4.76	4.56	4.63
1326	NASDAQ	CHK	Fri, Jun 5, 1998	4.49	4.76	4.49	4.69
1325	NASDAQ	CHK	Thu, Jun 4, 1998	4.56	4.56	4.43	4.49
1324	NASDAQ	CHK	Wed, Jun 3, 1998	4.76	4.76	4.49	4.49
1323	NASDAQ	CHK	Tue, Jun 2, 1998	4.63	4.69	4.56	4.69
1322	NASDAQ	CHK	Mon, Jun 1, 1998	4.56	4.69	4.56	4.56
1321	NASDAQ	CHK	Fri, May 29, 1998	4.56	4.63	4.49	4.56
1320	NASDAQ	CHK	Thu, May 28, 1998	4.63	4.63	4.49	4.56
1319	NASDAQ	CHK	Wed, May 27, 1998	4.69	4.69	4.49	4.63
1318	NASDAQ	CHK	Tue, May 26, 1998	4.82	4.96	4.76	4.76
1317	NASDAQ	CHK	Fri, May 22, 1998	5.09	5.09	4.82	4.89
1316	NASDAQ	CHK	Thu, May 21, 1998	4.96	5.15	4.96	5.02
1315	NASDAQ	CHK	Wed, May 20, 1998	4.82	4.89	4.49	4.89
1314	NASDAQ	CHK	Tue, May 19, 1998	4.89	4.96	4.76	4.89
1313	NASDAQ	CHK	Mon, May 18, 1998	5.15	5.15	4.82	4.96
1312	NASDAQ	CHK	Fri, May 15, 1998	5.09	5.15	5.02	5.15
1311	NASDAQ	CHK	Thu, May 14, 1998	5.22	5.22	5.02	5.15
1310	NASDAQ	CHK	Wed, May 13, 1998	5.29	5.29	5.15	5.22
1309	NASDAQ	CHK	Tue, May 12, 1998	5.22	5.29	5.15	5.29
1308	NASDAQ	CHK	Mon, May 11, 1998	5.22	5.29	5.09	5.22
1307	NASDAQ	CHK	Fri, May 8, 1998	5.29	5.35	5.22	5.29
1306	NASDAQ	CHK	Thu, May 7, 1998	5.15	5.42	4.96	5.29
1305	NASDAQ	CHK	Wed, May 6, 1998	5.35	5.35	5.09	5.22
1304	NASDAQ	CHK	Tue, May 5, 1998	5.29	5.35	5.22	5.29
1303	NASDAQ	CHK	Mon, May 4, 1998	5.35	5.42	5.22	5.35
1302	NASDAQ	CHK	Fri, May 1, 1998	5.35	5.35	5.02	5.15
1301	NASDAQ	CHK	Thu, Apr 30, 1998	5.48	5.48	5.09	5.42
1300	NASDAQ	CHK	Wed, Apr 29, 1998	5.48	5.62	5.42	5.48
1299	NASDAQ	CHK	Tue, Apr 28, 1998	5.55	5.62	5.42	5.48
1298	NASDAQ	CHK	Mon, Apr 27, 1998	5.55	5.62	5.35	5.48
1297	NASDAQ	CHK	Fri, Apr 24, 1998	5.81	5.81	5.62	5.62
1296	NASDAQ	CHK	Thu, Apr 23, 1998	5.88	5.88	5.68	5.75
1295	NASDAQ	CHK	Wed, Apr 22, 1998	5.88	5.95	5.75	5.88
1294	NASDAQ	CHK	Tue, Apr 21, 1998	6.01	6.08	5.88	5.88
1293	NASDAQ	CHK	Mon, Apr 20, 1998	6.15	6.21	5.88	6.08
1292	NASDAQ	CHK	Fri, Apr 17, 1998	6.01	6.34	6.01	6.15
1291	NASDAQ	CHK	Thu, Apr 16, 1998	5.81	5.88	5.68	5.75
1290	NASDAQ	CHK	Wed, Apr 15, 1998	5.42	5.88	5.35	5.81
1289	NASDAQ	CHK	Tue, Apr 14, 1998	5.95	5.95	5.35	5.55
1288	NASDAQ	CHK	Mon, Apr 13, 1998	6.08	6.15	5.88	5.95
1287	NASDAQ	CHK	Thu, Apr 9, 1998	5.95	6.01	5.81	5.95
1286	NASDAQ	CHK	Wed, Apr 8, 1998	5.75	6.15	5.75	6.01
1285	NASDAQ	CHK	Tue, Apr 7, 1998	5.88	5.95	5.62	5.68
1284	NASDAQ	CHK	Mon, Apr 6, 1998	6.01	6.01	5.81	5.95
1283	NASDAQ	CHK	Fri, Apr 3, 1998	6.15	6.21	5.88	5.95
1282	NASDAQ	CHK	Thu, Apr 2, 1998	6.21	6.21	6.01	6.15
1281	NASDAQ	CHK	Wed, Apr 1, 1998	6.21	6.28	6.01	6.15
1280	NASDAQ	CHK	Tue, Mar 31, 1998	5.95	6.28	5.91	6.28
1279	NASDAQ	CHK	Mon, Mar 30, 1998	6.28	6.28	5.88	5.95
1278	NASDAQ	CHK	Fri, Mar 27, 1998	6.34	6.41	6.21	6.28
1277	NASDAQ	CHK	Thu, Mar 26, 1998	6.28	6.48	6.21	6.34
1276	NASDAQ	CHK	Wed, Mar 25, 1998	6.61	6.61	6.21	6.34
1275	NASDAQ	CHK	Tue, Mar 24, 1998	6.94	6.94	6.61	6.61
1274	NASDAQ	CHK	Mon, Mar 23, 1998	6.81	7.00	6.67	6.94
1273	NASDAQ	CHK	Fri, Mar 20, 1998	6.61	6.67	6.48	6.54
1272	NASDAQ	CHK	Thu, Mar 19, 1998	6.61	6.67	6.41	6.48
1271	NASDAQ	CHK	Wed, Mar 18, 1998	6.28	6.61	6.28	6.54
1270	NASDAQ	CHK	Tue, Mar 17, 1998	6.54	6.54	6.21	6.34
1269	NASDAQ	CHK	Mon, Mar 16, 1998	6.87	6.87	6.48	6.61
1268	NASDAQ	CHK	Fri, Mar 13, 1998	6.94	7.07	6.87	6.94
1267	NASDAQ	CHK	Thu, Mar 12, 1998	6.74	6.94	6.74	6.87
1266	NASDAQ	CHK	Wed, Mar 11, 1998	7.14	7.14	6.67	6.67
1265	NASDAQ	CHK	Tue, Mar 10, 1998	7.14	7.27	6.87	7.14
1264	NASDAQ	CHK	Mon, Mar 9, 1998	7.33	7.40	6.94	7.14
1263	NASDAQ	CHK	Fri, Mar 6, 1998	7.66	7.73	7.27	7.40
1262	NASDAQ	CHK	Thu, Mar 5, 1998	7.47	7.86	7.33	7.60
1261	NASDAQ	CHK	Wed, Mar 4, 1998	7.40	7.73	7.33	7.53
1260	NASDAQ	CHK	Tue, Mar 3, 1998	7.33	7.40	7.14	7.40
1259	NASDAQ	CHK	Mon, Mar 2, 1998	7.47	7.66	7.33	7.40
1258	NASDAQ	CHK	Fri, Feb 27, 1998	6.81	7.60	6.74	7.47
1257	NASDAQ	CHK	Thu, Feb 26, 1998	6.74	7.07	6.74	6.74
1256	NASDAQ	CHK	Wed, Feb 25, 1998	6.67	6.81	6.41	6.74
1255	NASDAQ	CHK	Tue, Feb 24, 1998	6.54	6.54	6.41	6.54
1254	NASDAQ	CHK	Mon, Feb 23, 1998	6.67	6.74	6.41	6.54
1253	NASDAQ	CHK	Fri, Feb 20, 1998	6.87	6.87	6.61	6.81
1252	NASDAQ	CHK	Thu, Feb 19, 1998	6.94	7.00	6.74	6.87
1251	NASDAQ	CHK	Wed, Feb 18, 1998	6.81	6.94	6.54	6.87
1250	NASDAQ	CHK	Tue, Feb 17, 1998	7.20	7.20	6.81	6.87
1249	NASDAQ	CHK	Fri, Feb 13, 1998	7.14	7.27	6.87	7.07
1248	NASDAQ	CHK	Thu, Feb 12, 1998	6.34	7.27	6.34	7.00
1247	NASDAQ	CHK	Wed, Feb 11, 1998	6.34	6.41	6.21	6.28
1246	NASDAQ	CHK	Tue, Feb 10, 1998	6.28	6.34	6.21	6.34
1245	NASDAQ	CHK	Mon, Feb 9, 1998	6.34	6.34	6.15	6.34
1244	NASDAQ	CHK	Fri, Feb 6, 1998	6.34	6.48	6.21	6.34
1243	NASDAQ	CHK	Thu, Feb 5, 1998	6.34	6.48	6.28	6.41
1242	NASDAQ	CHK	Wed, Feb 4, 1998	6.28	6.54	6.21	6.41
1241	NASDAQ	CHK	Tue, Feb 3, 1998	6.15	6.41	6.08	6.28
1240	NASDAQ	CHK	Mon, Feb 2, 1998	6.15	6.21	6.01	6.15
1239	NASDAQ	CHK	Fri, Jan 30, 1998	6.34	6.34	5.95	6.08
1238	NASDAQ	CHK	Thu, Jan 29, 1998	5.81	6.41	5.81	6.28
1237	NASDAQ	CHK	Wed, Jan 28, 1998	6.21	6.21	5.81	5.95
1236	NASDAQ	CHK	Tue, Jan 27, 1998	6.34	6.34	6.08	6.08
1235	NASDAQ	CHK	Mon, Jan 26, 1998	6.41	6.41	6.28	6.34
1234	NASDAQ	CHK	Fri, Jan 23, 1998	6.34	6.61	6.21	6.34
1233	NASDAQ	CHK	Thu, Jan 22, 1998	6.28	6.34	6.01	6.21
1232	NASDAQ	CHK	Wed, Jan 21, 1998	6.41	6.48	6.21	6.41
1231	NASDAQ	CHK	Tue, Jan 20, 1998	6.54	6.54	6.41	6.41
1230	NASDAQ	CHK	Fri, Jan 16, 1998	6.81	6.81	6.28	6.48
1229	NASDAQ	CHK	Thu, Jan 15, 1998	6.81	7.00	6.67	6.74
1228	NASDAQ	CHK	Wed, Jan 14, 1998	6.34	6.87	6.34	6.81
1227	NASDAQ	CHK	Tue, Jan 13, 1998	5.88	6.28	5.88	6.21
1226	NASDAQ	CHK	Mon, Jan 12, 1998	5.95	6.08	5.81	5.88
1225	NASDAQ	CHK	Fri, Jan 9, 1998	6.34	6.34	6.08	6.08
1224	NASDAQ	CHK	Thu, Jan 8, 1998	6.48	6.61	6.08	6.34
1223	NASDAQ	CHK	Wed, Jan 7, 1998	7.07	7.07	6.48	6.61
1222	NASDAQ	CHK	Tue, Jan 6, 1998	7.53	7.60	6.81	7.07
1221	NASDAQ	CHK	Mon, Jan 5, 1998	8.06	8.06	7.53	7.60
1220	NASDAQ	CHK	Fri, Jan 2, 1998	8.13	8.19	7.93	8.06
1219	NASDAQ	CHK	Wed, Dec 31, 1997	7.53	8.06	7.47	8.00
1218	NASDAQ	CHK	Tue, Dec 30, 1997	7.53	7.60	7.20	7.53
1217	NASDAQ	CHK	Mon, Dec 29, 1997	7.60	7.73	7.47	7.53
1216	NASDAQ	CHK	Fri, Dec 26, 1997	7.60	7.60	7.40	7.53
1215	NASDAQ	CHK	Wed, Dec 24, 1997	7.66	7.73	7.40	7.53
1214	NASDAQ	CHK	Tue, Dec 23, 1997	7.86	8.13	7.53	7.60
1213	NASDAQ	CHK	Mon, Dec 22, 1997	7.73	8.06	7.73	7.93
1212	NASDAQ	CHK	Fri, Dec 19, 1997	7.93	8.00	7.66	7.86
1211	NASDAQ	CHK	Thu, Dec 18, 1997	8.00	8.13	7.86	8.13
1210	NASDAQ	CHK	Wed, Dec 17, 1997	8.06	8.19	7.93	8.00
1209	NASDAQ	CHK	Tue, Dec 16, 1997	7.80	8.33	7.80	7.93
1208	NASDAQ	CHK	Mon, Dec 15, 1997	7.80	7.86	7.47	7.66
1207	NASDAQ	CHK	Fri, Dec 12, 1997	7.66	8.06	7.66	7.73
1206	NASDAQ	CHK	Thu, Dec 11, 1997	7.93	7.93	7.47	7.66
1205	NASDAQ	CHK	Wed, Dec 10, 1997	7.93	8.26	7.80	8.06
1204	NASDAQ	CHK	Tue, Dec 9, 1997	8.26	8.33	7.86	7.93
1203	NASDAQ	CHK	Mon, Dec 8, 1997	8.39	8.66	8.26	8.33
1202	NASDAQ	CHK	Fri, Dec 5, 1997	8.46	8.72	8.33	8.39
1201	NASDAQ	CHK	Thu, Dec 4, 1997	7.66	8.79	7.40	8.59
1200	NASDAQ	CHK	Wed, Dec 3, 1997	7.73	7.73	7.40	7.40
1199	NASDAQ	CHK	Tue, Dec 2, 1997	7.73	8.00	7.66	7.80
1198	NASDAQ	CHK	Mon, Dec 1, 1997	8.19	8.19	7.80	7.86
1197	NASDAQ	CHK	Fri, Nov 28, 1997	8.19	8.39	8.13	8.13
1196	NASDAQ	CHK	Wed, Nov 26, 1997	8.46	8.66	8.13	8.19
1195	NASDAQ	CHK	Tue, Nov 25, 1997	8.92	8.99	8.39	8.46
1194	NASDAQ	CHK	Mon, Nov 24, 1997	9.12	9.18	8.72	8.99
1193	NASDAQ	CHK	Fri, Nov 21, 1997	9.25	9.45	8.99	9.05
1192	NASDAQ	CHK	Thu, Nov 20, 1997	9.32	9.78	9.32	9.45
1191	NASDAQ	CHK	Wed, Nov 19, 1997	9.85	9.85	9.25	9.32
1190	NASDAQ	CHK	Tue, Nov 18, 1997	9.91	10.04	9.78	9.78
1189	NASDAQ	CHK	Mon, Nov 17, 1997	10.44	10.51	9.85	9.91
1188	NASDAQ	CHK	Fri, Nov 14, 1997	10.11	10.37	9.98	10.11
1187	NASDAQ	CHK	Thu, Nov 13, 1997	10.84	10.84	9.85	10.11
1186	NASDAQ	CHK	Wed, Nov 12, 1997	11.03	11.30	10.70	10.84
1185	NASDAQ	CHK	Tue, Nov 11, 1997	11.43	11.50	10.70	10.97
1184	NASDAQ	CHK	Mon, Nov 10, 1997	11.43	11.83	11.37	11.50
1183	NASDAQ	CHK	Fri, Nov 7, 1997	11.96	11.96	11.37	11.37
1182	NASDAQ	CHK	Thu, Nov 6, 1997	12.29	12.42	11.76	12.42
1181	NASDAQ	CHK	Wed, Nov 5, 1997	11.83	12.62	11.56	11.76
1180	NASDAQ	CHK	Tue, Nov 4, 1997	10.77	11.70	10.70	11.37
1179	NASDAQ	CHK	Mon, Nov 3, 1997	10.57	10.77	10.31	10.77
1178	NASDAQ	CHK	Fri, Oct 31, 1997	10.57	10.77	10.24	10.37
1177	NASDAQ	CHK	Thu, Oct 30, 1997	10.37	10.77	10.18	10.44
1176	NASDAQ	CHK	Wed, Oct 29, 1997	10.51	10.84	10.31	10.51
1175	NASDAQ	CHK	Tue, Oct 28, 1997	9.25	10.64	9.12	10.31
1174	NASDAQ	CHK	Mon, Oct 27, 1997	11.30	11.37	9.78	9.85
1173	NASDAQ	CHK	Fri, Oct 24, 1997	11.50	11.89	11.43	11.50
1172	NASDAQ	CHK	Thu, Oct 23, 1997	11.70	12.42	11.10	11.23
1171	NASDAQ	CHK	Wed, Oct 22, 1997	13.35	13.48	12.49	12.55
1170	NASDAQ	CHK	Tue, Oct 21, 1997	12.88	13.55	12.69	13.48
1169	NASDAQ	CHK	Mon, Oct 20, 1997	12.36	12.95	12.29	12.88
1168	NASDAQ	CHK	Fri, Oct 17, 1997	12.75	12.75	11.96	12.36
1167	NASDAQ	CHK	Thu, Oct 16, 1997	13.22	13.35	12.55	12.62
1166	NASDAQ	CHK	Wed, Oct 15, 1997	13.55	13.68	12.69	13.08
1165	NASDAQ	CHK	Tue, Oct 14, 1997	13.15	13.94	13.15	13.61
1164	NASDAQ	CHK	Mon, Oct 13, 1997	13.74	13.81	13.02	13.08
1163	NASDAQ	CHK	Fri, Oct 10, 1997	13.28	14.21	13.08	13.68
1162	NASDAQ	CHK	Thu, Oct 9, 1997	12.62	13.55	12.55	13.28
1161	NASDAQ	CHK	Wed, Oct 8, 1997	11.76	12.95	11.23	12.75
1160	NASDAQ	CHK	Tue, Oct 7, 1997	12.16	12.29	11.63	11.76
1159	NASDAQ	CHK	Mon, Oct 6, 1997	12.55	12.55	11.76	12.16
1158	NASDAQ	CHK	Fri, Oct 3, 1997	12.09	12.55	11.76	12.49
1157	NASDAQ	CHK	Thu, Oct 2, 1997	11.23	12.09	11.03	11.96
1156	NASDAQ	CHK	Wed, Oct 1, 1997	12.09	12.09	10.97	11.30
1155	NASDAQ	CHK	Tue, Sep 30, 1997	11.63	12.16	11.50	12.03
1154	NASDAQ	CHK	Mon, Sep 29, 1997	10.51	11.83	10.24	11.56
1153	NASDAQ	CHK	Fri, Sep 26, 1997	10.18	10.77	10.18	10.57
1152	NASDAQ	CHK	Thu, Sep 25, 1997	9.58	10.57	9.58	10.11
1151	NASDAQ	CHK	Wed, Sep 24, 1997	9.25	9.98	9.25	9.51
1150	NASDAQ	CHK	Tue, Sep 23, 1997	9.25	9.32	9.05	9.32
1149	NASDAQ	CHK	Mon, Sep 22, 1997	9.25	9.38	9.18	9.25
1148	NASDAQ	CHK	Fri, Sep 19, 1997	9.18	9.38	8.99	9.25
1147	NASDAQ	CHK	Thu, Sep 18, 1997	9.51	9.58	9.05	9.18
1146	NASDAQ	CHK	Wed, Sep 17, 1997	9.71	9.78	9.12	9.51
1145	NASDAQ	CHK	Tue, Sep 16, 1997	10.04	10.31	9.65	9.71
1144	NASDAQ	CHK	Mon, Sep 15, 1997	9.98	10.04	9.71	9.91
1143	NASDAQ	CHK	Fri, Sep 12, 1997	10.24	10.24	9.78	9.98
1142	NASDAQ	CHK	Thu, Sep 11, 1997	10.64	10.84	9.98	10.37
1141	NASDAQ	CHK	Wed, Sep 10, 1997	10.64	10.97	10.37	10.70
1140	NASDAQ	CHK	Tue, Sep 9, 1997	9.98	10.77	9.71	10.70
1139	NASDAQ	CHK	Mon, Sep 8, 1997	9.78	9.98	9.65	9.91
1138	NASDAQ	CHK	Fri, Sep 5, 1997	9.98	10.37	9.58	9.78
1137	NASDAQ	CHK	Thu, Sep 4, 1997	8.99	10.04	8.85	9.65
1136	NASDAQ	CHK	Wed, Sep 3, 1997	9.12	9.18	8.46	8.99
1135	NASDAQ	CHK	Tue, Sep 2, 1997	9.05	9.45	8.52	9.25
1134	NASDAQ	CHK	Fri, Aug 29, 1997	8.33	9.12	7.53	9.05
1133	NASDAQ	CHK	Thu, Aug 28, 1997	7.93	8.85	7.86	8.59
1132	NASDAQ	CHK	Wed, Aug 27, 1997	7.93	8.13	7.80	7.86
1131	NASDAQ	CHK	Tue, Aug 26, 1997	8.13	8.13	7.66	7.80
1130	NASDAQ	CHK	Mon, Aug 25, 1997	7.73	8.26	7.66	7.93
1129	NASDAQ	CHK	Fri, Aug 22, 1997	7.66	7.86	7.27	7.86
1128	NASDAQ	CHK	Thu, Aug 21, 1997	7.66	7.80	7.40	7.73
1127	NASDAQ	CHK	Wed, Aug 20, 1997	8.19	8.19	7.73	7.80
1126	NASDAQ	CHK	Tue, Aug 19, 1997	8.26	8.26	8.06	8.19
1125	NASDAQ	CHK	Mon, Aug 18, 1997	8.46	8.46	8.13	8.26
1124	NASDAQ	CHK	Fri, Aug 15, 1997	8.26	8.66	8.19	8.46
1123	NASDAQ	CHK	Thu, Aug 14, 1997	8.59	8.59	8.19	8.26
1122	NASDAQ	CHK	Wed, Aug 13, 1997	9.05	9.05	8.46	8.46
1121	NASDAQ	CHK	Tue, Aug 12, 1997	9.18	9.18	8.79	8.92
1120	NASDAQ	CHK	Mon, Aug 11, 1997	8.85	9.25	8.72	9.05
1119	NASDAQ	CHK	Fri, Aug 8, 1997	8.92	8.99	8.59	8.85
1118	NASDAQ	CHK	Thu, Aug 7, 1997	9.12	9.25	8.59	8.92
1117	NASDAQ	CHK	Wed, Aug 6, 1997	9.51	9.78	9.12	9.18
1116	NASDAQ	CHK	Tue, Aug 5, 1997	8.66	9.38	8.33	8.99
1115	NASDAQ	CHK	Mon, Aug 4, 1997	7.27	8.92	6.67	8.19
1114	NASDAQ	CHK	Fri, Aug 1, 1997	8.19	8.19	7.07	7.40
1113	NASDAQ	CHK	Thu, Jul 31, 1997	8.46	8.46	8.26	8.33
1112	NASDAQ	CHK	Wed, Jul 30, 1997	8.72	8.72	8.33	8.46
1111	NASDAQ	CHK	Tue, Jul 29, 1997	8.85	8.99	8.72	8.92
1110	NASDAQ	CHK	Mon, Jul 28, 1997	8.79	9.05	8.79	8.79
1109	NASDAQ	CHK	Fri, Jul 25, 1997	9.12	9.45	9.12	9.18
1108	NASDAQ	CHK	Thu, Jul 24, 1997	8.52	9.18	8.52	9.12
1107	NASDAQ	CHK	Wed, Jul 23, 1997	8.52	8.59	8.46	8.46
1106	NASDAQ	CHK	Tue, Jul 22, 1997	8.79	8.85	8.46	8.52
1105	NASDAQ	CHK	Mon, Jul 21, 1997	8.92	8.99	8.59	8.72
1104	NASDAQ	CHK	Fri, Jul 18, 1997	9.12	9.12	8.72	9.05
1103	NASDAQ	CHK	Thu, Jul 17, 1997	8.33	9.32	8.26	9.18
1102	NASDAQ	CHK	Wed, Jul 16, 1997	8.46	8.46	8.26	8.26
1101	NASDAQ	CHK	Tue, Jul 15, 1997	8.39	8.66	8.33	8.46
1100	NASDAQ	CHK	Mon, Jul 14, 1997	8.59	8.59	8.19	8.33
1099	NASDAQ	CHK	Fri, Jul 11, 1997	8.46	8.59	8.33	8.59
1098	NASDAQ	CHK	Thu, Jul 10, 1997	9.05	9.18	8.19	8.52
1097	NASDAQ	CHK	Wed, Jul 9, 1997	9.32	9.45	9.05	9.05
1096	NASDAQ	CHK	Tue, Jul 8, 1997	9.51	9.65	9.12	9.25
1095	NASDAQ	CHK	Mon, Jul 7, 1997	9.12	9.45	8.99	9.45
1094	NASDAQ	CHK	Thu, Jul 3, 1997	9.05	9.12	8.99	8.99
1093	NASDAQ	CHK	Wed, Jul 2, 1997	9.51	9.51	8.92	8.92
1092	NASDAQ	CHK	Tue, Jul 1, 1997	10.57	10.57	8.85	9.25
1091	NASDAQ	CHK	Mon, Jun 30, 1997	9.91	10.57	9.91	10.51
1090	NASDAQ	CHK	Fri, Jun 27, 1997	12.62	12.62	9.45	9.65
1089	NASDAQ	CHK	Thu, Jun 26, 1997	12.69	12.82	12.29	12.75
1088	NASDAQ	CHK	Wed, Jun 25, 1997	14.74	14.74	12.95	13.22
1087	NASDAQ	CHK	Tue, Jun 24, 1997	14.93	15.00	14.80	14.87
1086	NASDAQ	CHK	Mon, Jun 23, 1997	15.46	15.73	14.80	14.93
1085	NASDAQ	CHK	Fri, Jun 20, 1997	15.59	15.59	15.33	15.46
1084	NASDAQ	CHK	Thu, Jun 19, 1997	15.86	15.86	15.46	15.59
1083	NASDAQ	CHK	Wed, Jun 18, 1997	15.46	16.25	15.20	15.73
1082	NASDAQ	CHK	Tue, Jun 17, 1997	15.07	15.73	15.07	15.59
1081	NASDAQ	CHK	Mon, Jun 16, 1997	15.59	15.73	15.07	15.07
1080	NASDAQ	CHK	Fri, Jun 13, 1997	15.20	15.86	15.07	15.59
1079	NASDAQ	CHK	Thu, Jun 12, 1997	15.33	15.33	14.67	15.20
1078	NASDAQ	CHK	Wed, Jun 11, 1997	15.59	15.59	14.93	15.20
1077	NASDAQ	CHK	Tue, Jun 10, 1997	15.86	15.99	15.59	15.73
1076	NASDAQ	CHK	Mon, Jun 9, 1997	15.86	16.25	15.73	15.86
1075	NASDAQ	CHK	Fri, Jun 6, 1997	16.39	16.39	15.46	15.86
1074	NASDAQ	CHK	Thu, Jun 5, 1997	17.58	17.71	16.25	16.52
1073	NASDAQ	CHK	Wed, Jun 4, 1997	17.31	18.24	17.05	17.31
1072	NASDAQ	CHK	Tue, Jun 3, 1997	16.65	17.58	16.65	17.31
1071	NASDAQ	CHK	Mon, Jun 2, 1997	15.07	16.52	14.93	16.52
1070	NASDAQ	CHK	Fri, May 30, 1997	15.07	15.33	14.54	14.93
1069	NASDAQ	CHK	Thu, May 29, 1997	15.59	15.73	14.93	15.07
1068	NASDAQ	CHK	Wed, May 28, 1997	16.12	16.12	15.46	15.59
1067	NASDAQ	CHK	Tue, May 27, 1997	16.39	16.39	15.86	15.99
1066	NASDAQ	CHK	Fri, May 23, 1997	16.12	16.39	16.12	16.39
1065	NASDAQ	CHK	Thu, May 22, 1997	16.25	16.39	15.99	16.25
1064	NASDAQ	CHK	Wed, May 21, 1997	16.25	16.52	15.99	16.25
1063	NASDAQ	CHK	Tue, May 20, 1997	16.52	16.52	15.99	16.39
1062	NASDAQ	CHK	Mon, May 19, 1997	17.05	17.05	16.52	16.52
1061	NASDAQ	CHK	Fri, May 16, 1997	16.92	17.05	16.25	17.05
1060	NASDAQ	CHK	Thu, May 15, 1997	17.58	17.58	16.92	17.05
1059	NASDAQ	CHK	Wed, May 14, 1997	17.58	17.84	17.31	17.44
1058	NASDAQ	CHK	Tue, May 13, 1997	17.97	17.97	17.05	17.44
1057	NASDAQ	CHK	Mon, May 12, 1997	17.58	18.37	17.58	17.84
1056	NASDAQ	CHK	Fri, May 9, 1997	16.65	17.58	16.65	17.44
1055	NASDAQ	CHK	Thu, May 8, 1997	16.39	16.92	16.39	16.78
1054	NASDAQ	CHK	Wed, May 7, 1997	16.92	17.05	16.12	16.39
1053	NASDAQ	CHK	Tue, May 6, 1997	17.44	17.84	17.05	17.05
1052	NASDAQ	CHK	Mon, May 5, 1997	16.52	18.10	16.52	18.10
1051	NASDAQ	CHK	Fri, May 2, 1997	16.25	16.92	16.25	16.72
1050	NASDAQ	CHK	Thu, May 1, 1997	15.99	17.31	15.86	16.12
1049	NASDAQ	CHK	Wed, Apr 30, 1997	15.07	16.12	14.67	15.99
1048	NASDAQ	CHK	Tue, Apr 29, 1997	14.54	15.07	14.27	15.07
1047	NASDAQ	CHK	Mon, Apr 28, 1997	15.07	15.20	14.14	14.27
1046	NASDAQ	CHK	Fri, Apr 25, 1997	15.46	15.46	14.67	15.07
1045	NASDAQ	CHK	Thu, Apr 24, 1997	16.25	16.65	15.07	15.46
1044	NASDAQ	CHK	Wed, Apr 23, 1997	16.12	16.52	16.12	16.12
1043	NASDAQ	CHK	Tue, Apr 22, 1997	15.59	16.12	15.59	15.99
1042	NASDAQ	CHK	Mon, Apr 21, 1997	15.26	16.12	15.26	15.46
1041	NASDAQ	CHK	Fri, Apr 18, 1997	16.65	16.65	14.80	15.20
1040	NASDAQ	CHK	Thu, Apr 17, 1997	16.52	16.65	15.99	16.52
1039	NASDAQ	CHK	Wed, Apr 16, 1997	17.58	17.58	15.86	15.99
1038	NASDAQ	CHK	Tue, Apr 15, 1997	16.92	17.97	16.52	17.44
1037	NASDAQ	CHK	Mon, Apr 14, 1997	19.29	19.29	16.12	16.65
1036	NASDAQ	CHK	Fri, Apr 11, 1997	20.22	20.22	18.90	19.43
1035	NASDAQ	CHK	Thu, Apr 10, 1997	21.28	21.28	19.56	20.35
1034	NASDAQ	CHK	Wed, Apr 9, 1997	22.33	22.47	21.28	21.41
1033	NASDAQ	CHK	Tue, Apr 8, 1997	22.47	22.73	22.20	22.60
1032	NASDAQ	CHK	Mon, Apr 7, 1997	22.60	22.99	22.33	22.47
1031	NASDAQ	CHK	Fri, Apr 4, 1997	22.60	22.99	22.20	22.73
1030	NASDAQ	CHK	Thu, Apr 3, 1997	23.52	23.66	22.07	22.86
1029	NASDAQ	CHK	Wed, Apr 2, 1997	24.05	24.84	23.66	23.66
1028	NASDAQ	CHK	Tue, Apr 1, 1997	22.20	23.79	22.20	23.26
1027	NASDAQ	CHK	Mon, Mar 31, 1997	23.26	23.26	21.67	22.07
1026	NASDAQ	CHK	Thu, Mar 27, 1997	24.32	24.32	22.99	23.26
1025	NASDAQ	CHK	Wed, Mar 26, 1997	23.13	24.98	23.13	24.32
1024	NASDAQ	CHK	Tue, Mar 25, 1997	23.13	23.39	22.99	23.13
1023	NASDAQ	CHK	Mon, Mar 24, 1997	24.32	24.45	22.99	23.13
1022	NASDAQ	CHK	Fri, Mar 21, 1997	25.11	25.11	24.05	24.32
1021	NASDAQ	CHK	Thu, Mar 20, 1997	24.05	25.24	23.52	25.11
1020	NASDAQ	CHK	Wed, Mar 19, 1997	23.26	24.32	23.13	24.18
1019	NASDAQ	CHK	Tue, Mar 18, 1997	22.20	24.18	22.20	23.28
1018	NASDAQ	CHK	Mon, Mar 17, 1997	22.47	22.86	22.07	22.20
1017	NASDAQ	CHK	Fri, Mar 14, 1997	21.94	22.47	21.94	22.20
1016	NASDAQ	CHK	Thu, Mar 13, 1997	22.20	22.33	21.94	22.07
1015	NASDAQ	CHK	Wed, Mar 12, 1997	22.47	22.86	22.07	22.20
1014	NASDAQ	CHK	Tue, Mar 11, 1997	22.73	22.73	21.94	22.47
1013	NASDAQ	CHK	Mon, Mar 10, 1997	22.47	22.86	22.33	22.60
1012	NASDAQ	CHK	Fri, Mar 7, 1997	22.47	22.99	22.33	22.73
1011	NASDAQ	CHK	Thu, Mar 6, 1997	22.86	22.86	21.94	22.33
1010	NASDAQ	CHK	Wed, Mar 5, 1997	22.86	23.26	22.47	22.73
1009	NASDAQ	CHK	Tue, Mar 4, 1997	23.26	23.52	22.60	22.73
1008	NASDAQ	CHK	Mon, Mar 3, 1997	21.94	23.13	21.81	23.13
1007	NASDAQ	CHK	Fri, Feb 28, 1997	21.94	22.07	21.54	21.94
1006	NASDAQ	CHK	Thu, Feb 27, 1997	22.60	23.39	21.81	21.81
1005	NASDAQ	CHK	Wed, Feb 26, 1997	22.99	22.99	21.94	22.33
1004	NASDAQ	CHK	Tue, Feb 25, 1997	24.18	24.32	22.73	23.79
1003	NASDAQ	CHK	Mon, Feb 24, 1997	24.45	24.71	24.05	24.32
1002	NASDAQ	CHK	Fri, Feb 21, 1997	25.51	25.51	23.79	24.58
1001	NASDAQ	CHK	Thu, Feb 20, 1997	26.30	26.56	24.98	25.51
1000	NASDAQ	CHK	Wed, Feb 19, 1997	24.98	26.03	24.32	26.03
999	NASDAQ	CHK	Tue, Feb 18, 1997	25.24	25.24	24.05	24.98
998	NASDAQ	CHK	Fri, Feb 14, 1997	24.58	25.24	24.45	25.11
997	NASDAQ	CHK	Thu, Feb 13, 1997	25.37	25.37	23.79	24.32
996	NASDAQ	CHK	Wed, Feb 12, 1997	22.73	24.84	22.47	24.84
995	NASDAQ	CHK	Tue, Feb 11, 1997	21.41	23.26	21.14	22.47
994	NASDAQ	CHK	Mon, Feb 10, 1997	24.18	24.18	20.48	21.01
993	NASDAQ	CHK	Fri, Feb 7, 1997	24.58	25.51	24.32	24.32
992	NASDAQ	CHK	Thu, Feb 6, 1997	23.13	24.18	22.80	24.18
991	NASDAQ	CHK	Wed, Feb 5, 1997	24.98	24.98	22.99	23.13
990	NASDAQ	CHK	Tue, Feb 4, 1997	24.32	25.37	24.18	24.84
989	NASDAQ	CHK	Mon, Feb 3, 1997	25.11	25.24	23.92	24.18
988	NASDAQ	CHK	Fri, Jan 31, 1997	26.83	26.83	24.84	25.24
987	NASDAQ	CHK	Thu, Jan 30, 1997	27.36	27.49	26.69	26.83
986	NASDAQ	CHK	Wed, Jan 29, 1997	26.96	27.75	26.96	27.22
985	NASDAQ	CHK	Tue, Jan 28, 1997	27.88	27.88	26.83	26.96
984	NASDAQ	CHK	Mon, Jan 27, 1997	27.36	27.75	26.56	26.96
983	NASDAQ	CHK	Fri, Jan 24, 1997	27.09	27.62	26.83	27.09
982	NASDAQ	CHK	Thu, Jan 23, 1997	26.43	28.15	26.30	26.56
981	NASDAQ	CHK	Wed, Jan 22, 1997	26.56	26.56	24.71	25.90
980	NASDAQ	CHK	Tue, Jan 21, 1997	27.36	27.36	26.30	26.69
979	NASDAQ	CHK	Mon, Jan 20, 1997	28.54	28.94	27.49	27.49
978	NASDAQ	CHK	Fri, Jan 17, 1997	28.28	29.34	27.49	27.75
977	NASDAQ	CHK	Thu, Jan 16, 1997	29.60	29.60	27.22	28.28
976	NASDAQ	CHK	Wed, Jan 15, 1997	31.32	31.32	28.81	29.60
975	NASDAQ	CHK	Tue, Jan 14, 1997	32.25	32.25	31.19	31.19
974	NASDAQ	CHK	Mon, Jan 13, 1997	32.38	32.77	31.85	32.25
973	NASDAQ	CHK	Fri, Jan 10, 1997	30.79	32.11	30.66	32.11
972	NASDAQ	CHK	Thu, Jan 9, 1997	33.04	33.17	30.40	31.58
971	NASDAQ	CHK	Wed, Jan 8, 1997	31.72	33.57	31.45	33.30
970	NASDAQ	CHK	Tue, Jan 7, 1997	29.87	31.32	29.21	31.19
969	NASDAQ	CHK	Mon, Jan 6, 1997	28.15	30.26	27.36	28.81
968	NASDAQ	CHK	Fri, Jan 3, 1997	28.54	29.21	27.49	27.88
967	NASDAQ	CHK	Thu, Jan 2, 1997	29.34	29.34	27.75	28.28
966	NASDAQ	CHK	Tue, Dec 31, 1996	58.41	58.94	55.64	58.81
965	NASDAQ	CHK	Mon, Dec 30, 1996	58.81	61.32	58.01	58.15
964	NASDAQ	CHK	Fri, Dec 27, 1996	54.58	58.28	54.58	57.49
963	NASDAQ	CHK	Thu, Dec 26, 1996	54.31	54.71	54.18	54.45
962	NASDAQ	CHK	Tue, Dec 24, 1996	54.71	54.71	53.65	54.31
961	NASDAQ	CHK	Mon, Dec 23, 1996	56.96	56.96	54.05	54.84
960	NASDAQ	CHK	Fri, Dec 20, 1996	57.75	58.41	57.22	57.35
959	NASDAQ	CHK	Thu, Dec 19, 1996	55.77	57.62	55.37	57.09
958	NASDAQ	CHK	Wed, Dec 18, 1996	55.37	56.16	54.98	55.24
957	NASDAQ	CHK	Tue, Dec 17, 1996	55.50	56.43	54.45	55.24
956	NASDAQ	CHK	Mon, Dec 16, 1996	54.84	56.83	54.84	55.24
955	NASDAQ	CHK	Fri, Dec 13, 1996	56.43	56.69	53.65	54.71
954	NASDAQ	CHK	Thu, Dec 12, 1996	56.16	58.15	54.98	56.30
953	NASDAQ	CHK	Wed, Dec 11, 1996	56.03	56.56	52.73	54.31
952	NASDAQ	CHK	Tue, Dec 10, 1996	63.04	63.04	57.62	58.01
951	NASDAQ	CHK	Mon, Dec 9, 1996	63.04	63.57	62.90	62.90
950	NASDAQ	CHK	Fri, Dec 6, 1996	63.30	64.23	62.11	63.17
949	NASDAQ	CHK	Thu, Dec 5, 1996	65.42	65.42	64.23	64.62
948	NASDAQ	CHK	Wed, Dec 4, 1996	69.25	69.64	64.49	65.42
947	NASDAQ	CHK	Tue, Dec 3, 1996	66.47	70.04	65.02	69.12
946	NASDAQ	CHK	Mon, Dec 2, 1996	69.12	69.25	65.02	66.34
945	NASDAQ	CHK	Fri, Nov 29, 1996	69.25	69.25	69.12	69.12
944	NASDAQ	CHK	Wed, Nov 27, 1996	69.25	69.78	69.12	69.12
943	NASDAQ	CHK	Tue, Nov 26, 1996	72.16	72.82	67.66	68.98
942	NASDAQ	CHK	Mon, Nov 25, 1996	70.44	72.82	70.17	72.16
941	NASDAQ	CHK	Fri, Nov 22, 1996	69.38	71.10	69.38	70.44
940	NASDAQ	CHK	Thu, Nov 21, 1996	71.23	71.63	69.12	69.51
939	NASDAQ	CHK	Wed, Nov 20, 1996	71.23	72.68	71.10	71.10
938	NASDAQ	CHK	Tue, Nov 19, 1996	69.51	71.49	69.12	71.23
937	NASDAQ	CHK	Mon, Nov 18, 1996	71.36	71.49	67.93	69.51
936	NASDAQ	CHK	Fri, Nov 15, 1996	69.78	72.68	69.78	71.63
935	NASDAQ	CHK	Thu, Nov 14, 1996	67.66	69.25	67.66	69.12
934	NASDAQ	CHK	Wed, Nov 13, 1996	62.38	67.13	62.38	67.13
933	NASDAQ	CHK	Tue, Nov 12, 1996	60.79	62.90	60.79	62.11
932	NASDAQ	CHK	Mon, Nov 11, 1996	60.00	61.19	59.73	60.92
931	NASDAQ	CHK	Fri, Nov 8, 1996	60.79	60.79	59.60	59.87
930	NASDAQ	CHK	Thu, Nov 7, 1996	61.58	63.04	60.66	60.79
929	NASDAQ	CHK	Wed, Nov 6, 1996	58.41	63.96	58.41	61.72
928	NASDAQ	CHK	Tue, Nov 5, 1996	58.54	58.68	57.49	58.41
927	NASDAQ	CHK	Mon, Nov 4, 1996	58.54	59.73	58.41	58.41
926	NASDAQ	CHK	Fri, Nov 1, 1996	61.45	61.45	58.28	58.68
925	NASDAQ	CHK	Thu, Oct 31, 1996	61.05	63.04	61.05	61.72
924	NASDAQ	CHK	Wed, Oct 30, 1996	58.54	62.64	58.15	61.98
923	NASDAQ	CHK	Tue, Oct 29, 1996	56.83	58.41	55.37	58.28
922	NASDAQ	CHK	Mon, Oct 28, 1996	57.88	58.15	56.83	58.01
921	NASDAQ	CHK	Fri, Oct 25, 1996	56.96	59.47	56.30	57.49
920	NASDAQ	CHK	Thu, Oct 24, 1996	57.35	58.41	56.96	56.96
919	NASDAQ	CHK	Wed, Oct 23, 1996	58.68	59.60	56.83	58.15
918	NASDAQ	CHK	Tue, Oct 22, 1996	63.17	63.17	57.88	58.68
917	NASDAQ	CHK	Mon, Oct 21, 1996	65.28	65.28	63.17	63.30
916	NASDAQ	CHK	Fri, Oct 18, 1996	66.74	67.66	65.28	65.28
915	NASDAQ	CHK	Thu, Oct 17, 1996	66.21	67.13	64.89	66.21
914	NASDAQ	CHK	Wed, Oct 16, 1996	66.60	66.60	65.68	66.21
913	NASDAQ	CHK	Tue, Oct 15, 1996	65.28	67.00	65.28	66.47
912	NASDAQ	CHK	Mon, Oct 14, 1996	63.83	65.02	63.83	64.89
911	NASDAQ	CHK	Fri, Oct 11, 1996	64.36	65.15	63.43	63.96
910	NASDAQ	CHK	Thu, Oct 10, 1996	64.49	64.49	61.45	64.36
909	NASDAQ	CHK	Wed, Oct 9, 1996	64.75	65.15	64.09	64.49
908	NASDAQ	CHK	Tue, Oct 8, 1996	67.13	67.66	64.75	64.75
907	NASDAQ	CHK	Mon, Oct 7, 1996	68.06	68.45	66.87	67.13
906	NASDAQ	CHK	Fri, Oct 4, 1996	66.08	69.25	65.68	67.40
905	NASDAQ	CHK	Thu, Oct 3, 1996	65.81	66.47	64.75	65.42
904	NASDAQ	CHK	Wed, Oct 2, 1996	65.42	66.47	65.28	65.68
903	NASDAQ	CHK	Tue, Oct 1, 1996	66.34	67.27	63.17	65.15
902	NASDAQ	CHK	Mon, Sep 30, 1996	66.60	67.66	66.08	66.21
901	NASDAQ	CHK	Fri, Sep 27, 1996	65.02	67.00	64.89	66.34
900	NASDAQ	CHK	Thu, Sep 26, 1996	62.90	65.28	62.90	65.28
899	NASDAQ	CHK	Wed, Sep 25, 1996	61.85	62.77	60.00	62.51
898	NASDAQ	CHK	Tue, Sep 24, 1996	63.96	65.81	61.45	61.85
897	NASDAQ	CHK	Mon, Sep 23, 1996	63.43	67.00	62.11	63.04
896	NASDAQ	CHK	Fri, Sep 20, 1996	62.11	63.57	58.81	63.57
895	NASDAQ	CHK	Thu, Sep 19, 1996	64.75	64.75	61.32	61.98
894	NASDAQ	CHK	Wed, Sep 18, 1996	67.53	67.53	64.89	64.89
893	NASDAQ	CHK	Tue, Sep 17, 1996	67.93	68.85	67.00	67.53
892	NASDAQ	CHK	Mon, Sep 16, 1996	65.94	69.25	65.94	67.40
891	NASDAQ	CHK	Fri, Sep 13, 1996	66.87	69.25	62.90	65.94
890	NASDAQ	CHK	Thu, Sep 12, 1996	69.51	72.42	66.34	66.87
889	NASDAQ	CHK	Wed, Sep 11, 1996	65.42	70.57	65.15	69.51
888	NASDAQ	CHK	Tue, Sep 10, 1996	62.11	67.13	61.98	65.42
887	NASDAQ	CHK	Mon, Sep 9, 1996	61.32	62.90	59.34	62.24
886	NASDAQ	CHK	Fri, Sep 6, 1996	61.32	61.32	60.00	61.05
885	NASDAQ	CHK	Thu, Sep 5, 1996	57.88	61.85	57.88	61.32
884	NASDAQ	CHK	Wed, Sep 4, 1996	58.01	59.34	56.96	58.15
883	NASDAQ	CHK	Tue, Sep 3, 1996	56.83	59.47	56.30	57.62
882	NASDAQ	CHK	Fri, Aug 30, 1996	58.01	58.01	53.65	56.83
881	NASDAQ	CHK	Thu, Aug 29, 1996	60.26	63.43	57.09	57.62
880	NASDAQ	CHK	Wed, Aug 28, 1996	57.62	61.85	57.62	59.20
879	NASDAQ	CHK	Tue, Aug 27, 1996	55.64	60.39	55.37	58.15
878	NASDAQ	CHK	Mon, Aug 26, 1996	53.65	55.64	53.52	54.98
877	NASDAQ	CHK	Fri, Aug 23, 1996	50.22	52.99	50.09	52.20
876	NASDAQ	CHK	Thu, Aug 22, 1996	47.44	51.80	47.44	50.35
875	NASDAQ	CHK	Wed, Aug 21, 1996	47.97	47.97	46.78	47.18
874	NASDAQ	CHK	Tue, Aug 20, 1996	48.76	50.09	48.10	48.10
873	NASDAQ	CHK	Mon, Aug 19, 1996	47.57	48.50	47.57	47.84
872	NASDAQ	CHK	Fri, Aug 16, 1996	47.05	47.18	45.99	46.91
871	NASDAQ	CHK	Thu, Aug 15, 1996	45.20	47.97	45.20	47.05
870	NASDAQ	CHK	Wed, Aug 14, 1996	44.67	46.39	44.01	44.93
869	NASDAQ	CHK	Tue, Aug 13, 1996	47.31	47.97	43.87	44.40
868	NASDAQ	CHK	Mon, Aug 12, 1996	51.28	51.41	46.52	47.31
867	NASDAQ	CHK	Fri, Aug 9, 1996	53.52	53.65	50.75	51.41
866	NASDAQ	CHK	Thu, Aug 8, 1996	54.31	54.31	52.46	53.39
865	NASDAQ	CHK	Wed, Aug 7, 1996	55.90	56.56	54.31	54.58
864	NASDAQ	CHK	Tue, Aug 6, 1996	56.96	56.96	54.31	55.64
863	NASDAQ	CHK	Mon, Aug 5, 1996	58.81	61.19	56.43	56.96
862	NASDAQ	CHK	Fri, Aug 2, 1996	54.58	58.28	53.52	57.88
861	NASDAQ	CHK	Thu, Aug 1, 1996	52.73	55.77	50.22	53.65
860	NASDAQ	CHK	Wed, Jul 31, 1996	53.52	54.71	51.54	52.46
859	NASDAQ	CHK	Tue, Jul 30, 1996	57.09	57.35	53.39	53.39
858	NASDAQ	CHK	Mon, Jul 29, 1996	61.05	61.05	55.90	56.56
857	NASDAQ	CHK	Fri, Jul 26, 1996	57.09	63.17	57.09	61.05
856	NASDAQ	CHK	Thu, Jul 25, 1996	54.71	57.62	54.71	56.69
855	NASDAQ	CHK	Wed, Jul 24, 1996	54.18	57.88	53.26	53.65
854	NASDAQ	CHK	Tue, Jul 23, 1996	61.58	62.64	57.22	57.49
853	NASDAQ	CHK	Mon, Jul 22, 1996	65.15	65.15	61.32	61.85
852	NASDAQ	CHK	Fri, Jul 19, 1996	67.13	67.13	64.89	65.42
851	NASDAQ	CHK	Thu, Jul 18, 1996	64.62	67.40	63.70	67.13
850	NASDAQ	CHK	Wed, Jul 17, 1996	67.53	69.91	62.64	64.75
849	NASDAQ	CHK	Tue, Jul 16, 1996	71.63	71.63	57.62	67.40
848	NASDAQ	CHK	Mon, Jul 15, 1996	71.36	74.27	69.38	71.89
847	NASDAQ	CHK	Fri, Jul 12, 1996	68.06	71.23	68.06	70.97
846	NASDAQ	CHK	Thu, Jul 11, 1996	67.79	68.98	63.96	68.06
845	NASDAQ	CHK	Wed, Jul 10, 1996	65.55	67.79	65.28	67.13
844	NASDAQ	CHK	Tue, Jul 9, 1996	65.28	65.55	64.36	65.28
843	NASDAQ	CHK	Mon, Jul 8, 1996	64.89	66.08	63.57	65.15
842	NASDAQ	CHK	Fri, Jul 5, 1996	65.81	66.47	64.23	65.28
841	NASDAQ	CHK	Wed, Jul 3, 1996	68.19	68.59	64.75	65.81
840	NASDAQ	CHK	Tue, Jul 2, 1996	65.28	70.57	65.15	67.93
839	NASDAQ	CHK	Mon, Jul 1, 1996	62.90	65.15	61.85	64.75
838	NASDAQ	CHK	Fri, Jun 28, 1996	91.72	96.34	91.72	95.02
837	NASDAQ	CHK	Thu, Jun 27, 1996	88.81	93.83	88.41	91.45
836	NASDAQ	CHK	Wed, Jun 26, 1996	86.83	88.81	86.70	88.28
835	NASDAQ	CHK	Tue, Jun 25, 1996	86.04	87.49	86.04	86.96
834	NASDAQ	CHK	Mon, Jun 24, 1996	84.45	86.43	84.19	85.90
833	NASDAQ	CHK	Fri, Jun 21, 1996	81.01	85.90	81.01	84.32
832	NASDAQ	CHK	Thu, Jun 20, 1996	78.50	81.28	78.37	80.88
831	NASDAQ	CHK	Wed, Jun 19, 1996	81.94	81.94	76.52	78.77
830	NASDAQ	CHK	Tue, Jun 18, 1996	85.51	85.51	81.01	81.54
829	NASDAQ	CHK	Mon, Jun 17, 1996	88.15	88.28	86.17	86.43
828	NASDAQ	CHK	Fri, Jun 14, 1996	91.32	91.72	87.36	87.89
827	NASDAQ	CHK	Thu, Jun 13, 1996	92.51	92.51	91.32	91.32
826	NASDAQ	CHK	Wed, Jun 12, 1996	90.93	92.78	90.53	92.38
825	NASDAQ	CHK	Tue, Jun 11, 1996	89.87	91.72	88.28	90.93
824	NASDAQ	CHK	Mon, Jun 10, 1996	87.23	90.93	87.09	89.87
823	NASDAQ	CHK	Fri, Jun 7, 1996	85.11	86.70	84.58	86.30
822	NASDAQ	CHK	Thu, Jun 6, 1996	87.09	87.23	83.92	85.90
821	NASDAQ	CHK	Wed, Jun 5, 1996	86.70	88.94	86.04	86.96
820	NASDAQ	CHK	Tue, Jun 4, 1996	83.39	85.77	83.13	84.85
819	NASDAQ	CHK	Mon, Jun 3, 1996	80.22	83.52	80.22	83.13
818	NASDAQ	CHK	Fri, May 31, 1996	78.50	81.15	78.24	81.15
817	NASDAQ	CHK	Thu, May 30, 1996	77.97	78.63	77.58	78.24
816	NASDAQ	CHK	Wed, May 29, 1996	79.56	79.56	77.58	78.24
815	NASDAQ	CHK	Tue, May 28, 1996	79.16	80.09	79.03	79.96
814	NASDAQ	CHK	Fri, May 24, 1996	77.58	80.22	77.58	79.03
813	NASDAQ	CHK	Thu, May 23, 1996	74.67	77.18	74.54	77.18
812	NASDAQ	CHK	Wed, May 22, 1996	74.01	75.07	73.35	74.93
811	NASDAQ	CHK	Tue, May 21, 1996	74.41	74.80	74.27	74.27
810	NASDAQ	CHK	Mon, May 20, 1996	75.07	75.20	72.42	74.14
809	NASDAQ	CHK	Fri, May 17, 1996	75.07	75.86	74.80	75.46
808	NASDAQ	CHK	Thu, May 16, 1996	72.82	75.07	72.56	74.80
807	NASDAQ	CHK	Wed, May 15, 1996	71.23	73.48	71.10	73.08
806	NASDAQ	CHK	Tue, May 14, 1996	71.89	72.82	70.84	71.23
805	NASDAQ	CHK	Mon, May 13, 1996	69.52	72.03	68.85	71.76
804	NASDAQ	CHK	Fri, May 10, 1996	69.52	70.71	68.19	68.59
803	NASDAQ	CHK	Thu, May 9, 1996	66.21	70.44	66.21	69.78
802	NASDAQ	CHK	Wed, May 8, 1996	66.87	66.87	63.17	65.95
801	NASDAQ	CHK	Tue, May 7, 1996	70.04	70.04	66.34	66.87
800	NASDAQ	CHK	Mon, May 6, 1996	73.08	73.22	70.31	70.71
799	NASDAQ	CHK	Fri, May 3, 1996	73.61	73.74	72.56	73.22
798	NASDAQ	CHK	Thu, May 2, 1996	75.46	75.46	73.61	73.74
797	NASDAQ	CHK	Wed, May 1, 1996	73.88	74.41	71.76	73.61
796	NASDAQ	CHK	Tue, Apr 30, 1996	72.03	74.93	71.89	74.80
795	NASDAQ	CHK	Mon, Apr 29, 1996	71.37	72.29	71.23	72.03
794	NASDAQ	CHK	Fri, Apr 26, 1996	72.95	72.95	70.84	71.10
793	NASDAQ	CHK	Thu, Apr 25, 1996	72.56	72.82	69.25	72.82
792	NASDAQ	CHK	Wed, Apr 24, 1996	71.23	73.08	71.23	72.56
791	NASDAQ	CHK	Tue, Apr 23, 1996	67.27	71.89	67.27	71.23
790	NASDAQ	CHK	Mon, Apr 22, 1996	64.63	67.53	64.63	67.53
789	NASDAQ	CHK	Fri, Apr 19, 1996	65.02	65.02	63.97	64.63
788	NASDAQ	CHK	Thu, Apr 18, 1996	65.02	65.82	64.76	65.02
787	NASDAQ	CHK	Wed, Apr 17, 1996	66.87	67.27	64.63	65.29
786	NASDAQ	CHK	Tue, Apr 16, 1996	66.61	67.80	66.21	66.61
785	NASDAQ	CHK	Mon, Apr 15, 1996	61.45	68.46	61.32	64.63
784	NASDAQ	CHK	Fri, Apr 12, 1996	61.98	61.98	60.53	61.59
783	NASDAQ	CHK	Thu, Apr 11, 1996	59.21	62.25	59.21	61.98
782	NASDAQ	CHK	Wed, Apr 10, 1996	56.70	58.68	55.90	58.68
781	NASDAQ	CHK	Tue, Apr 9, 1996	58.94	60.53	56.70	56.83
780	NASDAQ	CHK	Mon, Apr 8, 1996	55.77	58.15	55.11	57.62
779	NASDAQ	CHK	Thu, Apr 4, 1996	56.70	56.70	55.24	56.04
778	NASDAQ	CHK	Wed, Apr 3, 1996	53.39	56.96	53.26	56.04
777	NASDAQ	CHK	Tue, Apr 2, 1996	51.01	53.79	50.88	53.26
776	NASDAQ	CHK	Mon, Apr 1, 1996	49.16	52.34	49.16	51.54
775	NASDAQ	CHK	Fri, Mar 29, 1996	49.16	49.16	48.77	48.90
774	NASDAQ	CHK	Thu, Mar 28, 1996	49.56	49.69	49.30	49.43
773	NASDAQ	CHK	Wed, Mar 27, 1996	49.43	49.69	49.16	49.43
772	NASDAQ	CHK	Tue, Mar 26, 1996	50.09	50.35	49.16	49.30
771	NASDAQ	CHK	Mon, Mar 25, 1996	50.62	50.75	48.50	49.56
770	NASDAQ	CHK	Fri, Mar 22, 1996	48.90	50.48	48.90	50.35
769	NASDAQ	CHK	Thu, Mar 21, 1996	45.86	48.63	45.33	48.63
768	NASDAQ	CHK	Wed, Mar 20, 1996	45.07	46.26	43.88	45.73
767	NASDAQ	CHK	Tue, Mar 19, 1996	44.27	46.39	44.27	45.07
766	NASDAQ	CHK	Mon, Mar 18, 1996	45.59	45.73	43.74	44.14
765	NASDAQ	CHK	Fri, Mar 15, 1996	46.26	46.65	45.07	45.07
764	NASDAQ	CHK	Thu, Mar 14, 1996	44.54	46.26	44.54	45.73
763	NASDAQ	CHK	Wed, Mar 13, 1996	43.74	44.41	43.08	44.41
762	NASDAQ	CHK	Tue, Mar 12, 1996	44.93	44.93	43.48	43.74
761	NASDAQ	CHK	Mon, Mar 11, 1996	43.61	45.20	43.35	44.80
760	NASDAQ	CHK	Fri, Mar 8, 1996	44.80	44.93	43.08	43.35
759	NASDAQ	CHK	Thu, Mar 7, 1996	45.99	46.26	44.93	45.07
758	NASDAQ	CHK	Wed, Mar 6, 1996	45.59	46.78	45.07	45.20
757	NASDAQ	CHK	Tue, Mar 5, 1996	43.48	45.33	43.22	45.07
756	NASDAQ	CHK	Mon, Mar 4, 1996	43.22	44.41	43.22	43.48
755	NASDAQ	CHK	Fri, Mar 1, 1996	44.14	44.54	42.82	43.22
754	NASDAQ	CHK	Thu, Feb 29, 1996	42.03	44.14	42.03	43.74
753	NASDAQ	CHK	Wed, Feb 28, 1996	40.18	42.29	40.18	42.29
752	NASDAQ	CHK	Tue, Feb 27, 1996	40.70	40.70	39.52	39.78
751	NASDAQ	CHK	Mon, Feb 26, 1996	42.42	42.69	40.70	40.70
750	NASDAQ	CHK	Fri, Feb 23, 1996	41.23	42.95	41.23	42.29
749	NASDAQ	CHK	Thu, Feb 22, 1996	43.22	43.22	40.97	41.50
748	NASDAQ	CHK	Wed, Feb 21, 1996	43.22	43.35	42.03	42.82
747	NASDAQ	CHK	Tue, Feb 20, 1996	42.56	43.48	41.89	43.22
746	NASDAQ	CHK	Fri, Feb 16, 1996	43.74	44.01	42.95	43.08
745	NASDAQ	CHK	Thu, Feb 15, 1996	43.74	44.27	43.48	43.61
744	NASDAQ	CHK	Wed, Feb 14, 1996	43.88	44.14	43.74	44.01
743	NASDAQ	CHK	Tue, Feb 13, 1996	44.67	44.67	43.22	43.88
742	NASDAQ	CHK	Mon, Feb 12, 1996	45.73	46.26	44.67	44.80
741	NASDAQ	CHK	Fri, Feb 9, 1996	44.41	46.52	44.41	45.07
740	NASDAQ	CHK	Thu, Feb 8, 1996	43.35	45.73	43.35	44.41
739	NASDAQ	CHK	Wed, Feb 7, 1996	42.29	43.22	41.23	43.08
738	NASDAQ	CHK	Tue, Feb 6, 1996	44.41	44.41	41.23	42.29
737	NASDAQ	CHK	Mon, Feb 5, 1996	45.46	46.39	44.41	44.67
736	NASDAQ	CHK	Fri, Feb 2, 1996	44.14	47.05	44.14	45.99
735	NASDAQ	CHK	Thu, Feb 1, 1996	48.63	48.63	44.14	44.41
734	NASDAQ	CHK	Wed, Jan 31, 1996	51.94	52.07	48.90	48.90
733	NASDAQ	CHK	Tue, Jan 30, 1996	49.56	52.34	49.43	51.67
732	NASDAQ	CHK	Mon, Jan 29, 1996	46.52	49.69	46.12	49.56
731	NASDAQ	CHK	Fri, Jan 26, 1996	45.99	48.11	45.99	46.39
730	NASDAQ	CHK	Thu, Jan 25, 1996	43.88	46.26	43.61	45.20
729	NASDAQ	CHK	Wed, Jan 24, 1996	41.89	43.61	41.89	43.35
728	NASDAQ	CHK	Tue, Jan 23, 1996	39.65	43.22	39.65	41.89
727	NASDAQ	CHK	Mon, Jan 22, 1996	38.06	41.23	37.93	39.52
726	NASDAQ	CHK	Fri, Jan 19, 1996	36.87	39.52	36.87	38.19
725	NASDAQ	CHK	Thu, Jan 18, 1996	34.89	37.53	34.76	36.61
724	NASDAQ	CHK	Wed, Jan 17, 1996	34.89	34.89	34.23	34.89
723	NASDAQ	CHK	Tue, Jan 16, 1996	37.14	37.53	33.83	35.02
722	NASDAQ	CHK	Mon, Jan 15, 1996	37.93	37.93	37.00	37.00
721	NASDAQ	CHK	Fri, Jan 12, 1996	36.08	38.46	36.08	37.80
720	NASDAQ	CHK	Thu, Jan 11, 1996	35.55	36.61	35.55	35.95
719	NASDAQ	CHK	Wed, Jan 10, 1996	36.08	36.21	35.68	35.82
718	NASDAQ	CHK	Tue, Jan 9, 1996	37.14	37.27	35.82	36.21
717	NASDAQ	CHK	Mon, Jan 8, 1996	36.87	37.67	36.74	37.14
716	NASDAQ	CHK	Fri, Jan 5, 1996	35.68	37.27	35.68	36.74
715	NASDAQ	CHK	Thu, Jan 4, 1996	34.89	35.68	34.89	35.68
714	NASDAQ	CHK	Wed, Jan 3, 1996	34.63	35.29	34.63	34.89
713	NASDAQ	CHK	Tue, Jan 2, 1996	34.89	35.29	34.23	34.36
712	NASDAQ	CHK	Fri, Dec 29, 1995	33.57	35.15	33.30	35.15
711	NASDAQ	CHK	Thu, Dec 28, 1995	49.69	49.96	49.03	49.96
710	NASDAQ	CHK	Wed, Dec 27, 1995	49.17	49.69	48.90	49.69
709	NASDAQ	CHK	Tue, Dec 26, 1995	48.24	49.56	48.24	49.17
708	NASDAQ	CHK	Fri, Dec 22, 1995	49.56	49.69	47.58	48.24
707	NASDAQ	CHK	Thu, Dec 21, 1995	51.02	51.02	49.03	49.30
706	NASDAQ	CHK	Wed, Dec 20, 1995	47.58	51.28	47.58	51.02
705	NASDAQ	CHK	Tue, Dec 19, 1995	47.05	47.45	46.52	47.45
704	NASDAQ	CHK	Mon, Dec 18, 1995	46.39	47.45	46.39	46.92
703	NASDAQ	CHK	Fri, Dec 15, 1995	44.67	46.52	44.14	46.26
702	NASDAQ	CHK	Thu, Dec 14, 1995	49.17	49.17	43.22	44.94
701	NASDAQ	CHK	Wed, Dec 13, 1995	50.49	50.49	49.30	49.30
700	NASDAQ	CHK	Tue, Dec 12, 1995	49.43	51.54	49.43	50.49
699	NASDAQ	CHK	Mon, Dec 11, 1995	46.39	49.17	46.39	49.17
698	NASDAQ	CHK	Fri, Dec 8, 1995	46.26	46.39	45.73	46.13
697	NASDAQ	CHK	Thu, Dec 7, 1995	47.18	47.18	46.13	46.65
696	NASDAQ	CHK	Wed, Dec 6, 1995	47.58	47.58	47.05	47.18
695	NASDAQ	CHK	Tue, Dec 5, 1995	48.90	48.90	47.58	47.58
694	NASDAQ	CHK	Mon, Dec 4, 1995	47.05	49.56	46.92	48.90
693	NASDAQ	CHK	Fri, Dec 1, 1995	44.80	47.18	44.41	46.79
692	NASDAQ	CHK	Thu, Nov 30, 1995	43.61	45.47	43.35	44.94
691	NASDAQ	CHK	Wed, Nov 29, 1995	41.24	43.75	41.24	43.61
690	NASDAQ	CHK	Tue, Nov 28, 1995	40.05	41.63	40.05	41.24
689	NASDAQ	CHK	Mon, Nov 27, 1995	38.99	40.05	38.99	40.05
688	NASDAQ	CHK	Fri, Nov 24, 1995	38.59	38.86	38.59	38.86
687	NASDAQ	CHK	Wed, Nov 22, 1995	38.06	38.99	38.06	38.46
686	NASDAQ	CHK	Tue, Nov 21, 1995	40.18	40.31	37.40	38.33
685	NASDAQ	CHK	Mon, Nov 20, 1995	38.46	40.18	38.33	40.05
684	NASDAQ	CHK	Fri, Nov 17, 1995	38.20	38.46	37.80	38.46
683	NASDAQ	CHK	Thu, Nov 16, 1995	36.08	39.39	35.68	37.93
682	NASDAQ	CHK	Wed, Nov 15, 1995	33.83	36.74	33.83	36.35
681	NASDAQ	CHK	Tue, Nov 14, 1995	31.98	33.70	31.98	33.57
680	NASDAQ	CHK	Mon, Nov 13, 1995	31.59	31.85	31.59	31.85
679	NASDAQ	CHK	Fri, Nov 10, 1995	31.59	31.85	31.59	31.59
678	NASDAQ	CHK	Thu, Nov 9, 1995	30.66	31.98	30.66	31.72
677	NASDAQ	CHK	Wed, Nov 8, 1995	31.06	31.19	30.53	30.79
676	NASDAQ	CHK	Tue, Nov 7, 1995	31.59	31.59	30.93	30.93
675	NASDAQ	CHK	Mon, Nov 6, 1995	31.85	31.98	31.19	31.59
674	NASDAQ	CHK	Fri, Nov 3, 1995	30.79	32.12	30.79	32.12
673	NASDAQ	CHK	Thu, Nov 2, 1995	29.87	31.06	29.87	30.93
672	NASDAQ	CHK	Wed, Nov 1, 1995	30.40	30.40	29.47	29.61
671	NASDAQ	CHK	Tue, Oct 31, 1995	31.98	32.64	30.93	30.93
670	NASDAQ	CHK	Mon, Oct 30, 1995	31.19	31.85	31.19	31.72
669	NASDAQ	CHK	Fri, Oct 27, 1995	31.85	31.85	30.93	31.46
668	NASDAQ	CHK	Thu, Oct 26, 1995	31.06	32.25	31.06	32.12
667	NASDAQ	CHK	Wed, Oct 25, 1995	30.79	31.32	30.79	31.19
666	NASDAQ	CHK	Tue, Oct 24, 1995	31.46	31.46	30.66	30.79
665	NASDAQ	CHK	Mon, Oct 23, 1995	31.32	32.25	31.19	31.32
664	NASDAQ	CHK	Fri, Oct 20, 1995	32.38	32.38	31.32	31.46
663	NASDAQ	CHK	Thu, Oct 19, 1995	33.70	33.70	32.51	32.51
662	NASDAQ	CHK	Wed, Oct 18, 1995	33.44	34.23	33.44	33.97
661	NASDAQ	CHK	Tue, Oct 17, 1995	33.31	33.70	33.31	33.57
660	NASDAQ	CHK	Mon, Oct 16, 1995	33.31	33.57	33.17	33.31
659	NASDAQ	CHK	Fri, Oct 13, 1995	33.04	33.31	33.04	33.31
658	NASDAQ	CHK	Thu, Oct 12, 1995	32.12	33.17	31.98	33.17
657	NASDAQ	CHK	Wed, Oct 11, 1995	30.93	31.98	30.93	31.98
656	NASDAQ	CHK	Tue, Oct 10, 1995	31.72	31.72	30.79	30.79
655	NASDAQ	CHK	Mon, Oct 9, 1995	34.76	34.76	32.64	32.64
654	NASDAQ	CHK	Fri, Oct 6, 1995	36.08	36.21	34.63	34.76
653	NASDAQ	CHK	Thu, Oct 5, 1995	33.97	37.01	33.97	36.48
652	NASDAQ	CHK	Wed, Oct 4, 1995	33.70	33.97	33.70	33.83
651	NASDAQ	CHK	Tue, Oct 3, 1995	33.57	34.50	33.57	33.70
650	NASDAQ	CHK	Mon, Oct 2, 1995	33.57	33.57	33.31	33.57
649	NASDAQ	CHK	Fri, Sep 29, 1995	33.17	33.44	33.04	33.44
648	NASDAQ	CHK	Thu, Sep 28, 1995	32.64	33.17	32.64	33.04
647	NASDAQ	CHK	Wed, Sep 27, 1995	32.91	32.91	32.12	32.64
646	NASDAQ	CHK	Tue, Sep 26, 1995	33.70	34.23	32.91	33.04
645	NASDAQ	CHK	Mon, Sep 25, 1995	33.83	34.10	33.70	33.83
644	NASDAQ	CHK	Fri, Sep 22, 1995	34.36	34.36	33.17	33.83
643	NASDAQ	CHK	Thu, Sep 21, 1995	32.64	34.63	32.64	34.63
642	NASDAQ	CHK	Wed, Sep 20, 1995	32.51	32.64	32.38	32.64
641	NASDAQ	CHK	Tue, Sep 19, 1995	32.78	33.04	32.51	32.51
640	NASDAQ	CHK	Mon, Sep 18, 1995	31.59	32.64	31.59	32.64
639	NASDAQ	CHK	Fri, Sep 15, 1995	31.19	31.32	30.79	31.32
638	NASDAQ	CHK	Thu, Sep 14, 1995	31.46	31.59	31.06	31.06
637	NASDAQ	CHK	Wed, Sep 13, 1995	30.79	31.85	30.66	31.59
636	NASDAQ	CHK	Tue, Sep 12, 1995	30.93	31.06	30.79	30.93
635	NASDAQ	CHK	Mon, Sep 11, 1995	30.53	31.06	30.27	31.06
634	NASDAQ	CHK	Fri, Sep 8, 1995	29.61	31.06	29.61	30.66
633	NASDAQ	CHK	Thu, Sep 7, 1995	29.34	29.34	28.68	29.34
632	NASDAQ	CHK	Wed, Sep 6, 1995	29.47	29.61	29.21	29.34
631	NASDAQ	CHK	Tue, Sep 5, 1995	28.28	29.61	28.15	29.21
630	NASDAQ	CHK	Fri, Sep 1, 1995	26.96	28.28	26.96	28.02
629	NASDAQ	CHK	Thu, Aug 31, 1995	25.24	26.96	25.24	26.96
628	NASDAQ	CHK	Wed, Aug 30, 1995	25.24	25.38	25.24	25.38
627	NASDAQ	CHK	Tue, Aug 29, 1995	25.90	26.04	25.11	25.24
626	NASDAQ	CHK	Mon, Aug 28, 1995	27.09	27.23	26.17	26.17
625	NASDAQ	CHK	Fri, Aug 25, 1995	26.57	27.09	26.57	26.83
624	NASDAQ	CHK	Thu, Aug 24, 1995	26.96	27.09	25.38	26.04
623	NASDAQ	CHK	Wed, Aug 23, 1995	27.36	27.75	26.70	26.70
622	NASDAQ	CHK	Tue, Aug 22, 1995	26.17	27.23	26.17	27.23
621	NASDAQ	CHK	Mon, Aug 21, 1995	26.96	26.96	26.17	26.30
620	NASDAQ	CHK	Fri, Aug 18, 1995	27.89	27.89	27.23	27.23
619	NASDAQ	CHK	Thu, Aug 17, 1995	27.36	27.89	27.36	27.89
618	NASDAQ	CHK	Wed, Aug 16, 1995	26.70	27.36	26.70	27.36
617	NASDAQ	CHK	Tue, Aug 15, 1995	26.30	27.23	26.30	26.96
616	NASDAQ	CHK	Mon, Aug 14, 1995	25.64	26.57	25.64	26.30
615	NASDAQ	CHK	Fri, Aug 11, 1995	24.19	25.64	24.19	25.64
614	NASDAQ	CHK	Thu, Aug 10, 1995	23.26	24.19	23.13	24.05
613	NASDAQ	CHK	Wed, Aug 9, 1995	23.13	23.39	23.13	23.26
612	NASDAQ	CHK	Tue, Aug 8, 1995	23.26	23.39	23.13	23.39
611	NASDAQ	CHK	Mon, Aug 7, 1995	23.39	23.53	23.26	23.26
610	NASDAQ	CHK	Fri, Aug 4, 1995	23.92	23.92	23.39	23.39
609	NASDAQ	CHK	Thu, Aug 3, 1995	23.79	23.92	23.66	23.92
608	NASDAQ	CHK	Wed, Aug 2, 1995	24.05	24.19	23.79	23.79
607	NASDAQ	CHK	Tue, Aug 1, 1995	24.05	24.19	23.79	24.19
606	NASDAQ	CHK	Mon, Jul 31, 1995	24.32	24.32	24.05	24.19
605	NASDAQ	CHK	Fri, Jul 28, 1995	24.19	24.32	23.53	24.32
604	NASDAQ	CHK	Thu, Jul 27, 1995	24.32	24.32	23.92	24.05
603	NASDAQ	CHK	Wed, Jul 26, 1995	24.32	24.45	24.05	24.32
602	NASDAQ	CHK	Tue, Jul 25, 1995	23.66	24.58	23.66	24.32
601	NASDAQ	CHK	Mon, Jul 24, 1995	23.92	23.92	23.26	23.79
600	NASDAQ	CHK	Fri, Jul 21, 1995	24.19	24.19	23.92	24.05
599	NASDAQ	CHK	Thu, Jul 20, 1995	24.05	24.32	23.92	24.32
598	NASDAQ	CHK	Wed, Jul 19, 1995	24.32	24.45	23.53	23.66
597	NASDAQ	CHK	Tue, Jul 18, 1995	23.66	24.98	23.53	24.19
596	NASDAQ	CHK	Mon, Jul 17, 1995	21.94	23.26	21.41	23.26
595	NASDAQ	CHK	Fri, Jul 14, 1995	21.68	22.47	21.54	22.20
594	NASDAQ	CHK	Thu, Jul 13, 1995	24.32	24.32	23.13	23.39
593	NASDAQ	CHK	Wed, Jul 12, 1995	24.32	24.58	24.32	24.45
592	NASDAQ	CHK	Tue, Jul 11, 1995	23.79	24.71	23.53	24.45
591	NASDAQ	CHK	Mon, Jul 10, 1995	24.98	24.98	23.92	24.05
590	NASDAQ	CHK	Fri, Jul 7, 1995	24.05	24.85	24.05	24.32
589	NASDAQ	CHK	Thu, Jul 6, 1995	26.04	26.04	23.53	24.19
588	NASDAQ	CHK	Wed, Jul 5, 1995	26.83	27.09	25.77	26.17
587	NASDAQ	CHK	Mon, Jul 3, 1995	27.09	27.23	26.57	26.57
586	NASDAQ	CHK	Fri, Jun 30, 1995	27.62	27.62	26.43	27.23
585	NASDAQ	CHK	Thu, Jun 29, 1995	27.49	27.75	27.49	27.49
584	NASDAQ	CHK	Wed, Jun 28, 1995	26.96	27.49	26.70	27.49
583	NASDAQ	CHK	Tue, Jun 27, 1995	26.17	26.96	26.04	26.96
582	NASDAQ	CHK	Mon, Jun 26, 1995	26.17	26.17	25.90	26.04
581	NASDAQ	CHK	Fri, Jun 23, 1995	26.17	26.57	25.38	26.43
580	NASDAQ	CHK	Thu, Jun 22, 1995	26.96	27.23	26.17	26.30
579	NASDAQ	CHK	Wed, Jun 21, 1995	27.23	27.23	25.77	26.83
578	NASDAQ	CHK	Tue, Jun 20, 1995	29.08	29.08	27.89	28.15
577	NASDAQ	CHK	Mon, Jun 19, 1995	29.47	29.47	28.55	29.21
576	NASDAQ	CHK	Fri, Jun 16, 1995	30.13	30.27	29.47	29.61
575	NASDAQ	CHK	Thu, Jun 15, 1995	29.61	30.00	29.08	29.87
574	NASDAQ	CHK	Wed, Jun 14, 1995	30.00	30.40	29.47	29.47
573	NASDAQ	CHK	Tue, Jun 13, 1995	27.62	29.74	27.62	29.61
572	NASDAQ	CHK	Mon, Jun 12, 1995	25.90	27.09	25.77	27.09
571	NASDAQ	CHK	Fri, Jun 9, 1995	26.70	26.70	26.17	26.17
570	NASDAQ	CHK	Thu, Jun 8, 1995	26.70	26.83	26.57	26.70
569	NASDAQ	CHK	Wed, Jun 7, 1995	27.09	27.23	26.43	26.83
568	NASDAQ	CHK	Tue, Jun 6, 1995	27.23	27.36	27.09	27.09
567	NASDAQ	CHK	Mon, Jun 5, 1995	27.49	27.49	26.96	27.36
566	NASDAQ	CHK	Fri, Jun 2, 1995	27.75	27.75	26.83	27.49
565	NASDAQ	CHK	Thu, Jun 1, 1995	28.68	28.68	26.57	27.62
564	NASDAQ	CHK	Wed, May 31, 1995	28.55	28.68	28.55	28.68
563	NASDAQ	CHK	Tue, May 30, 1995	29.34	29.34	28.55	28.68
562	NASDAQ	CHK	Fri, May 26, 1995	30.00	30.00	29.34	29.34
561	NASDAQ	CHK	Thu, May 25, 1995	30.40	30.40	30.00	30.13
560	NASDAQ	CHK	Wed, May 24, 1995	31.32	31.32	30.40	30.53
559	NASDAQ	CHK	Tue, May 23, 1995	30.66	31.85	30.66	31.06
558	NASDAQ	CHK	Mon, May 22, 1995	29.74	30.79	29.74	30.53
557	NASDAQ	CHK	Fri, May 19, 1995	29.08	29.74	28.94	29.74
556	NASDAQ	CHK	Thu, May 18, 1995	28.55	29.34	28.55	29.21
555	NASDAQ	CHK	Wed, May 17, 1995	29.61	29.87	28.81	28.81
554	NASDAQ	CHK	Tue, May 16, 1995	29.47	29.47	28.28	29.47
553	NASDAQ	CHK	Mon, May 15, 1995	29.61	29.61	28.94	29.47
552	NASDAQ	CHK	Fri, May 12, 1995	28.28	30.00	28.28	29.74
551	NASDAQ	CHK	Thu, May 11, 1995	28.02	28.15	26.30	27.49
550	NASDAQ	CHK	Wed, May 10, 1995	27.75	28.15	27.49	28.15
549	NASDAQ	CHK	Tue, May 9, 1995	28.02	28.42	27.75	27.89
548	NASDAQ	CHK	Mon, May 8, 1995	27.62	28.02	27.49	28.02
547	NASDAQ	CHK	Fri, May 5, 1995	26.57	28.02	26.57	27.89
546	NASDAQ	CHK	Thu, May 4, 1995	24.85	26.57	24.85	26.57
545	NASDAQ	CHK	Wed, May 3, 1995	25.11	25.24	24.85	25.11
544	NASDAQ	CHK	Tue, May 2, 1995	26.04	26.17	24.98	24.98
543	NASDAQ	CHK	Mon, May 1, 1995	25.64	27.49	25.64	26.96
542	NASDAQ	CHK	Fri, Apr 28, 1995	25.64	25.90	25.51	25.64
541	NASDAQ	CHK	Thu, Apr 27, 1995	22.73	25.38	22.47	25.38
540	NASDAQ	CHK	Wed, Apr 26, 1995	27.49	27.75	22.73	23.39
539	NASDAQ	CHK	Tue, Apr 25, 1995	29.34	29.61	27.75	27.75
538	NASDAQ	CHK	Mon, Apr 24, 1995	27.49	30.13	27.23	29.61
537	NASDAQ	CHK	Fri, Apr 21, 1995	27.23	28.15	27.23	27.75
536	NASDAQ	CHK	Thu, Apr 20, 1995	27.49	28.55	27.23	27.49
535	NASDAQ	CHK	Wed, Apr 19, 1995	25.38	27.49	25.38	27.23
534	NASDAQ	CHK	Tue, Apr 18, 1995	24.85	26.43	24.32	25.38
533	NASDAQ	CHK	Mon, Apr 17, 1995	23.79	25.11	23.53	24.58
532	NASDAQ	CHK	Thu, Apr 13, 1995	25.11	25.90	22.73	23.53
531	NASDAQ	CHK	Wed, Apr 12, 1995	25.64	26.70	24.85	25.24
530	NASDAQ	CHK	Tue, Apr 11, 1995	24.32	25.38	24.32	25.38
529	NASDAQ	CHK	Mon, Apr 10, 1995	24.05	24.85	23.79	24.32
528	NASDAQ	CHK	Fri, Apr 7, 1995	24.58	24.58	24.05	24.32
527	NASDAQ	CHK	Thu, Apr 6, 1995	23.79	24.58	23.26	24.05
526	NASDAQ	CHK	Wed, Apr 5, 1995	22.20	23.79	22.20	23.79
525	NASDAQ	CHK	Tue, Apr 4, 1995	22.47	23.00	22.20	22.20
524	NASDAQ	CHK	Mon, Apr 3, 1995	22.47	23.00	22.20	23.00
523	NASDAQ	CHK	Fri, Mar 31, 1995	22.47	23.00	22.47	22.47
522	NASDAQ	CHK	Thu, Mar 30, 1995	20.88	23.00	20.88	23.00
521	NASDAQ	CHK	Wed, Mar 29, 1995	20.35	21.41	19.82	21.15
520	NASDAQ	CHK	Tue, Mar 28, 1995	19.56	20.35	19.56	19.82
519	NASDAQ	CHK	Mon, Mar 27, 1995	19.82	20.09	19.30	19.56
518	NASDAQ	CHK	Fri, Mar 24, 1995	18.50	19.82	18.50	19.43
517	NASDAQ	CHK	Thu, Mar 23, 1995	19.82	20.09	18.77	19.03
516	NASDAQ	CHK	Wed, Mar 22, 1995	20.09	20.35	19.56	20.09
515	NASDAQ	CHK	Tue, Mar 21, 1995	20.09	20.88	20.09	20.35
514	NASDAQ	CHK	Mon, Mar 20, 1995	20.09	20.35	19.56	20.22
513	NASDAQ	CHK	Fri, Mar 17, 1995	19.56	20.88	19.03	19.30
512	NASDAQ	CHK	Thu, Mar 16, 1995	18.77	19.56	18.50	19.43
511	NASDAQ	CHK	Wed, Mar 15, 1995	17.45	18.77	17.18	18.77
510	NASDAQ	CHK	Tue, Mar 14, 1995	16.92	17.45	16.92	17.18
509	NASDAQ	CHK	Mon, Mar 13, 1995	17.45	17.45	16.92	17.05
508	NASDAQ	CHK	Fri, Mar 10, 1995	16.39	17.45	16.39	16.92
507	NASDAQ	CHK	Thu, Mar 9, 1995	16.12	16.65	15.60	16.39
506	NASDAQ	CHK	Wed, Mar 8, 1995	16.65	16.65	15.60	16.12
505	NASDAQ	CHK	Tue, Mar 7, 1995	16.12	16.65	16.12	16.65
504	NASDAQ	CHK	Mon, Mar 6, 1995	16.12	16.92	15.86	16.12
503	NASDAQ	CHK	Fri, Mar 3, 1995	16.92	16.92	16.12	16.12
502	NASDAQ	CHK	Thu, Mar 2, 1995	16.39	16.92	16.39	16.65
501	NASDAQ	CHK	Wed, Mar 1, 1995	16.39	16.92	16.39	16.65
500	NASDAQ	CHK	Tue, Feb 28, 1995	16.39	16.92	16.39	16.65
499	NASDAQ	CHK	Mon, Feb 27, 1995	16.12	16.92	16.12	16.52
498	NASDAQ	CHK	Fri, Feb 24, 1995	15.86	16.65	15.86	16.39
497	NASDAQ	CHK	Thu, Feb 23, 1995	16.39	16.39	15.86	16.39
496	NASDAQ	CHK	Wed, Feb 22, 1995	15.86	16.39	15.86	15.86
495	NASDAQ	CHK	Tue, Feb 21, 1995	16.65	16.65	15.86	15.86
494	NASDAQ	CHK	Fri, Feb 17, 1995	15.86	16.65	15.33	16.26
493	NASDAQ	CHK	Thu, Feb 16, 1995	15.33	15.86	15.33	15.86
492	NASDAQ	CHK	Wed, Feb 15, 1995	14.54	15.86	14.01	15.60
491	NASDAQ	CHK	Tue, Feb 14, 1995	15.07	15.07	13.75	14.54
490	NASDAQ	CHK	Mon, Feb 13, 1995	14.01	14.27	13.75	14.13
489	NASDAQ	CHK	Fri, Feb 10, 1995	12.95	14.01	12.95	13.48
488	NASDAQ	CHK	Thu, Feb 9, 1995	12.82	13.48	12.56	13.48
487	NASDAQ	CHK	Wed, Feb 8, 1995	12.69	12.95	12.16	12.82
486	NASDAQ	CHK	Tue, Feb 7, 1995	12.95	12.95	11.89	12.42
485	NASDAQ	CHK	Mon, Feb 6, 1995	13.48	13.48	12.42	12.95
484	NASDAQ	CHK	Fri, Feb 3, 1995	14.01	14.01	12.69	13.48
483	NASDAQ	CHK	Thu, Feb 2, 1995	14.01	14.01	13.22	13.75
482	NASDAQ	CHK	Wed, Feb 1, 1995	12.95	14.01	12.95	13.88
481	NASDAQ	CHK	Tue, Jan 31, 1995	13.22	13.75	12.95	12.95
480	NASDAQ	CHK	Mon, Jan 30, 1995	14.01	14.01	13.22	13.22
479	NASDAQ	CHK	Fri, Jan 27, 1995	13.75	14.27	13.22	13.41
478	NASDAQ	CHK	Thu, Jan 26, 1995	15.33	15.86	13.48	13.75
477	NASDAQ	CHK	Wed, Jan 25, 1995	14.27	14.80	13.75	14.54
476	NASDAQ	CHK	Tue, Jan 24, 1995	13.22	14.54	12.95	14.27
475	NASDAQ	CHK	Mon, Jan 23, 1995	12.42	13.22	12.16	13.22
474	NASDAQ	CHK	Fri, Jan 20, 1995	11.10	12.95	10.84	12.82
473	NASDAQ	CHK	Thu, Jan 19, 1995	11.23	11.37	10.57	11.23
472	NASDAQ	CHK	Wed, Jan 18, 1995	12.42	12.95	11.37	11.37
471	NASDAQ	CHK	Tue, Jan 17, 1995	13.75	13.75	12.16	12.82
470	NASDAQ	CHK	Mon, Jan 16, 1995	13.48	14.01	13.22	13.22
469	NASDAQ	CHK	Fri, Jan 13, 1995	13.22	13.75	12.16	13.35
468	NASDAQ	CHK	Thu, Jan 12, 1995	14.01	14.54	13.22	13.48
467	NASDAQ	CHK	Wed, Jan 11, 1995	15.07	15.60	13.75	14.27
466	NASDAQ	CHK	Tue, Jan 10, 1995	15.07	15.60	14.54	14.80
465	NASDAQ	CHK	Mon, Jan 9, 1995	15.60	16.12	14.27	14.80
464	NASDAQ	CHK	Fri, Jan 6, 1995	16.92	16.92	15.60	15.60
463	NASDAQ	CHK	Thu, Jan 5, 1995	16.92	16.92	16.12	16.79
462	NASDAQ	CHK	Wed, Jan 4, 1995	16.92	16.92	16.39	16.92
461	NASDAQ	CHK	Tue, Jan 3, 1995	17.18	17.45	15.86	16.26
460	NASDAQ	CHK	Fri, Dec 30, 1994	17.45	17.45	16.65	16.65
459	NASDAQ	CHK	Thu, Dec 29, 1994	15.33	17.45	15.33	17.18
458	NASDAQ	CHK	Wed, Dec 28, 1994	15.60	16.39	14.80	15.33
457	NASDAQ	CHK	Tue, Dec 27, 1994	16.92	17.18	15.60	15.99
456	NASDAQ	CHK	Fri, Dec 23, 1994	16.92	17.18	16.39	16.65
455	NASDAQ	CHK	Thu, Dec 22, 1994	17.18	17.18	16.79	17.18
454	NASDAQ	CHK	Wed, Dec 21, 1994	16.92	17.18	16.39	17.18
453	NASDAQ	CHK	Tue, Dec 20, 1994	16.92	17.18	16.39	16.92
452	NASDAQ	CHK	Mon, Dec 19, 1994	16.92	18.24	15.86	16.92
451	NASDAQ	CHK	Fri, Dec 16, 1994	30.66	32.78	30.13	32.25
450	NASDAQ	CHK	Thu, Dec 15, 1994	31.19	31.19	30.40	30.40
449	NASDAQ	CHK	Wed, Dec 14, 1994	31.19	31.46	30.40	31.19
448	NASDAQ	CHK	Tue, Dec 13, 1994	30.66	31.19	29.87	30.93
447	NASDAQ	CHK	Mon, Dec 12, 1994	27.75	30.40	27.75	30.13
446	NASDAQ	CHK	Fri, Dec 9, 1994	27.49	28.81	25.64	27.75
445	NASDAQ	CHK	Thu, Dec 8, 1994	29.08	29.87	27.49	27.49
444	NASDAQ	CHK	Wed, Dec 7, 1994	31.19	31.19	29.08	29.08
443	NASDAQ	CHK	Tue, Dec 6, 1994	31.72	31.72	30.93	31.46
442	NASDAQ	CHK	Mon, Dec 5, 1994	31.98	31.98	31.19	31.72
441	NASDAQ	CHK	Fri, Dec 2, 1994	30.40	31.19	30.40	31.06
440	NASDAQ	CHK	Thu, Dec 1, 1994	31.19	31.19	30.40	30.79
439	NASDAQ	CHK	Wed, Nov 30, 1994	31.72	31.72	30.13	31.19
438	NASDAQ	CHK	Tue, Nov 29, 1994	32.51	32.78	30.93	31.46
437	NASDAQ	CHK	Mon, Nov 28, 1994	30.93	32.51	30.40	32.25
436	NASDAQ	CHK	Fri, Nov 25, 1994	30.13	30.93	30.13	30.93
435	NASDAQ	CHK	Wed, Nov 23, 1994	30.13	30.79	29.87	30.66
434	NASDAQ	CHK	Tue, Nov 22, 1994	31.19	31.19	30.66	30.66
433	NASDAQ	CHK	Mon, Nov 21, 1994	30.66	31.46	30.40	31.46
432	NASDAQ	CHK	Fri, Nov 18, 1994	30.13	30.93	29.87	30.93
431	NASDAQ	CHK	Thu, Nov 17, 1994	30.13	31.19	29.08	30.66
430	NASDAQ	CHK	Wed, Nov 16, 1994	31.46	31.46	29.87	30.93
429	NASDAQ	CHK	Tue, Nov 15, 1994	29.08	30.93	28.81	30.00
428	NASDAQ	CHK	Mon, Nov 14, 1994	28.28	29.08	27.49	28.81
427	NASDAQ	CHK	Fri, Nov 11, 1994	26.96	28.02	26.96	27.49
426	NASDAQ	CHK	Thu, Nov 10, 1994	26.17	27.23	26.17	27.23
425	NASDAQ	CHK	Wed, Nov 9, 1994	26.96	27.49	26.70	26.70
424	NASDAQ	CHK	Tue, Nov 8, 1994	26.70	26.96	26.17	26.17
423	NASDAQ	CHK	Mon, Nov 7, 1994	25.90	28.28	25.90	26.43
422	NASDAQ	CHK	Fri, Nov 4, 1994	25.64	25.90	25.38	25.90
421	NASDAQ	CHK	Thu, Nov 3, 1994	25.64	25.90	24.85	25.38
420	NASDAQ	CHK	Wed, Nov 2, 1994	24.58	24.85	24.05	24.78
419	NASDAQ	CHK	Tue, Nov 1, 1994	24.58	25.34	24.05	24.58
418	NASDAQ	CHK	Mon, Oct 31, 1994	25.64	25.90	24.58	24.58
417	NASDAQ	CHK	Fri, Oct 28, 1994	24.58	26.70	24.58	25.64
416	NASDAQ	CHK	Thu, Oct 27, 1994	28.02	28.81	25.38	25.90
415	NASDAQ	CHK	Wed, Oct 26, 1994	24.32	27.23	24.32	26.43
414	NASDAQ	CHK	Tue, Oct 25, 1994	23.79	24.32	23.26	23.92
413	NASDAQ	CHK	Mon, Oct 24, 1994	22.73	23.79	22.20	23.79
412	NASDAQ	CHK	Fri, Oct 21, 1994	22.47	22.60	21.68	22.60
411	NASDAQ	CHK	Thu, Oct 20, 1994	22.20	22.47	21.68	22.20
410	NASDAQ	CHK	Wed, Oct 19, 1994	23.79	23.79	21.94	22.47
409	NASDAQ	CHK	Tue, Oct 18, 1994	23.79	23.79	23.00	23.13
408	NASDAQ	CHK	Mon, Oct 17, 1994	23.79	23.79	23.26	23.66
407	NASDAQ	CHK	Fri, Oct 14, 1994	23.00	23.79	23.00	23.79
406	NASDAQ	CHK	Thu, Oct 13, 1994	23.53	24.32	23.00	23.26
405	NASDAQ	CHK	Wed, Oct 12, 1994	23.26	23.79	22.73	23.26
404	NASDAQ	CHK	Tue, Oct 11, 1994	22.73	23.26	22.47	23.13
403	NASDAQ	CHK	Mon, Oct 10, 1994	21.94	23.00	21.94	22.47
402	NASDAQ	CHK	Fri, Oct 7, 1994	21.15	21.68	20.62	21.68
401	NASDAQ	CHK	Thu, Oct 6, 1994	21.41	21.41	20.62	21.41
400	NASDAQ	CHK	Wed, Oct 5, 1994	20.49	21.41	20.35	21.41
399	NASDAQ	CHK	Tue, Oct 4, 1994	21.41	22.20	20.62	20.62
398	NASDAQ	CHK	Mon, Oct 3, 1994	22.20	22.47	21.41	21.54
397	NASDAQ	CHK	Fri, Sep 30, 1994	21.41	22.73	21.41	22.47
396	NASDAQ	CHK	Thu, Sep 29, 1994	21.68	22.20	19.56	22.20
395	NASDAQ	CHK	Wed, Sep 28, 1994	22.20	22.20	21.15	21.15
394	NASDAQ	CHK	Tue, Sep 27, 1994	21.94	22.73	21.94	21.94
393	NASDAQ	CHK	Mon, Sep 26, 1994	22.73	22.73	21.94	22.34
392	NASDAQ	CHK	Fri, Sep 23, 1994	23.00	23.00	22.20	22.73
391	NASDAQ	CHK	Thu, Sep 22, 1994	20.88	23.26	20.88	22.20
390	NASDAQ	CHK	Wed, Sep 21, 1994	21.41	21.41	20.88	21.41
389	NASDAQ	CHK	Tue, Sep 20, 1994	21.94	21.94	20.88	20.88
388	NASDAQ	CHK	Mon, Sep 19, 1994	21.41	22.20	21.41	21.54
387	NASDAQ	CHK	Fri, Sep 16, 1994	19.03	22.73	18.24	21.54
386	NASDAQ	CHK	Thu, Sep 15, 1994	17.71	19.03	17.71	18.77
385	NASDAQ	CHK	Wed, Sep 14, 1994	17.71	18.24	17.71	18.24
384	NASDAQ	CHK	Tue, Sep 13, 1994	17.71	18.24	17.45	18.04
383	NASDAQ	CHK	Mon, Sep 12, 1994	18.24	18.24	17.58	18.24
382	NASDAQ	CHK	Fri, Sep 9, 1994	18.77	18.77	17.71	17.97
381	NASDAQ	CHK	Thu, Sep 8, 1994	17.45	19.82	16.92	18.90
380	NASDAQ	CHK	Wed, Sep 7, 1994	16.12	17.18	16.12	17.18
379	NASDAQ	CHK	Tue, Sep 6, 1994	16.12	16.65	16.12	16.12
378	NASDAQ	CHK	Fri, Sep 2, 1994	16.12	16.65	16.12	16.65
377	NASDAQ	CHK	Thu, Sep 1, 1994	16.92	17.45	16.12	16.39
376	NASDAQ	CHK	Wed, Aug 31, 1994	17.45	17.71	16.92	16.92
375	NASDAQ	CHK	Tue, Aug 30, 1994	17.45	17.45	17.18	17.31
374	NASDAQ	CHK	Mon, Aug 29, 1994	17.45	17.71	17.18	17.71
373	NASDAQ	CHK	Fri, Aug 26, 1994	16.65	17.45	16.65	16.92
372	NASDAQ	CHK	Thu, Aug 25, 1994	17.71	17.71	16.65	16.92
371	NASDAQ	CHK	Wed, Aug 24, 1994	16.92	18.24	16.92	16.92
370	NASDAQ	CHK	Tue, Aug 23, 1994	15.60	16.12	15.60	15.99
369	NASDAQ	CHK	Mon, Aug 22, 1994	16.12	16.12	15.53	15.73
368	NASDAQ	CHK	Fri, Aug 19, 1994	15.33	16.12	15.33	16.12
367	NASDAQ	CHK	Thu, Aug 18, 1994	15.33	16.65	14.80	15.33
366	NASDAQ	CHK	Wed, Aug 17, 1994	13.22	16.65	13.22	15.33
365	NASDAQ	CHK	Tue, Aug 16, 1994	13.75	13.75	12.95	13.48
364	NASDAQ	CHK	Mon, Aug 15, 1994	13.75	13.75	12.95	13.22
363	NASDAQ	CHK	Fri, Aug 12, 1994	13.48	13.75	12.95	12.95
362	NASDAQ	CHK	Thu, Aug 11, 1994	12.95	13.35	12.16	13.35
361	NASDAQ	CHK	Wed, Aug 10, 1994	12.42	12.95	12.42	12.69
360	NASDAQ	CHK	Tue, Aug 9, 1994	12.42	13.22	12.42	12.95
359	NASDAQ	CHK	Mon, Aug 8, 1994	13.22	13.22	12.42	12.42
358	NASDAQ	CHK	Fri, Aug 5, 1994	12.69	13.48	12.42	13.22
357	NASDAQ	CHK	Thu, Aug 4, 1994	12.95	13.48	12.42	13.22
356	NASDAQ	CHK	Wed, Aug 3, 1994	12.42	13.22	12.42	12.42
355	NASDAQ	CHK	Tue, Aug 2, 1994	11.23	13.22	10.57	13.08
354	NASDAQ	CHK	Mon, Aug 1, 1994	10.57	11.37	10.31	10.84
353	NASDAQ	CHK	Fri, Jul 29, 1994	10.57	10.97	10.18	10.71
352	NASDAQ	CHK	Thu, Jul 28, 1994	9.91	10.84	9.91	9.91
351	NASDAQ	CHK	Wed, Jul 27, 1994	10.04	10.04	9.91	9.91
350	NASDAQ	CHK	Tue, Jul 26, 1994	10.04	10.04	9.91	10.04
349	NASDAQ	CHK	Mon, Jul 25, 1994	10.31	10.31	9.78	10.31
348	NASDAQ	CHK	Fri, Jul 22, 1994	9.78	10.18	9.78	10.18
347	NASDAQ	CHK	Thu, Jul 21, 1994	10.57	10.57	9.78	9.78
346	NASDAQ	CHK	Wed, Jul 20, 1994	10.04	10.57	10.04	10.57
345	NASDAQ	CHK	Tue, Jul 19, 1994	10.44	10.57	9.78	10.57
344	NASDAQ	CHK	Mon, Jul 18, 1994	9.25	10.57	9.25	10.31
343	NASDAQ	CHK	Fri, Jul 15, 1994	9.52	9.52	9.25	9.52
342	NASDAQ	CHK	Thu, Jul 14, 1994	8.99	9.52	8.99	9.52
341	NASDAQ	CHK	Wed, Jul 13, 1994	9.25	9.52	8.99	9.38
340	NASDAQ	CHK	Tue, Jul 12, 1994	9.25	9.25	8.99	9.25
339	NASDAQ	CHK	Mon, Jul 11, 1994	8.46	9.25	8.46	8.72
338	NASDAQ	CHK	Fri, Jul 8, 1994	8.19	8.99	8.19	8.46
337	NASDAQ	CHK	Wed, Jul 6, 1994	8.99	8.99	8.72	8.72
336	NASDAQ	CHK	Fri, Jul 1, 1994	8.59	8.59	8.46	8.46
335	NASDAQ	CHK	Thu, Jun 30, 1994	8.99	8.99	8.19	8.19
334	NASDAQ	CHK	Wed, Jun 29, 1994	8.19	8.99	8.19	8.99
333	NASDAQ	CHK	Tue, Jun 28, 1994	8.19	8.46	8.19	8.46
332	NASDAQ	CHK	Mon, Jun 27, 1994	8.46	8.46	8.46	8.46
331	NASDAQ	CHK	Fri, Jun 24, 1994	8.46	8.99	8.46	8.59
330	NASDAQ	CHK	Thu, Jun 23, 1994	8.99	8.99	8.46	8.99
329	NASDAQ	CHK	Wed, Jun 22, 1994	8.99	8.99	8.46	8.46
328	NASDAQ	CHK	Tue, Jun 21, 1994	9.52	9.52	8.46	9.25
327	NASDAQ	CHK	Mon, Jun 20, 1994	9.52	9.52	8.99	8.99
326	NASDAQ	CHK	Fri, Jun 17, 1994	9.52	9.52	8.99	9.12
325	NASDAQ	CHK	Thu, Jun 16, 1994	8.72	9.25	8.72	9.12
324	NASDAQ	CHK	Wed, Jun 15, 1994	9.52	9.52	8.99	9.12
323	NASDAQ	CHK	Tue, Jun 14, 1994	9.52	9.52	8.99	8.99
322	NASDAQ	CHK	Mon, Jun 13, 1994	9.25	9.25	8.46	8.99
321	NASDAQ	CHK	Fri, Jun 10, 1994	8.72	8.72	8.46	8.72
320	NASDAQ	CHK	Thu, Jun 9, 1994	8.46	8.99	8.46	8.46
319	NASDAQ	CHK	Wed, Jun 8, 1994	8.46	8.46	7.93	8.06
318	NASDAQ	CHK	Tue, Jun 7, 1994	8.19	8.59	7.93	7.93
317	NASDAQ	CHK	Mon, Jun 6, 1994	7.40	7.93	7.40	7.40
316	NASDAQ	CHK	Fri, Jun 3, 1994	7.40	7.93	7.40	7.93
315	NASDAQ	CHK	Thu, Jun 2, 1994	7.93	7.93	7.40	7.67
314	NASDAQ	CHK	Wed, Jun 1, 1994	8.19	8.19	7.14	7.93
313	NASDAQ	CHK	Tue, May 31, 1994	8.19	8.72	8.19	8.19
312	NASDAQ	CHK	Fri, May 27, 1994	8.19	8.59	7.40	8.59
311	NASDAQ	CHK	Thu, May 26, 1994	8.19	8.19	7.40	8.19
310	NASDAQ	CHK	Wed, May 25, 1994	6.87	8.19	6.87	8.19
309	NASDAQ	CHK	Tue, May 24, 1994	7.40	7.40	7.40	7.40
308	NASDAQ	CHK	Mon, May 23, 1994	7.14	7.40	7.14	7.40
307	NASDAQ	CHK	Fri, May 20, 1994	7.67	7.67	7.14	7.14
306	NASDAQ	CHK	Thu, May 19, 1994	7.67	7.67	7.53	7.53
305	NASDAQ	CHK	Wed, May 18, 1994	7.14	7.67	7.14	7.67
304	NASDAQ	CHK	Tue, May 17, 1994	7.93	7.93	7.14	7.27
303	NASDAQ	CHK	Mon, May 16, 1994	7.93	7.93	7.14	7.93
302	NASDAQ	CHK	Fri, May 13, 1994	7.14	7.40	7.14	7.40
301	NASDAQ	CHK	Thu, May 12, 1994	8.19	8.19	7.40	7.40
300	NASDAQ	CHK	Wed, May 11, 1994	6.61	8.19	6.61	7.40
299	NASDAQ	CHK	Tue, May 10, 1994	6.74	7.14	6.34	7.14
298	NASDAQ	CHK	Mon, May 9, 1994	6.34	6.61	5.55	6.61
297	NASDAQ	CHK	Fri, May 6, 1994	6.34	6.34	5.82	6.08
296	NASDAQ	CHK	Thu, May 5, 1994	6.34	6.34	5.82	5.82
295	NASDAQ	CHK	Wed, May 4, 1994	6.61	6.61	6.34	6.34
294	NASDAQ	CHK	Tue, May 3, 1994	6.34	6.34	5.68	5.68
293	NASDAQ	CHK	Mon, May 2, 1994	6.34	6.34	5.95	6.34
292	NASDAQ	CHK	Fri, Apr 29, 1994	6.34	6.34	5.82	6.08
291	NASDAQ	CHK	Thu, Apr 28, 1994	6.08	6.61	6.08	6.34
290	NASDAQ	CHK	Tue, Apr 26, 1994	6.08	6.08	5.29	5.68
289	NASDAQ	CHK	Mon, Apr 25, 1994	6.08	6.08	5.55	6.08
288	NASDAQ	CHK	Fri, Apr 22, 1994	5.55	5.82	5.29	5.82
287	NASDAQ	CHK	Thu, Apr 21, 1994	5.29	5.55	5.29	5.29
286	NASDAQ	CHK	Wed, Apr 20, 1994	5.29	5.29	5.15	5.29
285	NASDAQ	CHK	Tue, Apr 19, 1994	6.08	6.08	4.89	5.29
284	NASDAQ	CHK	Fri, Apr 15, 1994	6.08	6.61	6.08	6.61
283	NASDAQ	CHK	Thu, Apr 14, 1994	6.34	6.34	5.55	6.34
282	NASDAQ	CHK	Wed, Apr 13, 1994	6.08	6.34	5.68	6.34
281	NASDAQ	CHK	Tue, Apr 12, 1994	6.08	6.61	6.08	6.61
280	NASDAQ	CHK	Mon, Apr 11, 1994	6.87	6.87	6.08	6.08
279	NASDAQ	CHK	Fri, Apr 8, 1994	6.61	7.14	6.34	7.14
278	NASDAQ	CHK	Thu, Apr 7, 1994	7.14	7.14	6.61	7.14
277	NASDAQ	CHK	Wed, Apr 6, 1994	6.61	6.87	6.34	6.87
276	NASDAQ	CHK	Tue, Apr 5, 1994	6.87	6.87	6.34	6.34
275	NASDAQ	CHK	Thu, Mar 31, 1994	6.61	6.61	6.61	6.61
274	NASDAQ	CHK	Wed, Mar 30, 1994	5.82	6.61	5.82	5.82
273	NASDAQ	CHK	Tue, Mar 29, 1994	6.34	6.34	5.82	6.34
272	NASDAQ	CHK	Mon, Mar 28, 1994	6.87	6.87	6.34	6.34
271	NASDAQ	CHK	Fri, Mar 25, 1994	6.34	6.87	6.08	6.08
270	NASDAQ	CHK	Thu, Mar 24, 1994	6.08	6.61	6.08	6.61
269	NASDAQ	CHK	Wed, Mar 23, 1994	6.61	6.61	6.48	6.61
268	NASDAQ	CHK	Fri, Mar 18, 1994	6.34	6.61	6.34	6.61
267	NASDAQ	CHK	Thu, Mar 17, 1994	6.34	6.61	6.34	6.61
266	NASDAQ	CHK	Wed, Mar 16, 1994	6.08	6.61	6.08	6.61
265	NASDAQ	CHK	Mon, Mar 14, 1994	6.48	6.48	6.08	6.08
264	NASDAQ	CHK	Fri, Mar 11, 1994	6.08	6.34	6.08	6.34
263	NASDAQ	CHK	Thu, Mar 10, 1994	6.08	6.61	6.08	6.34
262	NASDAQ	CHK	Wed, Mar 9, 1994	6.61	7.14	6.21	6.34
261	NASDAQ	CHK	Tue, Mar 8, 1994	6.34	6.34	5.55	6.34
260	NASDAQ	CHK	Mon, Mar 7, 1994	5.55	6.34	5.55	5.55
259	NASDAQ	CHK	Fri, Mar 4, 1994	6.34	6.34	5.55	5.68
258	NASDAQ	CHK	Thu, Mar 3, 1994	5.55	5.82	5.55	5.82
257	NASDAQ	CHK	Wed, Mar 2, 1994	5.55	5.95	5.55	5.95
256	NASDAQ	CHK	Tue, Mar 1, 1994	6.34	6.34	6.34	6.34
255	NASDAQ	CHK	Fri, Feb 25, 1994	5.55	5.55	5.55	5.55
254	NASDAQ	CHK	Thu, Feb 24, 1994	6.34	6.34	6.34	6.34
253	NASDAQ	CHK	Wed, Feb 23, 1994	6.34	6.34	5.55	6.08
252	NASDAQ	CHK	Tue, Feb 22, 1994	5.55	5.55	5.55	5.55
251	NASDAQ	CHK	Fri, Feb 18, 1994	6.08	6.08	5.55	5.55
250	NASDAQ	CHK	Thu, Feb 17, 1994	6.08	6.08	5.29	5.29
249	NASDAQ	CHK	Wed, Feb 16, 1994	6.61	6.61	5.29	6.08
248	NASDAQ	CHK	Tue, Feb 15, 1994	6.21	6.21	6.08	6.08
247	NASDAQ	CHK	Mon, Feb 14, 1994	6.61	6.61	6.08	6.61
246	NASDAQ	CHK	Fri, Feb 11, 1994	6.48	6.48	6.08	6.08
245	NASDAQ	CHK	Thu, Feb 10, 1994	6.61	6.61	6.61	6.61
244	NASDAQ	CHK	Wed, Feb 9, 1994	6.21	6.61	6.21	6.34
243	NASDAQ	CHK	Tue, Feb 8, 1994	6.61	6.61	6.08	6.21
242	NASDAQ	CHK	Mon, Feb 7, 1994	6.48	6.48	6.08	6.08
241	NASDAQ	CHK	Fri, Feb 4, 1994	6.08	6.34	6.08	6.08
240	NASDAQ	CHK	Thu, Feb 3, 1994	6.08	6.61	6.08	6.61
239	NASDAQ	CHK	Wed, Feb 2, 1994	6.34	6.87	6.08	6.87
238	NASDAQ	CHK	Tue, Feb 1, 1994	7.14	7.14	6.34	7.14
237	NASDAQ	CHK	Mon, Jan 31, 1994	7.14	7.14	6.87	7.14
236	NASDAQ	CHK	Fri, Jan 28, 1994	7.14	7.14	7.14	7.14
235	NASDAQ	CHK	Thu, Jan 27, 1994	6.61	7.14	6.34	6.87
234	NASDAQ	CHK	Wed, Jan 26, 1994	6.61	7.14	6.08	7.14
233	NASDAQ	CHK	Tue, Jan 25, 1994	5.82	6.61	5.82	6.08
232	NASDAQ	CHK	Mon, Jan 24, 1994	5.55	5.82	5.29	5.82
231	NASDAQ	CHK	Fri, Jan 21, 1994	5.29	5.55	5.02	5.29
230	NASDAQ	CHK	Thu, Jan 20, 1994	4.76	5.29	4.76	5.29
229	NASDAQ	CHK	Tue, Jan 18, 1994	5.29	5.29	5.02	5.15
228	NASDAQ	CHK	Mon, Jan 17, 1994	5.29	5.29	5.29	5.29
227	NASDAQ	CHK	Fri, Jan 14, 1994	4.49	5.29	4.49	4.76
226	NASDAQ	CHK	Thu, Jan 13, 1994	5.55	5.55	4.49	5.02
225	NASDAQ	CHK	Wed, Jan 12, 1994	5.02	5.55	5.02	5.55
224	NASDAQ	CHK	Tue, Jan 11, 1994	5.55	5.55	5.02	5.55
223	NASDAQ	CHK	Mon, Jan 10, 1994	5.82	5.82	5.02	5.02
222	NASDAQ	CHK	Fri, Jan 7, 1994	5.55	5.55	5.55	5.55
221	NASDAQ	CHK	Thu, Jan 6, 1994	5.02	5.82	5.02	5.82
220	NASDAQ	CHK	Wed, Jan 5, 1994	5.82	5.82	5.02	5.29
219	NASDAQ	CHK	Tue, Jan 4, 1994	5.29	5.29	5.02	5.02
218	NASDAQ	CHK	Mon, Jan 3, 1994	5.29	5.82	5.15	5.15
217	NASDAQ	CHK	Fri, Dec 31, 1993	5.02	5.29	5.02	5.02
216	NASDAQ	CHK	Thu, Dec 30, 1993	5.02	5.29	5.02	5.02
215	NASDAQ	CHK	Wed, Dec 29, 1993	5.55	5.55	5.02	5.02
214	NASDAQ	CHK	Tue, Dec 28, 1993	5.02	5.55	5.02	5.02
213	NASDAQ	CHK	Mon, Dec 27, 1993	4.76	5.29	4.76	5.29
212	NASDAQ	CHK	Thu, Dec 23, 1993	5.29	5.29	4.76	5.29
211	NASDAQ	CHK	Wed, Dec 22, 1993	5.82	6.34	4.76	4.89
210	NASDAQ	CHK	Tue, Dec 21, 1993	6.21	6.21	5.82	5.82
209	NASDAQ	CHK	Mon, Dec 20, 1993	5.82	6.61	5.82	5.95
208	NASDAQ	CHK	Fri, Dec 17, 1993	5.82	6.61	5.82	5.82
207	NASDAQ	CHK	Thu, Dec 16, 1993	6.61	6.61	6.08	6.08
206	NASDAQ	CHK	Wed, Dec 15, 1993	6.08	6.34	6.08	6.34
205	NASDAQ	CHK	Tue, Dec 14, 1993	6.87	6.87	6.08	6.48
204	NASDAQ	CHK	Mon, Dec 13, 1993	6.34	7.40	6.34	6.48
203	NASDAQ	CHK	Fri, Dec 10, 1993	7.14	7.40	6.34	6.61
202	NASDAQ	CHK	Thu, Dec 9, 1993	6.61	7.40	6.61	7.40
201	NASDAQ	CHK	Wed, Dec 8, 1993	6.61	7.40	6.61	7.40
200	NASDAQ	CHK	Tue, Dec 7, 1993	6.74	7.40	6.61	6.61
199	NASDAQ	CHK	Mon, Dec 6, 1993	6.61	7.40	6.61	7.40
198	NASDAQ	CHK	Fri, Dec 3, 1993	6.61	7.40	6.61	7.40
197	NASDAQ	CHK	Thu, Dec 2, 1993	6.61	7.40	6.61	7.40
196	NASDAQ	CHK	Wed, Dec 1, 1993	6.61	6.61	6.61	6.61
195	NASDAQ	CHK	Tue, Nov 30, 1993	7.14	7.14	6.61	7.14
194	NASDAQ	CHK	Mon, Nov 29, 1993	6.61	6.87	6.61	6.61
193	NASDAQ	CHK	Fri, Nov 26, 1993	6.61	6.87	6.61	6.87
192	NASDAQ	CHK	Wed, Nov 24, 1993	6.87	6.87	6.87	6.87
191	NASDAQ	CHK	Tue, Nov 23, 1993	7.67	7.67	6.61	6.61
190	NASDAQ	CHK	Mon, Nov 22, 1993	7.93	7.93	7.40	7.40
189	NASDAQ	CHK	Fri, Nov 19, 1993	7.93	7.93	7.93	7.93
188	NASDAQ	CHK	Wed, Nov 17, 1993	7.93	7.93	7.67	7.80
187	NASDAQ	CHK	Tue, Nov 16, 1993	7.40	7.40	7.40	7.40
186	NASDAQ	CHK	Mon, Nov 15, 1993	7.93	7.93	7.40	7.40
185	NASDAQ	CHK	Fri, Nov 12, 1993	7.40	7.93	7.40	7.93
184	NASDAQ	CHK	Thu, Nov 11, 1993	7.93	7.93	7.53	7.53
183	NASDAQ	CHK	Wed, Nov 10, 1993	7.93	7.93	7.93	7.93
182	NASDAQ	CHK	Tue, Nov 9, 1993	7.53	7.93	7.14	7.40
181	NASDAQ	CHK	Mon, Nov 8, 1993	7.14	7.14	7.14	7.14
180	NASDAQ	CHK	Fri, Nov 5, 1993	7.93	7.93	7.14	7.40
179	NASDAQ	CHK	Thu, Nov 4, 1993	7.67	7.67	7.67	7.67
178	NASDAQ	CHK	Wed, Nov 3, 1993	7.67	7.67	6.87	6.87
177	NASDAQ	CHK	Tue, Nov 2, 1993	7.14	7.40	6.87	7.14
176	NASDAQ	CHK	Mon, Nov 1, 1993	6.34	7.14	6.34	6.34
175	NASDAQ	CHK	Fri, Oct 29, 1993	7.14	7.14	6.48	6.48
174	NASDAQ	CHK	Thu, Oct 28, 1993	7.14	7.14	6.34	7.14
173	NASDAQ	CHK	Wed, Oct 27, 1993	6.34	7.14	6.34	6.48
172	NASDAQ	CHK	Tue, Oct 26, 1993	6.34	7.14	6.34	7.14
171	NASDAQ	CHK	Mon, Oct 25, 1993	7.14	7.14	6.34	6.34
170	NASDAQ	CHK	Fri, Oct 22, 1993	7.14	7.40	7.14	7.14
169	NASDAQ	CHK	Thu, Oct 21, 1993	7.67	7.67	7.14	7.40
168	NASDAQ	CHK	Wed, Oct 20, 1993	7.14	7.67	7.14	7.14
167	NASDAQ	CHK	Tue, Oct 19, 1993	7.67	7.67	7.14	7.67
166	NASDAQ	CHK	Mon, Oct 18, 1993	7.40	7.93	7.14	7.14
165	NASDAQ	CHK	Fri, Oct 15, 1993	7.93	7.93	7.40	7.40
164	NASDAQ	CHK	Thu, Oct 14, 1993	7.14	7.93	7.14	7.40
163	NASDAQ	CHK	Wed, Oct 13, 1993	8.19	8.19	7.14	7.67
162	NASDAQ	CHK	Tue, Oct 12, 1993	7.14	7.40	6.87	7.40
161	NASDAQ	CHK	Mon, Oct 11, 1993	6.87	7.14	6.61	7.14
160	NASDAQ	CHK	Fri, Oct 8, 1993	6.61	7.14	6.34	6.61
159	NASDAQ	CHK	Thu, Oct 7, 1993	6.61	6.61	6.08	6.34
158	NASDAQ	CHK	Wed, Oct 6, 1993	6.61	6.61	6.61	6.61
157	NASDAQ	CHK	Tue, Oct 5, 1993	6.61	7.14	5.55	6.21
156	NASDAQ	CHK	Mon, Oct 4, 1993	6.61	6.61	6.61	6.61
155	NASDAQ	CHK	Fri, Oct 1, 1993	6.74	7.40	6.74	7.40
154	NASDAQ	CHK	Thu, Sep 30, 1993	6.61	7.40	6.61	6.74
153	NASDAQ	CHK	Wed, Sep 29, 1993	6.87	6.87	6.87	6.87
152	NASDAQ	CHK	Tue, Sep 28, 1993	7.40	7.93	7.14	7.40
151	NASDAQ	CHK	Mon, Sep 27, 1993	7.40	7.93	7.40	7.53
150	NASDAQ	CHK	Fri, Sep 24, 1993	7.40	7.93	7.40	7.40
149	NASDAQ	CHK	Thu, Sep 23, 1993	8.19	8.19	7.27	7.40
148	NASDAQ	CHK	Wed, Sep 22, 1993	7.40	8.19	7.40	7.40
147	NASDAQ	CHK	Tue, Sep 21, 1993	8.19	8.19	8.19	8.19
146	NASDAQ	CHK	Mon, Sep 20, 1993	7.40	8.19	7.40	8.19
145	NASDAQ	CHK	Fri, Sep 17, 1993	7.40	8.19	7.40	7.67
144	NASDAQ	CHK	Thu, Sep 16, 1993	7.93	8.19	7.40	8.19
143	NASDAQ	CHK	Wed, Sep 15, 1993	9.52	9.52	7.27	7.40
142	NASDAQ	CHK	Tue, Sep 14, 1993	10.18	10.18	8.72	9.52
141	NASDAQ	CHK	Mon, Sep 13, 1993	10.31	10.31	10.31	10.31
140	NASDAQ	CHK	Fri, Sep 10, 1993	10.31	10.31	9.78	10.18
139	NASDAQ	CHK	Thu, Sep 9, 1993	11.63	11.63	9.78	10.04
138	NASDAQ	CHK	Wed, Sep 8, 1993	10.84	11.63	10.31	10.84
137	NASDAQ	CHK	Tue, Sep 7, 1993	10.84	10.84	10.84	10.84
136	NASDAQ	CHK	Thu, Sep 2, 1993	11.37	11.63	10.84	11.63
135	NASDAQ	CHK	Wed, Sep 1, 1993	11.23	11.37	10.84	11.37
134	NASDAQ	CHK	Tue, Aug 31, 1993	11.63	11.63	11.63	11.63
133	NASDAQ	CHK	Mon, Aug 30, 1993	11.63	11.63	11.63	11.63
132	NASDAQ	CHK	Fri, Aug 27, 1993	11.63	11.63	10.84	10.84
131	NASDAQ	CHK	Thu, Aug 26, 1993	10.84	11.63	10.84	11.63
130	NASDAQ	CHK	Wed, Aug 25, 1993	10.84	11.63	10.84	11.63
129	NASDAQ	CHK	Tue, Aug 24, 1993	10.84	10.84	10.84	10.84
128	NASDAQ	CHK	Fri, Aug 20, 1993	11.63	11.63	10.84	11.10
127	NASDAQ	CHK	Thu, Aug 19, 1993	11.63	11.63	10.84	11.10
126	NASDAQ	CHK	Wed, Aug 18, 1993	11.37	11.63	10.84	11.63
125	NASDAQ	CHK	Tue, Aug 17, 1993	11.37	11.37	10.84	11.37
124	NASDAQ	CHK	Mon, Aug 16, 1993	11.63	11.63	10.84	11.37
123	NASDAQ	CHK	Fri, Aug 13, 1993	11.63	11.63	10.84	10.84
122	NASDAQ	CHK	Thu, Aug 12, 1993	10.84	11.63	10.84	11.63
121	NASDAQ	CHK	Wed, Aug 11, 1993	10.84	11.63	10.84	10.84
120	NASDAQ	CHK	Tue, Aug 10, 1993	10.84	10.84	10.84	10.84
119	NASDAQ	CHK	Mon, Aug 9, 1993	10.84	10.84	10.84	10.84
118	NASDAQ	CHK	Fri, Aug 6, 1993	11.63	11.63	11.37	11.37
117	NASDAQ	CHK	Thu, Aug 5, 1993	11.10	11.10	11.10	11.10
116	NASDAQ	CHK	Wed, Aug 4, 1993	11.63	11.63	10.84	11.63
115	NASDAQ	CHK	Tue, Aug 3, 1993	11.63	11.63	10.84	11.63
114	NASDAQ	CHK	Mon, Aug 2, 1993	11.63	11.63	10.84	10.84
113	NASDAQ	CHK	Fri, Jul 30, 1993	11.63	11.63	10.97	11.23
112	NASDAQ	CHK	Thu, Jul 29, 1993	11.63	11.63	10.97	11.63
111	NASDAQ	CHK	Wed, Jul 28, 1993	11.63	11.63	10.84	10.84
110	NASDAQ	CHK	Tue, Jul 27, 1993	10.84	11.63	10.84	11.63
109	NASDAQ	CHK	Mon, Jul 26, 1993	11.63	11.63	11.63	11.63
108	NASDAQ	CHK	Thu, Jul 22, 1993	10.84	11.63	10.84	10.84
107	NASDAQ	CHK	Wed, Jul 21, 1993	11.63	11.63	10.84	10.84
106	NASDAQ	CHK	Tue, Jul 20, 1993	10.84	11.63	10.84	10.84
105	NASDAQ	CHK	Mon, Jul 19, 1993	11.37	11.63	10.84	11.63
104	NASDAQ	CHK	Fri, Jul 16, 1993	11.37	12.42	11.37	12.42
103	NASDAQ	CHK	Thu, Jul 15, 1993	11.89	11.89	11.37	11.37
102	NASDAQ	CHK	Wed, Jul 14, 1993	12.42	12.42	11.37	12.42
101	NASDAQ	CHK	Tue, Jul 13, 1993	11.89	11.89	11.37	11.89
100	NASDAQ	CHK	Mon, Jul 12, 1993	11.37	11.50	11.37	11.37
99	NASDAQ	CHK	Fri, Jul 9, 1993	11.89	12.42	11.37	11.37
98	NASDAQ	CHK	Thu, Jul 8, 1993	12.42	12.42	11.37	11.37
97	NASDAQ	CHK	Wed, Jul 7, 1993	11.63	12.16	11.37	11.37
96	NASDAQ	CHK	Tue, Jul 6, 1993	11.37	12.42	11.37	11.89
95	NASDAQ	CHK	Thu, Jul 1, 1993	11.37	12.42	11.37	12.42
94	NASDAQ	CHK	Wed, Jun 30, 1993	11.37	11.37	11.37	11.37
93	NASDAQ	CHK	Tue, Jun 29, 1993	11.37	11.37	11.37	11.37
92	NASDAQ	CHK	Fri, Jun 25, 1993	11.37	11.37	10.84	10.84
91	NASDAQ	CHK	Thu, Jun 24, 1993	11.37	11.37	10.84	11.37
90	NASDAQ	CHK	Wed, Jun 23, 1993	11.37	11.37	11.37	11.37
89	NASDAQ	CHK	Tue, Jun 22, 1993	10.84	11.37	10.84	10.97
88	NASDAQ	CHK	Mon, Jun 21, 1993	10.31	10.57	10.31	10.57
87	NASDAQ	CHK	Fri, Jun 18, 1993	10.04	10.31	9.38	9.91
86	NASDAQ	CHK	Thu, Jun 17, 1993	10.57	10.84	10.31	10.31
85	NASDAQ	CHK	Wed, Jun 16, 1993	11.10	11.10	10.31	10.57
84	NASDAQ	CHK	Tue, Jun 15, 1993	10.31	11.10	10.31	11.10
83	NASDAQ	CHK	Mon, Jun 14, 1993	11.37	11.37	10.31	10.31
82	NASDAQ	CHK	Fri, Jun 11, 1993	11.89	11.89	11.63	11.63
81	NASDAQ	CHK	Thu, Jun 10, 1993	11.37	11.89	11.37	11.37
80	NASDAQ	CHK	Wed, Jun 9, 1993	12.16	12.16	11.37	11.37
79	NASDAQ	CHK	Tue, Jun 8, 1993	12.16	12.16	11.63	12.16
78	NASDAQ	CHK	Mon, Jun 7, 1993	12.16	12.16	11.63	11.63
77	NASDAQ	CHK	Fri, Jun 4, 1993	12.69	12.69	12.42	12.69
76	NASDAQ	CHK	Thu, Jun 3, 1993	12.42	12.69	12.16	12.69
75	NASDAQ	CHK	Wed, Jun 2, 1993	11.37	12.16	11.37	12.16
74	NASDAQ	CHK	Tue, Jun 1, 1993	11.89	11.89	11.37	11.37
73	NASDAQ	CHK	Fri, May 28, 1993	11.37	11.37	11.37	11.37
72	NASDAQ	CHK	Thu, May 27, 1993	11.63	11.89	11.37	11.63
71	NASDAQ	CHK	Wed, May 26, 1993	11.37	11.63	11.10	11.37
70	NASDAQ	CHK	Tue, May 25, 1993	11.63	12.42	11.10	11.10
69	NASDAQ	CHK	Mon, May 24, 1993	12.95	12.95	12.16	12.16
68	NASDAQ	CHK	Fri, May 21, 1993	13.22	13.22	12.42	13.22
67	NASDAQ	CHK	Thu, May 20, 1993	12.82	13.22	12.16	12.69
66	NASDAQ	CHK	Wed, May 19, 1993	12.16	12.95	12.16	12.69
65	NASDAQ	CHK	Tue, May 18, 1993	12.42	12.95	12.16	12.16
64	NASDAQ	CHK	Mon, May 17, 1993	12.42	13.48	12.42	13.48
63	NASDAQ	CHK	Fri, May 14, 1993	13.22	13.22	12.42	13.22
62	NASDAQ	CHK	Thu, May 13, 1993	12.69	12.82	12.42	12.42
61	NASDAQ	CHK	Wed, May 12, 1993	12.69	12.95	12.69	12.95
60	NASDAQ	CHK	Tue, May 11, 1993	12.69	13.48	12.69	13.48
59	NASDAQ	CHK	Mon, May 10, 1993	12.16	12.42	11.89	11.89
58	NASDAQ	CHK	Fri, May 7, 1993	12.16	12.16	11.37	11.63
57	NASDAQ	CHK	Thu, May 6, 1993	11.10	11.10	11.10	11.10
56	NASDAQ	CHK	Wed, May 5, 1993	11.37	11.37	11.37	11.37
55	NASDAQ	CHK	Tue, May 4, 1993	11.10	11.63	11.10	11.10
54	NASDAQ	CHK	Mon, May 3, 1993	10.84	11.63	10.84	11.37
53	NASDAQ	CHK	Fri, Apr 30, 1993	11.89	11.89	11.10	11.63
52	NASDAQ	CHK	Thu, Apr 29, 1993	11.37	11.89	10.04	11.37
51	NASDAQ	CHK	Wed, Apr 28, 1993	12.42	12.56	11.63	11.63
50	NASDAQ	CHK	Tue, Apr 27, 1993	12.42	13.22	12.42	12.42
49	NASDAQ	CHK	Mon, Apr 26, 1993	12.42	12.42	12.42	12.42
48	NASDAQ	CHK	Fri, Apr 23, 1993	12.42	13.22	12.42	12.42
47	NASDAQ	CHK	Thu, Apr 22, 1993	12.69	12.82	12.42	12.42
46	NASDAQ	CHK	Wed, Apr 21, 1993	13.22	13.22	12.42	12.42
45	NASDAQ	CHK	Tue, Apr 20, 1993	13.08	13.08	12.69	12.82
44	NASDAQ	CHK	Mon, Apr 19, 1993	12.42	13.22	12.42	12.82
43	NASDAQ	CHK	Fri, Apr 16, 1993	12.95	12.95	12.42	12.95
42	NASDAQ	CHK	Thu, Apr 15, 1993	12.42	12.69	12.16	12.42
41	NASDAQ	CHK	Wed, Apr 14, 1993	12.69	12.69	12.16	12.16
40	NASDAQ	CHK	Tue, Apr 13, 1993	12.16	12.69	12.16	12.16
39	NASDAQ	CHK	Mon, Apr 12, 1993	12.69	13.22	12.16	12.69
38	NASDAQ	CHK	Thu, Apr 8, 1993	12.95	13.48	12.69	12.69
37	NASDAQ	CHK	Wed, Apr 7, 1993	12.42	13.48	12.42	13.08
36	NASDAQ	CHK	Tue, Apr 6, 1993	12.42	12.95	12.42	12.95
35	NASDAQ	CHK	Mon, Apr 5, 1993	12.42	12.95	12.42	12.69
34	NASDAQ	CHK	Fri, Apr 2, 1993	12.95	12.95	12.42	12.69
33	NASDAQ	CHK	Thu, Apr 1, 1993	12.95	12.95	12.69	12.69
32	NASDAQ	CHK	Wed, Mar 31, 1993	12.95	12.95	12.16	12.95
31	NASDAQ	CHK	Tue, Mar 30, 1993	12.42	12.95	12.16	12.95
30	NASDAQ	CHK	Mon, Mar 29, 1993	12.16	12.95	12.16	12.69
29	NASDAQ	CHK	Fri, Mar 26, 1993	12.56	12.56	12.16	12.29
28	NASDAQ	CHK	Thu, Mar 25, 1993	12.56	12.56	12.16	12.29
27	NASDAQ	CHK	Wed, Mar 24, 1993	11.89	12.56	11.89	12.56
26	NASDAQ	CHK	Tue, Mar 23, 1993	12.69	12.69	11.89	12.16
25	NASDAQ	CHK	Mon, Mar 22, 1993	12.69	12.69	12.16	12.69
24	NASDAQ	CHK	Fri, Mar 19, 1993	11.89	12.69	11.89	12.69
23	NASDAQ	CHK	Thu, Mar 18, 1993	12.69	12.69	12.16	12.16
22	NASDAQ	CHK	Wed, Mar 17, 1993	12.42	12.95	12.42	12.42
21	NASDAQ	CHK	Tue, Mar 16, 1993	12.42	12.95	12.42	12.42
20	NASDAQ	CHK	Mon, Mar 15, 1993	12.42	12.95	12.42	12.95
19	NASDAQ	CHK	Fri, Mar 12, 1993	12.95	12.95	12.16	12.69
18	NASDAQ	CHK	Thu, Mar 11, 1993	12.95	12.95	12.42	12.42
17	NASDAQ	CHK	Wed, Mar 10, 1993	12.95	12.95	12.42	12.82
16	NASDAQ	CHK	Tue, Mar 9, 1993	12.69	12.82	12.42	12.42
15	NASDAQ	CHK	Mon, Mar 8, 1993	12.42	12.69	12.16	12.42
14	NASDAQ	CHK	Fri, Mar 5, 1993	11.89	12.42	11.63	12.42
13	NASDAQ	CHK	Thu, Mar 4, 1993	12.16	12.16	11.63	11.89
12	NASDAQ	CHK	Wed, Mar 3, 1993	11.63	11.89	11.37	11.63
11	NASDAQ	CHK	Tue, Mar 2, 1993	11.10	11.63	11.10	11.37
10	NASDAQ	CHK	Mon, Mar 1, 1993	11.63	11.63	11.10	11.50
9	NASDAQ	CHK	Fri, Feb 26, 1993	10.84	11.63	10.31	10.84
8	NASDAQ	CHK	Thu, Feb 25, 1993	9.25	11.10	9.25	11.10
7	NASDAQ	CHK	Wed, Feb 24, 1993	9.25	10.04	8.99	9.25
6	NASDAQ	CHK	Tue, Feb 23, 1993	10.57	10.57	9.25	9.25
5	NASDAQ	CHK	Mon, Feb 22, 1993	10.57	10.84	10.57	10.57
4	NASDAQ	CHK	Fri, Feb 19, 1993	10.84	10.84	10.57	10.57
3	NASDAQ	CHK	Thu, Feb 18, 1993	10.57	10.84	10.57	10.57
2	NASDAQ	CHK	Wed, Feb 17, 1993	10.57	11.10	10.57	10.57
1	NASDAQ	CHK	Tue, Feb 16, 1993	12.69	12.69	11.10	11.10
#	Exchange	Symbol	Date	Open	High	Low	Close

Chesapeake Energy Corp NASDAQ:CHK Historical Prices

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