Nordic American Tankers Ltd NYSE:NAT Historical Prices

Below are the 6286 trading days of historical prices for NAT.

#	Exchange	Symbol	Date	Open	High	Low	Close
6286	NYSE	NAT	Wed, Jan 18, 2023	3.22	3.31	3.13	3.15
6285	NYSE	NAT	Tue, Jan 17, 2023	3.15	3.27	3.14	3.22
6284	NYSE	NAT	Fri, Jan 13, 2023	3.04	3.15	3.00	3.14
6283	NYSE	NAT	Thu, Jan 12, 2023	2.97	3.05	2.95	3.02
6282	NYSE	NAT	Wed, Jan 11, 2023	3.05	3.10	2.93	2.96
6281	NYSE	NAT	Tue, Jan 10, 2023	2.93	3.08	2.92	3.05
6280	NYSE	NAT	Mon, Jan 9, 2023	2.98	3.00	2.86	2.92
6279	NYSE	NAT	Fri, Jan 6, 2023	2.93	2.99	2.88	2.95
6278	NYSE	NAT	Thu, Jan 5, 2023	2.94	2.98	2.88	2.92
6277	NYSE	NAT	Wed, Jan 4, 2023	2.92	2.96	2.83	2.90
6276	NYSE	NAT	Tue, Jan 3, 2023	3.06	3.12	2.94	2.98
6275	NYSE	NAT	Fri, Dec 30, 2022	3.02	3.11	2.98	3.06
6274	NYSE	NAT	Thu, Dec 29, 2022	3.03	3.12	3.02	3.05
6273	NYSE	NAT	Wed, Dec 28, 2022	3.15	3.15	3.01	3.03
6272	NYSE	NAT	Tue, Dec 27, 2022	3.13	3.20	3.11	3.16
6271	NYSE	NAT	Fri, Dec 23, 2022	3.19	3.20	3.05	3.18
6270	NYSE	NAT	Thu, Dec 22, 2022	3.20	3.23	3.12	3.17
6269	NYSE	NAT	Wed, Dec 21, 2022	3.22	3.26	3.17	3.22
6268	NYSE	NAT	Tue, Dec 20, 2022	3.21	3.31	3.13	3.18
6267	NYSE	NAT	Mon, Dec 19, 2022	3.42	3.47	3.23	3.24
6266	NYSE	NAT	Fri, Dec 16, 2022	3.45	3.56	3.41	3.49
6265	NYSE	NAT	Thu, Dec 15, 2022	3.35	3.59	3.33	3.52
6264	NYSE	NAT	Wed, Dec 14, 2022	3.45	3.47	3.31	3.35
6263	NYSE	NAT	Tue, Dec 13, 2022	3.52	3.52	3.38	3.45
6262	NYSE	NAT	Mon, Dec 12, 2022	3.22	3.53	3.21	3.47
6261	NYSE	NAT	Fri, Dec 9, 2022	3.20	3.33	3.11	3.22
6260	NYSE	NAT	Thu, Dec 8, 2022	3.17	3.27	3.12	3.21
6259	NYSE	NAT	Wed, Dec 7, 2022	3.50	3.50	3.01	3.06
6258	NYSE	NAT	Tue, Dec 6, 2022	3.65	3.72	3.46	3.48
6257	NYSE	NAT	Mon, Dec 5, 2022	3.68	3.85	3.59	3.66
6256	NYSE	NAT	Fri, Dec 2, 2022	3.58	3.75	3.46	3.70
6255	NYSE	NAT	Thu, Dec 1, 2022	3.61	3.78	3.56	3.58
6254	NYSE	NAT	Wed, Nov 30, 2022	3.58	3.64	3.38	3.62
6253	NYSE	NAT	Tue, Nov 29, 2022	3.41	3.66	3.38	3.47
6252	NYSE	NAT	Mon, Nov 28, 2022	3.47	3.50	3.31	3.33
6251	NYSE	NAT	Fri, Nov 25, 2022	3.51	3.61	3.37	3.52
6250	NYSE	NAT	Wed, Nov 23, 2022	3.54	3.67	3.42	3.50
6249	NYSE	NAT	Tue, Nov 22, 2022	3.83	3.94	3.51	3.51
6248	NYSE	NAT	Mon, Nov 21, 2022	3.62	3.80	3.45	3.80
6247	NYSE	NAT	Fri, Nov 18, 2022	3.64	3.75	3.59	3.63
6246	NYSE	NAT	Thu, Nov 17, 2022	3.37	3.68	3.33	3.63
6245	NYSE	NAT	Wed, Nov 16, 2022	3.51	3.51	3.32	3.41
6244	NYSE	NAT	Tue, Nov 15, 2022	3.35	3.51	3.21	3.50
6243	NYSE	NAT	Mon, Nov 14, 2022	3.26	3.40	3.25	3.29
6242	NYSE	NAT	Fri, Nov 11, 2022	3.20	3.28	3.13	3.28
6241	NYSE	NAT	Thu, Nov 10, 2022	3.34	3.36	3.08	3.14
6240	NYSE	NAT	Wed, Nov 9, 2022	3.43	3.43	3.19	3.20
6239	NYSE	NAT	Tue, Nov 8, 2022	3.35	3.50	3.34	3.42
6238	NYSE	NAT	Mon, Nov 7, 2022	3.40	3.46	3.27	3.37
6237	NYSE	NAT	Fri, Nov 4, 2022	3.39	3.50	3.33	3.40
6236	NYSE	NAT	Thu, Nov 3, 2022	3.17	3.38	3.17	3.37
6235	NYSE	NAT	Wed, Nov 2, 2022	3.14	3.29	3.13	3.18
6234	NYSE	NAT	Tue, Nov 1, 2022	3.14	3.32	3.09	3.17
6233	NYSE	NAT	Mon, Oct 31, 2022	3.00	3.11	2.97	3.09
6232	NYSE	NAT	Fri, Oct 28, 2022	3.03	3.07	2.90	3.00
6231	NYSE	NAT	Thu, Oct 27, 2022	3.12	3.16	3.02	3.05
6230	NYSE	NAT	Wed, Oct 26, 2022	3.21	3.29	3.10	3.10
6229	NYSE	NAT	Tue, Oct 25, 2022	3.11	3.23	3.08	3.22
6228	NYSE	NAT	Mon, Oct 24, 2022	3.23	3.23	3.04	3.15
6227	NYSE	NAT	Fri, Oct 21, 2022	3.16	3.27	3.12	3.24
6226	NYSE	NAT	Thu, Oct 20, 2022	3.22	3.29	3.12	3.16
6225	NYSE	NAT	Wed, Oct 19, 2022	3.27	3.28	3.11	3.24
6224	NYSE	NAT	Tue, Oct 18, 2022	3.24	3.34	3.17	3.28
6223	NYSE	NAT	Mon, Oct 17, 2022	3.11	3.20	3.06	3.20
6222	NYSE	NAT	Fri, Oct 14, 2022	2.94	3.07	2.81	3.05
6221	NYSE	NAT	Thu, Oct 13, 2022	2.70	2.90	2.70	2.89
6220	NYSE	NAT	Wed, Oct 12, 2022	2.61	2.75	2.55	2.73
6219	NYSE	NAT	Tue, Oct 11, 2022	2.56	2.64	2.49	2.61
6218	NYSE	NAT	Mon, Oct 10, 2022	2.71	2.82	2.60	2.61
6217	NYSE	NAT	Fri, Oct 7, 2022	2.61	2.77	2.61	2.71
6216	NYSE	NAT	Thu, Oct 6, 2022	2.63	2.74	2.54	2.63
6215	NYSE	NAT	Wed, Oct 5, 2022	2.62	2.69	2.47	2.59
6214	NYSE	NAT	Tue, Oct 4, 2022	2.79	2.80	2.63	2.68
6213	NYSE	NAT	Mon, Oct 3, 2022	2.69	2.89	2.69	2.76
6212	NYSE	NAT	Fri, Sep 30, 2022	2.77	2.79	2.64	2.67
6211	NYSE	NAT	Thu, Sep 29, 2022	3.13	3.16	2.63	2.67
6210	NYSE	NAT	Wed, Sep 28, 2022	3.23	3.27	3.04	3.20
6209	NYSE	NAT	Tue, Sep 27, 2022	3.15	3.25	2.96	3.25
6208	NYSE	NAT	Mon, Sep 26, 2022	2.99	3.17	2.94	3.08
6207	NYSE	NAT	Fri, Sep 23, 2022	3.18	3.18	2.99	3.04
6206	NYSE	NAT	Thu, Sep 22, 2022	3.38	3.60	3.25	3.25
6205	NYSE	NAT	Wed, Sep 21, 2022	3.41	3.48	3.29	3.36
6204	NYSE	NAT	Tue, Sep 20, 2022	3.40	3.54	3.38	3.42
6203	NYSE	NAT	Mon, Sep 19, 2022	3.05	3.53	3.02	3.51
6202	NYSE	NAT	Fri, Sep 16, 2022	3.20	3.22	3.04	3.11
6201	NYSE	NAT	Thu, Sep 15, 2022	3.29	3.35	3.19	3.25
6200	NYSE	NAT	Wed, Sep 14, 2022	3.23	3.45	3.22	3.34
6199	NYSE	NAT	Tue, Sep 13, 2022	3.09	3.32	3.07	3.20
6198	NYSE	NAT	Mon, Sep 12, 2022	3.10	3.32	3.09	3.20
6197	NYSE	NAT	Fri, Sep 9, 2022	3.06	3.22	3.05	3.15
6196	NYSE	NAT	Thu, Sep 8, 2022	2.98	3.13	2.85	3.07
6195	NYSE	NAT	Wed, Sep 7, 2022	2.80	2.98	2.70	2.98
6194	NYSE	NAT	Tue, Sep 6, 2022	2.68	2.88	2.66	2.86
6193	NYSE	NAT	Fri, Sep 2, 2022	2.50	2.61	2.45	2.60
6192	NYSE	NAT	Thu, Sep 1, 2022	2.55	2.59	2.44	2.48
6191	NYSE	NAT	Wed, Aug 31, 2022	2.35	2.61	2.35	2.60
6190	NYSE	NAT	Tue, Aug 30, 2022	2.57	2.58	2.33	2.41
6189	NYSE	NAT	Mon, Aug 29, 2022	2.58	2.72	2.56	2.70
6188	NYSE	NAT	Fri, Aug 26, 2022	2.68	2.69	2.55	2.67
6187	NYSE	NAT	Thu, Aug 25, 2022	2.81	2.83	2.70	2.71
6186	NYSE	NAT	Wed, Aug 24, 2022	2.74	2.87	2.70	2.80
6185	NYSE	NAT	Tue, Aug 23, 2022	2.80	2.83	2.69	2.71
6184	NYSE	NAT	Mon, Aug 22, 2022	2.69	2.86	2.65	2.78
6183	NYSE	NAT	Fri, Aug 19, 2022	2.80	2.81	2.69	2.70
6182	NYSE	NAT	Thu, Aug 18, 2022	2.84	2.88	2.79	2.85
6181	NYSE	NAT	Wed, Aug 17, 2022	2.72	2.85	2.72	2.79
6180	NYSE	NAT	Tue, Aug 16, 2022	2.65	2.73	2.63	2.73
6179	NYSE	NAT	Mon, Aug 15, 2022	2.56	2.66	2.48	2.65
6178	NYSE	NAT	Fri, Aug 12, 2022	2.67	2.69	2.60	2.64
6177	NYSE	NAT	Thu, Aug 11, 2022	2.63	2.75	2.57	2.67
6176	NYSE	NAT	Wed, Aug 10, 2022	2.69	2.71	2.58	2.59
6175	NYSE	NAT	Tue, Aug 9, 2022	2.64	2.70	2.58	2.69
6174	NYSE	NAT	Mon, Aug 8, 2022	2.53	2.68	2.52	2.62
6173	NYSE	NAT	Fri, Aug 5, 2022	2.48	2.62	2.43	2.54
6172	NYSE	NAT	Thu, Aug 4, 2022	2.50	2.56	2.47	2.49
6171	NYSE	NAT	Wed, Aug 3, 2022	2.56	2.59	2.48	2.53
6170	NYSE	NAT	Tue, Aug 2, 2022	2.52	2.59	2.50	2.57
6169	NYSE	NAT	Mon, Aug 1, 2022	2.38	2.54	2.34	2.52
6168	NYSE	NAT	Fri, Jul 29, 2022	2.43	2.44	2.36	2.40
6167	NYSE	NAT	Thu, Jul 28, 2022	2.61	2.63	2.36	2.42
6166	NYSE	NAT	Wed, Jul 27, 2022	2.50	2.63	2.47	2.62
6165	NYSE	NAT	Tue, Jul 26, 2022	2.50	2.54	2.42	2.47
6164	NYSE	NAT	Mon, Jul 25, 2022	2.44	2.55	2.38	2.53
6163	NYSE	NAT	Fri, Jul 22, 2022	2.43	2.56	2.41	2.44
6162	NYSE	NAT	Thu, Jul 21, 2022	2.41	2.49	2.35	2.41
6161	NYSE	NAT	Wed, Jul 20, 2022	2.36	2.47	2.34	2.47
6160	NYSE	NAT	Tue, Jul 19, 2022	2.25	2.43	2.22	2.42
6159	NYSE	NAT	Mon, Jul 18, 2022	2.16	2.29	2.14	2.25
6158	NYSE	NAT	Fri, Jul 15, 2022	2.10	2.15	2.02	2.15
6157	NYSE	NAT	Thu, Jul 14, 2022	2.02	2.07	2.00	2.06
6156	NYSE	NAT	Wed, Jul 13, 2022	1.89	2.10	1.89	2.08
6155	NYSE	NAT	Tue, Jul 12, 2022	1.84	1.94	1.83	1.90
6154	NYSE	NAT	Mon, Jul 11, 2022	1.89	1.94	1.84	1.89
6153	NYSE	NAT	Fri, Jul 8, 2022	1.95	1.98	1.89	1.94
6152	NYSE	NAT	Thu, Jul 7, 2022	1.91	2.03	1.91	1.92
6151	NYSE	NAT	Wed, Jul 6, 2022	1.95	2.00	1.80	1.86
6150	NYSE	NAT	Tue, Jul 5, 2022	2.03	2.05	1.92	1.96
6149	NYSE	NAT	Fri, Jul 1, 2022	2.12	2.15	1.99	2.07
6148	NYSE	NAT	Thu, Jun 30, 2022	2.07	2.16	2.05	2.13
6147	NYSE	NAT	Wed, Jun 29, 2022	2.19	2.23	2.07	2.13
6146	NYSE	NAT	Tue, Jun 28, 2022	2.28	2.33	2.16	2.21
6145	NYSE	NAT	Mon, Jun 27, 2022	2.17	2.27	2.13	2.23
6144	NYSE	NAT	Fri, Jun 24, 2022	2.06	2.22	2.02	2.14
6143	NYSE	NAT	Thu, Jun 23, 2022	2.03	2.08	1.96	2.04
6142	NYSE	NAT	Wed, Jun 22, 2022	1.96	2.09	1.95	2.03
6141	NYSE	NAT	Tue, Jun 21, 2022	1.91	2.15	1.89	2.09
6140	NYSE	NAT	Fri, Jun 17, 2022	1.99	2.02	1.87	1.89
6139	NYSE	NAT	Thu, Jun 16, 2022	1.97	2.06	1.91	1.95
6138	NYSE	NAT	Wed, Jun 15, 2022	2.00	2.10	1.95	2.06
6137	NYSE	NAT	Tue, Jun 14, 2022	1.95	2.08	1.92	2.01
6136	NYSE	NAT	Mon, Jun 13, 2022	1.94	2.04	1.88	1.95
6135	NYSE	NAT	Fri, Jun 10, 2022	2.00	2.14	1.98	2.06
6134	NYSE	NAT	Thu, Jun 9, 2022	2.10	2.16	2.01	2.02
6133	NYSE	NAT	Wed, Jun 8, 2022	2.27	2.29	2.14	2.18
6132	NYSE	NAT	Tue, Jun 7, 2022	2.10	2.32	2.08	2.31
6131	NYSE	NAT	Mon, Jun 6, 2022	2.16	2.22	2.10	2.16
6130	NYSE	NAT	Fri, Jun 3, 2022	2.08	2.18	2.07	2.18
6129	NYSE	NAT	Thu, Jun 2, 2022	2.08	2.17	2.01	2.04
6128	NYSE	NAT	Wed, Jun 1, 2022	2.09	2.15	1.95	2.11
6127	NYSE	NAT	Tue, May 31, 2022	2.32	2.32	2.01	2.05
6126	NYSE	NAT	Fri, May 27, 2022	2.17	2.33	2.11	2.30
6125	NYSE	NAT	Thu, May 26, 2022	2.24	2.26	2.15	2.21
6124	NYSE	NAT	Wed, May 25, 2022	2.16	2.24	2.06	2.24
6123	NYSE	NAT	Tue, May 24, 2022	2.38	2.38	2.15	2.16
6122	NYSE	NAT	Mon, May 23, 2022	2.32	2.38	2.10	2.37
6121	NYSE	NAT	Fri, May 20, 2022	2.84	2.89	2.66	2.67
6120	NYSE	NAT	Thu, May 19, 2022	2.61	2.84	2.57	2.80
6119	NYSE	NAT	Wed, May 18, 2022	2.65	2.77	2.58	2.62
6118	NYSE	NAT	Tue, May 17, 2022	2.75	2.78	2.59	2.62
6117	NYSE	NAT	Mon, May 16, 2022	2.59	2.80	2.55	2.76
6116	NYSE	NAT	Fri, May 13, 2022	2.41	2.54	2.38	2.51
6115	NYSE	NAT	Thu, May 12, 2022	2.25	2.32	2.14	2.29
6114	NYSE	NAT	Wed, May 11, 2022	2.35	2.48	2.27	2.34
6113	NYSE	NAT	Tue, May 10, 2022	2.26	2.41	2.26	2.37
6112	NYSE	NAT	Mon, May 9, 2022	2.36	2.36	2.07	2.13
6111	NYSE	NAT	Fri, May 6, 2022	2.70	2.70	2.46	2.51
6110	NYSE	NAT	Thu, May 5, 2022	2.74	2.75	2.58	2.70
6109	NYSE	NAT	Wed, May 4, 2022	2.73	2.80	2.58	2.72
6108	NYSE	NAT	Tue, May 3, 2022	2.42	2.69	2.40	2.65
6107	NYSE	NAT	Mon, May 2, 2022	2.55	2.61	2.39	2.49
6106	NYSE	NAT	Fri, Apr 29, 2022	2.74	2.76	2.55	2.56
6105	NYSE	NAT	Thu, Apr 28, 2022	2.94	2.95	2.60	2.74
6104	NYSE	NAT	Wed, Apr 27, 2022	2.69	2.91	2.61	2.88
6103	NYSE	NAT	Tue, Apr 26, 2022	2.61	2.68	2.46	2.55
6102	NYSE	NAT	Mon, Apr 25, 2022	2.57	2.64	2.35	2.44
6101	NYSE	NAT	Fri, Apr 22, 2022	3.10	3.19	2.75	2.79
6100	NYSE	NAT	Thu, Apr 21, 2022	3.00	3.35	2.81	2.91
6099	NYSE	NAT	Wed, Apr 20, 2022	2.73	2.91	2.48	2.89
6098	NYSE	NAT	Tue, Apr 19, 2022	2.83	2.84	2.59	2.63
6097	NYSE	NAT	Mon, Apr 18, 2022	2.82	2.88	2.68	2.83
6096	NYSE	NAT	Thu, Apr 14, 2022	2.86	2.90	2.70	2.70
6095	NYSE	NAT	Wed, Apr 13, 2022	2.64	2.87	2.64	2.81
6094	NYSE	NAT	Tue, Apr 12, 2022	2.69	2.69	2.46	2.58
6093	NYSE	NAT	Mon, Apr 11, 2022	2.91	2.93	2.59	2.64
6092	NYSE	NAT	Fri, Apr 8, 2022	2.73	2.93	2.69	2.84
6091	NYSE	NAT	Thu, Apr 7, 2022	2.71	2.84	2.52	2.61
6090	NYSE	NAT	Wed, Apr 6, 2022	2.44	2.59	2.34	2.51
6089	NYSE	NAT	Tue, Apr 5, 2022	2.36	2.45	2.33	2.38
6088	NYSE	NAT	Mon, Apr 4, 2022	2.20	2.36	2.16	2.21
6087	NYSE	NAT	Fri, Apr 1, 2022	2.14	2.19	2.09	2.18
6086	NYSE	NAT	Thu, Mar 31, 2022	2.07	2.20	2.06	2.13
6085	NYSE	NAT	Wed, Mar 30, 2022	1.89	2.13	1.88	2.05
6084	NYSE	NAT	Tue, Mar 29, 2022	1.80	1.86	1.74	1.85
6083	NYSE	NAT	Mon, Mar 28, 2022	1.86	1.90	1.79	1.80
6082	NYSE	NAT	Fri, Mar 25, 2022	1.88	1.94	1.82	1.89
6081	NYSE	NAT	Thu, Mar 24, 2022	1.89	1.94	1.83	1.84
6080	NYSE	NAT	Wed, Mar 23, 2022	1.85	1.95	1.81	1.89
6079	NYSE	NAT	Tue, Mar 22, 2022	1.88	1.90	1.84	1.87
6078	NYSE	NAT	Mon, Mar 21, 2022	1.92	1.93	1.85	1.86
6077	NYSE	NAT	Fri, Mar 18, 2022	1.92	1.95	1.85	1.92
6076	NYSE	NAT	Thu, Mar 17, 2022	1.91	1.98	1.90	1.94
6075	NYSE	NAT	Wed, Mar 16, 2022	1.83	1.93	1.83	1.90
6074	NYSE	NAT	Tue, Mar 15, 2022	1.86	1.92	1.78	1.87
6073	NYSE	NAT	Mon, Mar 14, 2022	2.00	2.04	1.87	1.92
6072	NYSE	NAT	Fri, Mar 11, 2022	2.15	2.19	2.02	2.02
6071	NYSE	NAT	Thu, Mar 10, 2022	2.17	2.23	2.12	2.19
6070	NYSE	NAT	Wed, Mar 9, 2022	2.21	2.23	2.02	2.14
6069	NYSE	NAT	Tue, Mar 8, 2022	2.33	2.38	2.11	2.14
6068	NYSE	NAT	Mon, Mar 7, 2022	2.30	2.48	2.30	2.31
6067	NYSE	NAT	Fri, Mar 4, 2022	2.19	2.27	2.10	2.27
6066	NYSE	NAT	Thu, Mar 3, 2022	2.28	2.29	2.08	2.22
6065	NYSE	NAT	Wed, Mar 2, 2022	2.38	2.40	2.18	2.26
6064	NYSE	NAT	Tue, Mar 1, 2022	2.44	2.55	2.15	2.30
6063	NYSE	NAT	Mon, Feb 28, 2022	2.04	2.45	2.04	2.42
6062	NYSE	NAT	Fri, Feb 25, 2022	1.75	1.95	1.73	1.92
6061	NYSE	NAT	Thu, Feb 24, 2022	1.56	1.71	1.56	1.71
6060	NYSE	NAT	Wed, Feb 23, 2022	1.54	1.59	1.52	1.56
6059	NYSE	NAT	Tue, Feb 22, 2022	1.57	1.62	1.54	1.54
6058	NYSE	NAT	Fri, Feb 18, 2022	1.59	1.62	1.52	1.55
6057	NYSE	NAT	Thu, Feb 17, 2022	1.48	1.60	1.48	1.57
6056	NYSE	NAT	Wed, Feb 16, 2022	1.43	1.50	1.43	1.48
6055	NYSE	NAT	Tue, Feb 15, 2022	1.48	1.50	1.42	1.44
6054	NYSE	NAT	Mon, Feb 14, 2022	1.56	1.60	1.47	1.47
6053	NYSE	NAT	Fri, Feb 11, 2022	1.50	1.59	1.50	1.55
6052	NYSE	NAT	Thu, Feb 10, 2022	1.48	1.56	1.47	1.49
6051	NYSE	NAT	Wed, Feb 9, 2022	1.49	1.54	1.47	1.49
6050	NYSE	NAT	Tue, Feb 8, 2022	1.48	1.48	1.40	1.41
6049	NYSE	NAT	Mon, Feb 7, 2022	1.45	1.49	1.44	1.46
6048	NYSE	NAT	Fri, Feb 4, 2022	1.43	1.45	1.40	1.44
6047	NYSE	NAT	Thu, Feb 3, 2022	1.47	1.48	1.41	1.41
6046	NYSE	NAT	Wed, Feb 2, 2022	1.59	1.61	1.48	1.49
6045	NYSE	NAT	Tue, Feb 1, 2022	1.55	1.60	1.54	1.57
6044	NYSE	NAT	Mon, Jan 31, 2022	1.53	1.55	1.48	1.55
6043	NYSE	NAT	Fri, Jan 28, 2022	1.50	1.55	1.46	1.51
6042	NYSE	NAT	Thu, Jan 27, 2022	1.52	1.57	1.48	1.50
6041	NYSE	NAT	Wed, Jan 26, 2022	1.57	1.60	1.47	1.48
6040	NYSE	NAT	Tue, Jan 25, 2022	1.51	1.55	1.47	1.53
6039	NYSE	NAT	Mon, Jan 24, 2022	1.53	1.56	1.42	1.52
6038	NYSE	NAT	Fri, Jan 21, 2022	1.63	1.64	1.54	1.54
6037	NYSE	NAT	Thu, Jan 20, 2022	1.67	1.71	1.63	1.63
6036	NYSE	NAT	Wed, Jan 19, 2022	1.67	1.70	1.65	1.65
6035	NYSE	NAT	Tue, Jan 18, 2022	1.72	1.75	1.66	1.66
6034	NYSE	NAT	Fri, Jan 14, 2022	1.71	1.75	1.70	1.72
6033	NYSE	NAT	Thu, Jan 13, 2022	1.73	1.76	1.70	1.74
6032	NYSE	NAT	Wed, Jan 12, 2022	1.82	1.84	1.73	1.73
6031	NYSE	NAT	Tue, Jan 11, 2022	1.75	1.82	1.74	1.79
6030	NYSE	NAT	Mon, Jan 10, 2022	1.77	1.79	1.74	1.75
6029	NYSE	NAT	Fri, Jan 7, 2022	1.78	1.81	1.76	1.78
6028	NYSE	NAT	Thu, Jan 6, 2022	1.82	1.84	1.77	1.78
6027	NYSE	NAT	Wed, Jan 5, 2022	1.84	1.87	1.78	1.79
6026	NYSE	NAT	Tue, Jan 4, 2022	1.90	1.90	1.82	1.85
6025	NYSE	NAT	Mon, Jan 3, 2022	1.71	1.95	1.70	1.94
6024	NYSE	NAT	Fri, Dec 31, 2021	1.65	1.71	1.65	1.69
6023	NYSE	NAT	Thu, Dec 30, 2021	1.65	1.72	1.65	1.66
6022	NYSE	NAT	Wed, Dec 29, 2021	1.71	1.72	1.65	1.67
6021	NYSE	NAT	Tue, Dec 28, 2021	1.74	1.77	1.67	1.69
6020	NYSE	NAT	Mon, Dec 27, 2021	1.79	1.82	1.74	1.75
6019	NYSE	NAT	Thu, Dec 23, 2021	1.80	1.83	1.77	1.79
6018	NYSE	NAT	Wed, Dec 22, 2021	1.78	1.82	1.76	1.80
6017	NYSE	NAT	Tue, Dec 21, 2021	1.84	1.87	1.78	1.79
6016	NYSE	NAT	Mon, Dec 20, 2021	1.77	1.83	1.73	1.83
6015	NYSE	NAT	Fri, Dec 17, 2021	1.86	1.88	1.77	1.83
6014	NYSE	NAT	Thu, Dec 16, 2021	1.93	1.96	1.85	1.87
6013	NYSE	NAT	Wed, Dec 15, 2021	1.87	1.95	1.84	1.91
6012	NYSE	NAT	Tue, Dec 14, 2021	1.92	1.93	1.86	1.87
6011	NYSE	NAT	Mon, Dec 13, 2021	1.98	2.00	1.91	1.97
6010	NYSE	NAT	Fri, Dec 10, 2021	2.02	2.05	2.00	2.01
6009	NYSE	NAT	Thu, Dec 9, 2021	2.04	2.05	1.96	2.02
6008	NYSE	NAT	Wed, Dec 8, 2021	1.96	2.10	1.92	2.09
6007	NYSE	NAT	Tue, Dec 7, 2021	1.85	2.01	1.85	1.98
6006	NYSE	NAT	Mon, Dec 6, 2021	1.81	1.90	1.77	1.83
6005	NYSE	NAT	Fri, Dec 3, 2021	1.88	1.89	1.79	1.80
6004	NYSE	NAT	Thu, Dec 2, 2021	1.87	1.91	1.83	1.87
6003	NYSE	NAT	Wed, Dec 1, 2021	1.96	1.97	1.78	1.81
6002	NYSE	NAT	Tue, Nov 30, 2021	1.85	1.99	1.85	1.98
6001	NYSE	NAT	Mon, Nov 29, 2021	1.87	1.93	1.84	1.85
6000	NYSE	NAT	Fri, Nov 26, 2021	1.86	1.87	1.79	1.86
5999	NYSE	NAT	Wed, Nov 24, 2021	1.87	1.94	1.86	1.92
5998	NYSE	NAT	Tue, Nov 23, 2021	1.88	1.92	1.83	1.91
5997	NYSE	NAT	Mon, Nov 22, 2021	1.95	1.95	1.86	1.86
5996	NYSE	NAT	Fri, Nov 19, 2021	1.98	2.01	1.92	1.93
5995	NYSE	NAT	Thu, Nov 18, 2021	2.07	2.08	1.94	1.98
5994	NYSE	NAT	Wed, Nov 17, 2021	2.10	2.15	2.05	2.06
5993	NYSE	NAT	Tue, Nov 16, 2021	2.15	2.17	2.10	2.10
5992	NYSE	NAT	Mon, Nov 15, 2021	2.20	2.21	2.09	2.17
5991	NYSE	NAT	Fri, Nov 12, 2021	2.20	2.23	2.17	2.18
5990	NYSE	NAT	Thu, Nov 11, 2021	2.20	2.31	2.20	2.21
5989	NYSE	NAT	Wed, Nov 10, 2021	2.27	2.28	2.17	2.19
5988	NYSE	NAT	Tue, Nov 9, 2021	2.29	2.30	2.24	2.28
5987	NYSE	NAT	Mon, Nov 8, 2021	2.33	2.38	2.28	2.29
5986	NYSE	NAT	Fri, Nov 5, 2021	2.31	2.35	2.26	2.34
5985	NYSE	NAT	Thu, Nov 4, 2021	2.34	2.40	2.28	2.29
5984	NYSE	NAT	Wed, Nov 3, 2021	2.30	2.36	2.29	2.32
5983	NYSE	NAT	Tue, Nov 2, 2021	2.40	2.41	2.30	2.32
5982	NYSE	NAT	Mon, Nov 1, 2021	2.34	2.43	2.34	2.39
5981	NYSE	NAT	Fri, Oct 29, 2021	2.33	2.36	2.30	2.35
5980	NYSE	NAT	Thu, Oct 28, 2021	2.29	2.36	2.29	2.31
5979	NYSE	NAT	Wed, Oct 27, 2021	2.35	2.38	2.28	2.30
5978	NYSE	NAT	Tue, Oct 26, 2021	2.41	2.42	2.36	2.36
5977	NYSE	NAT	Mon, Oct 25, 2021	2.38	2.43	2.37	2.41
5976	NYSE	NAT	Fri, Oct 22, 2021	2.40	2.42	2.36	2.39
5975	NYSE	NAT	Thu, Oct 21, 2021	2.47	2.50	2.41	2.41
5974	NYSE	NAT	Wed, Oct 20, 2021	2.59	2.60	2.49	2.49
5973	NYSE	NAT	Tue, Oct 19, 2021	2.48	2.59	2.48	2.58
5972	NYSE	NAT	Mon, Oct 18, 2021	2.46	2.49	2.40	2.43
5971	NYSE	NAT	Fri, Oct 15, 2021	2.48	2.52	2.42	2.43
5970	NYSE	NAT	Thu, Oct 14, 2021	2.49	2.52	2.41	2.42
5969	NYSE	NAT	Wed, Oct 13, 2021	2.52	2.60	2.47	2.48
5968	NYSE	NAT	Tue, Oct 12, 2021	2.52	2.59	2.49	2.52
5967	NYSE	NAT	Mon, Oct 11, 2021	2.54	2.60	2.52	2.52
5966	NYSE	NAT	Fri, Oct 8, 2021	2.62	2.65	2.51	2.51
5965	NYSE	NAT	Thu, Oct 7, 2021	2.64	2.65	2.55	2.60
5964	NYSE	NAT	Wed, Oct 6, 2021	2.65	2.69	2.57	2.65
5963	NYSE	NAT	Tue, Oct 5, 2021	2.83	2.84	2.64	2.71
5962	NYSE	NAT	Mon, Oct 4, 2021	2.84	2.88	2.76	2.78
5961	NYSE	NAT	Fri, Oct 1, 2021	2.63	2.90	2.63	2.88
5960	NYSE	NAT	Thu, Sep 30, 2021	2.51	2.61	2.45	2.56
5959	NYSE	NAT	Wed, Sep 29, 2021	2.50	2.60	2.44	2.53
5958	NYSE	NAT	Tue, Sep 28, 2021	2.61	2.61	2.44	2.48
5957	NYSE	NAT	Mon, Sep 27, 2021	2.38	2.61	2.37	2.57
5956	NYSE	NAT	Fri, Sep 24, 2021	2.25	2.39	2.23	2.31
5955	NYSE	NAT	Thu, Sep 23, 2021	2.28	2.29	2.24	2.24
5954	NYSE	NAT	Wed, Sep 22, 2021	2.28	2.33	2.26	2.26
5953	NYSE	NAT	Tue, Sep 21, 2021	2.29	2.31	2.21	2.23
5952	NYSE	NAT	Mon, Sep 20, 2021	2.31	2.33	2.20	2.21
5951	NYSE	NAT	Fri, Sep 17, 2021	2.33	2.45	2.31	2.37
5950	NYSE	NAT	Thu, Sep 16, 2021	2.40	2.40	2.32	2.32
5949	NYSE	NAT	Wed, Sep 15, 2021	2.31	2.40	2.29	2.40
5948	NYSE	NAT	Tue, Sep 14, 2021	2.41	2.42	2.30	2.30
5947	NYSE	NAT	Mon, Sep 13, 2021	2.36	2.45	2.35	2.37
5946	NYSE	NAT	Fri, Sep 10, 2021	2.43	2.45	2.36	2.36
5945	NYSE	NAT	Thu, Sep 9, 2021	2.37	2.49	2.37	2.40
5944	NYSE	NAT	Wed, Sep 8, 2021	2.48	2.49	2.36	2.38
5943	NYSE	NAT	Tue, Sep 7, 2021	2.55	2.61	2.46	2.47
5942	NYSE	NAT	Fri, Sep 3, 2021	2.62	2.62	2.51	2.54
5941	NYSE	NAT	Thu, Sep 2, 2021	2.54	2.60	2.51	2.60
5940	NYSE	NAT	Wed, Sep 1, 2021	2.38	2.54	2.38	2.52
5939	NYSE	NAT	Tue, Aug 31, 2021	2.27	2.39	2.25	2.37
5938	NYSE	NAT	Mon, Aug 30, 2021	2.35	2.37	2.24	2.26
5937	NYSE	NAT	Fri, Aug 27, 2021	2.33	2.36	2.30	2.33
5936	NYSE	NAT	Thu, Aug 26, 2021	2.37	2.37	2.25	2.27
5935	NYSE	NAT	Wed, Aug 25, 2021	2.29	2.40	2.27	2.37
5934	NYSE	NAT	Tue, Aug 24, 2021	2.30	2.32	2.28	2.30
5933	NYSE	NAT	Mon, Aug 23, 2021	2.21	2.28	2.20	2.28
5932	NYSE	NAT	Fri, Aug 20, 2021	2.11	2.22	2.09	2.19
5931	NYSE	NAT	Thu, Aug 19, 2021	2.12	2.16	2.08	2.10
5930	NYSE	NAT	Wed, Aug 18, 2021	2.21	2.22	2.11	2.12
5929	NYSE	NAT	Tue, Aug 17, 2021	2.12	2.26	2.11	2.17
5928	NYSE	NAT	Mon, Aug 16, 2021	2.20	2.22	2.13	2.14
5927	NYSE	NAT	Fri, Aug 13, 2021	2.26	2.28	2.21	2.23
5926	NYSE	NAT	Thu, Aug 12, 2021	2.36	2.36	2.25	2.26
5925	NYSE	NAT	Wed, Aug 11, 2021	2.36	2.41	2.29	2.35
5924	NYSE	NAT	Tue, Aug 10, 2021	2.32	2.37	2.26	2.36
5923	NYSE	NAT	Mon, Aug 9, 2021	2.42	2.43	2.29	2.30
5922	NYSE	NAT	Fri, Aug 6, 2021	2.43	2.45	2.40	2.42
5921	NYSE	NAT	Thu, Aug 5, 2021	2.47	2.49	2.41	2.42
5920	NYSE	NAT	Wed, Aug 4, 2021	2.50	2.54	2.45	2.47
5919	NYSE	NAT	Tue, Aug 3, 2021	2.55	2.56	2.46	2.53
5918	NYSE	NAT	Mon, Aug 2, 2021	2.61	2.64	2.53	2.55
5917	NYSE	NAT	Fri, Jul 30, 2021	2.64	2.68	2.59	2.61
5916	NYSE	NAT	Thu, Jul 29, 2021	2.64	2.68	2.63	2.64
5915	NYSE	NAT	Wed, Jul 28, 2021	2.59	2.65	2.59	2.62
5914	NYSE	NAT	Tue, Jul 27, 2021	2.63	2.64	2.55	2.59
5913	NYSE	NAT	Mon, Jul 26, 2021	2.65	2.72	2.63	2.65
5912	NYSE	NAT	Fri, Jul 23, 2021	2.68	2.69	2.61	2.62
5911	NYSE	NAT	Thu, Jul 22, 2021	2.79	2.79	2.65	2.67
5910	NYSE	NAT	Wed, Jul 21, 2021	2.72	2.81	2.71	2.79
5909	NYSE	NAT	Tue, Jul 20, 2021	2.64	2.70	2.59	2.68
5908	NYSE	NAT	Mon, Jul 19, 2021	2.70	2.72	2.59	2.60
5907	NYSE	NAT	Fri, Jul 16, 2021	2.89	2.89	2.69	2.70
5906	NYSE	NAT	Thu, Jul 15, 2021	2.94	2.94	2.81	2.85
5905	NYSE	NAT	Wed, Jul 14, 2021	2.96	3.00	2.88	2.91
5904	NYSE	NAT	Tue, Jul 13, 2021	3.00	3.02	2.90	2.93
5903	NYSE	NAT	Mon, Jul 12, 2021	3.03	3.04	2.95	2.99
5902	NYSE	NAT	Fri, Jul 9, 2021	3.03	3.08	3.00	3.07
5901	NYSE	NAT	Thu, Jul 8, 2021	3.04	3.08	3.00	3.00
5900	NYSE	NAT	Wed, Jul 7, 2021	3.17	3.19	3.05	3.07
5899	NYSE	NAT	Tue, Jul 6, 2021	3.22	3.25	3.17	3.18
5898	NYSE	NAT	Fri, Jul 2, 2021	3.20	3.23	3.14	3.16
5897	NYSE	NAT	Thu, Jul 1, 2021	3.34	3.34	3.18	3.18
5896	NYSE	NAT	Wed, Jun 30, 2021	3.29	3.33	3.26	3.28
5895	NYSE	NAT	Tue, Jun 29, 2021	3.26	3.30	3.24	3.26
5894	NYSE	NAT	Mon, Jun 28, 2021	3.43	3.43	3.23	3.25
5893	NYSE	NAT	Fri, Jun 25, 2021	3.45	3.48	3.41	3.41
5892	NYSE	NAT	Thu, Jun 24, 2021	3.45	3.47	3.43	3.45
5891	NYSE	NAT	Wed, Jun 23, 2021	3.42	3.49	3.42	3.46
5890	NYSE	NAT	Tue, Jun 22, 2021	3.43	3.44	3.37	3.43
5889	NYSE	NAT	Mon, Jun 21, 2021	3.41	3.50	3.41	3.45
5888	NYSE	NAT	Fri, Jun 18, 2021	3.42	3.49	3.39	3.44
5887	NYSE	NAT	Thu, Jun 17, 2021	3.50	3.55	3.38	3.46
5886	NYSE	NAT	Wed, Jun 16, 2021	3.50	3.56	3.50	3.54
5885	NYSE	NAT	Tue, Jun 15, 2021	3.52	3.54	3.39	3.54
5884	NYSE	NAT	Mon, Jun 14, 2021	3.55	3.63	3.51	3.51
5883	NYSE	NAT	Fri, Jun 11, 2021	3.54	3.64	3.53	3.55
5882	NYSE	NAT	Thu, Jun 10, 2021	3.50	3.59	3.50	3.55
5881	NYSE	NAT	Wed, Jun 9, 2021	3.48	3.52	3.43	3.46
5880	NYSE	NAT	Tue, Jun 8, 2021	3.53	3.55	3.46	3.52
5879	NYSE	NAT	Mon, Jun 7, 2021	3.42	3.55	3.41	3.53
5878	NYSE	NAT	Fri, Jun 4, 2021	3.55	3.58	3.42	3.43
5877	NYSE	NAT	Thu, Jun 3, 2021	3.59	3.63	3.51	3.55
5876	NYSE	NAT	Wed, Jun 2, 2021	3.81	3.81	3.61	3.61
5875	NYSE	NAT	Tue, Jun 1, 2021	3.55	3.81	3.54	3.76
5874	NYSE	NAT	Fri, May 28, 2021	3.50	3.55	3.46	3.48
5873	NYSE	NAT	Thu, May 27, 2021	3.66	3.69	3.49	3.49
5872	NYSE	NAT	Wed, May 26, 2021	3.58	3.69	3.58	3.66
5871	NYSE	NAT	Tue, May 25, 2021	3.59	3.68	3.47	3.60
5870	NYSE	NAT	Mon, May 24, 2021	3.58	3.60	3.47	3.57
5869	NYSE	NAT	Fri, May 21, 2021	3.48	3.65	3.47	3.56
5868	NYSE	NAT	Thu, May 20, 2021	3.43	3.47	3.31	3.47
5867	NYSE	NAT	Wed, May 19, 2021	3.40	3.47	3.30	3.45
5866	NYSE	NAT	Tue, May 18, 2021	3.40	3.50	3.38	3.44
5865	NYSE	NAT	Mon, May 17, 2021	3.30	3.41	3.26	3.38
5864	NYSE	NAT	Fri, May 14, 2021	3.29	3.37	3.28	3.31
5863	NYSE	NAT	Thu, May 13, 2021	3.26	3.33	3.20	3.25
5862	NYSE	NAT	Wed, May 12, 2021	3.34	3.37	3.27	3.28
5861	NYSE	NAT	Tue, May 11, 2021	3.30	3.35	3.22	3.30
5860	NYSE	NAT	Mon, May 10, 2021	3.45	3.51	3.35	3.36
5859	NYSE	NAT	Fri, May 7, 2021	3.30	3.54	3.30	3.42
5858	NYSE	NAT	Thu, May 6, 2021	3.36	3.36	3.25	3.34
5857	NYSE	NAT	Wed, May 5, 2021	3.34	3.35	3.28	3.35
5856	NYSE	NAT	Tue, May 4, 2021	3.45	3.49	3.28	3.29
5855	NYSE	NAT	Mon, May 3, 2021	3.34	3.48	3.33	3.43
5854	NYSE	NAT	Fri, Apr 30, 2021	3.35	3.41	3.30	3.31
5853	NYSE	NAT	Thu, Apr 29, 2021	3.37	3.47	3.35	3.40
5852	NYSE	NAT	Wed, Apr 28, 2021	3.18	3.36	3.17	3.33
5851	NYSE	NAT	Tue, Apr 27, 2021	3.22	3.25	3.13	3.18
5850	NYSE	NAT	Mon, Apr 26, 2021	3.18	3.23	3.15	3.20
5849	NYSE	NAT	Fri, Apr 23, 2021	3.17	3.23	3.13	3.15
5848	NYSE	NAT	Thu, Apr 22, 2021	3.27	3.27	3.14	3.15
5847	NYSE	NAT	Wed, Apr 21, 2021	3.11	3.23	3.07	3.23
5846	NYSE	NAT	Tue, Apr 20, 2021	3.22	3.27	3.07	3.12
5845	NYSE	NAT	Mon, Apr 19, 2021	3.17	3.27	3.17	3.20
5844	NYSE	NAT	Fri, Apr 16, 2021	3.15	3.21	3.13	3.18
5843	NYSE	NAT	Thu, Apr 15, 2021	3.18	3.18	3.07	3.14
5842	NYSE	NAT	Wed, Apr 14, 2021	3.12	3.19	3.09	3.11
5841	NYSE	NAT	Tue, Apr 13, 2021	3.13	3.15	3.02	3.10
5840	NYSE	NAT	Mon, Apr 12, 2021	3.30	3.31	3.11	3.13
5839	NYSE	NAT	Fri, Apr 9, 2021	3.38	3.39	3.22	3.29
5838	NYSE	NAT	Thu, Apr 8, 2021	3.45	3.47	3.37	3.39
5837	NYSE	NAT	Wed, Apr 7, 2021	3.40	3.59	3.36	3.44
5836	NYSE	NAT	Tue, Apr 6, 2021	3.28	3.52	3.23	3.42
5835	NYSE	NAT	Mon, Apr 5, 2021	3.45	3.46	3.19	3.25
5834	NYSE	NAT	Thu, Apr 1, 2021	3.30	3.42	3.25	3.42
5833	NYSE	NAT	Wed, Mar 31, 2021	3.35	3.41	3.18	3.25
5832	NYSE	NAT	Tue, Mar 30, 2021	3.43	3.45	3.23	3.30
5831	NYSE	NAT	Mon, Mar 29, 2021	3.78	3.78	3.35	3.41
5830	NYSE	NAT	Fri, Mar 26, 2021	3.51	4.05	3.51	3.88
5829	NYSE	NAT	Thu, Mar 25, 2021	3.29	3.41	3.20	3.38
5828	NYSE	NAT	Wed, Mar 24, 2021	3.36	3.47	3.31	3.32
5827	NYSE	NAT	Tue, Mar 23, 2021	3.46	3.49	3.28	3.30
5826	NYSE	NAT	Mon, Mar 22, 2021	3.65	3.68	3.52	3.52
5825	NYSE	NAT	Fri, Mar 19, 2021	3.45	3.65	3.39	3.65
5824	NYSE	NAT	Thu, Mar 18, 2021	3.57	3.72	3.43	3.45
5823	NYSE	NAT	Wed, Mar 17, 2021	3.45	3.60	3.41	3.58
5822	NYSE	NAT	Tue, Mar 16, 2021	3.58	3.60	3.49	3.51
5821	NYSE	NAT	Mon, Mar 15, 2021	3.54	3.70	3.50	3.62
5820	NYSE	NAT	Fri, Mar 12, 2021	3.45	3.54	3.43	3.52
5819	NYSE	NAT	Thu, Mar 11, 2021	3.54	3.57	3.41	3.48
5818	NYSE	NAT	Wed, Mar 10, 2021	3.21	3.54	3.19	3.51
5817	NYSE	NAT	Tue, Mar 9, 2021	3.20	3.27	3.17	3.18
5816	NYSE	NAT	Mon, Mar 8, 2021	3.24	3.24	3.09	3.22
5815	NYSE	NAT	Fri, Mar 5, 2021	3.27	3.27	3.04	3.22
5814	NYSE	NAT	Thu, Mar 4, 2021	3.34	3.36	3.11	3.20
5813	NYSE	NAT	Wed, Mar 3, 2021	3.25	3.43	3.24	3.31
5812	NYSE	NAT	Tue, Mar 2, 2021	3.22	3.38	3.20	3.20
5811	NYSE	NAT	Mon, Mar 1, 2021	3.13	3.24	3.08	3.20
5810	NYSE	NAT	Fri, Feb 26, 2021	3.16	3.28	2.95	2.97
5809	NYSE	NAT	Thu, Feb 25, 2021	3.34	3.45	3.20	3.20
5808	NYSE	NAT	Wed, Feb 24, 2021	3.24	3.38	3.22	3.33
5807	NYSE	NAT	Tue, Feb 23, 2021	3.25	3.29	3.09	3.18
5806	NYSE	NAT	Mon, Feb 22, 2021	3.39	3.46	3.30	3.31
5805	NYSE	NAT	Fri, Feb 19, 2021	3.33	3.42	3.30	3.34
5804	NYSE	NAT	Thu, Feb 18, 2021	3.52	3.52	3.30	3.31
5803	NYSE	NAT	Wed, Feb 17, 2021	3.64	3.67	3.49	3.60
5802	NYSE	NAT	Tue, Feb 16, 2021	3.72	3.89	3.53	3.68
5801	NYSE	NAT	Fri, Feb 12, 2021	3.23	3.70	3.21	3.68
5800	NYSE	NAT	Thu, Feb 11, 2021	3.29	3.29	3.14	3.22
5799	NYSE	NAT	Wed, Feb 10, 2021	3.18	3.33	3.15	3.26
5798	NYSE	NAT	Tue, Feb 9, 2021	3.17	3.18	3.06	3.14
5797	NYSE	NAT	Mon, Feb 8, 2021	3.23	3.26	3.12	3.16
5796	NYSE	NAT	Fri, Feb 5, 2021	3.21	3.24	3.14	3.20
5795	NYSE	NAT	Thu, Feb 4, 2021	3.20	3.31	3.12	3.16
5794	NYSE	NAT	Wed, Feb 3, 2021	3.02	3.18	3.02	3.17
5793	NYSE	NAT	Tue, Feb 2, 2021	3.13	3.13	3.00	3.03
5792	NYSE	NAT	Mon, Feb 1, 2021	3.02	3.15	2.98	3.09
5791	NYSE	NAT	Fri, Jan 29, 2021	2.85	3.20	2.84	2.96
5790	NYSE	NAT	Thu, Jan 28, 2021	2.92	2.96	2.81	2.85
5789	NYSE	NAT	Wed, Jan 27, 2021	2.86	2.99	2.83	2.92
5788	NYSE	NAT	Tue, Jan 26, 2021	2.86	2.94	2.85	2.91
5787	NYSE	NAT	Mon, Jan 25, 2021	2.87	2.88	2.75	2.87
5786	NYSE	NAT	Fri, Jan 22, 2021	2.86	2.89	2.83	2.87
5785	NYSE	NAT	Thu, Jan 21, 2021	2.90	2.90	2.83	2.88
5784	NYSE	NAT	Wed, Jan 20, 2021	2.94	2.97	2.84	2.86
5783	NYSE	NAT	Tue, Jan 19, 2021	2.98	3.00	2.88	2.91
5782	NYSE	NAT	Fri, Jan 15, 2021	3.02	3.03	2.95	2.98
5781	NYSE	NAT	Thu, Jan 14, 2021	3.03	3.07	3.00	3.05
5780	NYSE	NAT	Wed, Jan 13, 2021	3.04	3.05	3.00	3.01
5779	NYSE	NAT	Tue, Jan 12, 2021	3.01	3.11	2.98	3.04
5778	NYSE	NAT	Mon, Jan 11, 2021	3.02	3.04	2.92	2.98
5777	NYSE	NAT	Fri, Jan 8, 2021	3.11	3.15	3.02	3.02
5776	NYSE	NAT	Thu, Jan 7, 2021	3.05	3.14	3.05	3.07
5775	NYSE	NAT	Wed, Jan 6, 2021	3.12	3.15	3.00	3.03
5774	NYSE	NAT	Tue, Jan 5, 2021	3.09	3.15	3.03	3.05
5773	NYSE	NAT	Mon, Jan 4, 2021	2.97	3.11	2.97	3.09
5772	NYSE	NAT	Thu, Dec 31, 2020	3.01	3.03	2.92	2.95
5771	NYSE	NAT	Wed, Dec 30, 2020	3.04	3.10	3.00	3.01
5770	NYSE	NAT	Tue, Dec 29, 2020	3.07	3.08	3.00	3.06
5769	NYSE	NAT	Mon, Dec 28, 2020	3.17	3.19	3.06	3.08
5768	NYSE	NAT	Thu, Dec 24, 2020	3.12	3.17	3.10	3.16
5767	NYSE	NAT	Wed, Dec 23, 2020	3.12	3.24	3.11	3.15
5766	NYSE	NAT	Tue, Dec 22, 2020	3.17	3.18	3.08	3.08
5765	NYSE	NAT	Mon, Dec 21, 2020	3.15	3.19	3.09	3.17
5764	NYSE	NAT	Fri, Dec 18, 2020	3.32	3.35	3.25	3.25
5763	NYSE	NAT	Thu, Dec 17, 2020	3.32	3.38	3.29	3.32
5762	NYSE	NAT	Wed, Dec 16, 2020	3.37	3.39	3.31	3.32
5761	NYSE	NAT	Tue, Dec 15, 2020	3.35	3.41	3.29	3.34
5760	NYSE	NAT	Mon, Dec 14, 2020	3.46	3.47	3.30	3.30
5759	NYSE	NAT	Fri, Dec 11, 2020	3.50	3.52	3.36	3.42
5758	NYSE	NAT	Thu, Dec 10, 2020	3.21	3.51	3.20	3.50
5757	NYSE	NAT	Wed, Dec 9, 2020	3.26	3.27	3.17	3.19
5756	NYSE	NAT	Tue, Dec 8, 2020	3.26	3.31	3.22	3.25
5755	NYSE	NAT	Mon, Dec 7, 2020	3.45	3.46	3.26	3.29
5754	NYSE	NAT	Fri, Dec 4, 2020	3.26	3.54	3.26	3.47
5753	NYSE	NAT	Thu, Dec 3, 2020	3.16	3.28	3.16	3.23
5752	NYSE	NAT	Wed, Dec 2, 2020	3.06	3.30	3.05	3.15
5751	NYSE	NAT	Tue, Dec 1, 2020	3.22	3.23	3.05	3.05
5750	NYSE	NAT	Mon, Nov 30, 2020	3.35	3.36	3.18	3.15
5749	NYSE	NAT	Fri, Nov 27, 2020	3.40	3.41	3.30	3.32
5748	NYSE	NAT	Wed, Nov 25, 2020	3.40	3.46	3.30	3.38
5747	NYSE	NAT	Tue, Nov 24, 2020	3.40	3.51	3.39	3.41
5746	NYSE	NAT	Mon, Nov 23, 2020	3.30	3.43	3.27	3.37
5745	NYSE	NAT	Fri, Nov 20, 2020	3.23	3.31	3.19	3.31
5744	NYSE	NAT	Thu, Nov 19, 2020	3.11	3.25	3.09	3.25
5743	NYSE	NAT	Wed, Nov 18, 2020	3.27	3.28	3.08	3.08
5742	NYSE	NAT	Tue, Nov 17, 2020	3.20	3.30	3.14	3.27
5741	NYSE	NAT	Mon, Nov 16, 2020	3.17	3.27	3.05	3.26
5740	NYSE	NAT	Fri, Nov 13, 2020	3.10	3.22	3.04	3.18
5739	NYSE	NAT	Thu, Nov 12, 2020	3.25	3.25	3.01	3.05
5738	NYSE	NAT	Wed, Nov 11, 2020	3.32	3.33	3.23	3.25
5737	NYSE	NAT	Tue, Nov 10, 2020	3.17	3.33	3.17	3.28
5736	NYSE	NAT	Mon, Nov 9, 2020	3.10	3.22	3.08	3.13
5735	NYSE	NAT	Fri, Nov 6, 2020	3.01	3.09	2.89	2.91
5734	NYSE	NAT	Thu, Nov 5, 2020	2.93	3.06	2.89	2.99
5733	NYSE	NAT	Wed, Nov 4, 2020	2.96	2.98	2.84	2.89
5732	NYSE	NAT	Tue, Nov 3, 2020	3.06	3.11	2.91	2.95
5731	NYSE	NAT	Mon, Nov 2, 2020	2.95	3.07	2.93	3.00
5730	NYSE	NAT	Fri, Oct 30, 2020	2.97	2.97	2.80	2.91
5729	NYSE	NAT	Thu, Oct 29, 2020	2.92	3.00	2.75	2.99
5728	NYSE	NAT	Wed, Oct 28, 2020	3.00	3.00	2.86	2.90
5727	NYSE	NAT	Tue, Oct 27, 2020	3.14	3.17	3.03	3.05
5726	NYSE	NAT	Mon, Oct 26, 2020	3.11	3.16	3.01	3.13
5725	NYSE	NAT	Fri, Oct 23, 2020	3.26	3.29	3.13	3.17
5724	NYSE	NAT	Thu, Oct 22, 2020	3.31	3.35	3.26	3.28
5723	NYSE	NAT	Wed, Oct 21, 2020	3.35	3.35	3.26	3.30
5722	NYSE	NAT	Tue, Oct 20, 2020	3.42	3.43	3.37	3.39
5721	NYSE	NAT	Mon, Oct 19, 2020	3.53	3.55	3.37	3.38
5720	NYSE	NAT	Fri, Oct 16, 2020	3.63	3.63	3.50	3.50
5719	NYSE	NAT	Thu, Oct 15, 2020	3.55	3.69	3.53	3.65
5718	NYSE	NAT	Wed, Oct 14, 2020	3.55	3.67	3.54	3.61
5717	NYSE	NAT	Tue, Oct 13, 2020	3.48	3.57	3.43	3.56
5716	NYSE	NAT	Mon, Oct 12, 2020	3.63	3.65	3.47	3.51
5715	NYSE	NAT	Fri, Oct 9, 2020	3.70	3.75	3.61	3.65
5714	NYSE	NAT	Thu, Oct 8, 2020	3.55	3.68	3.55	3.67
5713	NYSE	NAT	Wed, Oct 7, 2020	3.59	3.60	3.50	3.55
5712	NYSE	NAT	Tue, Oct 6, 2020	3.67	3.76	3.54	3.54
5711	NYSE	NAT	Mon, Oct 5, 2020	3.56	3.72	3.55	3.69
5710	NYSE	NAT	Fri, Oct 2, 2020	3.43	3.60	3.42	3.54
5709	NYSE	NAT	Thu, Oct 1, 2020	3.48	3.57	3.45	3.53
5708	NYSE	NAT	Wed, Sep 30, 2020	3.45	3.59	3.43	3.49
5707	NYSE	NAT	Tue, Sep 29, 2020	3.46	3.52	3.38	3.46
5706	NYSE	NAT	Mon, Sep 28, 2020	3.57	3.58	3.42	3.46
5705	NYSE	NAT	Fri, Sep 25, 2020	3.42	3.54	3.36	3.50
5704	NYSE	NAT	Thu, Sep 24, 2020	3.50	3.52	3.33	3.42
5703	NYSE	NAT	Wed, Sep 23, 2020	3.67	3.74	3.50	3.52
5702	NYSE	NAT	Tue, Sep 22, 2020	3.67	3.70	3.59	3.68
5701	NYSE	NAT	Mon, Sep 21, 2020	3.66	3.70	3.60	3.64
5700	NYSE	NAT	Fri, Sep 18, 2020	3.88	3.90	3.81	3.85
5699	NYSE	NAT	Thu, Sep 17, 2020	3.86	3.96	3.82	3.85
5698	NYSE	NAT	Wed, Sep 16, 2020	3.89	4.00	3.88	3.91
5697	NYSE	NAT	Tue, Sep 15, 2020	4.08	4.11	3.85	3.88
5696	NYSE	NAT	Mon, Sep 14, 2020	4.01	4.10	3.92	4.10
5695	NYSE	NAT	Fri, Sep 11, 2020	3.91	4.11	3.89	3.98
5694	NYSE	NAT	Thu, Sep 10, 2020	3.85	3.96	3.85	3.89
5693	NYSE	NAT	Wed, Sep 9, 2020	3.86	3.95	3.82	3.93
5692	NYSE	NAT	Tue, Sep 8, 2020	3.67	3.93	3.65	3.81
5691	NYSE	NAT	Fri, Sep 4, 2020	3.79	3.79	3.41	3.69
5690	NYSE	NAT	Thu, Sep 3, 2020	3.88	3.94	3.72	3.74
5689	NYSE	NAT	Wed, Sep 2, 2020	4.15	4.18	3.96	4.00
5688	NYSE	NAT	Tue, Sep 1, 2020	4.35	4.36	4.18	4.21
5687	NYSE	NAT	Mon, Aug 31, 2020	4.27	4.41	4.16	4.36
5686	NYSE	NAT	Fri, Aug 28, 2020	4.11	4.36	4.06	4.33
5685	NYSE	NAT	Thu, Aug 27, 2020	4.11	4.17	4.06	4.13
5684	NYSE	NAT	Wed, Aug 26, 2020	4.50	4.53	4.25	4.12
5683	NYSE	NAT	Tue, Aug 25, 2020	4.40	4.52	4.37	4.51
5682	NYSE	NAT	Mon, Aug 24, 2020	4.32	4.37	4.24	4.35
5681	NYSE	NAT	Fri, Aug 21, 2020	4.27	4.38	4.27	4.32
5680	NYSE	NAT	Thu, Aug 20, 2020	4.28	4.33	4.25	4.28
5679	NYSE	NAT	Wed, Aug 19, 2020	4.30	4.38	4.27	4.30
5678	NYSE	NAT	Tue, Aug 18, 2020	4.38	4.42	4.22	4.33
5677	NYSE	NAT	Mon, Aug 17, 2020	4.63	4.63	4.34	4.42
5676	NYSE	NAT	Fri, Aug 14, 2020	4.42	4.54	4.33	4.50
5675	NYSE	NAT	Thu, Aug 13, 2020	4.69	4.78	4.42	4.48
5674	NYSE	NAT	Wed, Aug 12, 2020	4.56	4.73	4.54	4.69
5673	NYSE	NAT	Tue, Aug 11, 2020	4.50	4.69	4.47	4.48
5672	NYSE	NAT	Mon, Aug 10, 2020	4.51	4.59	4.45	4.46
5671	NYSE	NAT	Fri, Aug 7, 2020	4.48	4.55	4.41	4.54
5670	NYSE	NAT	Thu, Aug 6, 2020	4.49	4.63	4.47	4.50
5669	NYSE	NAT	Wed, Aug 5, 2020	4.55	4.58	4.49	4.49
5668	NYSE	NAT	Tue, Aug 4, 2020	4.52	4.61	4.47	4.54
5667	NYSE	NAT	Mon, Aug 3, 2020	4.52	4.60	4.41	4.48
5666	NYSE	NAT	Fri, Jul 31, 2020	4.43	4.57	4.31	4.55
5665	NYSE	NAT	Thu, Jul 30, 2020	4.48	4.49	4.28	4.36
5664	NYSE	NAT	Wed, Jul 29, 2020	4.37	4.59	4.35	4.56
5663	NYSE	NAT	Tue, Jul 28, 2020	4.39	4.44	4.29	4.37
5662	NYSE	NAT	Mon, Jul 27, 2020	4.31	4.41	4.21	4.41
5661	NYSE	NAT	Fri, Jul 24, 2020	4.23	4.33	4.21	4.25
5660	NYSE	NAT	Thu, Jul 23, 2020	4.20	4.36	4.19	4.30
5659	NYSE	NAT	Wed, Jul 22, 2020	4.19	4.29	4.10	4.29
5658	NYSE	NAT	Tue, Jul 21, 2020	4.34	4.36	4.14	4.16
5657	NYSE	NAT	Mon, Jul 20, 2020	4.45	4.45	4.34	4.37
5656	NYSE	NAT	Fri, Jul 17, 2020	4.28	4.45	4.26	4.45
5655	NYSE	NAT	Thu, Jul 16, 2020	4.50	4.54	4.33	4.33
5654	NYSE	NAT	Wed, Jul 15, 2020	4.62	4.73	4.43	4.55
5653	NYSE	NAT	Tue, Jul 14, 2020	4.30	4.67	4.27	4.63
5652	NYSE	NAT	Mon, Jul 13, 2020	4.46	4.57	4.25	4.35
5651	NYSE	NAT	Fri, Jul 10, 2020	4.08	4.46	4.08	4.40
5650	NYSE	NAT	Thu, Jul 9, 2020	4.20	4.25	4.06	4.06
5649	NYSE	NAT	Wed, Jul 8, 2020	4.07	4.25	4.03	4.24
5648	NYSE	NAT	Tue, Jul 7, 2020	4.11	4.19	4.05	4.05
5647	NYSE	NAT	Mon, Jul 6, 2020	4.15	4.23	4.07	4.18
5646	NYSE	NAT	Thu, Jul 2, 2020	4.21	4.26	4.02	4.06
5645	NYSE	NAT	Wed, Jul 1, 2020	4.06	4.26	4.00	4.21
5644	NYSE	NAT	Tue, Jun 30, 2020	4.10	4.10	3.97	4.06
5643	NYSE	NAT	Mon, Jun 29, 2020	4.10	4.26	4.03	4.21
5642	NYSE	NAT	Fri, Jun 26, 2020	4.31	4.32	4.07	4.10
5641	NYSE	NAT	Thu, Jun 25, 2020	4.15	4.37	4.14	4.32
5640	NYSE	NAT	Wed, Jun 24, 2020	4.25	4.28	4.05	4.25
5639	NYSE	NAT	Tue, Jun 23, 2020	4.35	4.37	4.24	4.28
5638	NYSE	NAT	Mon, Jun 22, 2020	4.38	4.41	4.26	4.31
5637	NYSE	NAT	Fri, Jun 19, 2020	4.56	4.58	4.35	4.45
5636	NYSE	NAT	Thu, Jun 18, 2020	4.55	4.62	4.47	4.49
5635	NYSE	NAT	Wed, Jun 17, 2020	4.74	4.77	4.48	4.50
5634	NYSE	NAT	Tue, Jun 16, 2020	5.05	5.06	4.72	4.78
5633	NYSE	NAT	Mon, Jun 15, 2020	4.69	4.99	4.65	4.97
5632	NYSE	NAT	Fri, Jun 12, 2020	4.94	4.95	4.72	4.88
5631	NYSE	NAT	Thu, Jun 11, 2020	4.89	5.01	4.67	4.71
5630	NYSE	NAT	Wed, Jun 10, 2020	5.31	5.38	5.08	5.20
5629	NYSE	NAT	Tue, Jun 9, 2020	5.25	5.26	4.89	5.12
5628	NYSE	NAT	Mon, Jun 8, 2020	4.75	5.40	4.73	5.38
5627	NYSE	NAT	Fri, Jun 5, 2020	4.47	4.75	4.42	4.72
5626	NYSE	NAT	Thu, Jun 4, 2020	4.38	4.41	4.31	4.38
5625	NYSE	NAT	Wed, Jun 3, 2020	4.47	4.51	4.40	4.42
5624	NYSE	NAT	Tue, Jun 2, 2020	4.47	4.50	4.28	4.48
5623	NYSE	NAT	Mon, Jun 1, 2020	4.53	4.63	4.47	4.47
5622	NYSE	NAT	Fri, May 29, 2020	4.50	4.59	4.48	4.57
5621	NYSE	NAT	Thu, May 28, 2020	4.77	4.88	4.50	4.52
5620	NYSE	NAT	Wed, May 27, 2020	4.52	4.79	4.43	4.76
5619	NYSE	NAT	Tue, May 26, 2020	4.53	4.56	4.27	4.41
5618	NYSE	NAT	Fri, May 22, 2020	4.57	4.61	4.41	4.48
5617	NYSE	NAT	Thu, May 21, 2020	4.76	4.86	4.63	4.61
5616	NYSE	NAT	Wed, May 20, 2020	4.58	4.92	4.45	4.72
5615	NYSE	NAT	Tue, May 19, 2020	4.87	4.89	4.43	4.51
5614	NYSE	NAT	Mon, May 18, 2020	5.25	5.25	4.75	4.84
5613	NYSE	NAT	Fri, May 15, 2020	4.92	5.05	4.85	5.03
5612	NYSE	NAT	Thu, May 14, 2020	5.01	5.01	4.75	4.94
5611	NYSE	NAT	Wed, May 13, 2020	4.90	5.08	4.73	4.95
5610	NYSE	NAT	Tue, May 12, 2020	4.96	5.10	4.88	4.89
5609	NYSE	NAT	Mon, May 11, 2020	5.01	5.11	4.85	5.07
5608	NYSE	NAT	Fri, May 8, 2020	5.21	5.50	5.01	5.12
5607	NYSE	NAT	Thu, May 7, 2020	5.05	5.33	4.71	5.28
5606	NYSE	NAT	Wed, May 6, 2020	5.31	5.34	4.92	4.97
5605	NYSE	NAT	Tue, May 5, 2020	5.91	5.95	5.20	5.25
5604	NYSE	NAT	Mon, May 4, 2020	5.96	6.08	5.79	6.06
5603	NYSE	NAT	Fri, May 1, 2020	6.00	6.38	5.83	6.12
5602	NYSE	NAT	Thu, Apr 30, 2020	6.02	6.49	5.80	6.02
5601	NYSE	NAT	Wed, Apr 29, 2020	6.87	6.93	6.00	6.29
5600	NYSE	NAT	Tue, Apr 28, 2020	8.03	9.00	7.05	7.34
5599	NYSE	NAT	Mon, Apr 27, 2020	6.54	7.25	6.45	7.20
5598	NYSE	NAT	Fri, Apr 24, 2020	5.53	5.89	5.49	5.85
5597	NYSE	NAT	Thu, Apr 23, 2020	5.83	5.88	5.22	5.46
5596	NYSE	NAT	Wed, Apr 22, 2020	5.41	5.45	4.95	5.23
5595	NYSE	NAT	Tue, Apr 21, 2020	5.43	5.80	4.91	5.08
5594	NYSE	NAT	Mon, Apr 20, 2020	4.37	4.97	4.10	4.80
5593	NYSE	NAT	Fri, Apr 17, 2020	4.00	4.12	3.95	4.03
5592	NYSE	NAT	Thu, Apr 16, 2020	4.00	4.08	3.81	3.93
5591	NYSE	NAT	Wed, Apr 15, 2020	3.84	4.04	3.74	3.88
5590	NYSE	NAT	Tue, Apr 14, 2020	3.84	3.94	3.76	3.84
5589	NYSE	NAT	Mon, Apr 13, 2020	4.00	4.14	3.62	3.74
5588	NYSE	NAT	Thu, Apr 9, 2020	3.53	3.90	3.27	3.81
5587	NYSE	NAT	Wed, Apr 8, 2020	3.57	3.76	3.46	3.50
5586	NYSE	NAT	Tue, Apr 7, 2020	3.62	3.62	3.33	3.46
5585	NYSE	NAT	Mon, Apr 6, 2020	3.82	3.83	3.38	3.54
5584	NYSE	NAT	Fri, Apr 3, 2020	3.50	3.82	3.26	3.47
5583	NYSE	NAT	Thu, Apr 2, 2020	4.38	4.42	3.18	3.75
5582	NYSE	NAT	Wed, Apr 1, 2020	4.55	4.89	4.30	4.38
5581	NYSE	NAT	Tue, Mar 31, 2020	4.59	4.61	4.33	4.53
5580	NYSE	NAT	Mon, Mar 30, 2020	4.44	5.00	4.43	4.75
5579	NYSE	NAT	Fri, Mar 27, 2020	3.50	4.24	3.33	4.04
5578	NYSE	NAT	Thu, Mar 26, 2020	3.45	3.69	3.21	3.52
5577	NYSE	NAT	Wed, Mar 25, 2020	3.30	3.64	3.15	3.20
5576	NYSE	NAT	Tue, Mar 24, 2020	2.81	3.24	2.80	3.21
5575	NYSE	NAT	Mon, Mar 23, 2020	2.40	2.67	2.30	2.54
5574	NYSE	NAT	Fri, Mar 20, 2020	2.75	2.80	2.41	2.46
5573	NYSE	NAT	Thu, Mar 19, 2020	2.60	2.76	2.35	2.70
5572	NYSE	NAT	Wed, Mar 18, 2020	2.70	2.79	2.33	2.60
5571	NYSE	NAT	Tue, Mar 17, 2020	2.85	2.87	2.55	2.60
5570	NYSE	NAT	Mon, Mar 16, 2020	2.95	3.08	2.50	2.50
5569	NYSE	NAT	Fri, Mar 13, 2020	3.12	3.21	2.85	3.18
5568	NYSE	NAT	Thu, Mar 12, 2020	2.90	3.13	2.60	2.75
5567	NYSE	NAT	Wed, Mar 11, 2020	3.46	3.67	3.11	3.16
5566	NYSE	NAT	Tue, Mar 10, 2020	2.87	3.50	2.83	3.43
5565	NYSE	NAT	Mon, Mar 9, 2020	2.80	3.04	2.63	2.65
5564	NYSE	NAT	Fri, Mar 6, 2020	2.53	2.75	2.53	2.73
5563	NYSE	NAT	Thu, Mar 5, 2020	2.88	2.94	2.63	2.66
5562	NYSE	NAT	Wed, Mar 4, 2020	3.07	3.11	2.96	3.00
5561	NYSE	NAT	Tue, Mar 3, 2020	3.15	3.25	2.93	3.01
5560	NYSE	NAT	Mon, Mar 2, 2020	3.24	3.26	3.00	3.18
5559	NYSE	NAT	Fri, Feb 28, 2020	2.88	3.24	2.88	3.22
5558	NYSE	NAT	Thu, Feb 27, 2020	2.70	3.05	2.69	2.91
5557	NYSE	NAT	Wed, Feb 26, 2020	2.86	2.99	2.78	2.90
5556	NYSE	NAT	Tue, Feb 25, 2020	3.01	3.02	2.82	2.84
5555	NYSE	NAT	Mon, Feb 24, 2020	3.06	3.08	2.96	2.99
5554	NYSE	NAT	Fri, Feb 21, 2020	3.32	3.35	3.15	3.27
5553	NYSE	NAT	Thu, Feb 20, 2020	3.32	3.42	3.28	3.36
5552	NYSE	NAT	Wed, Feb 19, 2020	3.31	3.35	3.25	3.33
5551	NYSE	NAT	Tue, Feb 18, 2020	3.45	3.53	3.25	3.27
5550	NYSE	NAT	Fri, Feb 14, 2020	3.54	3.58	3.41	3.45
5549	NYSE	NAT	Thu, Feb 13, 2020	3.52	3.61	3.48	3.52
5548	NYSE	NAT	Wed, Feb 12, 2020	3.55	3.72	3.51	3.56
5547	NYSE	NAT	Tue, Feb 11, 2020	3.46	3.64	3.46	3.51
5546	NYSE	NAT	Mon, Feb 10, 2020	3.27	3.39	3.23	3.33
5545	NYSE	NAT	Fri, Feb 7, 2020	3.27	3.36	3.25	3.27
5544	NYSE	NAT	Thu, Feb 6, 2020	3.45	3.48	3.29	3.31
5543	NYSE	NAT	Wed, Feb 5, 2020	3.41	3.47	3.38	3.44
5542	NYSE	NAT	Tue, Feb 4, 2020	3.28	3.51	3.28	3.36
5541	NYSE	NAT	Mon, Feb 3, 2020	3.39	3.44	3.25	3.27
5540	NYSE	NAT	Fri, Jan 31, 2020	3.58	3.63	3.35	3.38
5539	NYSE	NAT	Thu, Jan 30, 2020	3.74	3.75	3.49	3.60
5538	NYSE	NAT	Wed, Jan 29, 2020	3.92	3.94	3.76	3.78
5537	NYSE	NAT	Tue, Jan 28, 2020	3.95	4.04	3.89	3.90
5536	NYSE	NAT	Mon, Jan 27, 2020	3.90	4.01	3.71	3.91
5535	NYSE	NAT	Fri, Jan 24, 2020	4.34	4.34	4.02	4.09
5534	NYSE	NAT	Thu, Jan 23, 2020	4.31	4.42	4.16	4.35
5533	NYSE	NAT	Wed, Jan 22, 2020	4.44	4.46	4.32	4.40
5532	NYSE	NAT	Tue, Jan 21, 2020	4.55	4.56	4.40	4.42
5531	NYSE	NAT	Fri, Jan 17, 2020	4.55	4.75	4.52	4.63
5530	NYSE	NAT	Thu, Jan 16, 2020	4.48	4.58	4.36	4.49
5529	NYSE	NAT	Wed, Jan 15, 2020	4.47	4.47	4.11	4.43
5528	NYSE	NAT	Tue, Jan 14, 2020	4.56	4.65	4.42	4.51
5527	NYSE	NAT	Mon, Jan 13, 2020	4.65	4.67	4.43	4.50
5526	NYSE	NAT	Fri, Jan 10, 2020	4.92	4.92	4.60	4.65
5525	NYSE	NAT	Thu, Jan 9, 2020	4.89	5.02	4.78	4.98
5524	NYSE	NAT	Wed, Jan 8, 2020	5.17	5.28	4.74	4.86
5523	NYSE	NAT	Tue, Jan 7, 2020	5.02	5.15	4.96	5.14
5522	NYSE	NAT	Mon, Jan 6, 2020	5.10	5.15	4.94	5.03
5521	NYSE	NAT	Fri, Jan 3, 2020	4.87	5.15	4.86	5.05
5520	NYSE	NAT	Thu, Jan 2, 2020	4.95	4.98	4.81	4.84
5519	NYSE	NAT	Tue, Dec 31, 2019	4.82	4.97	4.78	4.92
5518	NYSE	NAT	Mon, Dec 30, 2019	4.81	4.98	4.81	4.86
5517	NYSE	NAT	Fri, Dec 27, 2019	5.04	5.08	4.76	4.82
5516	NYSE	NAT	Thu, Dec 26, 2019	4.90	5.17	4.88	5.04
5515	NYSE	NAT	Tue, Dec 24, 2019	4.85	4.92	4.73	4.86
5514	NYSE	NAT	Mon, Dec 23, 2019	4.95	5.08	4.85	4.88
5513	NYSE	NAT	Fri, Dec 20, 2019	4.82	4.96	4.82	4.87
5512	NYSE	NAT	Thu, Dec 19, 2019	4.46	4.89	4.46	4.86
5511	NYSE	NAT	Wed, Dec 18, 2019	4.23	4.49	4.20	4.46
5510	NYSE	NAT	Tue, Dec 17, 2019	4.24	4.32	4.17	4.21
5509	NYSE	NAT	Mon, Dec 16, 2019	4.09	4.25	4.07	4.23
5508	NYSE	NAT	Fri, Dec 13, 2019	4.10	4.14	4.04	4.07
5507	NYSE	NAT	Thu, Dec 12, 2019	4.08	4.18	4.03	4.11
5506	NYSE	NAT	Wed, Dec 11, 2019	4.11	4.14	3.94	4.13
5505	NYSE	NAT	Tue, Dec 10, 2019	4.15	4.33	4.08	4.13
5504	NYSE	NAT	Mon, Dec 9, 2019	4.06	4.19	4.00	4.16
5503	NYSE	NAT	Fri, Dec 6, 2019	3.78	4.00	3.78	4.00
5502	NYSE	NAT	Thu, Dec 5, 2019	3.60	3.77	3.54	3.70
5501	NYSE	NAT	Wed, Dec 4, 2019	3.50	3.55	3.46	3.47
5500	NYSE	NAT	Tue, Dec 3, 2019	3.52	3.52	3.42	3.48
5499	NYSE	NAT	Mon, Dec 2, 2019	3.63	3.64	3.48	3.52
5498	NYSE	NAT	Fri, Nov 29, 2019	3.60	3.70	3.52	3.62
5497	NYSE	NAT	Wed, Nov 27, 2019	3.64	3.65	3.57	3.59
5496	NYSE	NAT	Tue, Nov 26, 2019	3.69	3.72	3.60	3.60
5495	NYSE	NAT	Mon, Nov 25, 2019	3.60	3.88	3.51	3.71
5494	NYSE	NAT	Fri, Nov 22, 2019	3.72	3.79	3.61	3.69
5493	NYSE	NAT	Thu, Nov 21, 2019	3.66	3.79	3.63	3.68
5492	NYSE	NAT	Wed, Nov 20, 2019	3.56	3.83	3.55	3.64
5491	NYSE	NAT	Tue, Nov 19, 2019	3.39	3.62	3.29	3.51
5490	NYSE	NAT	Mon, Nov 18, 2019	3.58	3.59	3.34	3.39
5489	NYSE	NAT	Fri, Nov 15, 2019	3.47	3.64	3.42	3.58
5488	NYSE	NAT	Thu, Nov 14, 2019	3.40	3.58	3.39	3.43
5487	NYSE	NAT	Wed, Nov 13, 2019	3.45	3.52	3.33	3.38
5486	NYSE	NAT	Tue, Nov 12, 2019	3.33	3.53	3.30	3.45
5485	NYSE	NAT	Mon, Nov 11, 2019	3.24	3.40	3.15	3.36
5484	NYSE	NAT	Fri, Nov 8, 2019	3.29	3.37	3.24	3.28
5483	NYSE	NAT	Thu, Nov 7, 2019	3.47	3.47	3.25	3.32
5482	NYSE	NAT	Wed, Nov 6, 2019	3.51	3.53	3.33	3.42
5481	NYSE	NAT	Tue, Nov 5, 2019	3.80	3.83	3.47	3.51
5480	NYSE	NAT	Mon, Nov 4, 2019	3.62	3.71	3.59	3.65
5479	NYSE	NAT	Fri, Nov 1, 2019	3.59	3.64	3.45	3.61
5478	NYSE	NAT	Thu, Oct 31, 2019	3.79	3.79	3.45	3.58
5477	NYSE	NAT	Wed, Oct 30, 2019	3.74	3.83	3.64	3.81
5476	NYSE	NAT	Tue, Oct 29, 2019	3.73	3.81	3.68	3.77
5475	NYSE	NAT	Mon, Oct 28, 2019	3.71	3.93	3.70	3.75
5474	NYSE	NAT	Fri, Oct 25, 2019	3.90	3.93	3.74	3.75
5473	NYSE	NAT	Thu, Oct 24, 2019	4.22	4.28	3.70	3.82
5472	NYSE	NAT	Wed, Oct 23, 2019	4.02	4.32	3.90	4.22
5471	NYSE	NAT	Tue, Oct 22, 2019	3.95	4.05	3.83	3.99
5470	NYSE	NAT	Mon, Oct 21, 2019	4.01	4.04	3.90	3.94
5469	NYSE	NAT	Fri, Oct 18, 2019	3.98	4.10	3.95	4.00
5468	NYSE	NAT	Thu, Oct 17, 2019	4.06	4.11	3.86	3.95
5467	NYSE	NAT	Wed, Oct 16, 2019	3.84	4.07	3.80	4.00
5466	NYSE	NAT	Tue, Oct 15, 2019	4.13	4.28	3.83	3.86
5465	NYSE	NAT	Mon, Oct 14, 2019	4.20	4.47	4.06	4.20
5464	NYSE	NAT	Fri, Oct 11, 2019	4.05	4.28	3.94	4.13
5463	NYSE	NAT	Thu, Oct 10, 2019	3.58	3.98	3.53	3.84
5462	NYSE	NAT	Wed, Oct 9, 2019	3.70	4.05	3.47	3.82
5461	NYSE	NAT	Tue, Oct 8, 2019	3.19	3.73	3.07	3.71
5460	NYSE	NAT	Mon, Oct 7, 2019	2.89	3.17	2.79	3.08
5459	NYSE	NAT	Fri, Oct 4, 2019	2.35	2.79	2.33	2.79
5458	NYSE	NAT	Thu, Oct 3, 2019	2.21	2.34	2.20	2.33
5457	NYSE	NAT	Wed, Oct 2, 2019	2.18	2.23	2.10	2.21
5456	NYSE	NAT	Tue, Oct 1, 2019	2.18	2.29	2.17	2.18
5455	NYSE	NAT	Mon, Sep 30, 2019	2.17	2.20	2.12	2.16
5454	NYSE	NAT	Fri, Sep 27, 2019	2.13	2.30	2.13	2.17
5453	NYSE	NAT	Thu, Sep 26, 2019	2.14	2.21	2.04	2.13
5452	NYSE	NAT	Wed, Sep 25, 2019	1.91	2.12	1.91	2.08
5451	NYSE	NAT	Tue, Sep 24, 2019	2.05	2.05	1.90	1.90
5450	NYSE	NAT	Mon, Sep 23, 2019	2.04	2.20	2.03	2.08
5449	NYSE	NAT	Fri, Sep 20, 2019	2.00	2.07	2.00	2.01
5448	NYSE	NAT	Thu, Sep 19, 2019	2.00	2.07	2.00	2.00
5447	NYSE	NAT	Wed, Sep 18, 2019	2.01	2.03	1.96	2.00
5446	NYSE	NAT	Tue, Sep 17, 2019	2.06	2.06	1.94	2.02
5445	NYSE	NAT	Mon, Sep 16, 2019	2.10	2.17	2.05	2.07
5444	NYSE	NAT	Fri, Sep 13, 2019	1.99	2.07	1.98	2.05
5443	NYSE	NAT	Thu, Sep 12, 2019	1.97	2.10	1.95	2.00
5442	NYSE	NAT	Wed, Sep 11, 2019	1.98	1.99	1.90	1.98
5441	NYSE	NAT	Tue, Sep 10, 2019	1.81	1.98	1.81	1.93
5440	NYSE	NAT	Mon, Sep 9, 2019	1.80	1.84	1.79	1.80
5439	NYSE	NAT	Fri, Sep 6, 2019	1.83	1.83	1.77	1.78
5438	NYSE	NAT	Thu, Sep 5, 2019	1.78	1.90	1.78	1.83
5437	NYSE	NAT	Wed, Sep 4, 2019	1.72	1.80	1.72	1.77
5436	NYSE	NAT	Tue, Sep 3, 2019	1.77	1.78	1.66	1.71
5435	NYSE	NAT	Fri, Aug 30, 2019	1.82	1.84	1.77	1.78
5434	NYSE	NAT	Thu, Aug 29, 2019	1.84	1.85	1.81	1.82
5433	NYSE	NAT	Wed, Aug 28, 2019	1.81	1.87	1.80	1.83
5432	NYSE	NAT	Tue, Aug 27, 2019	1.87	1.87	1.77	1.80
5431	NYSE	NAT	Mon, Aug 26, 2019	1.83	1.88	1.80	1.85
5430	NYSE	NAT	Fri, Aug 23, 2019	1.97	1.97	1.81	1.82
5429	NYSE	NAT	Thu, Aug 22, 2019	2.01	2.03	1.96	1.97
5428	NYSE	NAT	Wed, Aug 21, 2019	1.91	2.01	1.88	1.98
5427	NYSE	NAT	Tue, Aug 20, 2019	1.88	1.90	1.86	1.90
5426	NYSE	NAT	Mon, Aug 19, 2019	1.79	1.93	1.79	1.86
5425	NYSE	NAT	Fri, Aug 16, 2019	1.77	1.80	1.71	1.76
5424	NYSE	NAT	Thu, Aug 15, 2019	1.83	1.84	1.75	1.75
5423	NYSE	NAT	Wed, Aug 14, 2019	1.83	1.85	1.82	1.83
5422	NYSE	NAT	Tue, Aug 13, 2019	1.80	1.89	1.80	1.85
5421	NYSE	NAT	Mon, Aug 12, 2019	1.87	1.87	1.80	1.83
5420	NYSE	NAT	Fri, Aug 9, 2019	1.94	1.97	1.87	1.87
5419	NYSE	NAT	Thu, Aug 8, 2019	1.90	1.92	1.85	1.90
5418	NYSE	NAT	Wed, Aug 7, 2019	1.92	1.94	1.85	1.88
5417	NYSE	NAT	Tue, Aug 6, 2019	1.90	1.94	1.86	1.93
5416	NYSE	NAT	Mon, Aug 5, 2019	1.98	1.98	1.87	1.89
5415	NYSE	NAT	Fri, Aug 2, 2019	2.00	2.02	1.95	1.98
5414	NYSE	NAT	Thu, Aug 1, 2019	2.01	2.06	1.96	2.00
5413	NYSE	NAT	Wed, Jul 31, 2019	2.05	2.10	2.01	2.02
5412	NYSE	NAT	Tue, Jul 30, 2019	2.04	2.10	2.01	2.07
5411	NYSE	NAT	Mon, Jul 29, 2019	2.11	2.14	2.04	2.04
5410	NYSE	NAT	Fri, Jul 26, 2019	2.12	2.16	2.11	2.11
5409	NYSE	NAT	Thu, Jul 25, 2019	2.19	2.19	2.11	2.11
5408	NYSE	NAT	Wed, Jul 24, 2019	2.17	2.21	2.14	2.19
5407	NYSE	NAT	Tue, Jul 23, 2019	2.19	2.20	2.15	2.17
5406	NYSE	NAT	Mon, Jul 22, 2019	2.10	2.19	2.10	2.18
5405	NYSE	NAT	Fri, Jul 19, 2019	2.12	2.15	2.08	2.10
5404	NYSE	NAT	Thu, Jul 18, 2019	2.15	2.17	2.11	2.13
5403	NYSE	NAT	Wed, Jul 17, 2019	2.25	2.25	2.13	2.15
5402	NYSE	NAT	Tue, Jul 16, 2019	2.22	2.31	2.22	2.27
5401	NYSE	NAT	Mon, Jul 15, 2019	2.27	2.27	2.17	2.23
5400	NYSE	NAT	Fri, Jul 12, 2019	2.33	2.34	2.25	2.27
5399	NYSE	NAT	Thu, Jul 11, 2019	2.41	2.43	2.34	2.34
5398	NYSE	NAT	Wed, Jul 10, 2019	2.36	2.43	2.35	2.41
5397	NYSE	NAT	Tue, Jul 9, 2019	2.32	2.35	2.26	2.34
5396	NYSE	NAT	Mon, Jul 8, 2019	2.25	2.37	2.25	2.33
5395	NYSE	NAT	Fri, Jul 5, 2019	2.22	2.28	2.19	2.26
5394	NYSE	NAT	Wed, Jul 3, 2019	2.28	2.28	2.22	2.23
5393	NYSE	NAT	Tue, Jul 2, 2019	2.34	2.34	2.20	2.27
5392	NYSE	NAT	Mon, Jul 1, 2019	2.35	2.42	2.30	2.34
5391	NYSE	NAT	Fri, Jun 28, 2019	2.23	2.35	2.23	2.34
5390	NYSE	NAT	Thu, Jun 27, 2019	2.20	2.25	2.19	2.24
5389	NYSE	NAT	Wed, Jun 26, 2019	2.16	2.21	2.13	2.21
5388	NYSE	NAT	Tue, Jun 25, 2019	2.13	2.19	2.12	2.16
5387	NYSE	NAT	Mon, Jun 24, 2019	2.15	2.18	2.12	2.15
5386	NYSE	NAT	Fri, Jun 21, 2019	2.14	2.20	2.13	2.16
5385	NYSE	NAT	Thu, Jun 20, 2019	2.21	2.22	2.13	2.15
5384	NYSE	NAT	Wed, Jun 19, 2019	2.14	2.20	2.14	2.19
5383	NYSE	NAT	Tue, Jun 18, 2019	2.15	2.20	2.12	2.16
5382	NYSE	NAT	Mon, Jun 17, 2019	2.18	2.19	2.12	2.13
5381	NYSE	NAT	Fri, Jun 14, 2019	2.30	2.34	2.19	2.19
5380	NYSE	NAT	Thu, Jun 13, 2019	2.12	2.30	2.09	2.29
5379	NYSE	NAT	Wed, Jun 12, 2019	2.04	2.07	2.01	2.04
5378	NYSE	NAT	Tue, Jun 11, 2019	2.06	2.06	2.01	2.03
5377	NYSE	NAT	Mon, Jun 10, 2019	2.11	2.11	2.02	2.04
5376	NYSE	NAT	Fri, Jun 7, 2019	2.04	2.11	2.03	2.09
5375	NYSE	NAT	Thu, Jun 6, 2019	2.03	2.08	2.00	2.03
5374	NYSE	NAT	Wed, Jun 5, 2019	2.08	2.10	2.00	2.03
5373	NYSE	NAT	Tue, Jun 4, 2019	2.03	2.14	2.03	2.07
5372	NYSE	NAT	Mon, Jun 3, 2019	2.04	2.08	2.01	2.05
5371	NYSE	NAT	Fri, May 31, 2019	2.09	2.09	2.01	2.04
5370	NYSE	NAT	Thu, May 30, 2019	2.15	2.18	2.10	2.12
5369	NYSE	NAT	Wed, May 29, 2019	2.19	2.22	2.13	2.14
5368	NYSE	NAT	Tue, May 28, 2019	2.29	2.35	2.20	2.23
5367	NYSE	NAT	Fri, May 24, 2019	2.35	2.40	2.25	2.29
5366	NYSE	NAT	Thu, May 23, 2019	2.41	2.44	2.28	2.35
5365	NYSE	NAT	Wed, May 22, 2019	2.64	2.65	2.46	2.48
5364	NYSE	NAT	Tue, May 21, 2019	2.71	2.75	2.57	2.61
5363	NYSE	NAT	Mon, May 20, 2019	2.59	2.74	2.55	2.69
5362	NYSE	NAT	Fri, May 17, 2019	2.66	2.76	2.58	2.59
5361	NYSE	NAT	Thu, May 16, 2019	2.48	2.70	2.47	2.66
5360	NYSE	NAT	Wed, May 15, 2019	2.20	2.57	2.20	2.40
5359	NYSE	NAT	Tue, May 14, 2019	2.15	2.20	2.13	2.20
5358	NYSE	NAT	Mon, May 13, 2019	2.17	2.18	2.09	2.11
5357	NYSE	NAT	Fri, May 10, 2019	2.17	2.20	2.13	2.18
5356	NYSE	NAT	Thu, May 9, 2019	2.12	2.18	2.09	2.16
5355	NYSE	NAT	Wed, May 8, 2019	2.10	2.18	2.10	2.14
5354	NYSE	NAT	Tue, May 7, 2019	2.16	2.18	2.08	2.11
5353	NYSE	NAT	Mon, May 6, 2019	2.14	2.19	2.12	2.17
5352	NYSE	NAT	Fri, May 3, 2019	2.16	2.23	2.13	2.21
5351	NYSE	NAT	Thu, May 2, 2019	2.07	2.17	2.07	2.16
5350	NYSE	NAT	Wed, May 1, 2019	2.14	2.16	2.07	2.10
5349	NYSE	NAT	Tue, Apr 30, 2019	2.14	2.17	2.10	2.14
5348	NYSE	NAT	Mon, Apr 29, 2019	2.09	2.15	2.06	2.15
5347	NYSE	NAT	Fri, Apr 26, 2019	2.08	2.11	2.02	2.09
5346	NYSE	NAT	Thu, Apr 25, 2019	2.14	2.15	2.06	2.08
5345	NYSE	NAT	Wed, Apr 24, 2019	2.13	2.18	2.13	2.15
5344	NYSE	NAT	Tue, Apr 23, 2019	2.10	2.15	2.05	2.13
5343	NYSE	NAT	Mon, Apr 22, 2019	2.05	2.11	2.01	2.10
5342	NYSE	NAT	Thu, Apr 18, 2019	2.05	2.09	1.99	2.05
5341	NYSE	NAT	Wed, Apr 17, 2019	2.12	2.12	2.04	2.06
5340	NYSE	NAT	Tue, Apr 16, 2019	2.11	2.13	2.07	2.12
5339	NYSE	NAT	Mon, Apr 15, 2019	2.09	2.12	2.06	2.11
5338	NYSE	NAT	Fri, Apr 12, 2019	2.11	2.12	2.05	2.08
5337	NYSE	NAT	Thu, Apr 11, 2019	2.10	2.15	2.04	2.08
5336	NYSE	NAT	Wed, Apr 10, 2019	1.92	2.13	1.92	2.10
5335	NYSE	NAT	Tue, Apr 9, 2019	1.94	1.95	1.87	1.91
5334	NYSE	NAT	Mon, Apr 8, 2019	1.88	1.95	1.87	1.93
5333	NYSE	NAT	Fri, Apr 5, 2019	1.87	1.88	1.83	1.85
5332	NYSE	NAT	Thu, Apr 4, 2019	1.86	1.90	1.84	1.86
5331	NYSE	NAT	Wed, Apr 3, 2019	1.93	1.95	1.84	1.85
5330	NYSE	NAT	Tue, Apr 2, 2019	1.95	1.96	1.85	1.91
5329	NYSE	NAT	Mon, Apr 1, 2019	1.90	1.99	1.90	1.95
5328	NYSE	NAT	Fri, Mar 29, 2019	2.06	2.07	2.00	2.02
5327	NYSE	NAT	Thu, Mar 28, 2019	2.02	2.06	2.00	2.04
5326	NYSE	NAT	Wed, Mar 27, 2019	2.02	2.04	1.97	2.03
5325	NYSE	NAT	Tue, Mar 26, 2019	2.07	2.08	2.00	2.03
5324	NYSE	NAT	Mon, Mar 25, 2019	2.04	2.08	1.99	2.04
5323	NYSE	NAT	Fri, Mar 22, 2019	2.10	2.10	2.02	2.05
5322	NYSE	NAT	Thu, Mar 21, 2019	2.08	2.17	2.08	2.13
5321	NYSE	NAT	Wed, Mar 20, 2019	2.08	2.12	2.04	2.09
5320	NYSE	NAT	Tue, Mar 19, 2019	2.16	2.19	2.08	2.10
5319	NYSE	NAT	Mon, Mar 18, 2019	2.07	2.17	2.06	2.15
5318	NYSE	NAT	Fri, Mar 15, 2019	2.11	2.14	2.04	2.04
5317	NYSE	NAT	Thu, Mar 14, 2019	2.09	2.14	2.08	2.10
5316	NYSE	NAT	Wed, Mar 13, 2019	2.17	2.19	2.08	2.10
5315	NYSE	NAT	Tue, Mar 12, 2019	2.12	2.19	2.11	2.17
5314	NYSE	NAT	Mon, Mar 11, 2019	2.08	2.12	2.06	2.11
5313	NYSE	NAT	Fri, Mar 8, 2019	2.09	2.12	2.04	2.05
5312	NYSE	NAT	Thu, Mar 7, 2019	2.04	2.15	2.01	2.11
5311	NYSE	NAT	Wed, Mar 6, 2019	2.11	2.14	2.03	2.04
5310	NYSE	NAT	Tue, Mar 5, 2019	2.19	2.19	2.08	2.11
5309	NYSE	NAT	Mon, Mar 4, 2019	2.31	2.33	2.16	2.20
5308	NYSE	NAT	Fri, Mar 1, 2019	2.27	2.32	2.25	2.30
5307	NYSE	NAT	Thu, Feb 28, 2019	2.22	2.28	2.18	2.27
5306	NYSE	NAT	Wed, Feb 27, 2019	2.26	2.29	2.20	2.22
5305	NYSE	NAT	Tue, Feb 26, 2019	2.24	2.30	2.22	2.25
5304	NYSE	NAT	Mon, Feb 25, 2019	2.38	2.38	2.24	2.24
5303	NYSE	NAT	Fri, Feb 22, 2019	2.28	2.38	2.25	2.38
5302	NYSE	NAT	Thu, Feb 21, 2019	2.28	2.31	2.25	2.28
5301	NYSE	NAT	Wed, Feb 20, 2019	2.10	2.31	2.08	2.28
5300	NYSE	NAT	Tue, Feb 19, 2019	2.27	2.34	2.22	2.23
5299	NYSE	NAT	Fri, Feb 15, 2019	2.22	2.29	2.21	2.27
5298	NYSE	NAT	Thu, Feb 14, 2019	2.11	2.21	2.11	2.20
5297	NYSE	NAT	Wed, Feb 13, 2019	2.09	2.20	2.04	2.13
5296	NYSE	NAT	Tue, Feb 12, 2019	2.05	2.17	2.01	2.10
5295	NYSE	NAT	Mon, Feb 11, 2019	1.84	2.00	1.82	1.99
5294	NYSE	NAT	Fri, Feb 8, 2019	1.85	1.88	1.81	1.82
5293	NYSE	NAT	Thu, Feb 7, 2019	1.94	1.94	1.83	1.85
5292	NYSE	NAT	Wed, Feb 6, 2019	1.98	2.00	1.89	1.93
5291	NYSE	NAT	Tue, Feb 5, 2019	2.02	2.06	1.93	1.98
5290	NYSE	NAT	Mon, Feb 4, 2019	2.04	2.06	2.01	2.02
5289	NYSE	NAT	Fri, Feb 1, 2019	2.06	2.08	2.01	2.01
5288	NYSE	NAT	Thu, Jan 31, 2019	2.07	2.13	2.05	2.05
5287	NYSE	NAT	Wed, Jan 30, 2019	2.04	2.08	2.01	2.05
5286	NYSE	NAT	Tue, Jan 29, 2019	2.07	2.08	2.01	2.03
5285	NYSE	NAT	Mon, Jan 28, 2019	2.09	2.11	2.04	2.07
5284	NYSE	NAT	Fri, Jan 25, 2019	2.07	2.14	2.07	2.09
5283	NYSE	NAT	Thu, Jan 24, 2019	2.08	2.10	2.05	2.07
5282	NYSE	NAT	Wed, Jan 23, 2019	2.12	2.15	2.05	2.08
5281	NYSE	NAT	Tue, Jan 22, 2019	2.13	2.18	2.09	2.10
5280	NYSE	NAT	Fri, Jan 18, 2019	2.06	2.18	2.05	2.16
5279	NYSE	NAT	Thu, Jan 17, 2019	2.08	2.15	2.04	2.05
5278	NYSE	NAT	Wed, Jan 16, 2019	2.10	2.18	2.05	2.09
5277	NYSE	NAT	Tue, Jan 15, 2019	2.05	2.11	2.02	2.08
5276	NYSE	NAT	Mon, Jan 14, 2019	2.07	2.11	2.01	2.01
5275	NYSE	NAT	Fri, Jan 11, 2019	2.10	2.12	2.05	2.09
5274	NYSE	NAT	Thu, Jan 10, 2019	2.11	2.13	2.02	2.10
5273	NYSE	NAT	Wed, Jan 9, 2019	2.25	2.27	2.13	2.16
5272	NYSE	NAT	Tue, Jan 8, 2019	2.30	2.30	2.18	2.19
5271	NYSE	NAT	Mon, Jan 7, 2019	2.22	2.34	2.20	2.26
5270	NYSE	NAT	Fri, Jan 4, 2019	2.09	2.24	2.09	2.22
5269	NYSE	NAT	Thu, Jan 3, 2019	2.08	2.13	2.02	2.05
5268	NYSE	NAT	Wed, Jan 2, 2019	1.98	2.14	1.98	2.11
5267	NYSE	NAT	Mon, Dec 31, 2018	1.98	2.08	1.97	2.00
5266	NYSE	NAT	Fri, Dec 28, 2018	2.05	2.07	1.97	1.99
5265	NYSE	NAT	Thu, Dec 27, 2018	2.05	2.09	1.96	2.04
5264	NYSE	NAT	Wed, Dec 26, 2018	2.04	2.10	1.96	2.09
5263	NYSE	NAT	Mon, Dec 24, 2018	2.03	2.14	2.02	2.03
5262	NYSE	NAT	Fri, Dec 21, 2018	2.09	2.16	2.03	2.03
5261	NYSE	NAT	Thu, Dec 20, 2018	2.16	2.23	1.99	2.02
5260	NYSE	NAT	Wed, Dec 19, 2018	2.20	2.33	2.16	2.19
5259	NYSE	NAT	Tue, Dec 18, 2018	2.28	2.30	2.13	2.18
5258	NYSE	NAT	Mon, Dec 17, 2018	2.48	2.54	2.26	2.30
5257	NYSE	NAT	Fri, Dec 14, 2018	2.49	2.61	2.49	2.51
5256	NYSE	NAT	Thu, Dec 13, 2018	2.66	2.68	2.50	2.51
5255	NYSE	NAT	Wed, Dec 12, 2018	2.74	2.82	2.64	2.67
5254	NYSE	NAT	Tue, Dec 11, 2018	2.79	2.84	2.68	2.74
5253	NYSE	NAT	Mon, Dec 10, 2018	2.73	2.79	2.61	2.75
5252	NYSE	NAT	Fri, Dec 7, 2018	2.82	2.82	2.71	2.77
5251	NYSE	NAT	Thu, Dec 6, 2018	2.81	2.85	2.61	2.77
5250	NYSE	NAT	Tue, Dec 4, 2018	3.02	3.05	2.83	2.86
5249	NYSE	NAT	Mon, Dec 3, 2018	3.00	3.08	2.95	3.02
5248	NYSE	NAT	Fri, Nov 30, 2018	3.14	3.15	2.91	2.95
5247	NYSE	NAT	Thu, Nov 29, 2018	3.26	3.34	3.15	3.20
5246	NYSE	NAT	Wed, Nov 28, 2018	3.05	3.37	3.03	3.26
5245	NYSE	NAT	Tue, Nov 27, 2018	2.80	3.13	2.80	3.07
5244	NYSE	NAT	Mon, Nov 26, 2018	2.90	2.94	2.71	2.82
5243	NYSE	NAT	Fri, Nov 23, 2018	2.91	3.00	2.90	2.92
5242	NYSE	NAT	Wed, Nov 21, 2018	2.89	3.04	2.89	2.96
5241	NYSE	NAT	Tue, Nov 20, 2018	2.95	3.05	2.86	2.88
5240	NYSE	NAT	Mon, Nov 19, 2018	2.85	3.06	2.85	3.04
5239	NYSE	NAT	Fri, Nov 16, 2018	2.90	2.94	2.79	2.88
5238	NYSE	NAT	Thu, Nov 15, 2018	2.85	2.98	2.82	2.91
5237	NYSE	NAT	Wed, Nov 14, 2018	3.00	3.00	2.85	2.90
5236	NYSE	NAT	Tue, Nov 13, 2018	2.98	3.12	2.84	2.86
5235	NYSE	NAT	Mon, Nov 12, 2018	3.22	3.25	2.91	2.96
5234	NYSE	NAT	Fri, Nov 9, 2018	3.30	3.41	3.20	3.38
5233	NYSE	NAT	Thu, Nov 8, 2018	3.46	3.47	3.21	3.26
5232	NYSE	NAT	Wed, Nov 7, 2018	3.35	3.41	3.24	3.40
5231	NYSE	NAT	Tue, Nov 6, 2018	3.10	3.31	3.07	3.31
5230	NYSE	NAT	Mon, Nov 5, 2018	3.03	3.17	2.96	3.09
5229	NYSE	NAT	Fri, Nov 2, 2018	2.88	3.09	2.83	3.00
5228	NYSE	NAT	Thu, Nov 1, 2018	2.61	2.89	2.60	2.86
5227	NYSE	NAT	Wed, Oct 31, 2018	2.80	2.81	2.57	2.59
5226	NYSE	NAT	Tue, Oct 30, 2018	2.65	2.82	2.65	2.76
5225	NYSE	NAT	Mon, Oct 29, 2018	2.48	2.78	2.46	2.68
5224	NYSE	NAT	Fri, Oct 26, 2018	2.35	2.46	2.30	2.44
5223	NYSE	NAT	Thu, Oct 25, 2018	2.33	2.39	2.32	2.34
5222	NYSE	NAT	Wed, Oct 24, 2018	2.37	2.38	2.29	2.30
5221	NYSE	NAT	Tue, Oct 23, 2018	2.26	2.38	2.22	2.34
5220	NYSE	NAT	Mon, Oct 22, 2018	2.37	2.41	2.23	2.36
5219	NYSE	NAT	Fri, Oct 19, 2018	2.34	2.40	2.34	2.37
5218	NYSE	NAT	Thu, Oct 18, 2018	2.31	2.41	2.31	2.35
5217	NYSE	NAT	Wed, Oct 17, 2018	2.33	2.36	2.26	2.32
5216	NYSE	NAT	Tue, Oct 16, 2018	2.27	2.37	2.26	2.36
5215	NYSE	NAT	Mon, Oct 15, 2018	2.31	2.35	2.24	2.26
5214	NYSE	NAT	Fri, Oct 12, 2018	2.39	2.42	2.28	2.31
5213	NYSE	NAT	Thu, Oct 11, 2018	2.25	2.36	2.17	2.31
5212	NYSE	NAT	Wed, Oct 10, 2018	2.43	2.47	2.19	2.21
5211	NYSE	NAT	Tue, Oct 9, 2018	2.43	2.50	2.40	2.43
5210	NYSE	NAT	Mon, Oct 8, 2018	2.40	2.44	2.35	2.43
5209	NYSE	NAT	Fri, Oct 5, 2018	2.37	2.44	2.34	2.41
5208	NYSE	NAT	Thu, Oct 4, 2018	2.36	2.39	2.25	2.35
5207	NYSE	NAT	Wed, Oct 3, 2018	2.12	2.38	2.10	2.38
5206	NYSE	NAT	Tue, Oct 2, 2018	2.10	2.17	2.10	2.12
5205	NYSE	NAT	Mon, Oct 1, 2018	2.12	2.18	2.07	2.12
5204	NYSE	NAT	Fri, Sep 28, 2018	2.07	2.14	2.07	2.09
5203	NYSE	NAT	Thu, Sep 27, 2018	2.08	2.15	2.07	2.09
5202	NYSE	NAT	Wed, Sep 26, 2018	2.15	2.17	2.05	2.06
5201	NYSE	NAT	Tue, Sep 25, 2018	2.21	2.21	2.14	2.16
5200	NYSE	NAT	Mon, Sep 24, 2018	2.20	2.23	2.15	2.17
5199	NYSE	NAT	Fri, Sep 21, 2018	2.12	2.20	2.12	2.20
5198	NYSE	NAT	Thu, Sep 20, 2018	2.07	2.17	2.07	2.13
5197	NYSE	NAT	Wed, Sep 19, 2018	2.00	2.10	2.00	2.05
5196	NYSE	NAT	Tue, Sep 18, 2018	1.97	2.09	1.95	2.00
5195	NYSE	NAT	Mon, Sep 17, 2018	2.00	2.02	1.95	1.95
5194	NYSE	NAT	Fri, Sep 14, 2018	2.03	2.04	1.98	2.00
5193	NYSE	NAT	Thu, Sep 13, 2018	2.03	2.07	2.01	2.03
5192	NYSE	NAT	Wed, Sep 12, 2018	2.06	2.09	2.02	2.02
5191	NYSE	NAT	Tue, Sep 11, 2018	2.11	2.11	2.05	2.06
5190	NYSE	NAT	Mon, Sep 10, 2018	2.09	2.14	2.08	2.12
5189	NYSE	NAT	Fri, Sep 7, 2018	2.13	2.14	2.06	2.08
5188	NYSE	NAT	Thu, Sep 6, 2018	2.18	2.18	2.12	2.14
5187	NYSE	NAT	Wed, Sep 5, 2018	2.24	2.24	2.12	2.16
5186	NYSE	NAT	Tue, Sep 4, 2018	2.23	2.26	2.23	2.23
5185	NYSE	NAT	Fri, Aug 31, 2018	2.27	2.28	2.22	2.23
5184	NYSE	NAT	Thu, Aug 30, 2018	2.27	2.29	2.24	2.29
5183	NYSE	NAT	Wed, Aug 29, 2018	2.30	2.31	2.26	2.29
5182	NYSE	NAT	Tue, Aug 28, 2018	2.24	2.29	2.23	2.28
5181	NYSE	NAT	Mon, Aug 27, 2018	2.28	2.30	2.23	2.28
5180	NYSE	NAT	Fri, Aug 24, 2018	2.25	2.30	2.23	2.29
5179	NYSE	NAT	Thu, Aug 23, 2018	2.29	2.31	2.25	2.25
5178	NYSE	NAT	Wed, Aug 22, 2018	2.23	2.32	2.23	2.29
5177	NYSE	NAT	Tue, Aug 21, 2018	2.09	2.25	2.09	2.24
5176	NYSE	NAT	Mon, Aug 20, 2018	2.08	2.13	2.07	2.09
5175	NYSE	NAT	Fri, Aug 17, 2018	2.05	2.10	2.02	2.07
5174	NYSE	NAT	Thu, Aug 16, 2018	2.06	2.11	2.02	2.04
5173	NYSE	NAT	Wed, Aug 15, 2018	2.11	2.15	2.04	2.06
5172	NYSE	NAT	Tue, Aug 14, 2018	2.30	2.33	2.15	2.15
5171	NYSE	NAT	Mon, Aug 13, 2018	2.33	2.37	2.29	2.30
5170	NYSE	NAT	Fri, Aug 10, 2018	2.53	2.53	2.35	2.36
5169	NYSE	NAT	Thu, Aug 9, 2018	2.48	2.54	2.46	2.53
5168	NYSE	NAT	Wed, Aug 8, 2018	2.39	2.47	2.38	2.45
5167	NYSE	NAT	Tue, Aug 7, 2018	2.39	2.40	2.35	2.39
5166	NYSE	NAT	Mon, Aug 6, 2018	2.35	2.42	2.32	2.36
5165	NYSE	NAT	Fri, Aug 3, 2018	2.27	2.34	2.27	2.34
5164	NYSE	NAT	Thu, Aug 2, 2018	2.24	2.33	2.23	2.31
5163	NYSE	NAT	Wed, Aug 1, 2018	2.25	2.30	2.22	2.25
5162	NYSE	NAT	Tue, Jul 31, 2018	2.32	2.35	2.25	2.25
5161	NYSE	NAT	Mon, Jul 30, 2018	2.34	2.41	2.32	2.32
5160	NYSE	NAT	Fri, Jul 27, 2018	2.48	2.52	2.33	2.36
5159	NYSE	NAT	Thu, Jul 26, 2018	2.40	2.50	2.39	2.49
5158	NYSE	NAT	Wed, Jul 25, 2018	2.28	2.40	2.26	2.39
5157	NYSE	NAT	Tue, Jul 24, 2018	2.34	2.36	2.27	2.28
5156	NYSE	NAT	Mon, Jul 23, 2018	2.38	2.43	2.32	2.34
5155	NYSE	NAT	Fri, Jul 20, 2018	2.41	2.45	2.36	2.39
5154	NYSE	NAT	Thu, Jul 19, 2018	2.38	2.49	2.36	2.41
5153	NYSE	NAT	Wed, Jul 18, 2018	2.37	2.44	2.32	2.37
5152	NYSE	NAT	Tue, Jul 17, 2018	2.43	2.46	2.36	2.38
5151	NYSE	NAT	Mon, Jul 16, 2018	2.46	2.49	2.31	2.43
5150	NYSE	NAT	Fri, Jul 13, 2018	2.53	2.56	2.46	2.49
5149	NYSE	NAT	Thu, Jul 12, 2018	2.66	2.67	2.50	2.52
5148	NYSE	NAT	Wed, Jul 11, 2018	2.67	2.72	2.65	2.66
5147	NYSE	NAT	Tue, Jul 10, 2018	2.75	2.75	2.66	2.73
5146	NYSE	NAT	Mon, Jul 9, 2018	2.90	2.90	2.75	2.75
5145	NYSE	NAT	Fri, Jul 6, 2018	2.94	2.98	2.86	2.87
5144	NYSE	NAT	Thu, Jul 5, 2018	2.85	2.97	2.85	2.96
5143	NYSE	NAT	Tue, Jul 3, 2018	2.87	2.99	2.82	2.83
5142	NYSE	NAT	Mon, Jul 2, 2018	2.65	2.84	2.64	2.82
5141	NYSE	NAT	Fri, Jun 29, 2018	2.63	2.68	2.61	2.68
5140	NYSE	NAT	Thu, Jun 28, 2018	2.62	2.67	2.59	2.62
5139	NYSE	NAT	Wed, Jun 27, 2018	2.71	2.76	2.57	2.62
5138	NYSE	NAT	Tue, Jun 26, 2018	2.73	2.76	2.64	2.70
5137	NYSE	NAT	Mon, Jun 25, 2018	3.00	3.00	2.65	2.73
5136	NYSE	NAT	Fri, Jun 22, 2018	2.81	2.99	2.77	2.99
5135	NYSE	NAT	Thu, Jun 21, 2018	2.69	2.77	2.55	2.73
5134	NYSE	NAT	Wed, Jun 20, 2018	2.65	2.70	2.61	2.67
5133	NYSE	NAT	Tue, Jun 19, 2018	2.57	2.64	2.50	2.60
5132	NYSE	NAT	Mon, Jun 18, 2018	2.22	2.63	2.16	2.62
5131	NYSE	NAT	Fri, Jun 15, 2018	2.31	2.32	2.12	2.16
5130	NYSE	NAT	Thu, Jun 14, 2018	2.32	2.34	2.25	2.33
5129	NYSE	NAT	Wed, Jun 13, 2018	2.22	2.33	2.21	2.30
5128	NYSE	NAT	Tue, Jun 12, 2018	2.24	2.25	2.17	2.20
5127	NYSE	NAT	Mon, Jun 11, 2018	2.37	2.40	2.24	2.24
5126	NYSE	NAT	Fri, Jun 8, 2018	2.42	2.48	2.35	2.38
5125	NYSE	NAT	Thu, Jun 7, 2018	2.40	2.47	2.39	2.42
5124	NYSE	NAT	Wed, Jun 6, 2018	2.47	2.60	2.24	2.39
5123	NYSE	NAT	Tue, Jun 5, 2018	2.43	2.47	2.40	2.47
5122	NYSE	NAT	Mon, Jun 4, 2018	2.37	2.44	2.35	2.39
5121	NYSE	NAT	Fri, Jun 1, 2018	2.39	2.44	2.31	2.35
5120	NYSE	NAT	Thu, May 31, 2018	2.35	2.47	2.34	2.37
5119	NYSE	NAT	Wed, May 30, 2018	2.20	2.35	2.16	2.34
5118	NYSE	NAT	Tue, May 29, 2018	2.18	2.25	2.15	2.18
5117	NYSE	NAT	Fri, May 25, 2018	2.12	2.17	2.09	2.17
5116	NYSE	NAT	Thu, May 24, 2018	2.14	2.20	2.11	2.13
5115	NYSE	NAT	Wed, May 23, 2018	2.13	2.18	2.11	2.17
5114	NYSE	NAT	Tue, May 22, 2018	2.16	2.19	2.13	2.18
5113	NYSE	NAT	Mon, May 21, 2018	2.17	2.20	2.13	2.16
5112	NYSE	NAT	Fri, May 18, 2018	2.24	2.30	2.13	2.13
5111	NYSE	NAT	Thu, May 17, 2018	2.05	2.22	2.03	2.21
5110	NYSE	NAT	Wed, May 16, 2018	2.02	2.11	2.00	2.05
5109	NYSE	NAT	Tue, May 15, 2018	2.02	2.03	2.00	2.01
5108	NYSE	NAT	Mon, May 14, 2018	2.04	2.04	2.01	2.03
5107	NYSE	NAT	Fri, May 11, 2018	2.00	2.04	2.00	2.04
5106	NYSE	NAT	Thu, May 10, 2018	2.08	2.08	2.00	2.00
5105	NYSE	NAT	Wed, May 9, 2018	2.09	2.12	2.04	2.09
5104	NYSE	NAT	Tue, May 8, 2018	2.06	2.08	2.00	2.07
5103	NYSE	NAT	Mon, May 7, 2018	2.02	2.10	2.01	2.03
5102	NYSE	NAT	Fri, May 4, 2018	1.92	2.01	1.92	1.99
5101	NYSE	NAT	Thu, May 3, 2018	1.92	1.95	1.87	1.93
5100	NYSE	NAT	Wed, May 2, 2018	1.88	1.95	1.86	1.92
5099	NYSE	NAT	Tue, May 1, 2018	1.90	1.90	1.85	1.88
5098	NYSE	NAT	Mon, Apr 30, 2018	1.90	1.94	1.88	1.88
5097	NYSE	NAT	Fri, Apr 27, 2018	1.98	2.06	1.90	1.90
5096	NYSE	NAT	Thu, Apr 26, 2018	2.07	2.08	2.04	2.07
5095	NYSE	NAT	Wed, Apr 25, 2018	2.09	2.10	2.05	2.08
5094	NYSE	NAT	Tue, Apr 24, 2018	2.13	2.13	2.08	2.09
5093	NYSE	NAT	Mon, Apr 23, 2018	2.11	2.15	2.09	2.12
5092	NYSE	NAT	Fri, Apr 20, 2018	2.15	2.17	2.10	2.11
5091	NYSE	NAT	Thu, Apr 19, 2018	2.16	2.20	2.15	2.17
5090	NYSE	NAT	Wed, Apr 18, 2018	2.19	2.22	2.17	2.17
5089	NYSE	NAT	Tue, Apr 17, 2018	2.15	2.22	2.15	2.17
5088	NYSE	NAT	Mon, Apr 16, 2018	2.18	2.18	2.10	2.15
5087	NYSE	NAT	Fri, Apr 13, 2018	2.10	2.18	2.05	2.18
5086	NYSE	NAT	Thu, Apr 12, 2018	2.05	2.11	2.03	2.10
5085	NYSE	NAT	Wed, Apr 11, 2018	1.94	2.06	1.93	2.05
5084	NYSE	NAT	Tue, Apr 10, 2018	1.88	1.99	1.87	1.96
5083	NYSE	NAT	Mon, Apr 9, 2018	1.87	1.90	1.85	1.87
5082	NYSE	NAT	Fri, Apr 6, 2018	1.87	1.90	1.85	1.87
5081	NYSE	NAT	Thu, Apr 5, 2018	1.88	1.93	1.85	1.88
5080	NYSE	NAT	Wed, Apr 4, 2018	1.88	1.91	1.83	1.87
5079	NYSE	NAT	Tue, Apr 3, 2018	1.89	1.89	1.82	1.89
5078	NYSE	NAT	Mon, Apr 2, 2018	1.94	1.95	1.86	1.87
5077	NYSE	NAT	Thu, Mar 29, 2018	1.89	1.97	1.86	1.94
5076	NYSE	NAT	Wed, Mar 28, 2018	1.94	1.95	1.86	1.88
5075	NYSE	NAT	Tue, Mar 27, 2018	2.07	2.08	1.91	1.93
5074	NYSE	NAT	Mon, Mar 26, 2018	2.08	2.11	2.00	2.07
5073	NYSE	NAT	Fri, Mar 23, 2018	2.03	2.11	2.00	2.05
5072	NYSE	NAT	Thu, Mar 22, 2018	2.11	2.13	2.00	2.03
5071	NYSE	NAT	Wed, Mar 21, 2018	2.22	2.24	2.10	2.14
5070	NYSE	NAT	Tue, Mar 20, 2018	2.29	2.30	2.16	2.23
5069	NYSE	NAT	Mon, Mar 19, 2018	2.26	2.29	2.16	2.28
5068	NYSE	NAT	Fri, Mar 16, 2018	2.25	2.35	2.23	2.28
5067	NYSE	NAT	Thu, Mar 15, 2018	2.20	2.25	2.14	2.24
5066	NYSE	NAT	Wed, Mar 14, 2018	2.26	2.27	2.16	2.18
5065	NYSE	NAT	Tue, Mar 13, 2018	2.28	2.31	2.22	2.26
5064	NYSE	NAT	Mon, Mar 12, 2018	2.24	2.28	2.22	2.26
5063	NYSE	NAT	Fri, Mar 9, 2018	2.28	2.28	2.19	2.23
5062	NYSE	NAT	Thu, Mar 8, 2018	2.21	2.26	2.19	2.26
5061	NYSE	NAT	Wed, Mar 7, 2018	2.25	2.27	2.15	2.18
5060	NYSE	NAT	Tue, Mar 6, 2018	2.32	2.32	2.21	2.24
5059	NYSE	NAT	Mon, Mar 5, 2018	2.17	2.34	2.17	2.28
5058	NYSE	NAT	Fri, Mar 2, 2018	2.03	2.19	2.03	2.18
5057	NYSE	NAT	Thu, Mar 1, 2018	2.07	2.10	2.02	2.06
5056	NYSE	NAT	Wed, Feb 28, 2018	2.24	2.24	2.09	2.09
5055	NYSE	NAT	Tue, Feb 27, 2018	2.40	2.43	2.21	2.22
5054	NYSE	NAT	Mon, Feb 26, 2018	2.29	2.38	2.25	2.38
5053	NYSE	NAT	Fri, Feb 23, 2018	2.20	2.29	2.19	2.27
5052	NYSE	NAT	Thu, Feb 22, 2018	2.18	2.25	2.16	2.19
5051	NYSE	NAT	Wed, Feb 21, 2018	2.17	2.20	2.14	2.16
5050	NYSE	NAT	Tue, Feb 20, 2018	2.15	2.21	2.15	2.17
5049	NYSE	NAT	Fri, Feb 16, 2018	2.20	2.25	2.17	2.18
5048	NYSE	NAT	Thu, Feb 15, 2018	2.18	2.23	2.15	2.20
5047	NYSE	NAT	Wed, Feb 14, 2018	2.13	2.19	2.09	2.15
5046	NYSE	NAT	Tue, Feb 13, 2018	2.15	2.20	2.08	2.14
5045	NYSE	NAT	Mon, Feb 12, 2018	1.97	2.20	1.96	2.19
5044	NYSE	NAT	Fri, Feb 9, 2018	2.00	2.05	1.82	1.97
5043	NYSE	NAT	Thu, Feb 8, 2018	2.06	2.08	1.97	1.98
5042	NYSE	NAT	Wed, Feb 7, 2018	2.17	2.17	2.02	2.05
5041	NYSE	NAT	Tue, Feb 6, 2018	1.99	2.20	1.96	2.17
5040	NYSE	NAT	Mon, Feb 5, 2018	2.12	2.13	1.95	1.99
5039	NYSE	NAT	Fri, Feb 2, 2018	2.20	2.20	2.08	2.10
5038	NYSE	NAT	Thu, Feb 1, 2018	2.31	2.32	2.19	2.22
5037	NYSE	NAT	Wed, Jan 31, 2018	2.33	2.35	2.23	2.31
5036	NYSE	NAT	Tue, Jan 30, 2018	2.40	2.41	2.28	2.33
5035	NYSE	NAT	Mon, Jan 29, 2018	2.50	2.51	2.38	2.42
5034	NYSE	NAT	Fri, Jan 26, 2018	2.52	2.55	2.50	2.50
5033	NYSE	NAT	Thu, Jan 25, 2018	2.53	2.55	2.50	2.52
5032	NYSE	NAT	Wed, Jan 24, 2018	2.60	2.64	2.53	2.53
5031	NYSE	NAT	Tue, Jan 23, 2018	2.61	2.63	2.58	2.61
5030	NYSE	NAT	Mon, Jan 22, 2018	2.61	2.65	2.57	2.64
5029	NYSE	NAT	Fri, Jan 19, 2018	2.61	2.66	2.55	2.63
5028	NYSE	NAT	Thu, Jan 18, 2018	2.65	2.66	2.60	2.61
5027	NYSE	NAT	Wed, Jan 17, 2018	2.65	2.66	2.57	2.63
5026	NYSE	NAT	Tue, Jan 16, 2018	2.68	2.68	2.61	2.63
5025	NYSE	NAT	Fri, Jan 12, 2018	2.64	2.67	2.61	2.63
5024	NYSE	NAT	Thu, Jan 11, 2018	2.65	2.67	2.62	2.64
5023	NYSE	NAT	Wed, Jan 10, 2018	2.55	2.64	2.51	2.63
5022	NYSE	NAT	Tue, Jan 9, 2018	2.58	2.64	2.52	2.52
5021	NYSE	NAT	Mon, Jan 8, 2018	2.65	2.66	2.56	2.57
5020	NYSE	NAT	Fri, Jan 5, 2018	2.59	2.67	2.56	2.58
5019	NYSE	NAT	Thu, Jan 4, 2018	2.65	2.66	2.53	2.56
5018	NYSE	NAT	Wed, Jan 3, 2018	2.60	2.68	2.57	2.62
5017	NYSE	NAT	Tue, Jan 2, 2018	2.50	2.61	2.48	2.57
5016	NYSE	NAT	Fri, Dec 29, 2017	2.52	2.55	2.46	2.46
5015	NYSE	NAT	Thu, Dec 28, 2017	2.52	2.59	2.46	2.56
5014	NYSE	NAT	Wed, Dec 27, 2017	2.50	2.55	2.49	2.50
5013	NYSE	NAT	Tue, Dec 26, 2017	2.56	2.61	2.49	2.50
5012	NYSE	NAT	Fri, Dec 22, 2017	2.55	2.64	2.51	2.57
5011	NYSE	NAT	Thu, Dec 21, 2017	2.49	2.54	2.45	2.54
5010	NYSE	NAT	Wed, Dec 20, 2017	2.55	2.57	2.47	2.48
5009	NYSE	NAT	Tue, Dec 19, 2017	2.63	2.66	2.51	2.55
5008	NYSE	NAT	Mon, Dec 18, 2017	2.72	2.74	2.58	2.59
5007	NYSE	NAT	Fri, Dec 15, 2017	2.71	2.73	2.65	2.71
5006	NYSE	NAT	Thu, Dec 14, 2017	2.65	2.75	2.64	2.67
5005	NYSE	NAT	Wed, Dec 13, 2017	2.75	2.78	2.65	2.65
5004	NYSE	NAT	Tue, Dec 12, 2017	3.67	3.83	3.67	3.67
5003	NYSE	NAT	Mon, Dec 11, 2017	3.63	3.83	3.63	3.66
5002	NYSE	NAT	Fri, Dec 8, 2017	3.59	3.77	3.58	3.67
5001	NYSE	NAT	Thu, Dec 7, 2017	3.70	3.75	3.53	3.57
5000	NYSE	NAT	Wed, Dec 6, 2017	3.82	3.87	3.70	3.57
4999	NYSE	NAT	Tue, Dec 5, 2017	3.95	3.95	3.82	3.85
4998	NYSE	NAT	Mon, Dec 4, 2017	3.94	4.06	3.89	3.89
4997	NYSE	NAT	Fri, Dec 1, 2017	3.98	4.07	3.93	3.99
4996	NYSE	NAT	Thu, Nov 30, 2017	4.03	4.13	3.98	3.99
4995	NYSE	NAT	Wed, Nov 29, 2017	4.00	4.08	4.00	4.03
4994	NYSE	NAT	Tue, Nov 28, 2017	4.18	4.18	4.03	4.05
4993	NYSE	NAT	Mon, Nov 27, 2017	4.10	4.24	4.07	4.19
4992	NYSE	NAT	Fri, Nov 24, 2017	4.04	4.11	4.01	4.10
4991	NYSE	NAT	Wed, Nov 22, 2017	4.03	4.12	4.03	4.03
4990	NYSE	NAT	Tue, Nov 21, 2017	4.12	4.17	4.02	4.06
4989	NYSE	NAT	Mon, Nov 20, 2017	4.11	4.15	4.01	4.12
4988	NYSE	NAT	Fri, Nov 17, 2017	4.07	4.19	4.04	4.15
4987	NYSE	NAT	Thu, Nov 16, 2017	4.13	4.16	4.00	4.09
4986	NYSE	NAT	Wed, Nov 15, 2017	4.07	4.23	4.03	4.12
4985	NYSE	NAT	Tue, Nov 14, 2017	4.20	4.24	4.10	4.13
4984	NYSE	NAT	Mon, Nov 13, 2017	4.22	4.38	4.16	4.23
4983	NYSE	NAT	Fri, Nov 10, 2017	4.20	4.36	4.20	4.23
4982	NYSE	NAT	Thu, Nov 9, 2017	4.20	4.53	4.20	4.25
4981	NYSE	NAT	Wed, Nov 8, 2017	4.20	4.35	4.15	4.26
4980	NYSE	NAT	Tue, Nov 7, 2017	4.15	4.26	4.10	4.17
4979	NYSE	NAT	Mon, Nov 6, 2017	4.21	4.30	4.09	4.14
4978	NYSE	NAT	Fri, Nov 3, 2017	4.35	4.37	4.19	4.21
4977	NYSE	NAT	Thu, Nov 2, 2017	4.40	4.45	4.32	4.36
4976	NYSE	NAT	Wed, Nov 1, 2017	4.47	4.53	4.23	4.37
4975	NYSE	NAT	Tue, Oct 31, 2017	4.63	4.64	4.42	4.44
4974	NYSE	NAT	Mon, Oct 30, 2017	4.53	4.70	4.50	4.62
4973	NYSE	NAT	Fri, Oct 27, 2017	4.49	4.62	4.46	4.60
4972	NYSE	NAT	Thu, Oct 26, 2017	4.51	4.56	4.35	4.48
4971	NYSE	NAT	Wed, Oct 25, 2017	4.58	4.61	4.42	4.52
4970	NYSE	NAT	Tue, Oct 24, 2017	4.59	4.85	4.57	4.57
4969	NYSE	NAT	Mon, Oct 23, 2017	5.00	5.03	4.52	4.64
4968	NYSE	NAT	Fri, Oct 20, 2017	5.15	5.16	4.95	4.98
4967	NYSE	NAT	Thu, Oct 19, 2017	5.51	5.61	5.00	5.17
4966	NYSE	NAT	Wed, Oct 18, 2017	5.43	5.67	5.43	5.63
4965	NYSE	NAT	Tue, Oct 17, 2017	5.44	5.60	5.43	5.46
4964	NYSE	NAT	Mon, Oct 16, 2017	5.31	5.57	5.31	5.40
4963	NYSE	NAT	Fri, Oct 13, 2017	5.29	5.43	5.26	5.32
4962	NYSE	NAT	Thu, Oct 12, 2017	5.27	5.38	5.26	5.27
4961	NYSE	NAT	Wed, Oct 11, 2017	5.26	5.38	5.26	5.31
4960	NYSE	NAT	Tue, Oct 10, 2017	5.25	5.45	5.25	5.27
4959	NYSE	NAT	Mon, Oct 9, 2017	5.26	5.31	5.20	5.24
4958	NYSE	NAT	Fri, Oct 6, 2017	5.37	5.43	5.21	5.26
4957	NYSE	NAT	Thu, Oct 5, 2017	5.45	5.55	5.42	5.44
4956	NYSE	NAT	Wed, Oct 4, 2017	5.60	5.70	5.45	5.45
4955	NYSE	NAT	Tue, Oct 3, 2017	5.74	5.84	5.65	5.66
4954	NYSE	NAT	Mon, Oct 2, 2017	5.30	5.77	5.30	5.76
4953	NYSE	NAT	Fri, Sep 29, 2017	5.31	5.44	5.31	5.34
4952	NYSE	NAT	Thu, Sep 28, 2017	5.43	5.45	5.31	5.33
4951	NYSE	NAT	Wed, Sep 27, 2017	5.28	5.52	5.25	5.42
4950	NYSE	NAT	Tue, Sep 26, 2017	5.27	5.35	5.15	5.28
4949	NYSE	NAT	Mon, Sep 25, 2017	5.21	5.38	5.20	5.32
4948	NYSE	NAT	Fri, Sep 22, 2017	5.32	5.36	5.16	5.21
4947	NYSE	NAT	Thu, Sep 21, 2017	5.32	5.39	5.24	5.32
4946	NYSE	NAT	Wed, Sep 20, 2017	5.31	5.46	5.22	5.37
4945	NYSE	NAT	Tue, Sep 19, 2017	5.31	5.40	5.25	5.37
4944	NYSE	NAT	Mon, Sep 18, 2017	5.22	5.36	5.18	5.29
4943	NYSE	NAT	Fri, Sep 15, 2017	5.35	5.39	5.16	5.25
4942	NYSE	NAT	Thu, Sep 14, 2017	5.43	5.53	5.32	5.39
4941	NYSE	NAT	Wed, Sep 13, 2017	5.32	5.47	5.32	5.41
4940	NYSE	NAT	Tue, Sep 12, 2017	5.26	5.48	5.26	5.32
4939	NYSE	NAT	Mon, Sep 11, 2017	5.06	5.43	5.04	5.26
4938	NYSE	NAT	Fri, Sep 8, 2017	5.16	5.25	5.04	5.09
4937	NYSE	NAT	Thu, Sep 7, 2017	5.50	5.62	5.15	5.19
4936	NYSE	NAT	Wed, Sep 6, 2017	5.30	5.55	5.27	5.50
4935	NYSE	NAT	Tue, Sep 5, 2017	5.12	5.26	5.06	5.25
4934	NYSE	NAT	Fri, Sep 1, 2017	4.72	5.10	4.70	5.03
4933	NYSE	NAT	Thu, Aug 31, 2017	4.54	4.74	4.50	4.74
4932	NYSE	NAT	Wed, Aug 30, 2017	4.65	4.70	4.52	4.53
4931	NYSE	NAT	Tue, Aug 29, 2017	4.69	4.73	4.57	4.65
4930	NYSE	NAT	Mon, Aug 28, 2017	4.77	4.82	4.66	4.71
4929	NYSE	NAT	Fri, Aug 25, 2017	4.55	4.82	4.55	4.75
4928	NYSE	NAT	Thu, Aug 24, 2017	4.60	4.63	4.48	4.58
4927	NYSE	NAT	Wed, Aug 23, 2017	4.60	4.66	4.42	4.60
4926	NYSE	NAT	Tue, Aug 22, 2017	4.60	4.71	4.41	4.64
4925	NYSE	NAT	Mon, Aug 21, 2017	5.00	5.00	4.55	4.63
4924	NYSE	NAT	Fri, Aug 18, 2017	5.09	5.09	4.70	4.99
4923	NYSE	NAT	Thu, Aug 17, 2017	5.36	5.43	5.11	5.11
4922	NYSE	NAT	Wed, Aug 16, 2017	5.39	5.45	5.32	5.36
4921	NYSE	NAT	Tue, Aug 15, 2017	5.34	5.43	5.30	5.39
4920	NYSE	NAT	Mon, Aug 14, 2017	5.30	5.49	5.28	5.38
4919	NYSE	NAT	Fri, Aug 11, 2017	5.40	5.50	5.25	5.29
4918	NYSE	NAT	Thu, Aug 10, 2017	5.44	5.48	5.31	5.38
4917	NYSE	NAT	Wed, Aug 9, 2017	5.45	5.61	5.34	5.39
4916	NYSE	NAT	Tue, Aug 8, 2017	5.51	5.61	5.43	5.45
4915	NYSE	NAT	Mon, Aug 7, 2017	5.55	5.82	5.53	5.56
4914	NYSE	NAT	Fri, Aug 4, 2017	5.60	5.69	5.54	5.66
4913	NYSE	NAT	Thu, Aug 3, 2017	5.70	5.80	5.59	5.60
4912	NYSE	NAT	Wed, Aug 2, 2017	5.70	5.83	5.70	5.73
4911	NYSE	NAT	Tue, Aug 1, 2017	5.84	5.90	5.73	5.75
4910	NYSE	NAT	Mon, Jul 31, 2017	6.00	6.01	5.80	5.83
4909	NYSE	NAT	Fri, Jul 28, 2017	5.81	6.00	5.81	5.99
4908	NYSE	NAT	Thu, Jul 27, 2017	5.80	5.92	5.79	5.83
4907	NYSE	NAT	Wed, Jul 26, 2017	5.85	5.88	5.79	5.82
4906	NYSE	NAT	Tue, Jul 25, 2017	5.89	5.95	5.78	5.86
4905	NYSE	NAT	Mon, Jul 24, 2017	5.87	5.92	5.78	5.90
4904	NYSE	NAT	Fri, Jul 21, 2017	5.88	5.97	5.68	5.94
4903	NYSE	NAT	Thu, Jul 20, 2017	6.14	6.20	6.02	6.16
4902	NYSE	NAT	Wed, Jul 19, 2017	6.04	6.21	6.04	6.16
4901	NYSE	NAT	Tue, Jul 18, 2017	6.05	6.09	5.96	6.04
4900	NYSE	NAT	Mon, Jul 17, 2017	6.23	6.34	6.05	6.06
4899	NYSE	NAT	Fri, Jul 14, 2017	6.39	6.55	6.27	6.29
4898	NYSE	NAT	Thu, Jul 13, 2017	6.21	6.47	6.21	6.37
4897	NYSE	NAT	Wed, Jul 12, 2017	6.24	6.40	6.15	6.21
4896	NYSE	NAT	Tue, Jul 11, 2017	6.10	6.28	6.05	6.18
4895	NYSE	NAT	Mon, Jul 10, 2017	5.98	6.24	5.98	6.09
4894	NYSE	NAT	Fri, Jul 7, 2017	6.08	6.13	5.95	5.97
4893	NYSE	NAT	Thu, Jul 6, 2017	6.19	6.26	6.03	6.12
4892	NYSE	NAT	Wed, Jul 5, 2017	6.54	6.54	6.20	6.21
4891	NYSE	NAT	Mon, Jul 3, 2017	6.26	6.64	6.26	6.52
4890	NYSE	NAT	Fri, Jun 30, 2017	6.26	6.47	6.26	6.28
4889	NYSE	NAT	Thu, Jun 29, 2017	6.24	6.34	6.20	6.26
4888	NYSE	NAT	Wed, Jun 28, 2017	6.16	6.30	6.10	6.24
4887	NYSE	NAT	Tue, Jun 27, 2017	6.05	6.24	6.05	6.12
4886	NYSE	NAT	Mon, Jun 26, 2017	6.10	6.16	6.02	6.07
4885	NYSE	NAT	Fri, Jun 23, 2017	5.95	6.16	5.92	6.05
4884	NYSE	NAT	Thu, Jun 22, 2017	5.95	6.10	5.95	5.95
4883	NYSE	NAT	Wed, Jun 21, 2017	5.85	6.17	5.85	5.97
4882	NYSE	NAT	Tue, Jun 20, 2017	5.81	5.90	5.78	5.82
4881	NYSE	NAT	Mon, Jun 19, 2017	6.00	6.04	5.77	5.87
4880	NYSE	NAT	Fri, Jun 16, 2017	5.94	5.99	5.87	5.95
4879	NYSE	NAT	Thu, Jun 15, 2017	5.87	6.00	5.83	5.90
4878	NYSE	NAT	Wed, Jun 14, 2017	5.95	5.98	5.75	5.91
4877	NYSE	NAT	Tue, Jun 13, 2017	6.13	6.26	5.92	5.98
4876	NYSE	NAT	Mon, Jun 12, 2017	6.29	6.42	6.06	6.13
4875	NYSE	NAT	Fri, Jun 9, 2017	5.87	6.34	5.87	6.24
4874	NYSE	NAT	Thu, Jun 8, 2017	5.92	6.04	5.87	5.89
4873	NYSE	NAT	Wed, Jun 7, 2017	5.98	6.09	5.85	5.87
4872	NYSE	NAT	Tue, Jun 6, 2017	6.06	6.08	5.94	6.02
4871	NYSE	NAT	Mon, Jun 5, 2017	6.08	6.12	5.95	6.01
4870	NYSE	NAT	Fri, Jun 2, 2017	6.31	6.36	6.05	6.05
4869	NYSE	NAT	Thu, Jun 1, 2017	5.95	6.43	5.95	6.30
4868	NYSE	NAT	Wed, May 31, 2017	5.60	5.97	5.42	5.91
4867	NYSE	NAT	Tue, May 30, 2017	5.95	6.00	5.57	5.60
4866	NYSE	NAT	Fri, May 26, 2017	6.48	6.49	5.91	5.92
4865	NYSE	NAT	Thu, May 25, 2017	6.50	6.64	6.45	6.49
4864	NYSE	NAT	Wed, May 24, 2017	6.96	6.97	6.45	6.50
4863	NYSE	NAT	Tue, May 23, 2017	7.06	7.13	6.96	6.98
4862	NYSE	NAT	Mon, May 22, 2017	6.96	7.13	6.96	7.02
4861	NYSE	NAT	Fri, May 19, 2017	7.06	7.12	6.95	6.97
4860	NYSE	NAT	Thu, May 18, 2017	7.04	7.08	6.86	6.99
4859	NYSE	NAT	Wed, May 17, 2017	7.11	7.22	7.00	7.02
4858	NYSE	NAT	Tue, May 16, 2017	7.29	7.36	7.08	7.14
4857	NYSE	NAT	Mon, May 15, 2017	7.29	7.37	7.25	7.30
4856	NYSE	NAT	Fri, May 12, 2017	7.08	7.33	7.00	7.21
4855	NYSE	NAT	Thu, May 11, 2017	7.30	7.30	7.06	7.09
4854	NYSE	NAT	Wed, May 10, 2017	7.11	7.41	7.10	7.32
4853	NYSE	NAT	Tue, May 9, 2017	6.72	7.18	6.63	7.11
4852	NYSE	NAT	Mon, May 8, 2017	6.79	6.94	6.45	6.72
4851	NYSE	NAT	Fri, May 5, 2017	7.11	7.19	6.94	7.01
4850	NYSE	NAT	Thu, May 4, 2017	7.51	7.60	6.94	7.09
4849	NYSE	NAT	Wed, May 3, 2017	8.05	8.08	7.44	7.45
4848	NYSE	NAT	Tue, May 2, 2017	8.21	8.25	8.05	8.08
4847	NYSE	NAT	Mon, May 1, 2017	8.23	8.33	8.18	8.19
4846	NYSE	NAT	Fri, Apr 28, 2017	8.27	8.35	8.23	8.23
4845	NYSE	NAT	Thu, Apr 27, 2017	8.23	8.32	8.22	8.29
4844	NYSE	NAT	Wed, Apr 26, 2017	8.21	8.37	8.19	8.30
4843	NYSE	NAT	Tue, Apr 25, 2017	8.34	8.41	8.22	8.25
4842	NYSE	NAT	Mon, Apr 24, 2017	8.36	8.45	8.32	8.37
4841	NYSE	NAT	Fri, Apr 21, 2017	8.28	8.34	8.24	8.29
4840	NYSE	NAT	Thu, Apr 20, 2017	8.23	8.38	8.18	8.31
4839	NYSE	NAT	Wed, Apr 19, 2017	8.19	8.28	8.17	8.19
4838	NYSE	NAT	Tue, Apr 18, 2017	8.09	8.19	8.06	8.18
4837	NYSE	NAT	Mon, Apr 17, 2017	8.07	8.14	8.00	8.14
4836	NYSE	NAT	Thu, Apr 13, 2017	8.43	8.43	8.06	8.07
4835	NYSE	NAT	Wed, Apr 12, 2017	8.45	8.55	8.41	8.44
4834	NYSE	NAT	Tue, Apr 11, 2017	8.55	8.57	8.43	8.47
4833	NYSE	NAT	Mon, Apr 10, 2017	8.02	8.60	7.98	8.55
4832	NYSE	NAT	Fri, Apr 7, 2017	7.98	8.09	7.98	7.98
4831	NYSE	NAT	Thu, Apr 6, 2017	7.94	8.06	7.93	8.01
4830	NYSE	NAT	Wed, Apr 5, 2017	8.10	8.18	7.93	7.93
4829	NYSE	NAT	Tue, Apr 4, 2017	8.12	8.16	8.06	8.09
4828	NYSE	NAT	Mon, Apr 3, 2017	8.09	8.16	8.06	8.10
4827	NYSE	NAT	Fri, Mar 31, 2017	8.07	8.14	8.02	8.11
4826	NYSE	NAT	Thu, Mar 30, 2017	8.11	8.12	7.98	8.08
4825	NYSE	NAT	Wed, Mar 29, 2017	7.89	8.16	7.89	8.09
4824	NYSE	NAT	Tue, Mar 28, 2017	7.83	7.97	7.83	7.92
4823	NYSE	NAT	Mon, Mar 27, 2017	7.80	7.85	7.74	7.84
4822	NYSE	NAT	Fri, Mar 24, 2017	7.95	7.98	7.85	7.86
4821	NYSE	NAT	Thu, Mar 23, 2017	7.98	8.10	7.91	7.93
4820	NYSE	NAT	Wed, Mar 22, 2017	7.96	8.00	7.85	7.90
4819	NYSE	NAT	Tue, Mar 21, 2017	8.23	8.23	7.96	7.97
4818	NYSE	NAT	Mon, Mar 20, 2017	8.06	8.25	8.02	8.20
4817	NYSE	NAT	Fri, Mar 17, 2017	8.03	8.11	7.98	8.07
4816	NYSE	NAT	Thu, Mar 16, 2017	7.86	8.00	7.82	8.00
4815	NYSE	NAT	Wed, Mar 15, 2017	7.68	7.84	7.64	7.84
4814	NYSE	NAT	Tue, Mar 14, 2017	7.71	7.75	7.64	7.65
4813	NYSE	NAT	Mon, Mar 13, 2017	7.76	7.88	7.73	7.74
4812	NYSE	NAT	Fri, Mar 10, 2017	7.83	7.93	7.72	7.77
4811	NYSE	NAT	Thu, Mar 9, 2017	7.69	7.78	7.66	7.77
4810	NYSE	NAT	Wed, Mar 8, 2017	7.70	7.81	7.68	7.70
4809	NYSE	NAT	Tue, Mar 7, 2017	7.83	7.86	7.65	7.69
4808	NYSE	NAT	Mon, Mar 6, 2017	7.94	7.94	7.83	7.85
4807	NYSE	NAT	Fri, Mar 3, 2017	7.86	8.00	7.84	7.91
4806	NYSE	NAT	Thu, Mar 2, 2017	7.86	8.09	7.82	7.86
4805	NYSE	NAT	Wed, Mar 1, 2017	7.93	7.96	7.84	7.88
4804	NYSE	NAT	Tue, Feb 28, 2017	8.00	8.03	7.81	7.87
4803	NYSE	NAT	Mon, Feb 27, 2017	7.93	8.12	7.90	8.01
4802	NYSE	NAT	Fri, Feb 24, 2017	8.18	8.19	7.86	7.90
4801	NYSE	NAT	Thu, Feb 23, 2017	8.19	8.25	8.11	8.17
4800	NYSE	NAT	Wed, Feb 22, 2017	8.21	8.26	8.09	8.19
4799	NYSE	NAT	Tue, Feb 21, 2017	8.28	8.31	8.15	8.22
4798	NYSE	NAT	Fri, Feb 17, 2017	8.23	8.27	8.15	8.27
4797	NYSE	NAT	Thu, Feb 16, 2017	8.30	8.34	8.20	8.22
4796	NYSE	NAT	Wed, Feb 15, 2017	8.33	8.42	8.28	8.35
4795	NYSE	NAT	Tue, Feb 14, 2017	8.33	8.44	8.26	8.39
4794	NYSE	NAT	Mon, Feb 13, 2017	8.43	8.51	8.33	8.39
4793	NYSE	NAT	Fri, Feb 10, 2017	8.29	8.46	8.27	8.38
4792	NYSE	NAT	Thu, Feb 9, 2017	8.57	8.57	8.23	8.29
4791	NYSE	NAT	Wed, Feb 8, 2017	8.33	8.60	8.20	8.60
4790	NYSE	NAT	Tue, Feb 7, 2017	8.66	8.74	8.50	8.32
4789	NYSE	NAT	Mon, Feb 6, 2017	8.38	8.64	8.37	8.60
4788	NYSE	NAT	Fri, Feb 3, 2017	8.18	8.29	8.11	8.28
4787	NYSE	NAT	Thu, Feb 2, 2017	8.33	8.44	8.21	8.24
4786	NYSE	NAT	Wed, Feb 1, 2017	8.60	8.68	8.37	8.42
4785	NYSE	NAT	Tue, Jan 31, 2017	8.68	8.68	8.50	8.56
4784	NYSE	NAT	Mon, Jan 30, 2017	8.70	8.72	8.50	8.64
4783	NYSE	NAT	Fri, Jan 27, 2017	8.67	8.80	8.62	8.70
4782	NYSE	NAT	Thu, Jan 26, 2017	8.64	8.89	8.64	8.70
4781	NYSE	NAT	Wed, Jan 25, 2017	8.61	8.68	8.55	8.61
4780	NYSE	NAT	Tue, Jan 24, 2017	8.60	8.67	8.48	8.62
4779	NYSE	NAT	Mon, Jan 23, 2017	8.85	8.85	8.45	8.49
4778	NYSE	NAT	Fri, Jan 20, 2017	9.01	9.30	8.88	9.28
4777	NYSE	NAT	Thu, Jan 19, 2017	9.12	9.12	8.84	9.00
4776	NYSE	NAT	Wed, Jan 18, 2017	8.72	9.12	8.63	9.12
4775	NYSE	NAT	Tue, Jan 17, 2017	8.65	8.78	8.62	8.73
4774	NYSE	NAT	Fri, Jan 13, 2017	8.62	8.70	8.57	8.65
4773	NYSE	NAT	Thu, Jan 12, 2017	8.64	8.65	8.48	8.58
4772	NYSE	NAT	Wed, Jan 11, 2017	8.43	8.68	8.41	8.64
4771	NYSE	NAT	Tue, Jan 10, 2017	8.41	8.53	8.41	8.43
4770	NYSE	NAT	Mon, Jan 9, 2017	8.60	8.62	8.36	8.42
4769	NYSE	NAT	Fri, Jan 6, 2017	8.64	8.67	8.53	8.60
4768	NYSE	NAT	Thu, Jan 5, 2017	8.67	8.69	8.55	8.63
4767	NYSE	NAT	Wed, Jan 4, 2017	8.52	8.64	8.45	8.64
4766	NYSE	NAT	Tue, Jan 3, 2017	8.42	8.52	8.28	8.48
4765	NYSE	NAT	Fri, Dec 30, 2016	8.38	8.45	8.24	8.33
4764	NYSE	NAT	Thu, Dec 29, 2016	8.35	8.40	8.21	8.39
4763	NYSE	NAT	Wed, Dec 28, 2016	8.55	8.55	8.29	8.35
4762	NYSE	NAT	Tue, Dec 27, 2016	8.45	8.50	8.30	8.46
4761	NYSE	NAT	Fri, Dec 23, 2016	8.34	8.50	8.28	8.50
4760	NYSE	NAT	Thu, Dec 22, 2016	8.49	8.70	8.36	8.38
4759	NYSE	NAT	Wed, Dec 21, 2016	8.53	8.72	8.48	8.50
4758	NYSE	NAT	Tue, Dec 20, 2016	8.64	8.72	8.44	8.49
4757	NYSE	NAT	Mon, Dec 19, 2016	8.90	8.98	8.73	8.73
4756	NYSE	NAT	Fri, Dec 16, 2016	9.05	9.09	8.88	8.91
4755	NYSE	NAT	Thu, Dec 15, 2016	8.84	9.11	8.77	8.99
4754	NYSE	NAT	Wed, Dec 14, 2016	9.09	9.20	8.89	8.89
4753	NYSE	NAT	Tue, Dec 13, 2016	9.08	9.17	8.87	9.14
4752	NYSE	NAT	Mon, Dec 12, 2016	9.51	9.53	8.98	9.06
4751	NYSE	NAT	Fri, Dec 9, 2016	9.61	9.86	9.36	9.42
4750	NYSE	NAT	Thu, Dec 8, 2016	9.07	9.59	9.07	9.59
4749	NYSE	NAT	Wed, Dec 7, 2016	8.74	9.05	8.61	9.05
4748	NYSE	NAT	Tue, Dec 6, 2016	8.58	8.73	8.47	8.72
4747	NYSE	NAT	Mon, Dec 5, 2016	8.57	8.77	8.52	8.58
4746	NYSE	NAT	Fri, Dec 2, 2016	8.57	8.71	8.44	8.54
4745	NYSE	NAT	Thu, Dec 1, 2016	8.57	8.67	8.44	8.62
4744	NYSE	NAT	Wed, Nov 30, 2016	8.77	8.82	8.41	8.50
4743	NYSE	NAT	Tue, Nov 29, 2016	8.68	8.75	8.48	8.54
4742	NYSE	NAT	Mon, Nov 28, 2016	8.97	9.03	8.69	8.71
4741	NYSE	NAT	Fri, Nov 25, 2016	9.08	9.18	8.88	8.98
4740	NYSE	NAT	Wed, Nov 23, 2016	8.93	9.11	8.77	9.03
4739	NYSE	NAT	Tue, Nov 22, 2016	9.28	9.28	8.94	9.05
4738	NYSE	NAT	Mon, Nov 21, 2016	9.04	9.29	8.87	9.22
4737	NYSE	NAT	Fri, Nov 18, 2016	8.97	9.05	8.87	8.98
4736	NYSE	NAT	Thu, Nov 17, 2016	9.32	9.41	8.78	8.97
4735	NYSE	NAT	Wed, Nov 16, 2016	8.84	9.52	8.72	9.07
4734	NYSE	NAT	Tue, Nov 15, 2016	8.97	9.03	8.68	8.70
4733	NYSE	NAT	Mon, Nov 14, 2016	8.82	9.04	8.82	8.88
4732	NYSE	NAT	Fri, Nov 11, 2016	8.97	9.10	8.75	8.86
4731	NYSE	NAT	Thu, Nov 10, 2016	8.58	9.28	8.29	9.12
4730	NYSE	NAT	Wed, Nov 9, 2016	7.55	7.97	7.50	7.92
4729	NYSE	NAT	Tue, Nov 8, 2016	7.71	7.73	7.55	7.62
4728	NYSE	NAT	Mon, Nov 7, 2016	7.80	7.93	7.72	7.75
4727	NYSE	NAT	Fri, Nov 4, 2016	7.83	7.92	7.58	7.59
4726	NYSE	NAT	Thu, Nov 3, 2016	7.88	7.98	7.85	7.85
4725	NYSE	NAT	Wed, Nov 2, 2016	7.99	8.07	7.83	7.87
4724	NYSE	NAT	Tue, Nov 1, 2016	8.20	8.41	7.81	8.08
4723	NYSE	NAT	Mon, Oct 31, 2016	8.38	8.41	8.07	8.10
4722	NYSE	NAT	Fri, Oct 28, 2016	8.54	8.71	8.33	8.38
4721	NYSE	NAT	Thu, Oct 27, 2016	8.77	8.86	8.51	8.54
4720	NYSE	NAT	Wed, Oct 26, 2016	9.02	9.10	8.73	8.73
4719	NYSE	NAT	Tue, Oct 25, 2016	9.24	9.33	9.03	9.03
4718	NYSE	NAT	Mon, Oct 24, 2016	9.66	9.74	9.42	9.21
4717	NYSE	NAT	Fri, Oct 21, 2016	9.66	9.79	9.60	9.66
4716	NYSE	NAT	Thu, Oct 20, 2016	9.61	9.73	9.41	9.68
4715	NYSE	NAT	Wed, Oct 19, 2016	9.79	9.87	9.58	9.69
4714	NYSE	NAT	Tue, Oct 18, 2016	9.66	9.77	9.47	9.72
4713	NYSE	NAT	Mon, Oct 17, 2016	9.22	9.61	9.13	9.54
4712	NYSE	NAT	Fri, Oct 14, 2016	9.06	9.14	8.90	8.91
4711	NYSE	NAT	Thu, Oct 13, 2016	9.17	9.17	8.86	9.02
4710	NYSE	NAT	Wed, Oct 12, 2016	9.42	9.52	9.14	9.17
4709	NYSE	NAT	Tue, Oct 11, 2016	9.81	9.81	9.34	9.45
4708	NYSE	NAT	Mon, Oct 10, 2016	9.92	10.01	9.71	9.82
4707	NYSE	NAT	Fri, Oct 7, 2016	9.99	10.01	9.82	9.84
4706	NYSE	NAT	Thu, Oct 6, 2016	9.95	10.02	9.87	9.93
4705	NYSE	NAT	Wed, Oct 5, 2016	9.93	9.99	9.88	9.91
4704	NYSE	NAT	Tue, Oct 4, 2016	9.96	10.01	9.83	9.89
4703	NYSE	NAT	Mon, Oct 3, 2016	9.97	10.06	9.81	9.93
4702	NYSE	NAT	Fri, Sep 30, 2016	9.93	10.06	9.87	10.02
4701	NYSE	NAT	Thu, Sep 29, 2016	10.00	10.07	9.85	9.85
4700	NYSE	NAT	Wed, Sep 28, 2016	9.95	10.06	9.87	10.03
4699	NYSE	NAT	Tue, Sep 27, 2016	9.87	9.99	9.76	9.89
4698	NYSE	NAT	Mon, Sep 26, 2016	10.80	10.85	10.56	10.59
4697	NYSE	NAT	Fri, Sep 23, 2016	10.84	11.01	10.73	10.75
4696	NYSE	NAT	Thu, Sep 22, 2016	10.85	10.90	10.60	10.84
4695	NYSE	NAT	Wed, Sep 21, 2016	10.51	10.85	10.51	10.80
4694	NYSE	NAT	Tue, Sep 20, 2016	10.57	10.74	10.37	10.40
4693	NYSE	NAT	Mon, Sep 19, 2016	10.51	10.66	10.50	10.61
4692	NYSE	NAT	Fri, Sep 16, 2016	10.08	10.46	10.01	10.43
4691	NYSE	NAT	Thu, Sep 15, 2016	10.11	10.17	9.96	10.03
4690	NYSE	NAT	Wed, Sep 14, 2016	10.21	10.30	10.07	10.10
4689	NYSE	NAT	Tue, Sep 13, 2016	10.41	10.47	10.16	10.23
4688	NYSE	NAT	Mon, Sep 12, 2016	10.24	10.59	10.14	10.50
4687	NYSE	NAT	Fri, Sep 9, 2016	10.70	10.75	10.36	10.36
4686	NYSE	NAT	Thu, Sep 8, 2016	10.57	10.90	10.47	10.86
4685	NYSE	NAT	Wed, Sep 7, 2016	10.28	10.55	10.25	10.39
4684	NYSE	NAT	Tue, Sep 6, 2016	10.16	10.34	10.02	10.28
4683	NYSE	NAT	Fri, Sep 2, 2016	10.10	10.28	10.07	10.13
4682	NYSE	NAT	Thu, Sep 1, 2016	10.15	10.19	9.96	10.05
4681	NYSE	NAT	Wed, Aug 31, 2016	10.49	10.54	10.13	10.17
4680	NYSE	NAT	Tue, Aug 30, 2016	10.85	10.92	10.36	10.48
4679	NYSE	NAT	Mon, Aug 29, 2016	9.96	10.12	9.92	10.00
4678	NYSE	NAT	Fri, Aug 26, 2016	10.19	10.26	9.91	9.97
4677	NYSE	NAT	Thu, Aug 25, 2016	10.39	10.46	10.12	10.19
4676	NYSE	NAT	Wed, Aug 24, 2016	10.73	10.79	10.41	10.46
4675	NYSE	NAT	Tue, Aug 23, 2016	10.64	10.79	10.58	10.68
4674	NYSE	NAT	Mon, Aug 22, 2016	10.75	10.75	10.51	10.54
4673	NYSE	NAT	Fri, Aug 19, 2016	11.00	11.01	10.77	10.79
4672	NYSE	NAT	Thu, Aug 18, 2016	11.11	11.43	10.96	11.03
4671	NYSE	NAT	Wed, Aug 17, 2016	11.38	11.40	10.80	10.97
4670	NYSE	NAT	Tue, Aug 16, 2016	11.71	11.83	11.34	11.39
4669	NYSE	NAT	Mon, Aug 15, 2016	11.93	12.06	11.69	11.74
4668	NYSE	NAT	Fri, Aug 12, 2016	12.33	12.35	12.08	11.85
4667	NYSE	NAT	Thu, Aug 11, 2016	12.28	12.35	12.15	12.25
4666	NYSE	NAT	Wed, Aug 10, 2016	12.22	12.34	12.17	12.29
4665	NYSE	NAT	Tue, Aug 9, 2016	12.39	12.41	12.15	12.20
4664	NYSE	NAT	Mon, Aug 8, 2016	12.39	12.40	11.97	12.36
4663	NYSE	NAT	Fri, Aug 5, 2016	11.91	12.01	11.83	11.93
4662	NYSE	NAT	Thu, Aug 4, 2016	11.89	12.15	11.89	11.90
4661	NYSE	NAT	Wed, Aug 3, 2016	11.70	11.96	11.65	11.95
4660	NYSE	NAT	Tue, Aug 2, 2016	12.05	12.19	11.51	11.74
4659	NYSE	NAT	Mon, Aug 1, 2016	12.20	12.32	11.95	12.09
4658	NYSE	NAT	Fri, Jul 29, 2016	12.09	12.28	11.73	12.19
4657	NYSE	NAT	Thu, Jul 28, 2016	12.32	12.42	11.58	12.08
4656	NYSE	NAT	Wed, Jul 27, 2016	12.98	13.01	12.65	12.67
4655	NYSE	NAT	Tue, Jul 26, 2016	12.90	13.23	12.90	12.99
4654	NYSE	NAT	Mon, Jul 25, 2016	13.18	13.23	12.90	12.94
4653	NYSE	NAT	Fri, Jul 22, 2016	13.23	13.31	13.03	13.25
4652	NYSE	NAT	Thu, Jul 21, 2016	13.45	13.51	13.21	13.23
4651	NYSE	NAT	Wed, Jul 20, 2016	13.49	13.54	13.34	13.41
4650	NYSE	NAT	Tue, Jul 19, 2016	13.86	13.88	13.38	13.44
4649	NYSE	NAT	Mon, Jul 18, 2016	13.71	13.95	13.69	13.86
4648	NYSE	NAT	Fri, Jul 15, 2016	13.67	13.73	13.52	13.68
4647	NYSE	NAT	Thu, Jul 14, 2016	13.79	13.86	13.59	13.62
4646	NYSE	NAT	Wed, Jul 13, 2016	14.08	14.21	13.64	13.73
4645	NYSE	NAT	Tue, Jul 12, 2016	13.88	14.28	13.85	14.05
4644	NYSE	NAT	Mon, Jul 11, 2016	13.32	13.85	13.32	13.80
4643	NYSE	NAT	Fri, Jul 8, 2016	13.14	13.43	12.96	13.23
4642	NYSE	NAT	Thu, Jul 7, 2016	13.53	13.55	12.89	12.95
4641	NYSE	NAT	Wed, Jul 6, 2016	13.68	13.69	13.39	13.53
4640	NYSE	NAT	Tue, Jul 5, 2016	13.95	14.18	13.63	13.74
4639	NYSE	NAT	Fri, Jul 1, 2016	13.78	14.08	13.75	14.08
4638	NYSE	NAT	Thu, Jun 30, 2016	13.78	13.88	13.43	13.77
4637	NYSE	NAT	Wed, Jun 29, 2016	14.12	14.15	13.79	13.85
4636	NYSE	NAT	Tue, Jun 28, 2016	13.94	14.08	13.79	13.94
4635	NYSE	NAT	Mon, Jun 27, 2016	14.12	14.17	13.63	13.66
4634	NYSE	NAT	Fri, Jun 24, 2016	14.03	14.69	13.84	14.31
4633	NYSE	NAT	Thu, Jun 23, 2016	14.25	14.46	14.17	14.46
4632	NYSE	NAT	Wed, Jun 22, 2016	14.32	14.47	14.12	14.12
4631	NYSE	NAT	Tue, Jun 21, 2016	14.48	14.71	14.31	14.33
4630	NYSE	NAT	Mon, Jun 20, 2016	14.43	14.60	14.20	14.38
4629	NYSE	NAT	Fri, Jun 17, 2016	14.50	14.62	14.13	14.19
4628	NYSE	NAT	Thu, Jun 16, 2016	14.37	14.51	14.12	14.44
4627	NYSE	NAT	Wed, Jun 15, 2016	14.53	14.55	14.20	14.43
4626	NYSE	NAT	Tue, Jun 14, 2016	15.21	15.36	14.50	14.55
4625	NYSE	NAT	Mon, Jun 13, 2016	15.56	15.76	15.09	15.23
4624	NYSE	NAT	Fri, Jun 10, 2016	15.79	15.92	15.61	15.67
4623	NYSE	NAT	Thu, Jun 9, 2016	15.52	15.93	15.40	15.86
4622	NYSE	NAT	Wed, Jun 8, 2016	15.23	15.63	15.17	15.55
4621	NYSE	NAT	Tue, Jun 7, 2016	15.02	15.28	14.88	15.25
4620	NYSE	NAT	Mon, Jun 6, 2016	14.89	15.10	14.86	15.00
4619	NYSE	NAT	Fri, Jun 3, 2016	14.86	15.06	14.84	14.89
4618	NYSE	NAT	Thu, Jun 2, 2016	15.12	15.12	14.71	14.85
4617	NYSE	NAT	Wed, Jun 1, 2016	15.15	15.20	14.82	15.12
4616	NYSE	NAT	Tue, May 31, 2016	15.08	15.36	15.06	15.23
4615	NYSE	NAT	Fri, May 27, 2016	14.96	15.11	14.75	14.99
4614	NYSE	NAT	Thu, May 26, 2016	14.67	14.92	14.67	14.82
4613	NYSE	NAT	Wed, May 25, 2016	14.36	14.81	14.31	14.59
4612	NYSE	NAT	Tue, May 24, 2016	13.93	14.33	13.84	14.31
4611	NYSE	NAT	Mon, May 23, 2016	13.82	14.00	13.79	13.87
4610	NYSE	NAT	Fri, May 20, 2016	13.47	13.88	13.40	13.84
4609	NYSE	NAT	Thu, May 19, 2016	13.20	13.51	13.02	13.44
4608	NYSE	NAT	Wed, May 18, 2016	13.96	13.97	13.22	13.30
4607	NYSE	NAT	Tue, May 17, 2016	14.08	14.22	13.98	14.00
4606	NYSE	NAT	Mon, May 16, 2016	14.52	14.52	13.99	14.17
4605	NYSE	NAT	Fri, May 13, 2016	14.51	14.61	14.37	14.45
4604	NYSE	NAT	Thu, May 12, 2016	14.86	14.99	14.49	14.53
4603	NYSE	NAT	Wed, May 11, 2016	14.87	14.97	14.76	14.76
4602	NYSE	NAT	Tue, May 10, 2016	15.32	15.40	14.34	14.87
4601	NYSE	NAT	Mon, May 9, 2016	15.21	16.04	15.18	15.84
4600	NYSE	NAT	Fri, May 6, 2016	15.12	15.19	14.97	15.15
4599	NYSE	NAT	Thu, May 5, 2016	15.18	15.41	15.02	15.10
4598	NYSE	NAT	Wed, May 4, 2016	15.10	15.27	14.87	15.04
4597	NYSE	NAT	Tue, May 3, 2016	15.57	15.63	14.90	15.14
4596	NYSE	NAT	Mon, May 2, 2016	15.31	15.72	14.99	15.71
4595	NYSE	NAT	Fri, Apr 29, 2016	15.01	15.28	14.88	15.27
4594	NYSE	NAT	Thu, Apr 28, 2016	14.98	15.15	14.85	14.97
4593	NYSE	NAT	Wed, Apr 27, 2016	14.87	15.07	14.83	15.00
4592	NYSE	NAT	Tue, Apr 26, 2016	14.79	14.98	14.70	14.80
4591	NYSE	NAT	Mon, Apr 25, 2016	14.54	14.92	14.45	14.68
4590	NYSE	NAT	Fri, Apr 22, 2016	14.61	14.70	14.37	14.49
4589	NYSE	NAT	Thu, Apr 21, 2016	14.89	14.91	14.58	14.71
4588	NYSE	NAT	Wed, Apr 20, 2016	14.68	14.92	14.62	14.88
4587	NYSE	NAT	Tue, Apr 19, 2016	14.57	14.71	14.48	14.69
4586	NYSE	NAT	Mon, Apr 18, 2016	14.27	14.59	14.20	14.47
4585	NYSE	NAT	Fri, Apr 15, 2016	14.37	14.37	14.27	14.28
4584	NYSE	NAT	Thu, Apr 14, 2016	14.22	14.41	14.14	14.37
4583	NYSE	NAT	Wed, Apr 13, 2016	14.16	14.31	13.91	14.17
4582	NYSE	NAT	Tue, Apr 12, 2016	14.06	14.54	14.05	14.15
4581	NYSE	NAT	Mon, Apr 11, 2016	13.97	14.26	13.97	14.07
4580	NYSE	NAT	Fri, Apr 8, 2016	13.97	14.07	13.83	13.93
4579	NYSE	NAT	Thu, Apr 7, 2016	13.79	13.95	13.72	13.87
4578	NYSE	NAT	Wed, Apr 6, 2016	13.92	13.95	13.75	13.82
4577	NYSE	NAT	Tue, Apr 5, 2016	13.64	13.64	13.64	13.87
4576	NYSE	NAT	Mon, Apr 4, 2016	13.84	13.91	13.55	13.64
4575	NYSE	NAT	Fri, Apr 1, 2016	13.88	13.98	13.80	13.90
4574	NYSE	NAT	Thu, Mar 31, 2016	14.04	14.33	13.81	13.97
4573	NYSE	NAT	Wed, Mar 30, 2016	14.18	14.29	13.93	13.97
4572	NYSE	NAT	Tue, Mar 29, 2016	13.88	14.10	13.80	14.10
4571	NYSE	NAT	Mon, Mar 28, 2016	14.15	14.18	13.69	13.92
4570	NYSE	NAT	Thu, Mar 24, 2016	13.55	14.17	13.16	14.15
4569	NYSE	NAT	Wed, Mar 23, 2016	14.44	14.54	13.53	13.71
4568	NYSE	NAT	Tue, Mar 22, 2016	14.44	14.67	14.37	14.51
4567	NYSE	NAT	Mon, Mar 21, 2016	14.52	14.66	14.30	14.51
4566	NYSE	NAT	Fri, Mar 18, 2016	14.57	14.69	14.39	14.56
4565	NYSE	NAT	Thu, Mar 17, 2016	14.17	14.64	14.15	14.51
4564	NYSE	NAT	Wed, Mar 16, 2016	13.79	14.17	13.79	14.17
4563	NYSE	NAT	Tue, Mar 15, 2016	13.98	14.08	13.60	13.79
4562	NYSE	NAT	Mon, Mar 14, 2016	13.74	14.22	13.55	14.15
4561	NYSE	NAT	Fri, Mar 11, 2016	13.50	13.50	13.50	13.75
4560	NYSE	NAT	Thu, Mar 10, 2016	13.36	13.86	12.94	13.50
4559	NYSE	NAT	Wed, Mar 9, 2016	12.96	13.34	12.96	13.23
4558	NYSE	NAT	Tue, Mar 8, 2016	13.25	13.48	12.89	12.94
4557	NYSE	NAT	Mon, Mar 7, 2016	13.58	13.65	13.20	13.32
4556	NYSE	NAT	Fri, Mar 4, 2016	13.38	13.92	13.28	13.66
4555	NYSE	NAT	Thu, Mar 3, 2016	13.14	13.14	13.14	13.27
4554	NYSE	NAT	Wed, Mar 2, 2016	13.18	13.31	12.70	13.14
4553	NYSE	NAT	Tue, Mar 1, 2016	13.85	13.94	13.16	13.20
4552	NYSE	NAT	Mon, Feb 29, 2016	13.82	14.22	13.65	13.70
4551	NYSE	NAT	Fri, Feb 26, 2016	13.58	13.82	13.19	13.74
4550	NYSE	NAT	Thu, Feb 25, 2016	13.30	13.95	13.16	13.50
4549	NYSE	NAT	Wed, Feb 24, 2016	12.87	13.42	12.57	13.37
4548	NYSE	NAT	Tue, Feb 23, 2016	13.16	13.17	12.84	12.97
4547	NYSE	NAT	Mon, Feb 22, 2016	12.78	13.16	12.71	13.16
4546	NYSE	NAT	Fri, Feb 19, 2016	12.90	12.90	12.52	12.74
4545	NYSE	NAT	Thu, Feb 18, 2016	13.38	13.50	12.91	13.00
4544	NYSE	NAT	Wed, Feb 17, 2016	13.28	13.76	13.16	13.38
4543	NYSE	NAT	Tue, Feb 16, 2016	12.52	13.43	12.49	13.09
4542	NYSE	NAT	Fri, Feb 12, 2016	11.49	12.45	11.31	12.31
4541	NYSE	NAT	Thu, Feb 11, 2016	10.70	11.64	10.70	11.41
4540	NYSE	NAT	Wed, Feb 10, 2016	11.21	11.22	10.70	10.88
4539	NYSE	NAT	Tue, Feb 9, 2016	11.76	11.79	10.91	11.04
4538	NYSE	NAT	Mon, Feb 8, 2016	10.60	12.78	9.85	11.84
4537	NYSE	NAT	Fri, Feb 5, 2016	11.55	11.61	11.13	11.15
4536	NYSE	NAT	Thu, Feb 4, 2016	11.89	12.02	11.30	11.55
4535	NYSE	NAT	Wed, Feb 3, 2016	11.89	12.11	11.25	12.01
4534	NYSE	NAT	Tue, Feb 2, 2016	12.39	12.39	11.76	11.85
4533	NYSE	NAT	Mon, Feb 1, 2016	12.49	12.58	12.19	12.51
4532	NYSE	NAT	Fri, Jan 29, 2016	12.59	12.91	12.49	12.60
4531	NYSE	NAT	Thu, Jan 28, 2016	12.64	12.71	12.40	12.61
4530	NYSE	NAT	Wed, Jan 27, 2016	12.91	13.00	12.39	12.41
4529	NYSE	NAT	Tue, Jan 26, 2016	12.81	13.07	12.77	12.96
4528	NYSE	NAT	Mon, Jan 25, 2016	13.30	13.46	12.70	12.73
4527	NYSE	NAT	Fri, Jan 22, 2016	13.89	14.11	13.50	13.74
4526	NYSE	NAT	Thu, Jan 21, 2016	13.32	13.78	13.23	13.67
4525	NYSE	NAT	Wed, Jan 20, 2016	12.96	13.60	12.64	13.32
4524	NYSE	NAT	Tue, Jan 19, 2016	13.03	13.33	12.96	13.24
4523	NYSE	NAT	Fri, Jan 15, 2016	12.90	13.00	12.64	12.92
4522	NYSE	NAT	Thu, Jan 14, 2016	13.53	13.55	12.78	13.21
4521	NYSE	NAT	Wed, Jan 13, 2016	13.78	13.83	13.16	13.31
4520	NYSE	NAT	Tue, Jan 12, 2016	14.02	14.04	12.70	13.20
4519	NYSE	NAT	Mon, Jan 11, 2016	14.52	14.64	13.51	13.84
4518	NYSE	NAT	Fri, Jan 8, 2016	14.70	14.87	14.44	14.52
4517	NYSE	NAT	Thu, Jan 7, 2016	14.67	14.83	14.45	14.60
4516	NYSE	NAT	Wed, Jan 6, 2016	14.74	15.16	14.62	14.91
4515	NYSE	NAT	Tue, Jan 5, 2016	15.02	15.21	14.64	14.90
4514	NYSE	NAT	Mon, Jan 4, 2016	15.17	15.43	14.91	15.01
4513	NYSE	NAT	Thu, Dec 31, 2015	15.56	15.56	15.26	15.40
4512	NYSE	NAT	Wed, Dec 30, 2015	15.00	15.57	14.89	15.50
4511	NYSE	NAT	Tue, Dec 29, 2015	14.86	15.03	14.63	14.98
4510	NYSE	NAT	Mon, Dec 28, 2015	14.68	14.71	14.38	14.58
4509	NYSE	NAT	Thu, Dec 24, 2015	14.67	14.81	14.60	14.71
4508	NYSE	NAT	Wed, Dec 23, 2015	14.37	14.67	14.26	14.67
4507	NYSE	NAT	Tue, Dec 22, 2015	14.29	14.41	14.12	14.29
4506	NYSE	NAT	Mon, Dec 21, 2015	14.22	14.41	14.00	14.22
4505	NYSE	NAT	Fri, Dec 18, 2015	14.00	14.47	13.94	14.19
4504	NYSE	NAT	Thu, Dec 17, 2015	14.71	14.72	13.63	13.88
4503	NYSE	NAT	Wed, Dec 16, 2015	14.47	14.80	14.24	14.78
4502	NYSE	NAT	Tue, Dec 15, 2015	14.87	14.87	14.19	14.30
4501	NYSE	NAT	Mon, Dec 14, 2015	14.12	14.89	14.07	14.88
4500	NYSE	NAT	Fri, Dec 11, 2015	14.67	14.69	14.12	14.15
4499	NYSE	NAT	Thu, Dec 10, 2015	15.02	15.09	14.79	14.84
4498	NYSE	NAT	Wed, Dec 9, 2015	14.77	15.10	14.70	15.06
4497	NYSE	NAT	Tue, Dec 8, 2015	14.44	14.80	14.38	14.73
4496	NYSE	NAT	Mon, Dec 7, 2015	14.86	14.92	14.21	14.59
4495	NYSE	NAT	Fri, Dec 4, 2015	14.49	14.90	14.43	14.88
4494	NYSE	NAT	Thu, Dec 3, 2015	14.46	14.70	14.28	14.30
4493	NYSE	NAT	Wed, Dec 2, 2015	14.86	14.98	14.29	14.48
4492	NYSE	NAT	Tue, Dec 1, 2015	14.59	14.99	14.54	14.81
4491	NYSE	NAT	Mon, Nov 30, 2015	14.85	14.87	14.49	14.67
4490	NYSE	NAT	Fri, Nov 27, 2015	14.51	14.92	14.50	14.84
4489	NYSE	NAT	Wed, Nov 25, 2015	14.74	14.86	14.33	14.49
4488	NYSE	NAT	Tue, Nov 24, 2015	14.92	15.11	14.64	14.78
4487	NYSE	NAT	Mon, Nov 23, 2015	15.06	15.07	14.76	14.98
4486	NYSE	NAT	Fri, Nov 20, 2015	15.04	15.10	14.90	15.04
4485	NYSE	NAT	Thu, Nov 19, 2015	15.20	15.21	15.00	15.02
4484	NYSE	NAT	Wed, Nov 18, 2015	14.99	15.26	14.93	15.24
4483	NYSE	NAT	Tue, Nov 17, 2015	15.25	15.29	14.80	14.97
4482	NYSE	NAT	Mon, Nov 16, 2015	14.75	15.26	14.75	15.26
4481	NYSE	NAT	Fri, Nov 13, 2015	14.90	15.17	14.72	14.74
4480	NYSE	NAT	Thu, Nov 12, 2015	14.77	15.25	14.72	14.93
4479	NYSE	NAT	Wed, Nov 11, 2015	15.17	15.66	14.74	14.92
4478	NYSE	NAT	Tue, Nov 10, 2015	15.23	15.35	14.69	15.03
4477	NYSE	NAT	Mon, Nov 9, 2015	14.99	15.35	14.90	15.31
4476	NYSE	NAT	Fri, Nov 6, 2015	14.47	15.01	14.22	15.01
4475	NYSE	NAT	Thu, Nov 5, 2015	14.87	14.92	14.08	14.46
4474	NYSE	NAT	Wed, Nov 4, 2015	15.28	15.35	14.80	14.89
4473	NYSE	NAT	Tue, Nov 3, 2015	15.24	15.43	15.02	15.27
4472	NYSE	NAT	Mon, Nov 2, 2015	15.12	15.51	14.99	15.32
4471	NYSE	NAT	Fri, Oct 30, 2015	14.95	15.26	14.82	15.15
4470	NYSE	NAT	Thu, Oct 29, 2015	14.95	15.38	14.87	14.93
4469	NYSE	NAT	Wed, Oct 28, 2015	14.71	15.21	14.62	15.00
4468	NYSE	NAT	Tue, Oct 27, 2015	15.36	15.36	14.52	14.69
4467	NYSE	NAT	Mon, Oct 26, 2015	16.21	16.35	15.71	15.77
4466	NYSE	NAT	Fri, Oct 23, 2015	16.47	16.47	16.01	16.17
4465	NYSE	NAT	Thu, Oct 22, 2015	16.37	16.47	16.21	16.26
4464	NYSE	NAT	Wed, Oct 21, 2015	16.25	16.53	16.11	16.25
4463	NYSE	NAT	Tue, Oct 20, 2015	16.07	16.19	15.81	16.15
4462	NYSE	NAT	Mon, Oct 19, 2015	15.86	15.86	15.43	15.86
4461	NYSE	NAT	Fri, Oct 16, 2015	15.51	15.61	15.34	15.55
4460	NYSE	NAT	Thu, Oct 15, 2015	15.46	15.49	15.18	15.48
4459	NYSE	NAT	Wed, Oct 14, 2015	15.84	15.86	15.20	15.35
4458	NYSE	NAT	Tue, Oct 13, 2015	16.46	16.87	15.95	15.98
4457	NYSE	NAT	Mon, Oct 12, 2015	16.14	16.60	16.09	16.48
4456	NYSE	NAT	Fri, Oct 9, 2015	16.32	16.34	15.97	16.05
4455	NYSE	NAT	Thu, Oct 8, 2015	16.31	16.35	16.02	16.24
4454	NYSE	NAT	Wed, Oct 7, 2015	16.34	16.43	15.78	16.31
4453	NYSE	NAT	Tue, Oct 6, 2015	16.60	16.75	15.71	16.16
4452	NYSE	NAT	Mon, Oct 5, 2015	16.09	16.69	16.06	16.64
4451	NYSE	NAT	Fri, Oct 2, 2015	15.28	15.93	15.19	15.92
4450	NYSE	NAT	Thu, Oct 1, 2015	15.18	15.48	15.12	15.37
4449	NYSE	NAT	Wed, Sep 30, 2015	14.83	15.11	14.68	15.07
4448	NYSE	NAT	Tue, Sep 29, 2015	14.97	15.11	14.55	14.67
4447	NYSE	NAT	Mon, Sep 28, 2015	15.24	15.25	14.73	14.95
4446	NYSE	NAT	Fri, Sep 25, 2015	15.49	15.81	15.20	15.31
4445	NYSE	NAT	Thu, Sep 24, 2015	15.55	15.60	15.13	15.46
4444	NYSE	NAT	Wed, Sep 23, 2015	16.15	16.20	15.42	15.60
4443	NYSE	NAT	Tue, Sep 22, 2015	15.71	16.17	15.51	16.17
4442	NYSE	NAT	Mon, Sep 21, 2015	15.73	16.05	15.58	15.78
4441	NYSE	NAT	Fri, Sep 18, 2015	15.19	15.97	15.15	15.68
4440	NYSE	NAT	Thu, Sep 17, 2015	14.82	15.55	14.82	15.42
4439	NYSE	NAT	Wed, Sep 16, 2015	14.48	14.85	14.48	14.82
4438	NYSE	NAT	Tue, Sep 15, 2015	14.33	14.56	14.30	14.49
4437	NYSE	NAT	Mon, Sep 14, 2015	14.53	14.56	14.14	14.32
4436	NYSE	NAT	Fri, Sep 11, 2015	14.63	14.67	14.34	14.48
4435	NYSE	NAT	Thu, Sep 10, 2015	14.42	14.73	14.38	14.66
4434	NYSE	NAT	Wed, Sep 9, 2015	14.85	14.96	14.49	14.51
4433	NYSE	NAT	Tue, Sep 8, 2015	14.70	14.86	14.55	14.69
4432	NYSE	NAT	Fri, Sep 4, 2015	14.38	14.67	14.22	14.53
4431	NYSE	NAT	Thu, Sep 3, 2015	14.10	14.74	14.08	14.57
4430	NYSE	NAT	Wed, Sep 2, 2015	13.94	14.06	13.67	14.02
4429	NYSE	NAT	Tue, Sep 1, 2015	13.28	13.78	13.20	13.77
4428	NYSE	NAT	Mon, Aug 31, 2015	13.93	13.97	13.45	13.51
4427	NYSE	NAT	Fri, Aug 28, 2015	14.10	14.19	13.75	13.99
4426	NYSE	NAT	Thu, Aug 27, 2015	14.09	14.10	13.69	14.10
4425	NYSE	NAT	Wed, Aug 26, 2015	13.31	13.63	12.88	13.61
4424	NYSE	NAT	Tue, Aug 25, 2015	13.07	13.14	12.70	12.96
4423	NYSE	NAT	Mon, Aug 24, 2015	12.93	13.43	12.20	12.40
4422	NYSE	NAT	Fri, Aug 21, 2015	13.42	13.95	13.39	13.79
4421	NYSE	NAT	Thu, Aug 20, 2015	14.16	14.26	13.69	13.70
4420	NYSE	NAT	Wed, Aug 19, 2015	14.54	14.61	14.22	14.29
4419	NYSE	NAT	Tue, Aug 18, 2015	15.06	15.11	14.62	14.64
4418	NYSE	NAT	Mon, Aug 17, 2015	14.83	15.15	14.65	15.11
4417	NYSE	NAT	Fri, Aug 14, 2015	14.90	15.02	14.57	14.85
4416	NYSE	NAT	Thu, Aug 13, 2015	14.26	15.09	14.25	14.96
4415	NYSE	NAT	Wed, Aug 12, 2015	14.08	14.44	13.84	14.24
4414	NYSE	NAT	Tue, Aug 11, 2015	14.37	14.46	14.10	14.34
4413	NYSE	NAT	Mon, Aug 10, 2015	14.95	14.95	14.05	14.34
4412	NYSE	NAT	Fri, Aug 7, 2015	14.72	14.91	14.65	14.74
4411	NYSE	NAT	Thu, Aug 6, 2015	14.90	15.01	14.57	14.72
4410	NYSE	NAT	Wed, Aug 5, 2015	14.98	15.09	14.83	14.92
4409	NYSE	NAT	Tue, Aug 4, 2015	15.07	15.21	14.64	14.87
4408	NYSE	NAT	Mon, Aug 3, 2015	14.87	15.29	14.77	15.10
4407	NYSE	NAT	Fri, Jul 31, 2015	14.85	15.03	14.57	14.89
4406	NYSE	NAT	Thu, Jul 30, 2015	15.12	15.22	14.65	14.86
4405	NYSE	NAT	Wed, Jul 29, 2015	15.28	15.46	15.02	15.32
4404	NYSE	NAT	Tue, Jul 28, 2015	15.33	15.43	15.00	15.27
4403	NYSE	NAT	Mon, Jul 27, 2015	15.41	15.50	15.00	15.33
4402	NYSE	NAT	Fri, Jul 24, 2015	16.31	16.79	15.61	15.88
4401	NYSE	NAT	Thu, Jul 23, 2015	17.03	17.10	16.21	16.30
4400	NYSE	NAT	Wed, Jul 22, 2015	17.10	17.30	16.85	16.95
4399	NYSE	NAT	Tue, Jul 21, 2015	16.70	17.19	16.60	17.12
4398	NYSE	NAT	Mon, Jul 20, 2015	16.50	16.73	16.41	16.46
4397	NYSE	NAT	Fri, Jul 17, 2015	16.60	17.04	16.30	16.41
4396	NYSE	NAT	Thu, Jul 16, 2015	15.86	16.61	15.78	16.46
4395	NYSE	NAT	Wed, Jul 15, 2015	15.86	16.00	15.65	15.74
4394	NYSE	NAT	Tue, Jul 14, 2015	15.16	15.80	15.07	15.72
4393	NYSE	NAT	Mon, Jul 13, 2015	14.87	15.16	14.86	14.99
4392	NYSE	NAT	Fri, Jul 10, 2015	14.57	14.82	14.53	14.81
4391	NYSE	NAT	Thu, Jul 9, 2015	14.69	14.87	14.41	14.52
4390	NYSE	NAT	Wed, Jul 8, 2015	14.58	14.62	14.31	14.45
4389	NYSE	NAT	Tue, Jul 7, 2015	14.83	14.85	14.32	14.61
4388	NYSE	NAT	Mon, Jul 6, 2015	14.58	15.01	14.54	14.81
4387	NYSE	NAT	Thu, Jul 2, 2015	14.57	14.74	14.53	14.66
4386	NYSE	NAT	Wed, Jul 1, 2015	14.14	14.63	14.13	14.53
4385	NYSE	NAT	Tue, Jun 30, 2015	14.17	14.27	13.97	14.10
4384	NYSE	NAT	Mon, Jun 29, 2015	13.84	14.31	13.79	14.11
4383	NYSE	NAT	Fri, Jun 26, 2015	14.11	14.30	13.73	13.78
4382	NYSE	NAT	Thu, Jun 25, 2015	14.49	14.51	13.96	14.11
4381	NYSE	NAT	Wed, Jun 24, 2015	14.76	14.87	14.41	14.51
4380	NYSE	NAT	Tue, Jun 23, 2015	14.53	14.81	14.50	14.67
4379	NYSE	NAT	Mon, Jun 22, 2015	14.33	14.51	14.21	14.49
4378	NYSE	NAT	Fri, Jun 19, 2015	14.03	14.17	13.87	14.13
4377	NYSE	NAT	Thu, Jun 18, 2015	13.64	13.95	13.64	13.80
4376	NYSE	NAT	Wed, Jun 17, 2015	13.60	13.62	13.42	13.60
4375	NYSE	NAT	Tue, Jun 16, 2015	13.64	13.70	13.51	13.57
4374	NYSE	NAT	Mon, Jun 15, 2015	13.76	13.77	13.51	13.61
4373	NYSE	NAT	Fri, Jun 12, 2015	13.67	13.78	13.53	13.76
4372	NYSE	NAT	Thu, Jun 11, 2015	13.56	13.69	13.49	13.68
4371	NYSE	NAT	Wed, Jun 10, 2015	13.51	13.58	13.41	13.55
4370	NYSE	NAT	Tue, Jun 9, 2015	13.49	13.59	13.29	13.40
4369	NYSE	NAT	Mon, Jun 8, 2015	13.26	13.58	13.20	13.48
4368	NYSE	NAT	Fri, Jun 5, 2015	12.93	13.20	12.87	13.02
4367	NYSE	NAT	Thu, Jun 4, 2015	13.05	13.13	12.85	12.94
4366	NYSE	NAT	Wed, Jun 3, 2015	13.07	13.21	12.99	13.07
4365	NYSE	NAT	Tue, Jun 2, 2015	12.91	13.16	12.91	13.03
4364	NYSE	NAT	Mon, Jun 1, 2015	12.82	12.95	12.57	12.94
4363	NYSE	NAT	Fri, May 29, 2015	12.88	12.92	12.63	12.80
4362	NYSE	NAT	Thu, May 28, 2015	12.60	13.02	12.59	12.88
4361	NYSE	NAT	Wed, May 27, 2015	12.49	12.59	12.39	12.55
4360	NYSE	NAT	Tue, May 26, 2015	12.78	12.91	12.40	12.47
4359	NYSE	NAT	Fri, May 22, 2015	12.74	12.97	12.74	12.89
4358	NYSE	NAT	Thu, May 21, 2015	12.64	12.78	12.56	12.71
4357	NYSE	NAT	Wed, May 20, 2015	12.51	12.68	12.39	12.64
4356	NYSE	NAT	Tue, May 19, 2015	12.27	12.52	12.26	12.51
4355	NYSE	NAT	Mon, May 18, 2015	12.39	12.55	12.20	12.32
4354	NYSE	NAT	Fri, May 15, 2015	12.16	12.37	12.14	12.34
4353	NYSE	NAT	Thu, May 14, 2015	11.77	12.09	11.77	12.00
4352	NYSE	NAT	Wed, May 13, 2015	11.86	11.91	11.53	11.75
4351	NYSE	NAT	Tue, May 12, 2015	11.63	12.09	11.60	11.84
4350	NYSE	NAT	Mon, May 11, 2015	11.69	12.07	11.51	11.54
4349	NYSE	NAT	Fri, May 8, 2015	11.40	11.46	11.21	11.24
4348	NYSE	NAT	Thu, May 7, 2015	11.31	11.42	11.10	11.24
4347	NYSE	NAT	Wed, May 6, 2015	11.34	11.44	11.26	11.32
4346	NYSE	NAT	Tue, May 5, 2015	11.88	11.92	11.27	11.30
4345	NYSE	NAT	Mon, May 4, 2015	12.23	12.34	12.16	12.23
4344	NYSE	NAT	Fri, May 1, 2015	12.14	12.22	12.04	12.14
4343	NYSE	NAT	Thu, Apr 30, 2015	12.33	12.41	11.85	12.12
4342	NYSE	NAT	Wed, Apr 29, 2015	12.67	12.71	12.23	12.34
4341	NYSE	NAT	Tue, Apr 28, 2015	12.62	12.78	12.61	12.69
4340	NYSE	NAT	Mon, Apr 27, 2015	12.96	12.97	12.54	12.58
4339	NYSE	NAT	Fri, Apr 24, 2015	12.90	13.03	12.89	12.96
4338	NYSE	NAT	Thu, Apr 23, 2015	12.83	13.00	12.79	12.92
4337	NYSE	NAT	Wed, Apr 22, 2015	12.90	12.96	12.79	12.83
4336	NYSE	NAT	Tue, Apr 21, 2015	12.79	12.97	12.66	12.88
4335	NYSE	NAT	Mon, Apr 20, 2015	12.56	12.93	12.52	12.75
4334	NYSE	NAT	Fri, Apr 17, 2015	12.46	12.64	12.35	12.56
4333	NYSE	NAT	Thu, Apr 16, 2015	12.56	12.58	12.35	12.49
4332	NYSE	NAT	Wed, Apr 15, 2015	12.81	12.81	12.43	12.53
4331	NYSE	NAT	Tue, Apr 14, 2015	12.67	12.97	12.55	12.73
4330	NYSE	NAT	Mon, Apr 13, 2015	12.44	12.63	12.35	12.53
4329	NYSE	NAT	Fri, Apr 10, 2015	12.14	12.51	12.08	12.39
4328	NYSE	NAT	Thu, Apr 9, 2015	12.20	12.40	11.93	12.04
4327	NYSE	NAT	Wed, Apr 8, 2015	11.94	12.27	11.94	12.20
4326	NYSE	NAT	Tue, Apr 7, 2015	12.50	12.60	11.89	11.91
4325	NYSE	NAT	Mon, Apr 6, 2015	12.19	12.58	12.10	12.50
4324	NYSE	NAT	Thu, Apr 2, 2015	12.10	12.19	11.93	12.16
4323	NYSE	NAT	Wed, Apr 1, 2015	11.83	12.25	11.76	12.07
4322	NYSE	NAT	Tue, Mar 31, 2015	11.62	11.83	11.50	11.81
4321	NYSE	NAT	Mon, Mar 30, 2015	11.80	11.81	11.54	11.66
4320	NYSE	NAT	Fri, Mar 27, 2015	11.65	11.83	11.50	11.78
4319	NYSE	NAT	Thu, Mar 26, 2015	11.60	11.78	11.51	11.67
4318	NYSE	NAT	Wed, Mar 25, 2015	11.68	11.68	11.46	11.51
4317	NYSE	NAT	Tue, Mar 24, 2015	11.25	11.75	11.22	11.63
4316	NYSE	NAT	Mon, Mar 23, 2015	11.15	11.31	11.15	11.28
4315	NYSE	NAT	Fri, Mar 20, 2015	11.32	11.49	11.11	11.14
4314	NYSE	NAT	Thu, Mar 19, 2015	10.91	11.44	10.91	11.26
4313	NYSE	NAT	Wed, Mar 18, 2015	10.19	10.72	10.12	10.71
4312	NYSE	NAT	Tue, Mar 17, 2015	10.22	10.28	10.14	10.22
4311	NYSE	NAT	Mon, Mar 16, 2015	10.34	10.34	10.13	10.21
4310	NYSE	NAT	Fri, Mar 13, 2015	10.31	10.33	10.20	10.32
4309	NYSE	NAT	Thu, Mar 12, 2015	10.35	10.38	10.16	10.28
4308	NYSE	NAT	Wed, Mar 11, 2015	10.06	10.37	10.06	10.30
4307	NYSE	NAT	Tue, Mar 10, 2015	9.91	10.09	9.86	10.03
4306	NYSE	NAT	Mon, Mar 9, 2015	10.04	10.13	9.94	9.97
4305	NYSE	NAT	Fri, Mar 6, 2015	9.93	10.05	9.91	10.01
4304	NYSE	NAT	Thu, Mar 5, 2015	10.11	10.18	9.92	10.02
4303	NYSE	NAT	Wed, Mar 4, 2015	10.09	10.23	10.01	10.11
4302	NYSE	NAT	Tue, Mar 3, 2015	10.00	10.24	9.94	10.12
4301	NYSE	NAT	Mon, Mar 2, 2015	10.16	10.19	9.93	10.05
4300	NYSE	NAT	Fri, Feb 27, 2015	10.07	10.24	10.03	10.14
4299	NYSE	NAT	Thu, Feb 26, 2015	10.15	10.17	9.89	10.03
4298	NYSE	NAT	Wed, Feb 25, 2015	9.95	10.22	9.91	10.12
4297	NYSE	NAT	Tue, Feb 24, 2015	10.01	10.04	9.93	9.96
4296	NYSE	NAT	Mon, Feb 23, 2015	10.15	10.16	9.97	10.00
4295	NYSE	NAT	Fri, Feb 20, 2015	10.32	10.34	10.14	10.17
4294	NYSE	NAT	Thu, Feb 19, 2015	10.20	10.58	10.02	10.34
4293	NYSE	NAT	Wed, Feb 18, 2015	9.92	10.27	9.92	10.22
4292	NYSE	NAT	Tue, Feb 17, 2015	10.05	10.11	9.94	9.96
4291	NYSE	NAT	Fri, Feb 13, 2015	10.07	10.16	9.98	10.11
4290	NYSE	NAT	Thu, Feb 12, 2015	10.10	10.19	9.90	10.01
4289	NYSE	NAT	Wed, Feb 11, 2015	9.58	10.22	9.58	10.09
4288	NYSE	NAT	Tue, Feb 10, 2015	9.36	9.78	9.32	9.58
4287	NYSE	NAT	Mon, Feb 9, 2015	9.97	9.97	9.07	9.33
4286	NYSE	NAT	Fri, Feb 6, 2015	10.32	10.45	9.90	9.92
4285	NYSE	NAT	Thu, Feb 5, 2015	10.21	10.42	10.18	10.36
4284	NYSE	NAT	Wed, Feb 4, 2015	9.96	10.24	9.95	10.13
4283	NYSE	NAT	Tue, Feb 3, 2015	10.17	10.34	9.97	10.03
4282	NYSE	NAT	Mon, Feb 2, 2015	10.03	10.30	10.03	10.17
4281	NYSE	NAT	Fri, Jan 30, 2015	10.15	10.27	9.97	10.03
4280	NYSE	NAT	Thu, Jan 29, 2015	10.34	10.41	9.99	10.22
4279	NYSE	NAT	Wed, Jan 28, 2015	10.70	10.70	10.30	10.34
4278	NYSE	NAT	Tue, Jan 27, 2015	10.62	10.73	10.57	10.69
4277	NYSE	NAT	Mon, Jan 26, 2015	10.70	10.79	10.65	10.70
4276	NYSE	NAT	Fri, Jan 23, 2015	10.67	10.71	10.50	10.69
4275	NYSE	NAT	Thu, Jan 22, 2015	10.36	10.74	10.32	10.69
4274	NYSE	NAT	Wed, Jan 21, 2015	10.88	10.93	10.26	10.46
4273	NYSE	NAT	Tue, Jan 20, 2015	11.48	11.48	10.55	10.89
4272	NYSE	NAT	Fri, Jan 16, 2015	11.34	11.49	11.19	11.45
4271	NYSE	NAT	Thu, Jan 15, 2015	11.60	11.72	11.28	11.31
4270	NYSE	NAT	Wed, Jan 14, 2015	11.54	11.76	11.36	11.54
4269	NYSE	NAT	Tue, Jan 13, 2015	11.68	11.81	11.47	11.73
4268	NYSE	NAT	Mon, Jan 12, 2015	11.72	11.97	11.44	11.56
4267	NYSE	NAT	Fri, Jan 9, 2015	11.91	11.91	11.08	11.51
4266	NYSE	NAT	Thu, Jan 8, 2015	11.20	11.83	11.19	11.78
4265	NYSE	NAT	Wed, Jan 7, 2015	10.74	11.13	10.65	11.09
4264	NYSE	NAT	Tue, Jan 6, 2015	10.40	10.78	10.30	10.60
4263	NYSE	NAT	Mon, Jan 5, 2015	10.08	10.22	9.94	10.14
4262	NYSE	NAT	Fri, Jan 2, 2015	9.98	10.16	9.86	10.12
4261	NYSE	NAT	Wed, Dec 31, 2014	9.91	10.01	9.83	9.98
4260	NYSE	NAT	Tue, Dec 30, 2014	9.91	9.99	9.82	9.93
4259	NYSE	NAT	Mon, Dec 29, 2014	10.09	10.09	9.74	9.92
4258	NYSE	NAT	Fri, Dec 26, 2014	10.13	10.21	10.02	10.07
4257	NYSE	NAT	Wed, Dec 24, 2014	10.15	10.32	10.11	10.17
4256	NYSE	NAT	Tue, Dec 23, 2014	9.89	10.23	9.88	10.13
4255	NYSE	NAT	Mon, Dec 22, 2014	9.80	9.93	9.73	9.83
4254	NYSE	NAT	Fri, Dec 19, 2014	9.89	9.95	9.70	9.84
4253	NYSE	NAT	Thu, Dec 18, 2014	9.72	9.96	9.62	9.90
4252	NYSE	NAT	Wed, Dec 17, 2014	9.40	9.63	9.34	9.63
4251	NYSE	NAT	Tue, Dec 16, 2014	9.30	9.59	9.27	9.44
4250	NYSE	NAT	Mon, Dec 15, 2014	9.32	9.52	9.22	9.37
4249	NYSE	NAT	Fri, Dec 12, 2014	8.80	9.31	8.78	9.18
4248	NYSE	NAT	Thu, Dec 11, 2014	8.92	9.08	8.80	8.81
4247	NYSE	NAT	Wed, Dec 10, 2014	8.86	8.97	8.79	8.89
4246	NYSE	NAT	Tue, Dec 9, 2014	8.43	9.00	8.38	8.93
4245	NYSE	NAT	Mon, Dec 8, 2014	9.05	9.08	8.45	8.51
4244	NYSE	NAT	Fri, Dec 5, 2014	9.10	9.24	9.10	9.11
4243	NYSE	NAT	Thu, Dec 4, 2014	9.17	9.29	9.11	9.12
4242	NYSE	NAT	Wed, Dec 3, 2014	9.06	9.31	9.00	9.21
4241	NYSE	NAT	Tue, Dec 2, 2014	8.89	9.25	8.89	9.04
4240	NYSE	NAT	Mon, Dec 1, 2014	9.10	9.15	8.74	8.89
4239	NYSE	NAT	Fri, Nov 28, 2014	8.72	9.15	8.58	8.88
4238	NYSE	NAT	Wed, Nov 26, 2014	8.76	8.93	8.68	8.75
4237	NYSE	NAT	Tue, Nov 25, 2014	9.09	9.12	8.43	8.73
4236	NYSE	NAT	Mon, Nov 24, 2014	9.04	9.14	8.99	9.10
4235	NYSE	NAT	Fri, Nov 21, 2014	8.93	9.17	8.90	9.03
4234	NYSE	NAT	Thu, Nov 20, 2014	8.53	8.89	8.51	8.85
4233	NYSE	NAT	Wed, Nov 19, 2014	8.43	8.50	8.14	8.46
4232	NYSE	NAT	Tue, Nov 18, 2014	8.41	8.52	8.40	8.45
4231	NYSE	NAT	Mon, Nov 17, 2014	8.30	8.43	8.25	8.38
4230	NYSE	NAT	Fri, Nov 14, 2014	8.09	8.35	8.09	8.30
4229	NYSE	NAT	Thu, Nov 13, 2014	8.34	8.37	8.19	8.29
4228	NYSE	NAT	Wed, Nov 12, 2014	8.18	8.41	8.16	8.34
4227	NYSE	NAT	Tue, Nov 11, 2014	8.64	8.65	8.26	8.26
4226	NYSE	NAT	Mon, Nov 10, 2014	8.58	8.80	8.37	8.60
4225	NYSE	NAT	Fri, Nov 7, 2014	8.30	8.40	8.26	8.37
4224	NYSE	NAT	Thu, Nov 6, 2014	8.14	8.39	8.10	8.31
4223	NYSE	NAT	Wed, Nov 5, 2014	8.21	8.32	8.10	8.16
4222	NYSE	NAT	Tue, Nov 4, 2014	8.28	8.37	8.10	8.14
4221	NYSE	NAT	Mon, Nov 3, 2014	8.36	8.51	8.18	8.33
4220	NYSE	NAT	Fri, Oct 31, 2014	8.44	8.47	8.18	8.38
4219	NYSE	NAT	Thu, Oct 30, 2014	8.54	8.55	8.33	8.39
4218	NYSE	NAT	Wed, Oct 29, 2014	8.29	8.61	8.29	8.55
4217	NYSE	NAT	Tue, Oct 28, 2014	7.77	8.28	7.69	8.25
4216	NYSE	NAT	Mon, Oct 27, 2014	7.65	7.73	7.49	7.71
4215	NYSE	NAT	Fri, Oct 24, 2014	7.71	7.78	7.60	7.73
4214	NYSE	NAT	Thu, Oct 23, 2014	7.75	7.91	7.68	7.73
4213	NYSE	NAT	Wed, Oct 22, 2014	7.92	8.14	7.69	7.69
4212	NYSE	NAT	Tue, Oct 21, 2014	7.76	7.92	7.76	7.90
4211	NYSE	NAT	Mon, Oct 20, 2014	7.69	7.95	7.67	7.75
4210	NYSE	NAT	Fri, Oct 17, 2014	8.07	8.19	7.86	7.88
4209	NYSE	NAT	Thu, Oct 16, 2014	7.39	8.06	7.31	7.97
4208	NYSE	NAT	Wed, Oct 15, 2014	7.18	7.53	7.06	7.48
4207	NYSE	NAT	Tue, Oct 14, 2014	7.19	7.38	7.05	7.23
4206	NYSE	NAT	Mon, Oct 13, 2014	7.21	7.39	7.13	7.13
4205	NYSE	NAT	Fri, Oct 10, 2014	7.27	7.38	6.89	7.21
4204	NYSE	NAT	Thu, Oct 9, 2014	7.65	7.73	7.29	7.31
4203	NYSE	NAT	Wed, Oct 8, 2014	7.78	7.80	7.45	7.64
4202	NYSE	NAT	Tue, Oct 7, 2014	7.78	8.01	7.76	7.80
4201	NYSE	NAT	Mon, Oct 6, 2014	7.83	7.92	7.74	7.84
4200	NYSE	NAT	Fri, Oct 3, 2014	7.98	7.99	7.82	7.82
4199	NYSE	NAT	Thu, Oct 2, 2014	7.80	7.97	7.74	7.92
4198	NYSE	NAT	Wed, Oct 1, 2014	7.83	8.03	7.73	7.81
4197	NYSE	NAT	Tue, Sep 30, 2014	8.02	8.14	7.88	7.88
4196	NYSE	NAT	Mon, Sep 29, 2014	7.99	8.05	7.95	8.02
4195	NYSE	NAT	Fri, Sep 26, 2014	7.96	8.08	7.94	8.07
4194	NYSE	NAT	Thu, Sep 25, 2014	8.11	8.17	7.90	7.94
4193	NYSE	NAT	Wed, Sep 24, 2014	8.17	8.20	8.03	8.10
4192	NYSE	NAT	Tue, Sep 23, 2014	8.17	8.31	8.12	8.18
4191	NYSE	NAT	Mon, Sep 22, 2014	8.34	8.34	8.10	8.19
4190	NYSE	NAT	Fri, Sep 19, 2014	8.54	8.66	8.35	8.36
4189	NYSE	NAT	Thu, Sep 18, 2014	8.66	8.71	8.47	8.52
4188	NYSE	NAT	Wed, Sep 17, 2014	8.63	8.72	8.63	8.65
4187	NYSE	NAT	Tue, Sep 16, 2014	8.52	8.65	8.50	8.61
4186	NYSE	NAT	Mon, Sep 15, 2014	8.54	8.60	8.45	8.56
4185	NYSE	NAT	Fri, Sep 12, 2014	8.72	8.74	8.51	8.56
4184	NYSE	NAT	Thu, Sep 11, 2014	8.78	8.79	8.65	8.75
4183	NYSE	NAT	Wed, Sep 10, 2014	8.73	8.89	8.69	8.85
4182	NYSE	NAT	Tue, Sep 9, 2014	8.77	8.82	8.67	8.73
4181	NYSE	NAT	Mon, Sep 8, 2014	8.67	8.83	8.64	8.83
4180	NYSE	NAT	Fri, Sep 5, 2014	8.55	8.71	8.42	8.69
4179	NYSE	NAT	Thu, Sep 4, 2014	8.68	8.75	8.52	8.55
4178	NYSE	NAT	Wed, Sep 3, 2014	8.90	8.93	8.67	8.68
4177	NYSE	NAT	Tue, Sep 2, 2014	8.96	8.97	8.82	8.87
4176	NYSE	NAT	Fri, Aug 29, 2014	8.91	9.00	8.82	8.98
4175	NYSE	NAT	Thu, Aug 28, 2014	9.03	9.04	8.78	8.93
4174	NYSE	NAT	Wed, Aug 27, 2014	9.10	9.19	9.03	9.05
4173	NYSE	NAT	Tue, Aug 26, 2014	9.06	9.13	8.97	9.07
4172	NYSE	NAT	Mon, Aug 25, 2014	9.02	9.09	8.96	9.03
4171	NYSE	NAT	Fri, Aug 22, 2014	9.03	9.11	8.95	9.01
4170	NYSE	NAT	Thu, Aug 21, 2014	9.15	9.16	9.01	9.12
4169	NYSE	NAT	Wed, Aug 20, 2014	9.09	9.18	8.92	9.13
4168	NYSE	NAT	Tue, Aug 19, 2014	9.08	9.15	9.04	9.12
4167	NYSE	NAT	Mon, Aug 18, 2014	8.97	9.13	8.92	9.07
4166	NYSE	NAT	Fri, Aug 15, 2014	9.00	9.04	8.76	8.90
4165	NYSE	NAT	Thu, Aug 14, 2014	8.78	9.02	8.76	8.96
4164	NYSE	NAT	Wed, Aug 13, 2014	8.62	8.80	8.58	8.76
4163	NYSE	NAT	Tue, Aug 12, 2014	8.90	9.00	8.52	8.59
4162	NYSE	NAT	Mon, Aug 11, 2014	8.70	9.10	8.68	8.92
4161	NYSE	NAT	Fri, Aug 8, 2014	8.58	8.66	8.50	8.64
4160	NYSE	NAT	Thu, Aug 7, 2014	8.71	8.77	8.56	8.60
4159	NYSE	NAT	Wed, Aug 6, 2014	8.59	8.79	8.55	8.71
4158	NYSE	NAT	Tue, Aug 5, 2014	8.63	8.69	8.52	8.60
4157	NYSE	NAT	Mon, Aug 4, 2014	8.57	8.69	8.50	8.67
4156	NYSE	NAT	Fri, Aug 1, 2014	8.55	8.61	8.41	8.57
4155	NYSE	NAT	Thu, Jul 31, 2014	8.62	8.62	8.47	8.53
4154	NYSE	NAT	Wed, Jul 30, 2014	8.77	8.80	8.60	8.68
4153	NYSE	NAT	Tue, Jul 29, 2014	8.67	8.87	8.58	8.72
4152	NYSE	NAT	Mon, Jul 28, 2014	8.74	8.74	8.49	8.64
4151	NYSE	NAT	Fri, Jul 25, 2014	8.81	8.88	8.66	8.74
4150	NYSE	NAT	Thu, Jul 24, 2014	8.93	9.02	8.83	8.88
4149	NYSE	NAT	Wed, Jul 23, 2014	9.05	9.06	8.78	8.88
4148	NYSE	NAT	Tue, Jul 22, 2014	9.39	9.43	9.24	9.29
4147	NYSE	NAT	Mon, Jul 21, 2014	9.25	9.36	9.15	9.35
4146	NYSE	NAT	Fri, Jul 18, 2014	8.93	9.27	8.93	9.22
4145	NYSE	NAT	Thu, Jul 17, 2014	9.15	9.15	8.90	8.94
4144	NYSE	NAT	Wed, Jul 16, 2014	9.15	9.31	8.98	9.16
4143	NYSE	NAT	Tue, Jul 15, 2014	8.98	9.07	8.85	8.98
4142	NYSE	NAT	Mon, Jul 14, 2014	8.73	9.01	8.72	8.98
4141	NYSE	NAT	Fri, Jul 11, 2014	8.57	8.73	8.48	8.63
4140	NYSE	NAT	Thu, Jul 10, 2014	8.49	8.70	8.43	8.53
4139	NYSE	NAT	Wed, Jul 9, 2014	8.81	8.96	8.45	8.52
4138	NYSE	NAT	Tue, Jul 8, 2014	9.02	9.02	8.82	9.00
4137	NYSE	NAT	Mon, Jul 7, 2014	9.15	9.20	8.95	9.01
4136	NYSE	NAT	Thu, Jul 3, 2014	9.22	9.23	9.05	9.14
4135	NYSE	NAT	Wed, Jul 2, 2014	9.30	9.36	9.16	9.16
4134	NYSE	NAT	Tue, Jul 1, 2014	9.47	9.57	9.22	9.30
4133	NYSE	NAT	Mon, Jun 30, 2014	9.49	9.50	9.37	9.45
4132	NYSE	NAT	Fri, Jun 27, 2014	9.42	9.52	9.36	9.48
4131	NYSE	NAT	Thu, Jun 26, 2014	9.58	9.62	9.33	9.47
4130	NYSE	NAT	Wed, Jun 25, 2014	9.22	9.61	9.22	9.56
4129	NYSE	NAT	Tue, Jun 24, 2014	9.55	9.76	9.20	9.21
4128	NYSE	NAT	Mon, Jun 23, 2014	9.38	9.69	9.34	9.54
4127	NYSE	NAT	Fri, Jun 20, 2014	8.96	9.40	8.96	9.35
4126	NYSE	NAT	Thu, Jun 19, 2014	8.97	9.03	8.86	8.91
4125	NYSE	NAT	Wed, Jun 18, 2014	8.94	9.12	8.93	8.95
4124	NYSE	NAT	Tue, Jun 17, 2014	8.76	8.99	8.72	8.94
4123	NYSE	NAT	Mon, Jun 16, 2014	8.81	8.90	8.75	8.79
4122	NYSE	NAT	Fri, Jun 13, 2014	8.74	8.87	8.70	8.81
4121	NYSE	NAT	Thu, Jun 12, 2014	8.52	8.70	8.46	8.67
4120	NYSE	NAT	Wed, Jun 11, 2014	8.52	8.57	8.38	8.47
4119	NYSE	NAT	Tue, Jun 10, 2014	8.45	8.62	8.45	8.53
4118	NYSE	NAT	Mon, Jun 9, 2014	8.57	8.64	8.45	8.49
4117	NYSE	NAT	Fri, Jun 6, 2014	8.48	8.55	8.45	8.52
4116	NYSE	NAT	Thu, Jun 5, 2014	8.37	8.53	8.20	8.43
4115	NYSE	NAT	Wed, Jun 4, 2014	8.13	8.38	8.04	8.30
4114	NYSE	NAT	Tue, Jun 3, 2014	8.25	8.29	8.04	8.14
4113	NYSE	NAT	Mon, Jun 2, 2014	8.22	8.32	8.10	8.26
4112	NYSE	NAT	Fri, May 30, 2014	8.31	8.32	8.06	8.11
4111	NYSE	NAT	Thu, May 29, 2014	8.34	8.44	8.28	8.34
4110	NYSE	NAT	Wed, May 28, 2014	8.40	8.43	8.31	8.35
4109	NYSE	NAT	Tue, May 27, 2014	8.35	8.41	8.26	8.39
4108	NYSE	NAT	Fri, May 23, 2014	8.25	8.33	8.21	8.28
4107	NYSE	NAT	Thu, May 22, 2014	8.25	8.29	8.18	8.21
4106	NYSE	NAT	Wed, May 21, 2014	8.29	8.33	8.18	8.25
4105	NYSE	NAT	Tue, May 20, 2014	8.43	8.43	8.18	8.24
4104	NYSE	NAT	Mon, May 19, 2014	8.26	8.51	8.21	8.43
4103	NYSE	NAT	Fri, May 16, 2014	8.39	8.48	8.22	8.23
4102	NYSE	NAT	Thu, May 15, 2014	8.45	8.51	8.30	8.39
4101	NYSE	NAT	Wed, May 14, 2014	8.88	8.88	8.44	8.45
4100	NYSE	NAT	Tue, May 13, 2014	8.38	8.91	8.37	8.87
4099	NYSE	NAT	Mon, May 12, 2014	8.36	8.58	8.29	8.57
4098	NYSE	NAT	Fri, May 9, 2014	7.99	8.16	7.94	8.14
4097	NYSE	NAT	Thu, May 8, 2014	8.37	8.43	7.96	7.97
4096	NYSE	NAT	Wed, May 7, 2014	8.42	8.44	8.30	8.36
4095	NYSE	NAT	Tue, May 6, 2014	8.43	8.56	8.37	8.37
4094	NYSE	NAT	Mon, May 5, 2014	8.46	8.46	8.37	8.45
4093	NYSE	NAT	Fri, May 2, 2014	8.45	8.67	8.45	8.49
4092	NYSE	NAT	Thu, May 1, 2014	8.51	8.60	8.41	8.45
4091	NYSE	NAT	Wed, Apr 30, 2014	8.42	8.59	8.34	8.55
4090	NYSE	NAT	Tue, Apr 29, 2014	8.31	8.53	8.31	8.46
4089	NYSE	NAT	Mon, Apr 28, 2014	8.49	8.52	8.26	8.31
4088	NYSE	NAT	Fri, Apr 25, 2014	8.59	8.67	8.41	8.44
4087	NYSE	NAT	Thu, Apr 24, 2014	8.67	8.71	8.53	8.59
4086	NYSE	NAT	Wed, Apr 23, 2014	8.72	8.76	8.58	8.60
4085	NYSE	NAT	Tue, Apr 22, 2014	8.84	8.84	8.67	8.75
4084	NYSE	NAT	Mon, Apr 21, 2014	8.67	8.84	8.66	8.79
4083	NYSE	NAT	Thu, Apr 17, 2014	8.50	8.64	8.49	8.59
4082	NYSE	NAT	Wed, Apr 16, 2014	8.41	8.57	8.38	8.54
4081	NYSE	NAT	Tue, Apr 15, 2014	8.39	8.47	8.21	8.31
4080	NYSE	NAT	Mon, Apr 14, 2014	8.48	8.54	8.31	8.37
4079	NYSE	NAT	Fri, Apr 11, 2014	8.42	8.56	8.33	8.39
4078	NYSE	NAT	Thu, Apr 10, 2014	8.58	8.60	8.43	8.43
4077	NYSE	NAT	Wed, Apr 9, 2014	8.46	8.62	8.45	8.53
4076	NYSE	NAT	Tue, Apr 8, 2014	8.44	8.50	8.34	8.43
4075	NYSE	NAT	Mon, Apr 7, 2014	9.67	9.71	9.35	9.38
4074	NYSE	NAT	Fri, Apr 4, 2014	9.76	9.95	9.63	9.72
4073	NYSE	NAT	Thu, Apr 3, 2014	9.94	9.94	9.67	9.69
4072	NYSE	NAT	Wed, Apr 2, 2014	9.83	9.98	9.77	9.87
4071	NYSE	NAT	Tue, Apr 1, 2014	9.79	9.84	9.58	9.74
4070	NYSE	NAT	Mon, Mar 31, 2014	10.01	10.01	9.64	9.75
4069	NYSE	NAT	Fri, Mar 28, 2014	9.81	10.14	9.81	9.96
4068	NYSE	NAT	Thu, Mar 27, 2014	9.80	9.97	9.74	9.79
4067	NYSE	NAT	Wed, Mar 26, 2014	10.26	10.27	9.79	9.81
4066	NYSE	NAT	Tue, Mar 25, 2014	9.90	10.37	9.90	10.18
4065	NYSE	NAT	Mon, Mar 24, 2014	10.03	10.06	9.71	9.86
4064	NYSE	NAT	Fri, Mar 21, 2014	10.05	10.22	10.00	10.02
4063	NYSE	NAT	Thu, Mar 20, 2014	10.00	10.08	9.89	9.98
4062	NYSE	NAT	Wed, Mar 19, 2014	10.17	10.28	10.01	10.04
4061	NYSE	NAT	Tue, Mar 18, 2014	10.01	10.32	10.00	10.20
4060	NYSE	NAT	Mon, Mar 17, 2014	9.97	10.10	9.95	9.98
4059	NYSE	NAT	Fri, Mar 14, 2014	9.83	10.03	9.81	9.92
4058	NYSE	NAT	Thu, Mar 13, 2014	10.04	10.16	9.74	9.87
4057	NYSE	NAT	Wed, Mar 12, 2014	10.12	10.12	9.92	10.04
4056	NYSE	NAT	Tue, Mar 11, 2014	10.12	10.53	10.04	10.20
4055	NYSE	NAT	Mon, Mar 10, 2014	10.21	10.25	10.04	10.14
4054	NYSE	NAT	Fri, Mar 7, 2014	10.54	10.56	10.24	10.27
4053	NYSE	NAT	Thu, Mar 6, 2014	10.70	10.76	10.28	10.52
4052	NYSE	NAT	Wed, Mar 5, 2014	10.59	10.76	10.53	10.67
4051	NYSE	NAT	Tue, Mar 4, 2014	10.50	10.82	10.47	10.61
4050	NYSE	NAT	Mon, Mar 3, 2014	10.38	10.59	10.19	10.36
4049	NYSE	NAT	Fri, Feb 28, 2014	10.27	10.86	10.26	10.48
4048	NYSE	NAT	Thu, Feb 27, 2014	10.16	10.35	10.04	10.28
4047	NYSE	NAT	Wed, Feb 26, 2014	10.08	10.31	9.82	10.13
4046	NYSE	NAT	Tue, Feb 25, 2014	10.10	10.18	9.96	10.09
4045	NYSE	NAT	Mon, Feb 24, 2014	10.14	10.39	10.11	10.11
4044	NYSE	NAT	Fri, Feb 21, 2014	9.77	10.14	9.77	10.08
4043	NYSE	NAT	Thu, Feb 20, 2014	9.53	9.77	9.51	9.75
4042	NYSE	NAT	Wed, Feb 19, 2014	9.76	9.80	9.50	9.50
4041	NYSE	NAT	Tue, Feb 18, 2014	9.91	10.01	9.77	9.81
4040	NYSE	NAT	Fri, Feb 14, 2014	10.03	10.06	9.85	10.00
4039	NYSE	NAT	Thu, Feb 13, 2014	9.83	10.06	9.77	10.03
4038	NYSE	NAT	Wed, Feb 12, 2014	9.83	10.05	9.72	9.89
4037	NYSE	NAT	Tue, Feb 11, 2014	9.63	10.04	9.52	9.84
4036	NYSE	NAT	Mon, Feb 10, 2014	10.12	10.31	9.57	9.60
4035	NYSE	NAT	Fri, Feb 7, 2014	10.29	10.51	10.12	10.15
4034	NYSE	NAT	Thu, Feb 6, 2014	9.94	10.36	9.94	10.27
4033	NYSE	NAT	Wed, Feb 5, 2014	10.06	10.08	9.72	9.94
4032	NYSE	NAT	Tue, Feb 4, 2014	10.16	10.31	9.93	10.03
4031	NYSE	NAT	Mon, Feb 3, 2014	10.81	10.83	10.01	10.15
4030	NYSE	NAT	Fri, Jan 31, 2014	10.62	10.95	10.56	10.84
4029	NYSE	NAT	Thu, Jan 30, 2014	10.92	11.14	10.84	10.87
4028	NYSE	NAT	Wed, Jan 29, 2014	10.99	11.11	10.81	10.93
4027	NYSE	NAT	Tue, Jan 28, 2014	10.96	11.35	10.94	11.14
4026	NYSE	NAT	Mon, Jan 27, 2014	10.95	11.15	10.60	10.93
4025	NYSE	NAT	Fri, Jan 24, 2014	11.29	11.31	10.56	10.97
4024	NYSE	NAT	Thu, Jan 23, 2014	11.69	11.89	11.30	11.33
4023	NYSE	NAT	Wed, Jan 22, 2014	12.43	12.48	11.68	11.88
4022	NYSE	NAT	Tue, Jan 21, 2014	11.35	12.50	11.33	12.43
4021	NYSE	NAT	Fri, Jan 17, 2014	10.96	11.55	10.92	11.19
4020	NYSE	NAT	Thu, Jan 16, 2014	10.32	11.14	10.32	11.01
4019	NYSE	NAT	Wed, Jan 15, 2014	9.89	10.10	9.72	9.94
4018	NYSE	NAT	Tue, Jan 14, 2014	9.69	9.85	9.58	9.74
4017	NYSE	NAT	Mon, Jan 13, 2014	9.77	9.91	9.54	9.64
4016	NYSE	NAT	Fri, Jan 10, 2014	9.65	9.79	9.29	9.77
4015	NYSE	NAT	Thu, Jan 9, 2014	9.80	10.12	9.19	9.50
4014	NYSE	NAT	Wed, Jan 8, 2014	10.21	10.29	10.08	10.20
4013	NYSE	NAT	Tue, Jan 7, 2014	10.12	10.31	9.87	10.19
4012	NYSE	NAT	Mon, Jan 6, 2014	9.58	10.07	9.47	10.05
4011	NYSE	NAT	Fri, Jan 3, 2014	9.49	9.58	9.34	9.51
4010	NYSE	NAT	Thu, Jan 2, 2014	9.55	9.63	9.27	9.51
4009	NYSE	NAT	Tue, Dec 31, 2013	9.46	9.76	9.46	9.61
4008	NYSE	NAT	Mon, Dec 30, 2013	9.56	9.78	9.37	9.46
4007	NYSE	NAT	Fri, Dec 27, 2013	9.71	9.76	9.24	9.60
4006	NYSE	NAT	Thu, Dec 26, 2013	9.60	9.85	9.56	9.61
4005	NYSE	NAT	Tue, Dec 24, 2013	9.66	9.79	9.54	9.59
4004	NYSE	NAT	Mon, Dec 23, 2013	9.16	9.74	9.08	9.63
4003	NYSE	NAT	Fri, Dec 20, 2013	8.54	9.12	8.54	8.98
4002	NYSE	NAT	Thu, Dec 19, 2013	7.99	8.53	7.99	8.52
4001	NYSE	NAT	Wed, Dec 18, 2013	8.09	8.16	7.89	8.06
4000	NYSE	NAT	Tue, Dec 17, 2013	8.13	8.20	8.07	8.09
3999	NYSE	NAT	Mon, Dec 16, 2013	8.23	8.39	8.08	8.17
3998	NYSE	NAT	Fri, Dec 13, 2013	8.01	8.26	8.00	8.20
3997	NYSE	NAT	Thu, Dec 12, 2013	7.81	8.11	7.80	8.02
3996	NYSE	NAT	Wed, Dec 11, 2013	7.93	7.96	7.75	7.81
3995	NYSE	NAT	Tue, Dec 10, 2013	7.86	7.96	7.78	7.87
3994	NYSE	NAT	Mon, Dec 9, 2013	7.95	8.00	7.71	7.81
3993	NYSE	NAT	Fri, Dec 6, 2013	8.38	8.43	7.93	7.95
3992	NYSE	NAT	Thu, Dec 5, 2013	8.29	8.47	8.29	8.36
3991	NYSE	NAT	Wed, Dec 4, 2013	8.00	8.38	7.97	8.30
3990	NYSE	NAT	Tue, Dec 3, 2013	7.93	8.14	7.86	7.98
3989	NYSE	NAT	Mon, Dec 2, 2013	8.08	8.11	7.83	7.97
3988	NYSE	NAT	Fri, Nov 29, 2013	7.99	8.25	7.85	8.03
3987	NYSE	NAT	Wed, Nov 27, 2013	7.73	7.80	7.58	7.68
3986	NYSE	NAT	Tue, Nov 26, 2013	7.73	7.81	7.52	7.69
3985	NYSE	NAT	Mon, Nov 25, 2013	7.93	8.00	7.89	7.89
3984	NYSE	NAT	Fri, Nov 22, 2013	7.83	8.00	7.83	7.93
3983	NYSE	NAT	Thu, Nov 21, 2013	8.57	8.86	8.56	8.80
3982	NYSE	NAT	Wed, Nov 20, 2013	8.55	8.68	8.43	8.56
3981	NYSE	NAT	Tue, Nov 19, 2013	8.56	8.80	8.49	8.57
3980	NYSE	NAT	Mon, Nov 18, 2013	8.85	8.95	8.53	8.59
3979	NYSE	NAT	Fri, Nov 15, 2013	8.73	8.93	8.67	8.86
3978	NYSE	NAT	Thu, Nov 14, 2013	8.79	8.86	8.60	8.77
3977	NYSE	NAT	Wed, Nov 13, 2013	8.64	8.87	8.62	8.79
3976	NYSE	NAT	Tue, Nov 12, 2013	8.97	9.08	8.54	8.66
3975	NYSE	NAT	Mon, Nov 11, 2013	8.36	9.01	8.34	8.97
3974	NYSE	NAT	Fri, Nov 8, 2013	8.13	8.50	8.13	8.36
3973	NYSE	NAT	Thu, Nov 7, 2013	8.34	8.37	8.12	8.12
3972	NYSE	NAT	Wed, Nov 6, 2013	8.57	8.60	8.23	8.32
3971	NYSE	NAT	Tue, Nov 5, 2013	8.38	8.70	8.38	8.55
3970	NYSE	NAT	Mon, Nov 4, 2013	8.43	8.45	8.16	8.43
3969	NYSE	NAT	Fri, Nov 1, 2013	8.11	8.43	8.03	8.37
3968	NYSE	NAT	Thu, Oct 31, 2013	8.23	8.28	7.98	8.09
3967	NYSE	NAT	Wed, Oct 30, 2013	8.37	8.37	8.18	8.26
3966	NYSE	NAT	Tue, Oct 29, 2013	8.30	8.40	8.15	8.39
3965	NYSE	NAT	Mon, Oct 28, 2013	8.47	8.56	8.20	8.25
3964	NYSE	NAT	Fri, Oct 25, 2013	8.37	8.52	8.31	8.50
3963	NYSE	NAT	Thu, Oct 24, 2013	8.38	8.45	8.28	8.32
3962	NYSE	NAT	Wed, Oct 23, 2013	8.52	8.56	8.38	8.39
3961	NYSE	NAT	Tue, Oct 22, 2013	8.43	8.57	8.43	8.57
3960	NYSE	NAT	Mon, Oct 21, 2013	8.49	8.57	8.35	8.41
3959	NYSE	NAT	Fri, Oct 18, 2013	8.43	8.56	8.31	8.51
3958	NYSE	NAT	Thu, Oct 17, 2013	8.35	8.53	8.29	8.36
3957	NYSE	NAT	Wed, Oct 16, 2013	8.26	8.38	8.16	8.34
3956	NYSE	NAT	Tue, Oct 15, 2013	8.16	8.39	8.16	8.26
3955	NYSE	NAT	Mon, Oct 14, 2013	8.02	8.23	8.02	8.20
3954	NYSE	NAT	Fri, Oct 11, 2013	8.01	8.14	7.97	8.11
3953	NYSE	NAT	Thu, Oct 10, 2013	7.88	8.15	7.88	8.00
3952	NYSE	NAT	Wed, Oct 9, 2013	7.87	7.93	7.78	7.80
3951	NYSE	NAT	Tue, Oct 8, 2013	8.03	8.06	7.84	7.87
3950	NYSE	NAT	Mon, Oct 7, 2013	7.93	8.07	7.93	7.99
3949	NYSE	NAT	Fri, Oct 4, 2013	8.02	8.11	7.93	8.00
3948	NYSE	NAT	Thu, Oct 3, 2013	8.07	8.09	7.93	8.04
3947	NYSE	NAT	Wed, Oct 2, 2013	8.16	8.16	8.04	8.11
3946	NYSE	NAT	Tue, Oct 1, 2013	8.14	8.27	8.09	8.21
3945	NYSE	NAT	Mon, Sep 30, 2013	8.18	8.30	8.05	8.17
3944	NYSE	NAT	Fri, Sep 27, 2013	8.60	8.60	8.25	8.36
3943	NYSE	NAT	Thu, Sep 26, 2013	8.92	9.01	8.56	8.69
3942	NYSE	NAT	Wed, Sep 25, 2013	8.03	8.92	8.03	8.84
3941	NYSE	NAT	Tue, Sep 24, 2013	8.08	8.17	7.94	7.99
3940	NYSE	NAT	Mon, Sep 23, 2013	7.99	8.31	7.94	8.11
3939	NYSE	NAT	Fri, Sep 20, 2013	8.40	8.53	7.93	8.02
3938	NYSE	NAT	Thu, Sep 19, 2013	8.04	8.40	8.04	8.35
3937	NYSE	NAT	Wed, Sep 18, 2013	8.02	8.15	7.88	8.06
3936	NYSE	NAT	Tue, Sep 17, 2013	7.98	8.07	7.97	8.03
3935	NYSE	NAT	Mon, Sep 16, 2013	7.99	8.07	7.91	8.00
3934	NYSE	NAT	Fri, Sep 13, 2013	7.99	8.13	7.89	7.91
3933	NYSE	NAT	Thu, Sep 12, 2013	8.20	8.27	7.98	8.00
3932	NYSE	NAT	Wed, Sep 11, 2013	8.16	8.37	8.16	8.22
3931	NYSE	NAT	Tue, Sep 10, 2013	8.33	8.33	8.04	8.19
3930	NYSE	NAT	Mon, Sep 9, 2013	8.04	8.47	8.04	8.25
3929	NYSE	NAT	Fri, Sep 6, 2013	8.03	8.18	7.93	8.02
3928	NYSE	NAT	Thu, Sep 5, 2013	7.73	8.06	7.73	7.89
3927	NYSE	NAT	Wed, Sep 4, 2013	7.67	7.99	7.66	7.73
3926	NYSE	NAT	Tue, Sep 3, 2013	7.67	7.73	7.61	7.68
3925	NYSE	NAT	Fri, Aug 30, 2013	7.68	7.78	7.58	7.62
3924	NYSE	NAT	Thu, Aug 29, 2013	7.84	7.88	7.69	7.73
3923	NYSE	NAT	Wed, Aug 28, 2013	7.80	8.12	7.78	7.85
3922	NYSE	NAT	Tue, Aug 27, 2013	7.74	8.17	7.70	7.73
3921	NYSE	NAT	Mon, Aug 26, 2013	8.27	8.28	7.85	7.88
3920	NYSE	NAT	Fri, Aug 23, 2013	8.40	8.41	8.08	8.23
3919	NYSE	NAT	Thu, Aug 22, 2013	7.95	8.38	7.94	8.35
3918	NYSE	NAT	Wed, Aug 21, 2013	7.70	8.22	7.66	7.92
3917	NYSE	NAT	Tue, Aug 20, 2013	8.02	8.04	7.71	7.72
3916	NYSE	NAT	Mon, Aug 19, 2013	8.27	8.39	7.98	8.03
3915	NYSE	NAT	Fri, Aug 16, 2013	8.63	8.68	8.18	8.32
3914	NYSE	NAT	Thu, Aug 15, 2013	8.64	8.81	8.53	8.69
3913	NYSE	NAT	Wed, Aug 14, 2013	8.85	8.90	8.57	8.73
3912	NYSE	NAT	Tue, Aug 13, 2013	9.19	9.32	8.64	8.86
3911	NYSE	NAT	Mon, Aug 12, 2013	9.32	9.80	9.12	9.63
3910	NYSE	NAT	Fri, Aug 9, 2013	9.00	9.45	8.98	9.42
3909	NYSE	NAT	Thu, Aug 8, 2013	9.10	9.20	9.00	9.03
3908	NYSE	NAT	Wed, Aug 7, 2013	8.97	9.04	8.82	9.01
3907	NYSE	NAT	Tue, Aug 6, 2013	9.31	9.37	8.93	9.02
3906	NYSE	NAT	Mon, Aug 5, 2013	9.30	9.41	9.28	9.33
3905	NYSE	NAT	Fri, Aug 2, 2013	9.47	9.52	9.22	9.31
3904	NYSE	NAT	Thu, Aug 1, 2013	9.47	9.66	9.46	9.48
3903	NYSE	NAT	Wed, Jul 31, 2013	9.48	9.60	9.27	9.40
3902	NYSE	NAT	Tue, Jul 30, 2013	9.91	9.94	9.47	9.53
3901	NYSE	NAT	Mon, Jul 29, 2013	10.07	10.07	9.86	9.96
3900	NYSE	NAT	Fri, Jul 26, 2013	10.14	10.38	9.98	10.07
3899	NYSE	NAT	Thu, Jul 25, 2013	10.12	10.17	9.91	10.16
3898	NYSE	NAT	Wed, Jul 24, 2013	10.01	10.15	9.89	10.15
3897	NYSE	NAT	Tue, Jul 23, 2013	9.89	10.16	9.62	9.90
3896	NYSE	NAT	Mon, Jul 22, 2013	8.78	9.14	8.78	9.10
3895	NYSE	NAT	Fri, Jul 19, 2013	8.51	8.89	8.51	8.77
3894	NYSE	NAT	Thu, Jul 18, 2013	8.45	8.56	8.44	8.50
3893	NYSE	NAT	Wed, Jul 17, 2013	8.49	8.58	8.41	8.44
3892	NYSE	NAT	Tue, Jul 16, 2013	8.35	8.54	8.34	8.42
3891	NYSE	NAT	Mon, Jul 15, 2013	8.25	8.37	8.18	8.34
3890	NYSE	NAT	Fri, Jul 12, 2013	8.17	8.37	8.17	8.25
3889	NYSE	NAT	Thu, Jul 11, 2013	8.11	8.20	8.03	8.18
3888	NYSE	NAT	Wed, Jul 10, 2013	8.00	8.09	7.91	8.07
3887	NYSE	NAT	Tue, Jul 9, 2013	7.78	8.00	7.73	7.96
3886	NYSE	NAT	Mon, Jul 8, 2013	7.57	7.75	7.52	7.74
3885	NYSE	NAT	Fri, Jul 5, 2013	7.64	7.64	7.43	7.56
3884	NYSE	NAT	Wed, Jul 3, 2013	7.47	7.53	7.32	7.46
3883	NYSE	NAT	Tue, Jul 2, 2013	7.48	7.60	7.43	7.47
3882	NYSE	NAT	Mon, Jul 1, 2013	7.52	7.68	7.43	7.49
3881	NYSE	NAT	Fri, Jun 28, 2013	7.09	7.53	7.06	7.50
3880	NYSE	NAT	Thu, Jun 27, 2013	7.15	7.27	6.94	7.10
3879	NYSE	NAT	Wed, Jun 26, 2013	7.33	7.42	7.09	7.12
3878	NYSE	NAT	Tue, Jun 25, 2013	7.43	7.58	7.25	7.30
3877	NYSE	NAT	Mon, Jun 24, 2013	7.81	7.81	7.24	7.33
3876	NYSE	NAT	Fri, Jun 21, 2013	7.90	7.97	7.82	7.84
3875	NYSE	NAT	Thu, Jun 20, 2013	8.07	8.07	7.78	7.82
3874	NYSE	NAT	Wed, Jun 19, 2013	8.16	8.21	8.08	8.08
3873	NYSE	NAT	Tue, Jun 18, 2013	8.23	8.28	8.10	8.19
3872	NYSE	NAT	Mon, Jun 17, 2013	8.18	8.37	8.13	8.25
3871	NYSE	NAT	Fri, Jun 14, 2013	8.24	8.29	8.11	8.12
3870	NYSE	NAT	Thu, Jun 13, 2013	8.15	8.31	8.10	8.25
3869	NYSE	NAT	Wed, Jun 12, 2013	8.21	8.38	8.11	8.12
3868	NYSE	NAT	Tue, Jun 11, 2013	8.32	8.32	8.14	8.17
3867	NYSE	NAT	Mon, Jun 10, 2013	8.31	8.43	8.28	8.38
3866	NYSE	NAT	Fri, Jun 7, 2013	8.33	8.38	8.26	8.29
3865	NYSE	NAT	Thu, Jun 6, 2013	8.23	8.37	8.23	8.30
3864	NYSE	NAT	Wed, Jun 5, 2013	8.24	8.33	8.23	8.26
3863	NYSE	NAT	Tue, Jun 4, 2013	8.35	8.38	8.24	8.27
3862	NYSE	NAT	Mon, Jun 3, 2013	8.31	8.42	8.21	8.36
3861	NYSE	NAT	Fri, May 31, 2013	8.45	8.50	8.23	8.31
3860	NYSE	NAT	Thu, May 30, 2013	8.70	8.70	8.46	8.51
3859	NYSE	NAT	Wed, May 29, 2013	8.62	8.79	8.54	8.72
3858	NYSE	NAT	Tue, May 28, 2013	8.85	8.85	8.62	8.68
3857	NYSE	NAT	Fri, May 24, 2013	8.75	8.90	8.70	8.75
3856	NYSE	NAT	Thu, May 23, 2013	8.69	8.80	8.62	8.77
3855	NYSE	NAT	Wed, May 22, 2013	9.19	9.26	8.72	8.81
3854	NYSE	NAT	Tue, May 21, 2013	8.88	9.26	8.83	9.17
3853	NYSE	NAT	Mon, May 20, 2013	8.85	8.99	8.77	8.83
3852	NYSE	NAT	Fri, May 17, 2013	8.66	8.85	8.61	8.85
3851	NYSE	NAT	Thu, May 16, 2013	8.80	8.83	8.54	8.68
3850	NYSE	NAT	Wed, May 15, 2013	8.54	9.02	8.52	8.83
3849	NYSE	NAT	Tue, May 14, 2013	8.62	8.80	8.54	8.59
3848	NYSE	NAT	Mon, May 13, 2013	8.54	8.78	8.45	8.57
3847	NYSE	NAT	Fri, May 10, 2013	8.47	8.67	8.45	8.54
3846	NYSE	NAT	Thu, May 9, 2013	8.59	8.61	8.43	8.49
3845	NYSE	NAT	Wed, May 8, 2013	8.55	8.65	8.52	8.58
3844	NYSE	NAT	Tue, May 7, 2013	8.64	8.67	8.52	8.55
3843	NYSE	NAT	Mon, May 6, 2013	8.59	8.76	8.54	8.63
3842	NYSE	NAT	Fri, May 3, 2013	8.73	8.79	8.57	8.58
3841	NYSE	NAT	Thu, May 2, 2013	8.54	8.87	8.54	8.65
3840	NYSE	NAT	Wed, May 1, 2013	8.79	8.85	8.51	8.52
3839	NYSE	NAT	Tue, Apr 30, 2013	8.93	8.99	8.77	8.83
3838	NYSE	NAT	Mon, Apr 29, 2013	8.94	9.08	8.91	8.98
3837	NYSE	NAT	Fri, Apr 26, 2013	9.04	9.05	8.78	8.94
3836	NYSE	NAT	Thu, Apr 25, 2013	9.07	9.32	9.07	9.15
3835	NYSE	NAT	Wed, Apr 24, 2013	8.97	9.10	8.96	9.06
3834	NYSE	NAT	Tue, Apr 23, 2013	8.98	9.07	8.93	9.01
3833	NYSE	NAT	Mon, Apr 22, 2013	9.09	9.16	8.95	8.99
3832	NYSE	NAT	Fri, Apr 19, 2013	9.05	9.17	8.89	9.06
3831	NYSE	NAT	Thu, Apr 18, 2013	9.03	9.12	8.87	9.02
3830	NYSE	NAT	Wed, Apr 17, 2013	9.09	9.10	8.82	9.02
3829	NYSE	NAT	Tue, Apr 16, 2013	9.23	9.41	9.05	9.16
3828	NYSE	NAT	Mon, Apr 15, 2013	9.59	9.64	9.02	9.03
3827	NYSE	NAT	Fri, Apr 12, 2013	9.60	9.74	9.52	9.64
3826	NYSE	NAT	Thu, Apr 11, 2013	9.78	9.81	9.58	9.67
3825	NYSE	NAT	Wed, Apr 10, 2013	9.81	9.89	9.67	9.75
3824	NYSE	NAT	Tue, Apr 9, 2013	9.61	9.81	9.54	9.79
3823	NYSE	NAT	Mon, Apr 8, 2013	9.62	9.71	9.56	9.60
3822	NYSE	NAT	Fri, Apr 5, 2013	9.55	9.70	9.52	9.62
3821	NYSE	NAT	Thu, Apr 4, 2013	9.60	9.66	9.52	9.60
3820	NYSE	NAT	Wed, Apr 3, 2013	9.76	9.76	9.52	9.58
3819	NYSE	NAT	Tue, Apr 2, 2013	9.66	9.88	9.61	9.75
3818	NYSE	NAT	Mon, Apr 1, 2013	11.40	11.45	10.69	10.92
3817	NYSE	NAT	Thu, Mar 28, 2013	11.65	11.73	11.40	11.45
3816	NYSE	NAT	Wed, Mar 27, 2013	11.26	11.67	11.17	11.61
3815	NYSE	NAT	Tue, Mar 26, 2013	11.70	11.89	11.00	11.16
3814	NYSE	NAT	Mon, Mar 25, 2013	11.35	11.84	11.07	11.66
3813	NYSE	NAT	Fri, Mar 22, 2013	10.63	11.50	10.58	11.05
3812	NYSE	NAT	Thu, Mar 21, 2013	10.16	10.65	9.91	10.55
3811	NYSE	NAT	Wed, Mar 20, 2013	10.00	10.24	9.86	10.15
3810	NYSE	NAT	Tue, Mar 19, 2013	9.90	10.19	9.83	9.89
3809	NYSE	NAT	Mon, Mar 18, 2013	9.51	9.89	9.48	9.71
3808	NYSE	NAT	Fri, Mar 15, 2013	9.27	9.47	9.24	9.35
3807	NYSE	NAT	Thu, Mar 14, 2013	9.03	9.27	9.03	9.25
3806	NYSE	NAT	Wed, Mar 13, 2013	8.89	9.04	8.87	9.03
3805	NYSE	NAT	Tue, Mar 12, 2013	8.95	8.98	8.85	8.90
3804	NYSE	NAT	Mon, Mar 11, 2013	9.02	9.04	8.92	8.97
3803	NYSE	NAT	Fri, Mar 8, 2013	8.90	9.12	8.86	9.02
3802	NYSE	NAT	Thu, Mar 7, 2013	8.84	8.87	8.80	8.82
3801	NYSE	NAT	Wed, Mar 6, 2013	8.82	8.92	8.80	8.85
3800	NYSE	NAT	Tue, Mar 5, 2013	8.72	8.87	8.70	8.80
3799	NYSE	NAT	Mon, Mar 4, 2013	8.83	8.87	8.66	8.70
3798	NYSE	NAT	Fri, Mar 1, 2013	8.82	8.92	8.77	8.82
3797	NYSE	NAT	Thu, Feb 28, 2013	9.02	9.02	8.83	8.86
3796	NYSE	NAT	Wed, Feb 27, 2013	8.90	9.09	8.84	9.02
3795	NYSE	NAT	Tue, Feb 26, 2013	9.24	9.28	8.82	8.90
3794	NYSE	NAT	Mon, Feb 25, 2013	8.92	9.23	8.90	9.17
3793	NYSE	NAT	Fri, Feb 22, 2013	8.85	8.92	8.72	8.90
3792	NYSE	NAT	Thu, Feb 21, 2013	8.69	8.87	8.62	8.76
3791	NYSE	NAT	Wed, Feb 20, 2013	8.74	8.83	8.58	8.61
3790	NYSE	NAT	Tue, Feb 19, 2013	8.69	8.82	8.64	8.73
3789	NYSE	NAT	Fri, Feb 15, 2013	8.90	8.90	8.67	8.69
3788	NYSE	NAT	Thu, Feb 14, 2013	8.78	8.85	8.68	8.74
3787	NYSE	NAT	Wed, Feb 13, 2013	8.92	9.08	8.75	8.79
3786	NYSE	NAT	Tue, Feb 12, 2013	8.73	8.92	8.72	8.87
3785	NYSE	NAT	Mon, Feb 11, 2013	8.72	8.74	8.64	8.74
3784	NYSE	NAT	Fri, Feb 8, 2013	8.67	8.76	8.63	8.68
3783	NYSE	NAT	Thu, Feb 7, 2013	8.78	8.79	8.59	8.68
3782	NYSE	NAT	Wed, Feb 6, 2013	8.65	8.78	8.64	8.74
3781	NYSE	NAT	Tue, Feb 5, 2013	8.65	8.68	8.58	8.65
3780	NYSE	NAT	Mon, Feb 4, 2013	8.71	8.71	8.58	8.63
3779	NYSE	NAT	Fri, Feb 1, 2013	8.62	8.67	8.58	8.65
3778	NYSE	NAT	Thu, Jan 31, 2013	8.78	8.79	8.50	8.56
3777	NYSE	NAT	Wed, Jan 30, 2013	9.02	9.06	8.74	8.81
3776	NYSE	NAT	Tue, Jan 29, 2013	9.07	9.08	8.90	9.03
3775	NYSE	NAT	Mon, Jan 28, 2013	8.84	9.12	8.84	9.10
3774	NYSE	NAT	Fri, Jan 25, 2013	8.88	9.09	8.82	8.93
3773	NYSE	NAT	Thu, Jan 24, 2013	8.79	8.90	8.74	8.84
3772	NYSE	NAT	Wed, Jan 23, 2013	8.84	8.92	8.76	8.80
3771	NYSE	NAT	Tue, Jan 22, 2013	8.55	8.84	8.54	8.83
3770	NYSE	NAT	Fri, Jan 18, 2013	8.55	8.56	8.44	8.53
3769	NYSE	NAT	Thu, Jan 17, 2013	8.57	8.97	8.45	8.53
3768	NYSE	NAT	Wed, Jan 16, 2013	8.86	9.36	8.78	8.80
3767	NYSE	NAT	Tue, Jan 15, 2013	8.94	9.03	8.82	8.84
3766	NYSE	NAT	Mon, Jan 14, 2013	9.07	9.15	8.92	8.97
3765	NYSE	NAT	Fri, Jan 11, 2013	9.48	9.53	9.05	9.07
3764	NYSE	NAT	Thu, Jan 10, 2013	9.24	9.46	9.22	9.42
3763	NYSE	NAT	Wed, Jan 9, 2013	9.29	9.31	9.02	9.13
3762	NYSE	NAT	Tue, Jan 8, 2013	9.02	9.30	9.02	9.24
3761	NYSE	NAT	Mon, Jan 7, 2013	9.17	9.20	8.93	9.04
3760	NYSE	NAT	Fri, Jan 4, 2013	8.69	9.14	8.65	9.07
3759	NYSE	NAT	Thu, Jan 3, 2013	8.73	8.78	8.54	8.63
3758	NYSE	NAT	Wed, Jan 2, 2013	8.89	8.89	8.63	8.72
3757	NYSE	NAT	Mon, Dec 31, 2012	8.22	8.70	8.20	8.67
3756	NYSE	NAT	Fri, Dec 28, 2012	8.32	8.45	8.23	8.25
3755	NYSE	NAT	Thu, Dec 27, 2012	8.38	8.51	8.31	8.39
3754	NYSE	NAT	Wed, Dec 26, 2012	8.43	8.45	8.28	8.36
3753	NYSE	NAT	Mon, Dec 24, 2012	8.40	8.47	8.33	8.41
3752	NYSE	NAT	Fri, Dec 21, 2012	8.64	8.67	8.42	8.47
3751	NYSE	NAT	Thu, Dec 20, 2012	8.87	8.88	8.70	8.76
3750	NYSE	NAT	Wed, Dec 19, 2012	9.02	9.02	8.83	8.88
3749	NYSE	NAT	Tue, Dec 18, 2012	8.72	9.01	8.67	9.00
3748	NYSE	NAT	Mon, Dec 17, 2012	8.45	8.72	8.45	8.71
3747	NYSE	NAT	Fri, Dec 14, 2012	8.37	8.48	8.31	8.45
3746	NYSE	NAT	Thu, Dec 13, 2012	8.11	8.52	8.08	8.35
3745	NYSE	NAT	Wed, Dec 12, 2012	8.32	8.37	8.10	8.12
3744	NYSE	NAT	Tue, Dec 11, 2012	8.33	8.46	8.21	8.28
3743	NYSE	NAT	Mon, Dec 10, 2012	8.37	8.43	8.24	8.33
3742	NYSE	NAT	Fri, Dec 7, 2012	8.30	8.42	8.28	8.37
3741	NYSE	NAT	Thu, Dec 6, 2012	8.45	8.47	8.11	8.28
3740	NYSE	NAT	Wed, Dec 5, 2012	8.87	8.88	8.46	8.48
3739	NYSE	NAT	Tue, Dec 4, 2012	8.92	9.01	8.80	8.86
3738	NYSE	NAT	Mon, Dec 3, 2012	9.02	9.05	8.86	8.96
3737	NYSE	NAT	Fri, Nov 30, 2012	9.05	9.07	8.94	9.01
3736	NYSE	NAT	Thu, Nov 29, 2012	9.09	9.17	8.95	9.02
3735	NYSE	NAT	Wed, Nov 28, 2012	9.17	9.21	8.92	9.05
3734	NYSE	NAT	Tue, Nov 27, 2012	9.39	9.39	9.10	9.21
3733	NYSE	NAT	Mon, Nov 26, 2012	9.67	9.67	9.36	9.49
3732	NYSE	NAT	Fri, Nov 23, 2012	9.19	9.47	9.17	9.47
3731	NYSE	NAT	Wed, Nov 21, 2012	8.96	9.10	8.87	9.06
3730	NYSE	NAT	Tue, Nov 20, 2012	9.01	9.12	8.87	8.97
3729	NYSE	NAT	Mon, Nov 19, 2012	8.79	9.02	8.79	9.01
3728	NYSE	NAT	Fri, Nov 16, 2012	8.52	8.77	8.52	8.65
3727	NYSE	NAT	Thu, Nov 15, 2012	8.19	8.75	8.18	8.49
3726	NYSE	NAT	Wed, Nov 14, 2012	8.24	8.28	8.13	8.18
3725	NYSE	NAT	Tue, Nov 13, 2012	8.47	8.48	8.23	8.25
3724	NYSE	NAT	Mon, Nov 12, 2012	8.48	8.61	8.43	8.43
3723	NYSE	NAT	Fri, Nov 9, 2012	8.57	8.61	8.46	8.48
3722	NYSE	NAT	Thu, Nov 8, 2012	8.56	8.75	8.51	8.61
3721	NYSE	NAT	Wed, Nov 7, 2012	8.72	8.74	8.43	8.59
3720	NYSE	NAT	Tue, Nov 6, 2012	8.66	8.88	8.65	8.79
3719	NYSE	NAT	Mon, Nov 5, 2012	8.45	8.73	8.44	8.64
3718	NYSE	NAT	Fri, Nov 2, 2012	8.48	8.51	8.37	8.46
3717	NYSE	NAT	Thu, Nov 1, 2012	8.33	8.54	8.31	8.42
3716	NYSE	NAT	Wed, Oct 31, 2012	8.22	8.69	8.22	8.33
3715	NYSE	NAT	Fri, Oct 26, 2012	8.31	8.39	8.21	8.22
3714	NYSE	NAT	Thu, Oct 25, 2012	8.54	8.56	8.25	8.31
3713	NYSE	NAT	Wed, Oct 24, 2012	8.43	8.59	8.29	8.48
3712	NYSE	NAT	Tue, Oct 23, 2012	8.48	8.55	8.36	8.39
3711	NYSE	NAT	Mon, Oct 22, 2012	8.65	8.79	8.43	8.55
3710	NYSE	NAT	Fri, Oct 19, 2012	8.97	8.99	8.82	8.87
3709	NYSE	NAT	Thu, Oct 18, 2012	8.96	9.18	8.96	8.99
3708	NYSE	NAT	Wed, Oct 17, 2012	8.94	8.97	8.86	8.96
3707	NYSE	NAT	Tue, Oct 16, 2012	9.15	9.17	8.85	8.94
3706	NYSE	NAT	Mon, Oct 15, 2012	9.26	9.30	9.07	9.12
3705	NYSE	NAT	Fri, Oct 12, 2012	9.37	9.46	9.19	9.23
3704	NYSE	NAT	Thu, Oct 11, 2012	9.28	9.37	9.22	9.25
3703	NYSE	NAT	Wed, Oct 10, 2012	9.35	9.49	9.07	9.20
3702	NYSE	NAT	Tue, Oct 9, 2012	9.55	9.55	9.25	9.27
3701	NYSE	NAT	Mon, Oct 8, 2012	9.66	9.74	9.45	9.48
3700	NYSE	NAT	Fri, Oct 5, 2012	10.04	10.04	9.66	9.70
3699	NYSE	NAT	Thu, Oct 4, 2012	9.97	9.97	9.82	9.97
3698	NYSE	NAT	Wed, Oct 3, 2012	10.08	10.08	9.86	9.88
3697	NYSE	NAT	Tue, Oct 2, 2012	10.00	10.06	9.89	10.02
3696	NYSE	NAT	Mon, Oct 1, 2012	10.10	10.13	9.84	9.89
3695	NYSE	NAT	Fri, Sep 28, 2012	10.09	10.14	9.99	9.99
3694	NYSE	NAT	Thu, Sep 27, 2012	10.16	10.24	10.07	10.16
3693	NYSE	NAT	Wed, Sep 26, 2012	10.08	10.26	9.94	10.09
3692	NYSE	NAT	Tue, Sep 25, 2012	10.46	10.55	10.05	10.08
3691	NYSE	NAT	Mon, Sep 24, 2012	10.42	10.59	10.36	10.45
3690	NYSE	NAT	Fri, Sep 21, 2012	10.52	10.63	10.43	10.43
3689	NYSE	NAT	Thu, Sep 20, 2012	10.50	10.59	10.42	10.50
3688	NYSE	NAT	Wed, Sep 19, 2012	10.23	10.59	10.23	10.53
3687	NYSE	NAT	Tue, Sep 18, 2012	10.46	10.46	10.14	10.22
3686	NYSE	NAT	Mon, Sep 17, 2012	10.77	10.80	10.33	10.39
3685	NYSE	NAT	Fri, Sep 14, 2012	11.17	11.26	10.77	10.81
3684	NYSE	NAT	Thu, Sep 13, 2012	10.77	11.25	10.56	11.10
3683	NYSE	NAT	Wed, Sep 12, 2012	11.04	11.14	10.98	11.10
3682	NYSE	NAT	Tue, Sep 11, 2012	11.00	11.10	10.88	11.04
3681	NYSE	NAT	Mon, Sep 10, 2012	11.07	11.10	10.82	10.93
3680	NYSE	NAT	Fri, Sep 7, 2012	11.25	11.25	11.04	11.07
3679	NYSE	NAT	Thu, Sep 6, 2012	11.28	11.37	11.20	11.23
3678	NYSE	NAT	Wed, Sep 5, 2012	11.32	11.37	11.14	11.21
3677	NYSE	NAT	Tue, Sep 4, 2012	11.66	11.66	11.20	11.27
3676	NYSE	NAT	Fri, Aug 31, 2012	11.32	11.71	11.28	11.61
3675	NYSE	NAT	Thu, Aug 30, 2012	11.41	11.49	11.23	11.25
3674	NYSE	NAT	Wed, Aug 29, 2012	11.50	11.57	11.40	11.43
3673	NYSE	NAT	Tue, Aug 28, 2012	11.47	11.59	11.42	11.50
3672	NYSE	NAT	Mon, Aug 27, 2012	11.71	11.89	11.51	11.52
3671	NYSE	NAT	Fri, Aug 24, 2012	11.67	11.77	11.57	11.68
3670	NYSE	NAT	Thu, Aug 23, 2012	11.91	11.99	11.70	11.71
3669	NYSE	NAT	Wed, Aug 22, 2012	12.08	12.15	11.86	11.94
3668	NYSE	NAT	Tue, Aug 21, 2012	12.16	12.39	12.09	12.11
3667	NYSE	NAT	Mon, Aug 20, 2012	12.38	12.39	12.06	12.13
3666	NYSE	NAT	Fri, Aug 17, 2012	12.51	12.53	12.34	12.40
3665	NYSE	NAT	Thu, Aug 16, 2012	12.51	12.60	12.46	12.53
3664	NYSE	NAT	Wed, Aug 15, 2012	12.49	12.64	12.39	12.53
3663	NYSE	NAT	Tue, Aug 14, 2012	12.83	12.85	12.72	12.79
3662	NYSE	NAT	Mon, Aug 13, 2012	12.67	12.80	12.61	12.80
3661	NYSE	NAT	Fri, Aug 10, 2012	12.84	12.84	12.55	12.67
3660	NYSE	NAT	Thu, Aug 9, 2012	12.61	12.87	12.54	12.73
3659	NYSE	NAT	Wed, Aug 8, 2012	12.41	12.75	12.06	12.44
3658	NYSE	NAT	Tue, Aug 7, 2012	11.70	12.57	11.70	12.38
3657	NYSE	NAT	Mon, Aug 6, 2012	11.66	11.80	11.42	11.57
3656	NYSE	NAT	Fri, Aug 3, 2012	11.04	11.80	10.90	11.67
3655	NYSE	NAT	Thu, Aug 2, 2012	11.00	11.25	10.64	10.84
3654	NYSE	NAT	Wed, Aug 1, 2012	11.68	11.74	9.18	11.13
3653	NYSE	NAT	Tue, Jul 31, 2012	11.70	11.85	11.60	11.60
3652	NYSE	NAT	Mon, Jul 30, 2012	11.79	11.79	11.53	11.69
3651	NYSE	NAT	Fri, Jul 27, 2012	11.58	11.89	11.45	11.76
3650	NYSE	NAT	Thu, Jul 26, 2012	11.74	11.75	11.40	11.44
3649	NYSE	NAT	Wed, Jul 25, 2012	11.72	11.80	11.46	11.51
3648	NYSE	NAT	Tue, Jul 24, 2012	12.24	12.27	11.60	11.67
3647	NYSE	NAT	Mon, Jul 23, 2012	12.57	12.57	12.39	12.44
3646	NYSE	NAT	Fri, Jul 20, 2012	12.56	12.77	12.56	12.65
3645	NYSE	NAT	Thu, Jul 19, 2012	12.85	12.92	12.64	12.66
3644	NYSE	NAT	Wed, Jul 18, 2012	12.79	12.96	12.76	12.82
3643	NYSE	NAT	Tue, Jul 17, 2012	12.89	12.92	12.66	12.80
3642	NYSE	NAT	Mon, Jul 16, 2012	12.81	12.88	12.66	12.84
3641	NYSE	NAT	Fri, Jul 13, 2012	12.84	12.98	12.71	12.82
3640	NYSE	NAT	Thu, Jul 12, 2012	12.79	12.84	12.61	12.78
3639	NYSE	NAT	Wed, Jul 11, 2012	13.07	13.10	12.76	12.87
3638	NYSE	NAT	Tue, Jul 10, 2012	13.38	13.50	12.92	13.01
3637	NYSE	NAT	Mon, Jul 9, 2012	13.53	13.53	13.27	13.31
3636	NYSE	NAT	Fri, Jul 6, 2012	13.42	13.66	13.42	13.53
3635	NYSE	NAT	Thu, Jul 5, 2012	13.64	13.67	13.43	13.59
3634	NYSE	NAT	Tue, Jul 3, 2012	13.47	13.76	13.43	13.70
3633	NYSE	NAT	Mon, Jul 2, 2012	13.46	13.50	13.12	13.49
3632	NYSE	NAT	Fri, Jun 29, 2012	13.25	13.52	13.02	13.45
3631	NYSE	NAT	Thu, Jun 28, 2012	12.78	13.00	12.72	12.97
3630	NYSE	NAT	Wed, Jun 27, 2012	12.75	12.95	12.63	12.84
3629	NYSE	NAT	Tue, Jun 26, 2012	12.62	12.79	12.49	12.72
3628	NYSE	NAT	Mon, Jun 25, 2012	12.69	12.88	12.59	12.63
3627	NYSE	NAT	Fri, Jun 22, 2012	12.93	13.13	12.66	12.89
3626	NYSE	NAT	Thu, Jun 21, 2012	13.18	13.28	12.85	12.86
3625	NYSE	NAT	Wed, Jun 20, 2012	13.26	13.48	13.11	13.26
3624	NYSE	NAT	Tue, Jun 19, 2012	12.94	13.29	12.91	13.26
3623	NYSE	NAT	Mon, Jun 18, 2012	12.77	13.01	12.65	12.86
3622	NYSE	NAT	Fri, Jun 15, 2012	12.80	12.95	12.59	12.90
3621	NYSE	NAT	Thu, Jun 14, 2012	12.57	12.82	12.45	12.76
3620	NYSE	NAT	Wed, Jun 13, 2012	12.78	12.89	12.51	12.59
3619	NYSE	NAT	Tue, Jun 12, 2012	12.96	13.16	12.74	12.83
3618	NYSE	NAT	Mon, Jun 11, 2012	13.39	13.42	12.87	12.88
3617	NYSE	NAT	Fri, Jun 8, 2012	13.10	13.36	12.89	13.27
3616	NYSE	NAT	Thu, Jun 7, 2012	13.26	13.38	12.98	13.21
3615	NYSE	NAT	Wed, Jun 6, 2012	12.39	13.18	12.35	13.15
3614	NYSE	NAT	Tue, Jun 5, 2012	12.06	12.37	12.04	12.28
3613	NYSE	NAT	Mon, Jun 4, 2012	12.18	12.42	11.89	12.08
3612	NYSE	NAT	Fri, Jun 1, 2012	12.03	12.43	11.96	12.14
3611	NYSE	NAT	Thu, May 31, 2012	12.69	12.70	12.14	12.43
3610	NYSE	NAT	Wed, May 30, 2012	13.07	13.12	12.69	12.69
3609	NYSE	NAT	Tue, May 29, 2012	13.31	13.36	13.08	13.26
3608	NYSE	NAT	Fri, May 25, 2012	13.10	13.38	13.01	13.19
3607	NYSE	NAT	Thu, May 24, 2012	13.31	13.31	12.98	13.09
3606	NYSE	NAT	Wed, May 23, 2012	13.08	13.33	12.92	13.26
3605	NYSE	NAT	Tue, May 22, 2012	13.57	13.65	13.00	13.14
3604	NYSE	NAT	Mon, May 21, 2012	13.00	13.60	12.95	13.54
3603	NYSE	NAT	Fri, May 18, 2012	13.35	13.35	12.96	12.97
3602	NYSE	NAT	Thu, May 17, 2012	13.03	13.35	13.03	13.11
3601	NYSE	NAT	Wed, May 16, 2012	13.68	13.71	12.99	13.04
3600	NYSE	NAT	Tue, May 15, 2012	13.61	13.77	13.53	13.71
3599	NYSE	NAT	Mon, May 14, 2012	13.64	13.83	13.58	13.62
3598	NYSE	NAT	Fri, May 11, 2012	13.71	13.85	13.58	13.74
3597	NYSE	NAT	Thu, May 10, 2012	13.83	13.87	13.69	13.83
3596	NYSE	NAT	Wed, May 9, 2012	13.63	13.82	13.38	13.71
3595	NYSE	NAT	Tue, May 8, 2012	13.35	13.71	13.22	13.65
3594	NYSE	NAT	Mon, May 7, 2012	13.20	13.38	13.02	13.18
3593	NYSE	NAT	Fri, May 4, 2012	13.63	13.69	13.18	13.20
3592	NYSE	NAT	Thu, May 3, 2012	14.21	14.21	13.63	13.67
3591	NYSE	NAT	Wed, May 2, 2012	14.23	14.33	14.08	14.25
3590	NYSE	NAT	Tue, May 1, 2012	14.38	14.58	14.25	14.32
3589	NYSE	NAT	Mon, Apr 30, 2012	14.31	14.53	14.25	14.39
3588	NYSE	NAT	Fri, Apr 27, 2012	14.17	14.41	14.00	14.37
3587	NYSE	NAT	Thu, Apr 26, 2012	14.09	14.27	14.07	14.14
3586	NYSE	NAT	Wed, Apr 25, 2012	14.05	14.15	13.88	14.14
3585	NYSE	NAT	Tue, Apr 24, 2012	13.69	14.08	13.59	13.90
3584	NYSE	NAT	Mon, Apr 23, 2012	13.89	13.94	13.58	13.69
3583	NYSE	NAT	Fri, Apr 20, 2012	14.16	14.22	13.88	14.05
3582	NYSE	NAT	Thu, Apr 19, 2012	13.82	14.07	13.73	13.78
3581	NYSE	NAT	Wed, Apr 18, 2012	14.17	14.20	13.83	13.83
3580	NYSE	NAT	Tue, Apr 17, 2012	14.15	14.43	14.15	14.20
3579	NYSE	NAT	Mon, Apr 16, 2012	14.15	14.33	14.01	14.02
3578	NYSE	NAT	Fri, Apr 13, 2012	14.34	14.42	14.04	14.10
3577	NYSE	NAT	Thu, Apr 12, 2012	14.25	14.45	14.08	14.40
3576	NYSE	NAT	Wed, Apr 11, 2012	14.10	14.35	14.05	14.27
3575	NYSE	NAT	Tue, Apr 10, 2012	14.64	14.70	13.88	13.95
3574	NYSE	NAT	Mon, Apr 9, 2012	14.89	14.89	14.50	14.68
3573	NYSE	NAT	Thu, Apr 5, 2012	15.04	15.16	14.94	15.05
3572	NYSE	NAT	Wed, Apr 4, 2012	15.39	15.48	14.88	15.15
3571	NYSE	NAT	Tue, Apr 3, 2012	15.46	15.66	15.40	15.51
3570	NYSE	NAT	Mon, Apr 2, 2012	15.74	15.82	15.42	15.57
3569	NYSE	NAT	Fri, Mar 30, 2012	15.83	15.90	15.50	15.74
3568	NYSE	NAT	Thu, Mar 29, 2012	15.43	15.73	15.22	15.66
3567	NYSE	NAT	Wed, Mar 28, 2012	14.86	15.60	14.86	15.54
3566	NYSE	NAT	Tue, Mar 27, 2012	14.75	15.04	14.72	14.76
3565	NYSE	NAT	Mon, Mar 26, 2012	14.78	14.87	14.57	14.72
3564	NYSE	NAT	Fri, Mar 23, 2012	14.54	14.72	14.23	14.66
3563	NYSE	NAT	Thu, Mar 22, 2012	14.83	14.85	14.43	14.56
3562	NYSE	NAT	Wed, Mar 21, 2012	14.75	15.09	14.64	15.01
3561	NYSE	NAT	Tue, Mar 20, 2012	15.00	15.03	14.54	14.77
3560	NYSE	NAT	Mon, Mar 19, 2012	15.21	15.65	15.12	15.17
3559	NYSE	NAT	Fri, Mar 16, 2012	14.65	15.35	14.59	15.16
3558	NYSE	NAT	Thu, Mar 15, 2012	13.70	14.47	13.50	14.28
3557	NYSE	NAT	Wed, Mar 14, 2012	13.69	13.73	13.48	13.57
3556	NYSE	NAT	Tue, Mar 13, 2012	13.34	13.73	13.24	13.73
3555	NYSE	NAT	Mon, Mar 12, 2012	13.31	13.36	13.06	13.21
3554	NYSE	NAT	Fri, Mar 9, 2012	13.21	13.51	13.09	13.33
3553	NYSE	NAT	Thu, Mar 8, 2012	13.20	13.30	13.00	13.21
3552	NYSE	NAT	Wed, Mar 7, 2012	12.95	13.21	12.91	13.10
3551	NYSE	NAT	Tue, Mar 6, 2012	13.43	13.44	12.92	12.92
3550	NYSE	NAT	Mon, Mar 5, 2012	13.81	13.85	13.48	13.63
3549	NYSE	NAT	Fri, Mar 2, 2012	14.02	14.03	13.70	13.79
3548	NYSE	NAT	Thu, Mar 1, 2012	13.96	14.25	13.92	13.97
3547	NYSE	NAT	Wed, Feb 29, 2012	14.31	14.61	13.80	13.85
3546	NYSE	NAT	Tue, Feb 28, 2012	14.79	14.86	14.22	14.31
3545	NYSE	NAT	Mon, Feb 27, 2012	14.46	14.87	14.29	14.75
3544	NYSE	NAT	Fri, Feb 24, 2012	14.69	14.85	14.44	14.46
3543	NYSE	NAT	Thu, Feb 23, 2012	14.15	14.79	14.15	14.70
3542	NYSE	NAT	Wed, Feb 22, 2012	14.33	14.36	14.06	14.08
3541	NYSE	NAT	Tue, Feb 21, 2012	14.65	14.89	14.37	14.39
3540	NYSE	NAT	Fri, Feb 17, 2012	14.77	15.09	14.77	14.86
3539	NYSE	NAT	Thu, Feb 16, 2012	14.08	14.67	14.03	14.64
3538	NYSE	NAT	Wed, Feb 15, 2012	14.02	14.02	13.79	13.98
3537	NYSE	NAT	Tue, Feb 14, 2012	13.72	13.98	13.56	13.81
3536	NYSE	NAT	Mon, Feb 13, 2012	13.53	13.84	13.39	13.62
3535	NYSE	NAT	Fri, Feb 10, 2012	13.88	13.90	13.54	13.60
3534	NYSE	NAT	Thu, Feb 9, 2012	14.24	14.36	14.01	14.12
3533	NYSE	NAT	Wed, Feb 8, 2012	14.28	14.39	14.16	14.23
3532	NYSE	NAT	Tue, Feb 7, 2012	14.48	14.58	14.22	14.28
3531	NYSE	NAT	Mon, Feb 6, 2012	14.01	14.70	13.98	14.46
3530	NYSE	NAT	Fri, Feb 3, 2012	14.05	14.11	13.90	14.02
3529	NYSE	NAT	Thu, Feb 2, 2012	13.98	13.98	13.77	13.95
3528	NYSE	NAT	Wed, Feb 1, 2012	13.88	14.07	13.75	13.88
3527	NYSE	NAT	Tue, Jan 31, 2012	13.95	14.04	13.63	13.74
3526	NYSE	NAT	Mon, Jan 30, 2012	13.92	14.08	13.82	13.85
3525	NYSE	NAT	Fri, Jan 27, 2012	13.83	14.15	13.83	13.97
3524	NYSE	NAT	Thu, Jan 26, 2012	13.87	13.98	13.73	13.86
3523	NYSE	NAT	Wed, Jan 25, 2012	13.63	13.87	13.49	13.78
3522	NYSE	NAT	Tue, Jan 24, 2012	13.65	13.70	13.52	13.63
3521	NYSE	NAT	Mon, Jan 23, 2012	13.82	13.96	13.41	13.68
3520	NYSE	NAT	Fri, Jan 20, 2012	13.79	13.97	13.72	13.85
3519	NYSE	NAT	Thu, Jan 19, 2012	13.69	14.03	13.64	13.81
3518	NYSE	NAT	Wed, Jan 18, 2012	15.07	15.52	15.03	15.43
3517	NYSE	NAT	Tue, Jan 17, 2012	14.92	15.21	14.78	15.03
3516	NYSE	NAT	Fri, Jan 13, 2012	14.68	14.86	14.27	14.63
3515	NYSE	NAT	Thu, Jan 12, 2012	14.05	14.57	13.96	14.47
3514	NYSE	NAT	Wed, Jan 11, 2012	13.89	14.03	13.75	13.99
3513	NYSE	NAT	Tue, Jan 10, 2012	13.38	13.93	13.37	13.92
3512	NYSE	NAT	Mon, Jan 9, 2012	12.98	13.36	12.98	13.26
3511	NYSE	NAT	Fri, Jan 6, 2012	13.03	13.27	12.89	12.98
3510	NYSE	NAT	Thu, Jan 5, 2012	12.67	13.06	12.52	13.03
3509	NYSE	NAT	Wed, Jan 4, 2012	12.56	12.83	12.35	12.72
3508	NYSE	NAT	Tue, Jan 3, 2012	12.09	12.64	12.09	12.52
3507	NYSE	NAT	Fri, Dec 30, 2011	11.60	11.92	11.57	11.88
3506	NYSE	NAT	Thu, Dec 29, 2011	11.65	11.77	11.58	11.64
3505	NYSE	NAT	Wed, Dec 28, 2011	11.75	11.78	11.54	11.63
3504	NYSE	NAT	Tue, Dec 27, 2011	11.94	12.03	11.74	11.76
3503	NYSE	NAT	Fri, Dec 23, 2011	11.99	12.06	11.86	11.91
3502	NYSE	NAT	Thu, Dec 22, 2011	11.81	12.01	11.77	11.99
3501	NYSE	NAT	Wed, Dec 21, 2011	11.68	11.76	11.59	11.71
3500	NYSE	NAT	Tue, Dec 20, 2011	11.89	11.98	11.64	11.75
3499	NYSE	NAT	Mon, Dec 19, 2011	12.09	12.17	11.56	11.59
3498	NYSE	NAT	Fri, Dec 16, 2011	12.14	12.27	11.90	12.02
3497	NYSE	NAT	Thu, Dec 15, 2011	11.98	12.15	11.85	11.97
3496	NYSE	NAT	Wed, Dec 14, 2011	11.99	12.09	11.81	11.83
3495	NYSE	NAT	Tue, Dec 13, 2011	12.55	12.77	12.02	12.09
3494	NYSE	NAT	Mon, Dec 12, 2011	12.59	12.64	12.39	12.51
3493	NYSE	NAT	Fri, Dec 9, 2011	12.67	12.82	12.46	12.76
3492	NYSE	NAT	Thu, Dec 8, 2011	12.89	12.96	12.49	12.52
3491	NYSE	NAT	Wed, Dec 7, 2011	13.01	13.14	12.87	13.06
3490	NYSE	NAT	Tue, Dec 6, 2011	12.92	13.29	12.79	13.10
3489	NYSE	NAT	Mon, Dec 5, 2011	12.70	12.98	12.49	12.64
3488	NYSE	NAT	Fri, Dec 2, 2011	11.97	12.08	11.76	11.84
3487	NYSE	NAT	Thu, Dec 1, 2011	12.36	12.39	11.79	11.79
3486	NYSE	NAT	Wed, Nov 30, 2011	12.07	12.51	12.07	12.42
3485	NYSE	NAT	Tue, Nov 29, 2011	12.19	12.20	11.79	11.82
3484	NYSE	NAT	Mon, Nov 28, 2011	12.33	12.39	12.01	12.16
3483	NYSE	NAT	Fri, Nov 25, 2011	12.08	12.19	11.89	11.89
3482	NYSE	NAT	Wed, Nov 23, 2011	12.41	12.45	11.99	12.13
3481	NYSE	NAT	Tue, Nov 22, 2011	12.85	12.95	12.36	12.52
3480	NYSE	NAT	Mon, Nov 21, 2011	13.68	13.72	13.12	13.22
3479	NYSE	NAT	Fri, Nov 18, 2011	14.15	14.27	14.09	14.20
3478	NYSE	NAT	Thu, Nov 17, 2011	14.17	14.40	13.77	14.07
3477	NYSE	NAT	Wed, Nov 16, 2011	14.33	14.50	14.10	14.12
3476	NYSE	NAT	Tue, Nov 15, 2011	14.16	14.45	14.07	14.35
3475	NYSE	NAT	Mon, Nov 14, 2011	14.35	14.35	13.88	14.14
3474	NYSE	NAT	Fri, Nov 11, 2011	14.09	14.37	14.06	14.35
3473	NYSE	NAT	Thu, Nov 10, 2011	14.11	14.24	13.88	13.95
3472	NYSE	NAT	Wed, Nov 9, 2011	13.63	13.77	13.50	13.67
3471	NYSE	NAT	Tue, Nov 8, 2011	13.88	13.93	13.44	13.81
3470	NYSE	NAT	Mon, Nov 7, 2011	14.00	14.22	13.39	13.57
3469	NYSE	NAT	Fri, Nov 4, 2011	14.08	14.20	13.88	14.07
3468	NYSE	NAT	Thu, Nov 3, 2011	14.31	14.41	13.89	14.19
3467	NYSE	NAT	Wed, Nov 2, 2011	14.12	14.29	13.87	14.15
3466	NYSE	NAT	Tue, Nov 1, 2011	13.79	14.19	13.28	13.91
3465	NYSE	NAT	Mon, Oct 31, 2011	15.01	15.11	14.27	14.29
3464	NYSE	NAT	Fri, Oct 28, 2011	15.07	15.39	14.93	15.13
3463	NYSE	NAT	Thu, Oct 27, 2011	14.73	15.81	14.70	15.18
3462	NYSE	NAT	Wed, Oct 26, 2011	14.29	14.37	13.85	14.21
3461	NYSE	NAT	Tue, Oct 25, 2011	14.37	14.37	13.88	14.10
3460	NYSE	NAT	Mon, Oct 24, 2011	14.40	14.82	14.22	14.33
3459	NYSE	NAT	Fri, Oct 21, 2011	14.04	14.25	13.92	14.25
3458	NYSE	NAT	Thu, Oct 20, 2011	14.17	14.17	13.52	13.81
3457	NYSE	NAT	Wed, Oct 19, 2011	14.44	14.44	13.96	14.06
3456	NYSE	NAT	Tue, Oct 18, 2011	14.17	14.50	13.95	14.37
3455	NYSE	NAT	Mon, Oct 17, 2011	14.61	14.68	14.08	14.11
3454	NYSE	NAT	Fri, Oct 14, 2011	14.52	14.76	14.44	14.69
3453	NYSE	NAT	Thu, Oct 13, 2011	14.19	14.38	13.84	14.37
3452	NYSE	NAT	Wed, Oct 12, 2011	14.12	14.45	14.08	14.27
3451	NYSE	NAT	Tue, Oct 11, 2011	13.26	13.92	13.16	13.89
3450	NYSE	NAT	Mon, Oct 10, 2011	12.66	13.33	12.64	13.32
3449	NYSE	NAT	Fri, Oct 7, 2011	12.84	12.91	12.33	12.45
3448	NYSE	NAT	Thu, Oct 6, 2011	12.89	13.00	12.60	12.79
3447	NYSE	NAT	Wed, Oct 5, 2011	12.89	13.33	12.61	12.88
3446	NYSE	NAT	Tue, Oct 4, 2011	12.02	13.00	11.48	12.93
3445	NYSE	NAT	Mon, Oct 3, 2011	13.86	13.92	12.14	12.18
3444	NYSE	NAT	Fri, Sep 30, 2011	14.57	14.72	13.95	13.98
3443	NYSE	NAT	Thu, Sep 29, 2011	15.10	15.12	14.37	14.80
3442	NYSE	NAT	Wed, Sep 28, 2011	15.14	15.27	14.80	14.80
3441	NYSE	NAT	Tue, Sep 27, 2011	15.57	15.60	15.11	15.24
3440	NYSE	NAT	Mon, Sep 26, 2011	15.59	15.60	15.12	15.31
3439	NYSE	NAT	Fri, Sep 23, 2011	15.23	15.90	15.17	15.55
3438	NYSE	NAT	Thu, Sep 22, 2011	15.36	16.01	15.07	15.23
3437	NYSE	NAT	Wed, Sep 21, 2011	16.16	16.31	15.64	15.66
3436	NYSE	NAT	Tue, Sep 20, 2011	16.42	16.79	16.16	16.16
3435	NYSE	NAT	Mon, Sep 19, 2011	16.61	16.71	16.35	16.43
3434	NYSE	NAT	Fri, Sep 16, 2011	16.99	17.15	16.80	16.88
3433	NYSE	NAT	Thu, Sep 15, 2011	16.70	17.12	16.70	17.05
3432	NYSE	NAT	Wed, Sep 14, 2011	16.75	16.82	16.42	16.79
3431	NYSE	NAT	Tue, Sep 13, 2011	16.69	16.79	16.50	16.66
3430	NYSE	NAT	Mon, Sep 12, 2011	16.38	16.83	16.30	16.68
3429	NYSE	NAT	Fri, Sep 9, 2011	16.54	16.84	16.45	16.59
3428	NYSE	NAT	Thu, Sep 8, 2011	16.94	17.10	16.60	16.60
3427	NYSE	NAT	Wed, Sep 7, 2011	17.26	17.37	16.97	17.06
3426	NYSE	NAT	Tue, Sep 6, 2011	16.82	17.10	16.63	17.04
3425	NYSE	NAT	Fri, Sep 2, 2011	17.30	17.53	17.09	17.10
3424	NYSE	NAT	Thu, Sep 1, 2011	18.11	18.75	17.64	17.67
3423	NYSE	NAT	Wed, Aug 31, 2011	18.18	18.29	17.69	17.79
3422	NYSE	NAT	Tue, Aug 30, 2011	17.74	18.29	17.74	18.13
3421	NYSE	NAT	Mon, Aug 29, 2011	17.35	17.83	17.35	17.81
3420	NYSE	NAT	Fri, Aug 26, 2011	16.86	17.35	16.78	17.18
3419	NYSE	NAT	Thu, Aug 25, 2011	17.34	17.54	16.77	16.97
3418	NYSE	NAT	Wed, Aug 24, 2011	17.25	17.74	16.90	17.26
3417	NYSE	NAT	Tue, Aug 23, 2011	16.85	17.34	16.55	17.31
3416	NYSE	NAT	Mon, Aug 22, 2011	16.90	17.19	16.46	16.73
3415	NYSE	NAT	Fri, Aug 19, 2011	16.60	17.35	16.55	16.55
3414	NYSE	NAT	Thu, Aug 18, 2011	17.41	17.69	16.55	16.82
3413	NYSE	NAT	Wed, Aug 17, 2011	18.14	18.24	17.68	17.84
3412	NYSE	NAT	Tue, Aug 16, 2011	18.49	18.60	18.12	18.30
3411	NYSE	NAT	Mon, Aug 15, 2011	18.12	18.69	18.05	18.68
3410	NYSE	NAT	Fri, Aug 12, 2011	18.50	18.54	17.94	18.01
3409	NYSE	NAT	Thu, Aug 11, 2011	18.42	18.71	18.06	18.27
3408	NYSE	NAT	Wed, Aug 10, 2011	18.12	18.94	17.86	18.27
3407	NYSE	NAT	Tue, Aug 9, 2011	18.25	19.06	17.56	19.06
3406	NYSE	NAT	Mon, Aug 8, 2011	15.90	17.16	15.88	16.38
3405	NYSE	NAT	Fri, Aug 5, 2011	18.17	18.65	17.13	18.02
3404	NYSE	NAT	Thu, Aug 4, 2011	18.76	18.88	18.09	18.12
3403	NYSE	NAT	Wed, Aug 3, 2011	19.60	19.68	18.62	19.14
3402	NYSE	NAT	Tue, Aug 2, 2011	20.62	20.66	19.61	19.64
3401	NYSE	NAT	Mon, Aug 1, 2011	20.51	20.71	20.26	20.51
3400	NYSE	NAT	Fri, Jul 29, 2011	19.57	20.35	19.41	20.30
3399	NYSE	NAT	Thu, Jul 28, 2011	20.06	20.29	19.63	19.80
3398	NYSE	NAT	Wed, Jul 27, 2011	20.36	20.47	20.00	20.13
3397	NYSE	NAT	Tue, Jul 26, 2011	20.49	20.77	20.38	20.47
3396	NYSE	NAT	Mon, Jul 25, 2011	21.57	21.63	20.33	20.51
3395	NYSE	NAT	Fri, Jul 22, 2011	21.93	21.97	21.77	21.97
3394	NYSE	NAT	Thu, Jul 21, 2011	21.70	21.95	21.67	21.91
3393	NYSE	NAT	Wed, Jul 20, 2011	21.57	21.77	21.56	21.67
3392	NYSE	NAT	Tue, Jul 19, 2011	21.44	21.79	21.44	21.63
3391	NYSE	NAT	Mon, Jul 18, 2011	21.97	22.05	21.32	21.40
3390	NYSE	NAT	Fri, Jul 15, 2011	21.92	22.27	21.80	22.13
3389	NYSE	NAT	Thu, Jul 14, 2011	21.80	21.99	21.67	21.79
3388	NYSE	NAT	Wed, Jul 13, 2011	21.72	21.88	21.46	21.79
3387	NYSE	NAT	Tue, Jul 12, 2011	21.51	21.81	21.47	21.64
3386	NYSE	NAT	Mon, Jul 11, 2011	22.00	22.00	21.54	21.62
3385	NYSE	NAT	Fri, Jul 8, 2011	22.02	22.20	21.84	22.19
3384	NYSE	NAT	Thu, Jul 7, 2011	22.27	22.66	22.04	22.12
3383	NYSE	NAT	Wed, Jul 6, 2011	22.62	22.70	22.04	22.21
3382	NYSE	NAT	Tue, Jul 5, 2011	22.70	22.80	22.41	22.71
3381	NYSE	NAT	Fri, Jul 1, 2011	22.48	22.77	22.44	22.63
3380	NYSE	NAT	Thu, Jun 30, 2011	22.30	22.69	21.97	22.54
3379	NYSE	NAT	Wed, Jun 29, 2011	21.81	22.24	21.71	22.22
3378	NYSE	NAT	Tue, Jun 28, 2011	22.38	22.38	21.47	21.81
3377	NYSE	NAT	Mon, Jun 27, 2011	21.72	21.81	21.22	21.75
3376	NYSE	NAT	Fri, Jun 24, 2011	22.82	22.93	21.72	21.83
3375	NYSE	NAT	Thu, Jun 23, 2011	22.44	23.05	21.95	22.86
3374	NYSE	NAT	Wed, Jun 22, 2011	22.80	22.88	22.51	22.62
3373	NYSE	NAT	Tue, Jun 21, 2011	22.66	23.09	22.66	22.94
3372	NYSE	NAT	Mon, Jun 20, 2011	22.53	22.60	22.19	22.57
3371	NYSE	NAT	Fri, Jun 17, 2011	22.30	22.53	22.20	22.42
3370	NYSE	NAT	Thu, Jun 16, 2011	21.92	22.30	21.81	22.08
3369	NYSE	NAT	Wed, Jun 15, 2011	22.00	22.17	21.81	21.97
3368	NYSE	NAT	Tue, Jun 14, 2011	22.65	22.65	21.99	22.14
3367	NYSE	NAT	Mon, Jun 13, 2011	21.84	22.20	21.84	22.01
3366	NYSE	NAT	Fri, Jun 10, 2011	21.96	22.30	21.57	21.84
3365	NYSE	NAT	Thu, Jun 9, 2011	22.09	22.20	21.96	22.06
3364	NYSE	NAT	Wed, Jun 8, 2011	22.70	22.80	21.96	22.11
3363	NYSE	NAT	Tue, Jun 7, 2011	22.75	22.88	22.56	22.70
3362	NYSE	NAT	Mon, Jun 6, 2011	22.85	23.14	22.60	22.70
3361	NYSE	NAT	Fri, Jun 3, 2011	22.82	23.00	22.56	22.81
3360	NYSE	NAT	Thu, Jun 2, 2011	22.92	23.39	22.92	23.04
3359	NYSE	NAT	Wed, Jun 1, 2011	23.33	23.45	22.76	22.80
3358	NYSE	NAT	Tue, May 31, 2011	22.95	23.20	22.90	23.15
3357	NYSE	NAT	Fri, May 27, 2011	22.44	22.74	22.37	22.69
3356	NYSE	NAT	Thu, May 26, 2011	22.43	22.67	22.15	22.46
3355	NYSE	NAT	Wed, May 25, 2011	22.85	23.02	22.23	22.43
3354	NYSE	NAT	Tue, May 24, 2011	23.59	23.75	22.94	23.03
3353	NYSE	NAT	Mon, May 23, 2011	23.61	23.73	23.31	23.61
3352	NYSE	NAT	Fri, May 20, 2011	23.92	24.01	23.66	23.84
3351	NYSE	NAT	Thu, May 19, 2011	23.90	24.03	23.69	23.83
3350	NYSE	NAT	Wed, May 18, 2011	23.67	23.78	23.40	23.75
3349	NYSE	NAT	Tue, May 17, 2011	23.29	23.90	23.19	23.62
3348	NYSE	NAT	Mon, May 16, 2011	23.98	23.79	23.27	23.37
3347	NYSE	NAT	Fri, May 13, 2011	23.94	24.53	24.06	24.12
3346	NYSE	NAT	Thu, May 12, 2011	23.90	24.19	23.40	23.99
3345	NYSE	NAT	Wed, May 11, 2011	24.30	24.53	23.69	23.74
3344	NYSE	NAT	Tue, May 10, 2011	24.48	24.48	24.05	24.29
3343	NYSE	NAT	Mon, May 9, 2011	22.66	24.62	22.50	24.25
3342	NYSE	NAT	Fri, May 6, 2011	22.21	22.75	22.17	22.19
3341	NYSE	NAT	Thu, May 5, 2011	22.31	22.45	22.06	22.16
3340	NYSE	NAT	Wed, May 4, 2011	22.62	22.88	22.05	22.30
3339	NYSE	NAT	Tue, May 3, 2011	22.80	23.00	22.39	22.66
3338	NYSE	NAT	Mon, May 2, 2011	22.81	23.00	22.57	22.87
3337	NYSE	NAT	Fri, Apr 29, 2011	22.78	22.82	22.60	22.78
3336	NYSE	NAT	Thu, Apr 28, 2011	22.69	22.88	22.68	22.84
3335	NYSE	NAT	Wed, Apr 27, 2011	22.82	22.86	22.70	22.80
3334	NYSE	NAT	Tue, Apr 26, 2011	22.60	22.86	22.48	22.80
3333	NYSE	NAT	Mon, Apr 25, 2011	22.19	22.65	22.19	22.60
3332	NYSE	NAT	Thu, Apr 21, 2011	22.13	22.24	21.92	22.15
3331	NYSE	NAT	Wed, Apr 20, 2011	22.19	22.34	22.09	22.15
3330	NYSE	NAT	Tue, Apr 19, 2011	22.63	22.70	21.97	22.07
3329	NYSE	NAT	Mon, Apr 18, 2011	22.86	22.86	22.57	22.66
3328	NYSE	NAT	Fri, Apr 15, 2011	23.11	23.20	22.85	22.96
3327	NYSE	NAT	Thu, Apr 14, 2011	23.14	23.19	22.95	23.16
3326	NYSE	NAT	Wed, Apr 13, 2011	23.55	23.59	23.07	23.20
3325	NYSE	NAT	Tue, Apr 12, 2011	23.65	23.78	23.06	23.45
3324	NYSE	NAT	Mon, Apr 11, 2011	24.10	24.19	23.74	23.81
3323	NYSE	NAT	Fri, Apr 8, 2011	24.56	24.60	24.08	24.19
3322	NYSE	NAT	Thu, Apr 7, 2011	24.43	24.60	24.36	24.48
3321	NYSE	NAT	Wed, Apr 6, 2011	24.17	24.40	24.17	24.38
3320	NYSE	NAT	Tue, Apr 5, 2011	24.27	24.41	23.92	24.10
3319	NYSE	NAT	Mon, Apr 4, 2011	24.71	24.78	24.28	24.29
3318	NYSE	NAT	Fri, Apr 1, 2011	24.87	24.97	24.68	24.70
3317	NYSE	NAT	Thu, Mar 31, 2011	24.68	24.81	24.59	24.62
3316	NYSE	NAT	Wed, Mar 30, 2011	24.97	25.19	24.60	24.61
3315	NYSE	NAT	Tue, Mar 29, 2011	24.87	25.17	24.87	25.04
3314	NYSE	NAT	Mon, Mar 28, 2011	25.28	25.41	24.91	24.91
3313	NYSE	NAT	Fri, Mar 25, 2011	25.13	25.33	25.08	25.18
3312	NYSE	NAT	Thu, Mar 24, 2011	25.34	25.42	25.03	25.08
3311	NYSE	NAT	Wed, Mar 23, 2011	25.38	25.50	25.14	25.31
3310	NYSE	NAT	Tue, Mar 22, 2011	25.28	25.66	25.21	25.35
3309	NYSE	NAT	Mon, Mar 21, 2011	25.46	25.57	25.19	25.35
3308	NYSE	NAT	Fri, Mar 18, 2011	25.11	25.26	24.88	25.21
3307	NYSE	NAT	Thu, Mar 17, 2011	25.38	25.42	24.84	24.90
3306	NYSE	NAT	Wed, Mar 16, 2011	25.73	25.95	25.00	25.03
3305	NYSE	NAT	Tue, Mar 15, 2011	25.03	25.64	24.73	25.32
3304	NYSE	NAT	Mon, Mar 14, 2011	24.77	25.11	24.62	25.07
3303	NYSE	NAT	Fri, Mar 11, 2011	24.54	25.02	24.54	24.87
3302	NYSE	NAT	Thu, Mar 10, 2011	25.11	25.18	24.61	24.80
3301	NYSE	NAT	Wed, Mar 9, 2011	24.84	25.57	24.84	25.31
3300	NYSE	NAT	Tue, Mar 8, 2011	24.72	24.98	24.71	24.90
3299	NYSE	NAT	Mon, Mar 7, 2011	24.65	24.87	24.64	24.81
3298	NYSE	NAT	Fri, Mar 4, 2011	24.34	24.71	24.30	24.68
3297	NYSE	NAT	Thu, Mar 3, 2011	24.35	24.56	24.25	24.38
3296	NYSE	NAT	Wed, Mar 2, 2011	23.90	24.35	23.90	24.23
3295	NYSE	NAT	Tue, Mar 1, 2011	24.41	24.49	23.96	23.99
3294	NYSE	NAT	Mon, Feb 28, 2011	24.19	24.38	24.12	24.27
3293	NYSE	NAT	Fri, Feb 25, 2011	23.61	24.22	23.61	24.20
3292	NYSE	NAT	Thu, Feb 24, 2011	23.67	23.75	23.41	23.55
3291	NYSE	NAT	Wed, Feb 23, 2011	23.86	23.96	23.39	23.67
3290	NYSE	NAT	Tue, Feb 22, 2011	24.41	24.41	23.80	23.86
3289	NYSE	NAT	Fri, Feb 18, 2011	24.69	24.78	24.42	24.66
3288	NYSE	NAT	Thu, Feb 17, 2011	24.41	24.65	24.32	24.65
3287	NYSE	NAT	Wed, Feb 16, 2011	24.07	24.55	23.94	24.38
3286	NYSE	NAT	Tue, Feb 15, 2011	24.39	24.43	23.86	23.96
3285	NYSE	NAT	Mon, Feb 14, 2011	24.73	24.77	24.33	24.53
3284	NYSE	NAT	Fri, Feb 11, 2011	24.79	24.79	24.40	24.62
3283	NYSE	NAT	Thu, Feb 10, 2011	24.29	24.53	24.29	24.49
3282	NYSE	NAT	Wed, Feb 9, 2011	24.43	24.56	24.19	24.27
3281	NYSE	NAT	Tue, Feb 8, 2011	24.30	24.58	24.19	24.49
3280	NYSE	NAT	Mon, Feb 7, 2011	24.28	24.43	24.22	24.33
3279	NYSE	NAT	Fri, Feb 4, 2011	24.31	24.48	24.20	24.29
3278	NYSE	NAT	Thu, Feb 3, 2011	24.21	24.43	24.04	24.28
3277	NYSE	NAT	Wed, Feb 2, 2011	24.11	24.47	24.00	24.14
3276	NYSE	NAT	Tue, Feb 1, 2011	24.30	24.38	24.06	24.10
3275	NYSE	NAT	Mon, Jan 31, 2011	24.68	24.68	23.90	24.23
3274	NYSE	NAT	Fri, Jan 28, 2011	23.96	25.28	23.79	24.65
3273	NYSE	NAT	Thu, Jan 27, 2011	24.12	24.12	23.85	23.86
3272	NYSE	NAT	Wed, Jan 26, 2011	24.16	24.29	23.90	24.01
3271	NYSE	NAT	Tue, Jan 25, 2011	24.14	24.18	23.96	24.17
3270	NYSE	NAT	Mon, Jan 24, 2011	24.28	24.34	24.09	24.22
3269	NYSE	NAT	Fri, Jan 21, 2011	25.24	25.68	23.84	24.24
3268	NYSE	NAT	Thu, Jan 20, 2011	25.68	25.68	25.37	25.41
3267	NYSE	NAT	Wed, Jan 19, 2011	25.76	25.92	25.67	25.69
3266	NYSE	NAT	Tue, Jan 18, 2011	25.83	25.87	25.77	25.82
3265	NYSE	NAT	Fri, Jan 14, 2011	25.95	25.97	25.81	25.90
3264	NYSE	NAT	Thu, Jan 13, 2011	26.04	26.17	25.94	25.98
3263	NYSE	NAT	Wed, Jan 12, 2011	26.13	26.18	25.94	26.08
3262	NYSE	NAT	Tue, Jan 11, 2011	26.30	26.31	25.94	26.06
3261	NYSE	NAT	Mon, Jan 10, 2011	26.33	26.39	26.07	26.26
3260	NYSE	NAT	Fri, Jan 7, 2011	26.47	26.55	25.94	26.39
3259	NYSE	NAT	Thu, Jan 6, 2011	26.00	26.56	25.99	26.39
3258	NYSE	NAT	Wed, Jan 5, 2011	25.82	26.12	25.81	26.02
3257	NYSE	NAT	Tue, Jan 4, 2011	26.08	26.17	25.82	25.83
3256	NYSE	NAT	Mon, Jan 3, 2011	26.02	26.21	25.92	26.06
3255	NYSE	NAT	Fri, Dec 31, 2010	25.84	25.99	25.68	25.79
3254	NYSE	NAT	Thu, Dec 30, 2010	25.67	26.02	25.67	26.01
3253	NYSE	NAT	Wed, Dec 29, 2010	25.64	25.72	25.55	25.70
3252	NYSE	NAT	Tue, Dec 28, 2010	25.84	25.92	25.57	25.64
3251	NYSE	NAT	Mon, Dec 27, 2010	26.06	26.06	25.77	25.81
3250	NYSE	NAT	Thu, Dec 23, 2010	26.20	26.29	26.07	26.08
3249	NYSE	NAT	Wed, Dec 22, 2010	25.87	26.28	25.82	26.20
3248	NYSE	NAT	Tue, Dec 21, 2010	25.67	25.96	25.67	25.86
3247	NYSE	NAT	Mon, Dec 20, 2010	25.52	25.76	25.52	25.64
3246	NYSE	NAT	Fri, Dec 17, 2010	25.66	25.72	25.42	25.52
3245	NYSE	NAT	Thu, Dec 16, 2010	25.67	25.84	25.67	25.73
3244	NYSE	NAT	Wed, Dec 15, 2010	25.78	26.00	25.62	25.69
3243	NYSE	NAT	Tue, Dec 14, 2010	26.10	26.26	25.82	25.86
3242	NYSE	NAT	Mon, Dec 13, 2010	26.16	26.29	26.04	26.11
3241	NYSE	NAT	Fri, Dec 10, 2010	26.02	26.20	25.76	26.16
3240	NYSE	NAT	Thu, Dec 9, 2010	25.72	25.75	25.61	25.71
3239	NYSE	NAT	Wed, Dec 8, 2010	25.53	25.76	25.52	25.67
3238	NYSE	NAT	Tue, Dec 7, 2010	25.99	26.02	25.44	25.55
3237	NYSE	NAT	Mon, Dec 6, 2010	25.29	26.00	25.29	25.85
3236	NYSE	NAT	Fri, Dec 3, 2010	25.48	25.49	25.28	25.37
3235	NYSE	NAT	Thu, Dec 2, 2010	25.72	25.72	25.43	25.49
3234	NYSE	NAT	Wed, Dec 1, 2010	25.78	26.02	25.56	25.73
3233	NYSE	NAT	Tue, Nov 30, 2010	25.77	25.86	25.55	25.64
3232	NYSE	NAT	Mon, Nov 29, 2010	25.68	25.97	25.52	25.93
3231	NYSE	NAT	Fri, Nov 26, 2010	25.78	25.89	25.68	25.70
3230	NYSE	NAT	Wed, Nov 24, 2010	25.89	26.11	25.80	25.91
3229	NYSE	NAT	Tue, Nov 23, 2010	25.99	26.01	25.68	25.81
3228	NYSE	NAT	Mon, Nov 22, 2010	26.46	26.46	25.98	26.24
3227	NYSE	NAT	Fri, Nov 19, 2010	26.37	26.57	26.36	26.45
3226	NYSE	NAT	Thu, Nov 18, 2010	26.74	26.74	26.38	26.38
3225	NYSE	NAT	Wed, Nov 17, 2010	26.71	26.81	26.56	26.70
3224	NYSE	NAT	Tue, Nov 16, 2010	26.61	26.78	26.50	26.73
3223	NYSE	NAT	Mon, Nov 15, 2010	26.71	26.96	26.55	26.81
3222	NYSE	NAT	Fri, Nov 12, 2010	26.64	26.78	26.51	26.66
3221	NYSE	NAT	Thu, Nov 11, 2010	26.62	26.83	26.56	26.80
3220	NYSE	NAT	Wed, Nov 10, 2010	26.52	26.80	26.42	26.75
3219	NYSE	NAT	Tue, Nov 9, 2010	26.68	26.95	26.42	26.51
3218	NYSE	NAT	Mon, Nov 8, 2010	26.75	27.26	26.37	27.03
3217	NYSE	NAT	Fri, Nov 5, 2010	26.74	27.08	26.72	26.94
3216	NYSE	NAT	Thu, Nov 4, 2010	26.51	26.74	26.46	26.69
3215	NYSE	NAT	Wed, Nov 3, 2010	26.42	26.47	26.07	26.38
3214	NYSE	NAT	Tue, Nov 2, 2010	26.16	26.45	26.03	26.43
3213	NYSE	NAT	Mon, Nov 1, 2010	25.89	26.17	25.79	25.89
3212	NYSE	NAT	Fri, Oct 29, 2010	25.67	25.88	25.49	25.80
3211	NYSE	NAT	Thu, Oct 28, 2010	25.63	25.84	25.43	25.76
3210	NYSE	NAT	Wed, Oct 27, 2010	25.81	26.02	25.05	25.59
3209	NYSE	NAT	Tue, Oct 26, 2010	26.19	26.20	25.78	25.90
3208	NYSE	NAT	Mon, Oct 25, 2010	26.54	26.74	26.27	26.31
3207	NYSE	NAT	Fri, Oct 22, 2010	26.53	26.54	26.31	26.54
3206	NYSE	NAT	Thu, Oct 21, 2010	26.60	26.60	26.31	26.48
3205	NYSE	NAT	Wed, Oct 20, 2010	26.51	26.61	26.34	26.42
3204	NYSE	NAT	Tue, Oct 19, 2010	26.50	26.64	26.29	26.48
3203	NYSE	NAT	Mon, Oct 18, 2010	26.39	26.73	26.36	26.66
3202	NYSE	NAT	Fri, Oct 15, 2010	26.58	26.68	26.29	26.40
3201	NYSE	NAT	Thu, Oct 14, 2010	26.76	26.76	26.27	26.44
3200	NYSE	NAT	Wed, Oct 13, 2010	26.82	26.96	26.67	26.86
3199	NYSE	NAT	Tue, Oct 12, 2010	26.93	27.01	26.63	26.77
3198	NYSE	NAT	Mon, Oct 11, 2010	26.87	27.18	26.87	26.93
3197	NYSE	NAT	Fri, Oct 8, 2010	26.62	27.01	26.59	26.87
3196	NYSE	NAT	Thu, Oct 7, 2010	26.84	26.84	26.55	26.63
3195	NYSE	NAT	Wed, Oct 6, 2010	26.66	26.77	26.59	26.73
3194	NYSE	NAT	Tue, Oct 5, 2010	26.74	26.74	26.40	26.67
3193	NYSE	NAT	Mon, Oct 4, 2010	26.69	26.76	26.30	26.42
3192	NYSE	NAT	Fri, Oct 1, 2010	26.63	26.65	26.35	26.55
3191	NYSE	NAT	Thu, Sep 30, 2010	26.74	26.88	26.37	26.52
3190	NYSE	NAT	Wed, Sep 29, 2010	26.44	26.71	26.28	26.69
3189	NYSE	NAT	Tue, Sep 28, 2010	26.45	26.55	26.17	26.45
3188	NYSE	NAT	Mon, Sep 27, 2010	26.37	26.41	26.20	26.35
3187	NYSE	NAT	Fri, Sep 24, 2010	26.39	26.44	26.20	26.32
3186	NYSE	NAT	Thu, Sep 23, 2010	26.71	26.73	26.11	26.20
3185	NYSE	NAT	Wed, Sep 22, 2010	26.96	27.25	26.68	26.78
3184	NYSE	NAT	Tue, Sep 21, 2010	26.90	27.25	26.90	26.98
3183	NYSE	NAT	Mon, Sep 20, 2010	26.83	27.06	26.58	26.96
3182	NYSE	NAT	Fri, Sep 17, 2010	26.64	26.92	26.51	26.70
3181	NYSE	NAT	Thu, Sep 16, 2010	26.56	26.66	26.47	26.62
3180	NYSE	NAT	Wed, Sep 15, 2010	26.73	26.79	26.43	26.63
3179	NYSE	NAT	Tue, Sep 14, 2010	26.98	27.04	26.73	26.75
3178	NYSE	NAT	Mon, Sep 13, 2010	26.96	27.16	26.81	26.90
3177	NYSE	NAT	Fri, Sep 10, 2010	26.86	27.05	26.71	26.81
3176	NYSE	NAT	Thu, Sep 9, 2010	26.92	27.09	26.72	26.80
3175	NYSE	NAT	Wed, Sep 8, 2010	26.52	27.01	26.52	26.65
3174	NYSE	NAT	Tue, Sep 7, 2010	27.24	27.26	26.47	26.53
3173	NYSE	NAT	Fri, Sep 3, 2010	27.23	27.67	27.15	27.47
3172	NYSE	NAT	Thu, Sep 2, 2010	26.99	27.15	26.81	27.06
3171	NYSE	NAT	Wed, Sep 1, 2010	26.51	26.87	26.42	26.75
3170	NYSE	NAT	Tue, Aug 31, 2010	26.49	26.76	26.21	26.24
3169	NYSE	NAT	Mon, Aug 30, 2010	27.11	27.17	26.48	26.50
3168	NYSE	NAT	Fri, Aug 27, 2010	26.66	27.31	26.37	27.19
3167	NYSE	NAT	Thu, Aug 26, 2010	26.90	27.20	26.56	26.61
3166	NYSE	NAT	Wed, Aug 25, 2010	26.62	26.79	26.37	26.73
3165	NYSE	NAT	Tue, Aug 24, 2010	27.03	27.18	26.42	26.87
3164	NYSE	NAT	Mon, Aug 23, 2010	27.80	27.85	27.26	27.32
3163	NYSE	NAT	Fri, Aug 20, 2010	27.91	27.91	27.44	27.72
3162	NYSE	NAT	Thu, Aug 19, 2010	28.49	28.49	27.79	27.93
3161	NYSE	NAT	Wed, Aug 18, 2010	28.66	28.83	28.26	28.62
3160	NYSE	NAT	Tue, Aug 17, 2010	29.17	29.44	29.04	29.39
3159	NYSE	NAT	Mon, Aug 16, 2010	28.25	29.09	28.25	28.89
3158	NYSE	NAT	Fri, Aug 13, 2010	28.54	28.79	28.30	28.33
3157	NYSE	NAT	Thu, Aug 12, 2010	28.21	28.64	28.10	28.56
3156	NYSE	NAT	Wed, Aug 11, 2010	28.62	28.81	28.25	28.58
3155	NYSE	NAT	Tue, Aug 10, 2010	29.32	29.37	28.75	29.05
3154	NYSE	NAT	Mon, Aug 9, 2010	29.59	29.59	29.19	29.39
3153	NYSE	NAT	Fri, Aug 6, 2010	29.35	29.67	28.96	29.49
3152	NYSE	NAT	Thu, Aug 5, 2010	28.98	29.12	28.79	28.96
3151	NYSE	NAT	Wed, Aug 4, 2010	28.93	29.19	28.74	29.11
3150	NYSE	NAT	Tue, Aug 3, 2010	28.65	29.10	28.30	28.82
3149	NYSE	NAT	Mon, Aug 2, 2010	28.81	29.10	28.47	28.64
3148	NYSE	NAT	Fri, Jul 30, 2010	28.48	28.52	28.10	28.43
3147	NYSE	NAT	Thu, Jul 29, 2010	28.84	29.11	28.11	28.59
3146	NYSE	NAT	Wed, Jul 28, 2010	29.19	29.33	28.51	28.69
3145	NYSE	NAT	Tue, Jul 27, 2010	29.44	29.65	29.07	29.34
3144	NYSE	NAT	Mon, Jul 26, 2010	28.50	29.29	28.36	29.23
3143	NYSE	NAT	Fri, Jul 23, 2010	27.89	28.43	27.85	28.43
3142	NYSE	NAT	Thu, Jul 22, 2010	28.01	28.20	27.75	28.03
3141	NYSE	NAT	Wed, Jul 21, 2010	28.15	28.15	27.39	27.57
3140	NYSE	NAT	Tue, Jul 20, 2010	27.11	27.95	27.01	27.92
3139	NYSE	NAT	Mon, Jul 19, 2010	27.53	27.81	27.08	27.38
3138	NYSE	NAT	Fri, Jul 16, 2010	27.54	27.64	27.26	27.36
3137	NYSE	NAT	Thu, Jul 15, 2010	28.36	28.52	27.34	27.60
3136	NYSE	NAT	Wed, Jul 14, 2010	28.26	28.73	28.03	28.38
3135	NYSE	NAT	Tue, Jul 13, 2010	27.99	28.34	27.77	28.23
3134	NYSE	NAT	Mon, Jul 12, 2010	28.19	28.25	27.62	27.68
3133	NYSE	NAT	Fri, Jul 9, 2010	27.62	28.07	27.62	28.00
3132	NYSE	NAT	Thu, Jul 8, 2010	27.73	27.98	27.29	27.69
3131	NYSE	NAT	Wed, Jul 7, 2010	27.02	27.60	26.74	27.55
3130	NYSE	NAT	Tue, Jul 6, 2010	27.33	27.79	26.68	26.89
3129	NYSE	NAT	Fri, Jul 2, 2010	27.39	27.70	26.92	27.06
3128	NYSE	NAT	Thu, Jul 1, 2010	27.75	27.96	27.03	27.29
3127	NYSE	NAT	Wed, Jun 30, 2010	28.41	28.73	27.78	27.84
3126	NYSE	NAT	Tue, Jun 29, 2010	28.64	28.99	28.12	28.32
3125	NYSE	NAT	Mon, Jun 28, 2010	29.08	29.63	29.06	29.10
3124	NYSE	NAT	Fri, Jun 25, 2010	28.60	29.27	28.60	29.26
3123	NYSE	NAT	Thu, Jun 24, 2010	28.66	28.83	28.31	28.42
3122	NYSE	NAT	Wed, Jun 23, 2010	28.76	28.92	28.42	28.73
3121	NYSE	NAT	Tue, Jun 22, 2010	29.38	29.49	28.69	28.88
3120	NYSE	NAT	Mon, Jun 21, 2010	29.86	29.88	29.18	29.35
3119	NYSE	NAT	Fri, Jun 18, 2010	29.48	29.57	29.15	29.48
3118	NYSE	NAT	Thu, Jun 17, 2010	29.74	29.74	29.11	29.34
3117	NYSE	NAT	Wed, Jun 16, 2010	29.54	29.83	29.27	29.51
3116	NYSE	NAT	Tue, Jun 15, 2010	29.56	29.83	29.32	29.75
3115	NYSE	NAT	Mon, Jun 14, 2010	28.61	29.34	28.60	29.03
3114	NYSE	NAT	Fri, Jun 11, 2010	27.97	28.64	27.87	28.64
3113	NYSE	NAT	Thu, Jun 10, 2010	27.62	28.45	27.62	28.28
3112	NYSE	NAT	Wed, Jun 9, 2010	27.83	28.10	27.20	27.33
3111	NYSE	NAT	Tue, Jun 8, 2010	27.30	27.64	26.77	27.33
3110	NYSE	NAT	Mon, Jun 7, 2010	28.04	28.22	27.22	27.28
3109	NYSE	NAT	Fri, Jun 4, 2010	28.93	28.93	27.82	28.01
3108	NYSE	NAT	Thu, Jun 3, 2010	28.83	29.10	28.42	28.96
3107	NYSE	NAT	Wed, Jun 2, 2010	27.92	28.96	27.92	28.96
3106	NYSE	NAT	Tue, Jun 1, 2010	28.18	28.75	27.75	27.75
3105	NYSE	NAT	Fri, May 28, 2010	28.67	28.97	27.85	28.15
3104	NYSE	NAT	Thu, May 27, 2010	28.07	28.69	27.90	28.69
3103	NYSE	NAT	Wed, May 26, 2010	27.78	28.03	27.60	27.64
3102	NYSE	NAT	Tue, May 25, 2010	26.95	27.57	26.68	27.53
3101	NYSE	NAT	Mon, May 24, 2010	28.24	28.24	27.49	27.49
3100	NYSE	NAT	Fri, May 21, 2010	27.09	28.13	26.91	27.85
3099	NYSE	NAT	Thu, May 20, 2010	28.08	28.34	27.51	27.52
3098	NYSE	NAT	Wed, May 19, 2010	29.03	29.31	28.31	28.84
3097	NYSE	NAT	Tue, May 18, 2010	30.00	30.00	29.30	29.39
3096	NYSE	NAT	Mon, May 17, 2010	30.16	30.16	28.77	29.44
3095	NYSE	NAT	Fri, May 14, 2010	30.61	31.00	29.88	30.46
3094	NYSE	NAT	Thu, May 13, 2010	30.21	30.53	29.91	30.39
3093	NYSE	NAT	Wed, May 12, 2010	30.11	30.23	29.79	30.20
3092	NYSE	NAT	Tue, May 11, 2010	29.23	30.08	29.23	29.57
3091	NYSE	NAT	Mon, May 10, 2010	29.69	29.74	28.89	29.42
3090	NYSE	NAT	Fri, May 7, 2010	28.66	28.78	27.35	28.03
3089	NYSE	NAT	Thu, May 6, 2010	30.02	30.17	27.15	28.81
3088	NYSE	NAT	Wed, May 5, 2010	30.48	30.66	29.79	30.20
3087	NYSE	NAT	Tue, May 4, 2010	31.35	31.52	30.83	31.09
3086	NYSE	NAT	Mon, May 3, 2010	31.06	32.11	31.06	31.75
3085	NYSE	NAT	Fri, Apr 30, 2010	30.78	31.20	30.60	30.97
3084	NYSE	NAT	Thu, Apr 29, 2010	31.11	31.28	30.68	30.80
3083	NYSE	NAT	Wed, Apr 28, 2010	31.13	31.25	30.76	30.89
3082	NYSE	NAT	Tue, Apr 27, 2010	31.39	31.48	30.69	31.02
3081	NYSE	NAT	Mon, Apr 26, 2010	31.64	31.80	31.48	31.50
3080	NYSE	NAT	Fri, Apr 23, 2010	31.49	31.76	31.32	31.76
3079	NYSE	NAT	Thu, Apr 22, 2010	31.21	31.56	30.98	31.56
3078	NYSE	NAT	Wed, Apr 21, 2010	31.37	31.56	31.22	31.49
3077	NYSE	NAT	Tue, Apr 20, 2010	31.08	31.57	31.08	31.41
3076	NYSE	NAT	Mon, Apr 19, 2010	30.92	31.07	30.66	31.04
3075	NYSE	NAT	Fri, Apr 16, 2010	31.34	31.57	30.66	31.12
3074	NYSE	NAT	Thu, Apr 15, 2010	31.43	31.90	31.23	31.38
3073	NYSE	NAT	Wed, Apr 14, 2010	31.30	31.70	31.08	31.61
3072	NYSE	NAT	Tue, Apr 13, 2010	31.13	31.32	30.94	31.25
3071	NYSE	NAT	Mon, Apr 12, 2010	31.19	31.45	31.15	31.22
3070	NYSE	NAT	Fri, Apr 9, 2010	31.09	31.54	30.83	31.32
3069	NYSE	NAT	Thu, Apr 8, 2010	30.56	30.77	30.29	30.74
3068	NYSE	NAT	Wed, Apr 7, 2010	31.04	31.18	30.53	30.77
3067	NYSE	NAT	Tue, Apr 6, 2010	31.07	31.23	30.83	31.17
3066	NYSE	NAT	Mon, Apr 5, 2010	30.65	31.22	30.48	31.06
3065	NYSE	NAT	Thu, Apr 1, 2010	30.12	30.71	30.12	30.47
3064	NYSE	NAT	Wed, Mar 31, 2010	30.00	30.19	29.84	30.00
3063	NYSE	NAT	Tue, Mar 30, 2010	29.82	30.27	29.69	30.15
3062	NYSE	NAT	Mon, Mar 29, 2010	29.72	29.88	29.66	29.71
3061	NYSE	NAT	Fri, Mar 26, 2010	29.55	29.91	29.44	29.66
3060	NYSE	NAT	Thu, Mar 25, 2010	30.00	30.13	29.52	29.54
3059	NYSE	NAT	Wed, Mar 24, 2010	29.95	30.63	29.74	29.92
3058	NYSE	NAT	Tue, Mar 23, 2010	29.63	30.02	29.63	29.98
3057	NYSE	NAT	Mon, Mar 22, 2010	29.63	29.73	29.24	29.66
3056	NYSE	NAT	Fri, Mar 19, 2010	30.09	30.19	29.51	29.71
3055	NYSE	NAT	Thu, Mar 18, 2010	30.04	30.28	30.03	30.19
3054	NYSE	NAT	Wed, Mar 17, 2010	30.03	30.11	29.93	30.04
3053	NYSE	NAT	Tue, Mar 16, 2010	29.81	30.12	29.80	30.08
3052	NYSE	NAT	Mon, Mar 15, 2010	29.96	30.12	29.64	29.92
3051	NYSE	NAT	Fri, Mar 12, 2010	30.17	30.28	30.03	30.16
3050	NYSE	NAT	Thu, Mar 11, 2010	30.45	30.53	29.93	30.04
3049	NYSE	NAT	Wed, Mar 10, 2010	30.38	30.80	30.15	30.47
3048	NYSE	NAT	Tue, Mar 9, 2010	29.87	30.40	29.67	30.06
3047	NYSE	NAT	Mon, Mar 8, 2010	28.98	29.80	28.74	29.60
3046	NYSE	NAT	Fri, Mar 5, 2010	28.64	28.71	28.42	28.48
3045	NYSE	NAT	Thu, Mar 4, 2010	28.56	28.91	28.40	28.59
3044	NYSE	NAT	Wed, Mar 3, 2010	28.66	28.76	28.53	28.64
3043	NYSE	NAT	Tue, Mar 2, 2010	28.74	28.74	28.50	28.51
3042	NYSE	NAT	Mon, Mar 1, 2010	28.79	29.05	28.60	28.68
3041	NYSE	NAT	Fri, Feb 26, 2010	28.84	28.89	28.45	28.80
3040	NYSE	NAT	Thu, Feb 25, 2010	28.39	28.76	28.21	28.74
3039	NYSE	NAT	Wed, Feb 24, 2010	28.55	28.83	28.40	28.57
3038	NYSE	NAT	Tue, Feb 23, 2010	28.91	28.93	28.25	28.40
3037	NYSE	NAT	Mon, Feb 22, 2010	29.42	29.49	28.96	29.04
3036	NYSE	NAT	Fri, Feb 19, 2010	29.00	29.42	28.96	29.21
3035	NYSE	NAT	Thu, Feb 18, 2010	29.12	29.30	29.05	29.28
3034	NYSE	NAT	Wed, Feb 17, 2010	29.34	29.39	29.01	29.20
3033	NYSE	NAT	Tue, Feb 16, 2010	29.23	29.26	28.84	29.26
3032	NYSE	NAT	Fri, Feb 12, 2010	27.86	28.63	27.75	28.63
3031	NYSE	NAT	Thu, Feb 11, 2010	28.13	28.63	27.92	28.56
3030	NYSE	NAT	Wed, Feb 10, 2010	27.99	28.14	27.57	28.12
3029	NYSE	NAT	Tue, Feb 9, 2010	27.87	28.22	27.63	27.86
3028	NYSE	NAT	Mon, Feb 8, 2010	28.13	28.17	27.56	27.64
3027	NYSE	NAT	Fri, Feb 5, 2010	28.43	28.43	27.32	28.11
3026	NYSE	NAT	Thu, Feb 4, 2010	29.23	29.24	28.34	28.39
3025	NYSE	NAT	Wed, Feb 3, 2010	29.45	29.64	29.24	29.34
3024	NYSE	NAT	Tue, Feb 2, 2010	29.67	29.79	29.12	29.47
3023	NYSE	NAT	Mon, Feb 1, 2010	29.58	29.73	28.70	29.59
3022	NYSE	NAT	Fri, Jan 29, 2010	30.14	30.46	29.41	29.41
3021	NYSE	NAT	Thu, Jan 28, 2010	30.54	30.54	29.77	29.97
3020	NYSE	NAT	Wed, Jan 27, 2010	30.18	30.58	30.05	30.47
3019	NYSE	NAT	Tue, Jan 26, 2010	30.12	30.61	30.05	30.25
3018	NYSE	NAT	Mon, Jan 25, 2010	30.24	30.43	29.93	30.18
3017	NYSE	NAT	Fri, Jan 22, 2010	30.18	30.38	29.95	30.04
3016	NYSE	NAT	Thu, Jan 21, 2010	33.44	33.70	32.28	32.36
3015	NYSE	NAT	Wed, Jan 20, 2010	33.58	33.58	33.11	33.44
3014	NYSE	NAT	Tue, Jan 19, 2010	33.29	33.70	33.24	33.70
3013	NYSE	NAT	Fri, Jan 15, 2010	33.13	33.36	32.51	32.96
3012	NYSE	NAT	Thu, Jan 14, 2010	33.39	33.69	33.21	33.24
3011	NYSE	NAT	Wed, Jan 13, 2010	33.22	33.60	33.21	33.39
3010	NYSE	NAT	Tue, Jan 12, 2010	33.24	33.67	33.09	33.28
3009	NYSE	NAT	Mon, Jan 11, 2010	33.18	33.89	32.97	33.67
3008	NYSE	NAT	Fri, Jan 8, 2010	31.82	32.45	31.78	32.37
3007	NYSE	NAT	Thu, Jan 7, 2010	31.84	32.12	31.34	32.11
3006	NYSE	NAT	Wed, Jan 6, 2010	30.59	31.97	30.51	31.75
3005	NYSE	NAT	Tue, Jan 5, 2010	30.42	30.52	30.18	30.42
3004	NYSE	NAT	Mon, Jan 4, 2010	29.91	30.36	29.86	30.35
3003	NYSE	NAT	Thu, Dec 31, 2009	29.83	29.83	29.73	29.74
3002	NYSE	NAT	Wed, Dec 30, 2009	29.80	29.94	29.75	29.81
3001	NYSE	NAT	Tue, Dec 29, 2009	29.96	30.08	29.86	29.88
3000	NYSE	NAT	Mon, Dec 28, 2009	30.25	30.42	29.93	30.09
2999	NYSE	NAT	Thu, Dec 24, 2009	30.44	30.59	30.35	30.40
2998	NYSE	NAT	Wed, Dec 23, 2009	30.23	30.65	30.10	30.41
2997	NYSE	NAT	Tue, Dec 22, 2009	30.33	30.47	30.08	30.21
2996	NYSE	NAT	Mon, Dec 21, 2009	30.45	30.81	30.23	30.32
2995	NYSE	NAT	Fri, Dec 18, 2009	30.85	30.88	30.25	30.58
2994	NYSE	NAT	Thu, Dec 17, 2009	30.86	30.86	30.53	30.63
2993	NYSE	NAT	Wed, Dec 16, 2009	30.89	31.13	30.68	30.93
2992	NYSE	NAT	Tue, Dec 15, 2009	31.11	31.36	30.61	30.73
2991	NYSE	NAT	Mon, Dec 14, 2009	31.06	31.23	30.98	31.14
2990	NYSE	NAT	Fri, Dec 11, 2009	30.83	31.16	30.73	31.05
2989	NYSE	NAT	Thu, Dec 10, 2009	30.66	30.98	30.44	30.59
2988	NYSE	NAT	Wed, Dec 9, 2009	30.83	30.90	30.43	30.66
2987	NYSE	NAT	Tue, Dec 8, 2009	31.25	31.40	30.83	30.90
2986	NYSE	NAT	Mon, Dec 7, 2009	32.16	32.17	31.37	31.53
2985	NYSE	NAT	Fri, Dec 4, 2009	32.52	32.94	31.84	32.37
2984	NYSE	NAT	Thu, Dec 3, 2009	32.52	32.71	32.31	32.63
2983	NYSE	NAT	Wed, Dec 2, 2009	32.11	32.70	32.06	32.53
2982	NYSE	NAT	Tue, Dec 1, 2009	31.73	32.10	31.73	32.06
2981	NYSE	NAT	Mon, Nov 30, 2009	31.88	32.02	31.42	31.69
2980	NYSE	NAT	Fri, Nov 27, 2009	31.43	32.29	31.22	31.68
2979	NYSE	NAT	Wed, Nov 25, 2009	32.27	32.46	32.08	32.40
2978	NYSE	NAT	Tue, Nov 24, 2009	31.97	32.25	31.29	32.22
2977	NYSE	NAT	Mon, Nov 23, 2009	31.84	32.14	30.83	30.98
2976	NYSE	NAT	Fri, Nov 20, 2009	31.21	31.80	31.21	31.71
2975	NYSE	NAT	Thu, Nov 19, 2009	31.72	31.89	31.22	31.62
2974	NYSE	NAT	Wed, Nov 18, 2009	31.25	32.03	31.12	32.03
2973	NYSE	NAT	Tue, Nov 17, 2009	30.03	30.14	29.74	29.97
2972	NYSE	NAT	Mon, Nov 16, 2009	29.95	30.23	29.86	30.21
2971	NYSE	NAT	Fri, Nov 13, 2009	29.64	29.91	29.34	29.78
2970	NYSE	NAT	Thu, Nov 12, 2009	29.27	30.17	29.27	29.47
2969	NYSE	NAT	Wed, Nov 11, 2009	29.09	29.46	28.61	29.38
2968	NYSE	NAT	Tue, Nov 10, 2009	28.83	29.24	28.79	28.99
2967	NYSE	NAT	Mon, Nov 9, 2009	27.70	29.09	27.66	28.80
2966	NYSE	NAT	Fri, Nov 6, 2009	28.46	28.73	28.26	28.42
2965	NYSE	NAT	Thu, Nov 5, 2009	28.42	28.71	28.31	28.61
2964	NYSE	NAT	Wed, Nov 4, 2009	28.15	28.60	28.09	28.28
2963	NYSE	NAT	Tue, Nov 3, 2009	27.77	28.30	27.75	28.14
2962	NYSE	NAT	Mon, Nov 2, 2009	28.14	28.48	27.60	28.05
2961	NYSE	NAT	Fri, Oct 30, 2009	28.62	28.75	28.01	28.05
2960	NYSE	NAT	Thu, Oct 29, 2009	27.94	28.88	27.94	28.88
2959	NYSE	NAT	Wed, Oct 28, 2009	28.50	28.65	27.70	27.90
2958	NYSE	NAT	Tue, Oct 27, 2009	28.65	28.99	28.26	28.51
2957	NYSE	NAT	Mon, Oct 26, 2009	29.08	29.44	28.60	28.74
2956	NYSE	NAT	Fri, Oct 23, 2009	29.73	29.74	29.08	29.20
2955	NYSE	NAT	Thu, Oct 22, 2009	29.30	29.67	29.10	29.54
2954	NYSE	NAT	Wed, Oct 21, 2009	29.60	29.84	29.28	29.42
2953	NYSE	NAT	Tue, Oct 20, 2009	29.74	29.85	29.35	29.73
2952	NYSE	NAT	Mon, Oct 19, 2009	29.69	29.79	29.44	29.74
2951	NYSE	NAT	Fri, Oct 16, 2009	29.68	29.84	29.41	29.69
2950	NYSE	NAT	Thu, Oct 15, 2009	29.09	29.84	29.04	29.79
2949	NYSE	NAT	Wed, Oct 14, 2009	29.28	29.33	29.02	29.33
2948	NYSE	NAT	Tue, Oct 13, 2009	28.94	29.08	28.79	28.93
2947	NYSE	NAT	Mon, Oct 12, 2009	29.08	29.23	28.84	29.00
2946	NYSE	NAT	Fri, Oct 9, 2009	29.13	29.36	28.86	29.07
2945	NYSE	NAT	Thu, Oct 8, 2009	29.24	29.30	28.76	29.23
2944	NYSE	NAT	Wed, Oct 7, 2009	29.14	29.17	28.85	29.07
2943	NYSE	NAT	Tue, Oct 6, 2009	28.26	29.27	28.26	29.15
2942	NYSE	NAT	Mon, Oct 5, 2009	28.25	28.48	28.05	28.17
2941	NYSE	NAT	Fri, Oct 2, 2009	28.70	28.84	28.11	28.25
2940	NYSE	NAT	Thu, Oct 1, 2009	29.48	29.48	28.80	28.81
2939	NYSE	NAT	Wed, Sep 30, 2009	29.11	29.40	28.76	29.32
2938	NYSE	NAT	Tue, Sep 29, 2009	29.10	29.29	28.94	29.11
2937	NYSE	NAT	Mon, Sep 28, 2009	29.24	29.34	29.03	29.09
2936	NYSE	NAT	Fri, Sep 25, 2009	29.57	29.57	29.07	29.18
2935	NYSE	NAT	Thu, Sep 24, 2009	29.52	29.86	29.22	29.56
2934	NYSE	NAT	Wed, Sep 23, 2009	29.49	29.64	29.38	29.48
2933	NYSE	NAT	Tue, Sep 22, 2009	29.53	29.68	29.35	29.50
2932	NYSE	NAT	Mon, Sep 21, 2009	29.79	29.83	29.34	29.41
2931	NYSE	NAT	Fri, Sep 18, 2009	29.72	30.03	29.49	30.01
2930	NYSE	NAT	Thu, Sep 17, 2009	29.72	29.95	29.54	29.64
2929	NYSE	NAT	Wed, Sep 16, 2009	29.50	29.74	29.40	29.74
2928	NYSE	NAT	Tue, Sep 15, 2009	29.50	29.69	29.34	29.49
2927	NYSE	NAT	Mon, Sep 14, 2009	29.54	29.67	29.15	29.67
2926	NYSE	NAT	Fri, Sep 11, 2009	29.29	29.86	29.26	29.59
2925	NYSE	NAT	Thu, Sep 10, 2009	29.33	29.59	29.08	29.30
2924	NYSE	NAT	Wed, Sep 9, 2009	29.09	29.50	28.99	29.33
2923	NYSE	NAT	Tue, Sep 8, 2009	29.03	29.19	28.86	28.99
2922	NYSE	NAT	Fri, Sep 4, 2009	28.95	29.06	28.67	28.89
2921	NYSE	NAT	Thu, Sep 3, 2009	28.89	29.12	28.75	28.91
2920	NYSE	NAT	Wed, Sep 2, 2009	29.20	29.29	28.75	28.78
2919	NYSE	NAT	Tue, Sep 1, 2009	29.56	29.79	29.20	29.27
2918	NYSE	NAT	Mon, Aug 31, 2009	29.73	29.73	29.49	29.51
2917	NYSE	NAT	Fri, Aug 28, 2009	30.37	30.38	29.79	29.88
2916	NYSE	NAT	Thu, Aug 27, 2009	29.76	30.23	29.67	30.10
2915	NYSE	NAT	Wed, Aug 26, 2009	29.84	29.91	29.73	29.86
2914	NYSE	NAT	Tue, Aug 25, 2009	30.04	30.08	29.79	29.91
2913	NYSE	NAT	Mon, Aug 24, 2009	29.96	30.02	29.75	30.02
2912	NYSE	NAT	Fri, Aug 21, 2009	29.65	30.06	29.60	29.98
2911	NYSE	NAT	Thu, Aug 20, 2009	29.53	29.71	29.34	29.61
2910	NYSE	NAT	Wed, Aug 19, 2009	29.95	29.95	29.35	29.46
2909	NYSE	NAT	Tue, Aug 18, 2009	30.23	30.93	29.77	30.40
2908	NYSE	NAT	Mon, Aug 17, 2009	29.70	30.29	29.60	29.75
2907	NYSE	NAT	Fri, Aug 14, 2009	30.23	30.97	30.08	30.68
2906	NYSE	NAT	Thu, Aug 13, 2009	30.17	30.43	29.79	30.43
2905	NYSE	NAT	Wed, Aug 12, 2009	29.62	30.22	29.44	30.01
2904	NYSE	NAT	Tue, Aug 11, 2009	29.46	29.89	29.39	29.61
2903	NYSE	NAT	Mon, Aug 10, 2009	29.26	29.69	29.25	29.68
2902	NYSE	NAT	Fri, Aug 7, 2009	30.48	30.63	29.54	29.67
2901	NYSE	NAT	Thu, Aug 6, 2009	31.03	31.51	30.48	30.56
2900	NYSE	NAT	Wed, Aug 5, 2009	30.95	31.01	30.58	30.89
2899	NYSE	NAT	Tue, Aug 4, 2009	30.92	31.21	30.56	31.01
2898	NYSE	NAT	Mon, Aug 3, 2009	30.73	31.23	30.57	30.97
2897	NYSE	NAT	Fri, Jul 31, 2009	30.76	30.82	30.33	30.40
2896	NYSE	NAT	Thu, Jul 30, 2009	30.99	31.12	30.48	30.70
2895	NYSE	NAT	Wed, Jul 29, 2009	31.04	31.05	30.68	30.73
2894	NYSE	NAT	Tue, Jul 28, 2009	31.47	31.47	30.94	31.19
2893	NYSE	NAT	Mon, Jul 27, 2009	31.46	31.72	31.18	31.70
2892	NYSE	NAT	Fri, Jul 24, 2009	30.98	31.33	30.81	31.28
2891	NYSE	NAT	Thu, Jul 23, 2009	30.93	31.39	30.30	31.06
2890	NYSE	NAT	Wed, Jul 22, 2009	30.48	30.93	30.20	30.48
2889	NYSE	NAT	Tue, Jul 21, 2009	31.50	31.50	30.23	30.53
2888	NYSE	NAT	Mon, Jul 20, 2009	31.53	31.70	31.18	31.24
2887	NYSE	NAT	Fri, Jul 17, 2009	31.57	31.65	31.09	31.09
2886	NYSE	NAT	Thu, Jul 16, 2009	31.54	31.72	30.88	31.53
2885	NYSE	NAT	Wed, Jul 15, 2009	30.82	31.62	30.77	31.58
2884	NYSE	NAT	Tue, Jul 14, 2009	30.32	30.70	29.89	30.45
2883	NYSE	NAT	Mon, Jul 13, 2009	30.26	30.37	29.64	30.21
2882	NYSE	NAT	Fri, Jul 10, 2009	29.90	30.28	29.70	30.23
2881	NYSE	NAT	Thu, Jul 9, 2009	30.10	30.27	29.57	29.97
2880	NYSE	NAT	Wed, Jul 8, 2009	30.29	30.29	29.09	29.65
2879	NYSE	NAT	Tue, Jul 7, 2009	30.55	30.71	30.13	30.29
2878	NYSE	NAT	Mon, Jul 6, 2009	30.83	30.83	29.89	30.44
2877	NYSE	NAT	Thu, Jul 2, 2009	31.34	31.34	30.85	31.10
2876	NYSE	NAT	Wed, Jul 1, 2009	31.65	32.04	31.36	31.59
2875	NYSE	NAT	Tue, Jun 30, 2009	31.64	31.92	31.24	31.54
2874	NYSE	NAT	Mon, Jun 29, 2009	32.06	32.07	31.15	31.71
2873	NYSE	NAT	Fri, Jun 26, 2009	31.64	32.05	30.99	32.05
2872	NYSE	NAT	Thu, Jun 25, 2009	30.89	31.76	30.73	31.76
2871	NYSE	NAT	Wed, Jun 24, 2009	30.73	31.48	30.51	30.97
2870	NYSE	NAT	Tue, Jun 23, 2009	31.03	31.12	29.76	30.42
2869	NYSE	NAT	Mon, Jun 22, 2009	31.91	31.91	30.85	30.93
2868	NYSE	NAT	Fri, Jun 19, 2009	32.48	32.72	31.52	31.90
2867	NYSE	NAT	Thu, Jun 18, 2009	31.77	32.19	31.22	32.16
2866	NYSE	NAT	Wed, Jun 17, 2009	31.81	32.14	31.02	31.71
2865	NYSE	NAT	Tue, Jun 16, 2009	32.22	32.30	31.72	31.73
2864	NYSE	NAT	Mon, Jun 15, 2009	32.80	32.80	31.84	32.11
2863	NYSE	NAT	Fri, Jun 12, 2009	33.11	33.27	32.61	33.08
2862	NYSE	NAT	Thu, Jun 11, 2009	33.98	34.09	33.30	33.36
2861	NYSE	NAT	Wed, Jun 10, 2009	33.84	34.30	33.06	33.74
2860	NYSE	NAT	Tue, Jun 9, 2009	33.28	33.45	32.44	33.32
2859	NYSE	NAT	Mon, Jun 8, 2009	32.37	32.61	31.92	32.32
2858	NYSE	NAT	Fri, Jun 5, 2009	33.07	33.24	32.37	32.54
2857	NYSE	NAT	Thu, Jun 4, 2009	32.98	33.34	32.38	32.89
2856	NYSE	NAT	Wed, Jun 3, 2009	33.28	33.32	32.32	32.71
2855	NYSE	NAT	Tue, Jun 2, 2009	34.15	34.15	33.27	33.46
2854	NYSE	NAT	Mon, Jun 1, 2009	33.57	34.37	33.40	34.16
2853	NYSE	NAT	Fri, May 29, 2009	32.90	33.30	32.72	33.24
2852	NYSE	NAT	Thu, May 28, 2009	32.62	32.95	31.84	32.72
2851	NYSE	NAT	Wed, May 27, 2009	32.64	33.26	31.88	32.24
2850	NYSE	NAT	Tue, May 26, 2009	31.93	32.66	31.77	32.64
2849	NYSE	NAT	Fri, May 22, 2009	32.26	32.65	31.68	31.72
2848	NYSE	NAT	Thu, May 21, 2009	32.36	32.56	31.72	32.13
2847	NYSE	NAT	Wed, May 20, 2009	33.21	33.73	32.71	32.84
2846	NYSE	NAT	Tue, May 19, 2009	33.50	33.58	32.71	33.21
2845	NYSE	NAT	Mon, May 18, 2009	33.70	33.70	32.02	33.60
2844	NYSE	NAT	Fri, May 15, 2009	33.20	33.86	33.17	33.61
2843	NYSE	NAT	Thu, May 14, 2009	31.51	32.66	30.99	32.66
2842	NYSE	NAT	Wed, May 13, 2009	32.13	32.80	31.43	31.56
2841	NYSE	NAT	Tue, May 12, 2009	36.42	36.62	35.19	35.76
2840	NYSE	NAT	Mon, May 11, 2009	36.18	36.41	34.81	36.18
2839	NYSE	NAT	Fri, May 8, 2009	36.77	36.83	35.94	36.62
2838	NYSE	NAT	Thu, May 7, 2009	37.52	37.52	35.44	35.90
2837	NYSE	NAT	Wed, May 6, 2009	36.45	36.91	35.48	36.40
2836	NYSE	NAT	Tue, May 5, 2009	36.17	37.76	34.69	36.07
2835	NYSE	NAT	Mon, May 4, 2009	34.22	36.17	34.22	36.17
2834	NYSE	NAT	Fri, May 1, 2009	32.21	35.34	32.16	33.85
2833	NYSE	NAT	Thu, Apr 30, 2009	31.73	32.21	31.70	32.18
2832	NYSE	NAT	Wed, Apr 29, 2009	31.09	31.50	30.66	31.32
2831	NYSE	NAT	Tue, Apr 28, 2009	30.47	31.11	30.03	30.44
2830	NYSE	NAT	Mon, Apr 27, 2009	29.74	30.12	29.32	29.38
2829	NYSE	NAT	Fri, Apr 24, 2009	29.83	30.38	29.51	30.23
2828	NYSE	NAT	Thu, Apr 23, 2009	30.31	30.31	29.74	29.97
2827	NYSE	NAT	Wed, Apr 22, 2009	30.72	30.73	29.93	30.31
2826	NYSE	NAT	Tue, Apr 21, 2009	28.78	30.59	28.74	30.47
2825	NYSE	NAT	Mon, Apr 20, 2009	29.87	29.87	28.78	28.84
2824	NYSE	NAT	Fri, Apr 17, 2009	29.78	30.13	29.51	29.92
2823	NYSE	NAT	Thu, Apr 16, 2009	29.58	29.93	29.13	29.81
2822	NYSE	NAT	Wed, Apr 15, 2009	29.40	29.96	28.97	29.22
2821	NYSE	NAT	Tue, Apr 14, 2009	29.99	30.33	29.51	29.52
2820	NYSE	NAT	Mon, Apr 13, 2009	29.74	30.73	29.57	30.24
2819	NYSE	NAT	Thu, Apr 9, 2009	30.21	30.53	29.54	29.69
2818	NYSE	NAT	Wed, Apr 8, 2009	29.29	29.51	28.55	29.51
2817	NYSE	NAT	Tue, Apr 7, 2009	29.53	29.88	28.75	29.00
2816	NYSE	NAT	Mon, Apr 6, 2009	30.33	30.37	29.34	30.00
2815	NYSE	NAT	Fri, Apr 3, 2009	30.39	31.40	30.08	30.61
2814	NYSE	NAT	Thu, Apr 2, 2009	29.58	30.23	29.53	30.18
2813	NYSE	NAT	Wed, Apr 1, 2009	28.30	29.44	28.25	29.08
2812	NYSE	NAT	Tue, Mar 31, 2009	29.38	29.80	28.37	29.04
2811	NYSE	NAT	Mon, Mar 30, 2009	28.84	29.24	27.80	29.11
2810	NYSE	NAT	Fri, Mar 27, 2009	30.94	30.94	29.45	29.52
2809	NYSE	NAT	Thu, Mar 26, 2009	30.83	31.26	30.33	31.26
2808	NYSE	NAT	Wed, Mar 25, 2009	30.12	30.32	29.00	30.32
2807	NYSE	NAT	Tue, Mar 24, 2009	29.67	30.09	28.54	28.81
2806	NYSE	NAT	Mon, Mar 23, 2009	27.39	28.68	26.90	28.68
2805	NYSE	NAT	Fri, Mar 20, 2009	28.15	28.56	26.43	26.55
2804	NYSE	NAT	Thu, Mar 19, 2009	26.86	28.62	26.86	28.04
2803	NYSE	NAT	Wed, Mar 18, 2009	26.06	26.64	24.99	26.31
2802	NYSE	NAT	Tue, Mar 17, 2009	25.35	25.80	24.56	25.80
2801	NYSE	NAT	Mon, Mar 16, 2009	25.04	25.70	24.78	24.87
2800	NYSE	NAT	Fri, Mar 13, 2009	25.51	25.76	24.20	24.75
2799	NYSE	NAT	Thu, Mar 12, 2009	24.45	24.99	23.76	24.83
2798	NYSE	NAT	Wed, Mar 11, 2009	24.80	25.02	23.79	24.26
2797	NYSE	NAT	Tue, Mar 10, 2009	24.52	25.27	23.68	24.59
2796	NYSE	NAT	Mon, Mar 9, 2009	23.40	24.18	23.05	23.22
2795	NYSE	NAT	Fri, Mar 6, 2009	23.90	24.71	23.29	24.00
2794	NYSE	NAT	Thu, Mar 5, 2009	25.14	25.28	23.55	23.82
2793	NYSE	NAT	Wed, Mar 4, 2009	24.14	26.01	24.01	25.72
2792	NYSE	NAT	Tue, Mar 3, 2009	23.45	23.88	22.05	22.66
2791	NYSE	NAT	Mon, Mar 2, 2009	24.78	24.86	22.92	23.29
2790	NYSE	NAT	Fri, Feb 27, 2009	25.76	26.12	25.08	25.31
2789	NYSE	NAT	Thu, Feb 26, 2009	27.03	27.35	25.95	26.06
2788	NYSE	NAT	Wed, Feb 25, 2009	27.54	27.57	26.47	26.86
2787	NYSE	NAT	Tue, Feb 24, 2009	26.38	27.68	25.81	27.45
2786	NYSE	NAT	Mon, Feb 23, 2009	28.45	28.74	26.40	26.43
2785	NYSE	NAT	Fri, Feb 20, 2009	27.86	29.09	27.86	28.57
2784	NYSE	NAT	Thu, Feb 19, 2009	28.74	29.36	28.50	28.73
2783	NYSE	NAT	Wed, Feb 18, 2009	28.85	29.04	27.80	28.42
2782	NYSE	NAT	Tue, Feb 17, 2009	29.72	29.72	28.74	28.74
2781	NYSE	NAT	Fri, Feb 13, 2009	30.03	30.46	28.00	29.93
2780	NYSE	NAT	Thu, Feb 12, 2009	29.73	29.73	27.98	29.36
2779	NYSE	NAT	Wed, Feb 11, 2009	28.60	29.44	28.51	28.96
2778	NYSE	NAT	Tue, Feb 10, 2009	29.88	30.43	28.07	28.58
2777	NYSE	NAT	Mon, Feb 9, 2009	29.53	29.98	29.45	29.86
2776	NYSE	NAT	Fri, Feb 6, 2009	28.50	29.42	28.50	29.19
2775	NYSE	NAT	Thu, Feb 5, 2009	28.25	28.84	27.77	28.39
2774	NYSE	NAT	Wed, Feb 4, 2009	28.37	29.34	28.08	28.18
2773	NYSE	NAT	Tue, Feb 3, 2009	27.53	28.50	27.53	28.28
2772	NYSE	NAT	Mon, Feb 2, 2009	28.39	28.39	27.26	27.51
2771	NYSE	NAT	Fri, Jan 30, 2009	29.90	30.23	28.25	28.41
2770	NYSE	NAT	Thu, Jan 29, 2009	28.50	29.80	28.46	29.54
2769	NYSE	NAT	Wed, Jan 28, 2009	28.50	29.16	28.35	29.09
2768	NYSE	NAT	Tue, Jan 27, 2009	28.63	29.33	28.11	28.17
2767	NYSE	NAT	Mon, Jan 26, 2009	29.14	30.06	28.26	28.56
2766	NYSE	NAT	Fri, Jan 23, 2009	28.40	29.40	27.98	29.08
2765	NYSE	NAT	Thu, Jan 22, 2009	30.23	30.23	28.55	28.83
2764	NYSE	NAT	Wed, Jan 21, 2009	29.94	31.05	29.74	30.63
2763	NYSE	NAT	Tue, Jan 20, 2009	30.68	31.14	29.47	29.65
2762	NYSE	NAT	Fri, Jan 16, 2009	31.88	32.25	30.19	31.00
2761	NYSE	NAT	Thu, Jan 15, 2009	32.39	32.41	30.11	31.59
2760	NYSE	NAT	Wed, Jan 14, 2009	32.41	33.01	31.73	32.23
2759	NYSE	NAT	Tue, Jan 13, 2009	32.30	32.65	31.72	32.42
2758	NYSE	NAT	Mon, Jan 12, 2009	32.46	32.70	31.72	31.93
2757	NYSE	NAT	Fri, Jan 9, 2009	32.89	33.29	32.28	32.28
2756	NYSE	NAT	Thu, Jan 8, 2009	32.15	32.59	31.98	32.41
2755	NYSE	NAT	Wed, Jan 7, 2009	35.97	36.15	34.70	35.18
2754	NYSE	NAT	Tue, Jan 6, 2009	37.17	37.72	35.98	36.44
2753	NYSE	NAT	Mon, Jan 5, 2009	34.23	36.84	34.23	36.53
2752	NYSE	NAT	Fri, Jan 2, 2009	33.50	34.41	33.45	34.09
2751	NYSE	NAT	Wed, Dec 31, 2008	33.15	33.60	32.71	33.45
2750	NYSE	NAT	Tue, Dec 30, 2008	33.21	33.21	32.46	33.21
2749	NYSE	NAT	Mon, Dec 29, 2008	33.34	33.44	32.47	33.00
2748	NYSE	NAT	Fri, Dec 26, 2008	33.02	33.70	32.63	33.25
2747	NYSE	NAT	Wed, Dec 24, 2008	32.51	33.03	32.04	32.66
2746	NYSE	NAT	Tue, Dec 23, 2008	32.21	33.05	31.90	32.50
2745	NYSE	NAT	Mon, Dec 22, 2008	33.80	33.80	30.93	31.03
2744	NYSE	NAT	Fri, Dec 19, 2008	34.84	35.04	33.70	34.14
2743	NYSE	NAT	Thu, Dec 18, 2008	35.68	35.68	33.90	34.37
2742	NYSE	NAT	Wed, Dec 17, 2008	34.29	35.56	34.20	35.06
2741	NYSE	NAT	Tue, Dec 16, 2008	33.64	34.74	33.26	34.27
2740	NYSE	NAT	Mon, Dec 15, 2008	33.59	33.59	31.59	32.48
2739	NYSE	NAT	Fri, Dec 12, 2008	30.78	32.96	30.73	32.91
2738	NYSE	NAT	Thu, Dec 11, 2008	34.58	35.19	31.72	32.36
2737	NYSE	NAT	Wed, Dec 10, 2008	32.87	34.19	32.36	33.82
2736	NYSE	NAT	Tue, Dec 9, 2008	32.20	33.21	31.72	32.25
2735	NYSE	NAT	Mon, Dec 8, 2008	31.25	32.26	31.04	31.91
2734	NYSE	NAT	Fri, Dec 5, 2008	29.06	31.31	27.31	30.69
2733	NYSE	NAT	Thu, Dec 4, 2008	28.68	29.70	28.12	29.43
2732	NYSE	NAT	Wed, Dec 3, 2008	26.56	28.74	26.15	28.50
2731	NYSE	NAT	Tue, Dec 2, 2008	26.70	27.10	25.53	26.83
2730	NYSE	NAT	Mon, Dec 1, 2008	28.30	28.30	25.98	26.13
2729	NYSE	NAT	Fri, Nov 28, 2008	28.26	28.97	27.89	28.97
2728	NYSE	NAT	Wed, Nov 26, 2008	27.27	29.04	27.26	28.47
2727	NYSE	NAT	Tue, Nov 25, 2008	28.59	28.59	26.41	27.98
2726	NYSE	NAT	Mon, Nov 24, 2008	26.72	27.68	26.09	27.16
2725	NYSE	NAT	Fri, Nov 21, 2008	27.18	27.18	23.82	25.56
2724	NYSE	NAT	Thu, Nov 20, 2008	28.52	28.52	24.88	26.08
2723	NYSE	NAT	Wed, Nov 19, 2008	31.07	31.07	28.73	29.29
2722	NYSE	NAT	Tue, Nov 18, 2008	34.72	34.78	31.96	32.99
2721	NYSE	NAT	Mon, Nov 17, 2008	33.59	35.00	33.25	33.99
2720	NYSE	NAT	Fri, Nov 14, 2008	33.37	33.69	32.71	33.02
2719	NYSE	NAT	Thu, Nov 13, 2008	32.22	33.85	31.00	33.85
2718	NYSE	NAT	Wed, Nov 12, 2008	32.06	32.53	30.93	31.99
2717	NYSE	NAT	Tue, Nov 11, 2008	30.53	31.66	29.98	30.35
2716	NYSE	NAT	Mon, Nov 10, 2008	32.70	33.70	29.78	30.87
2715	NYSE	NAT	Fri, Nov 7, 2008	29.84	33.16	29.12	31.03
2714	NYSE	NAT	Thu, Nov 6, 2008	29.74	29.88	27.87	28.65
2713	NYSE	NAT	Wed, Nov 5, 2008	31.72	31.80	30.08	30.17
2712	NYSE	NAT	Tue, Nov 4, 2008	31.50	32.63	31.22	31.87
2711	NYSE	NAT	Mon, Nov 3, 2008	30.27	31.44	29.80	30.45
2710	NYSE	NAT	Fri, Oct 31, 2008	28.83	29.73	28.18	29.39
2709	NYSE	NAT	Thu, Oct 30, 2008	27.90	28.84	27.51	28.83
2708	NYSE	NAT	Wed, Oct 29, 2008	27.22	28.50	26.30	27.16
2707	NYSE	NAT	Tue, Oct 28, 2008	25.11	26.26	23.79	26.26
2706	NYSE	NAT	Mon, Oct 27, 2008	24.94	25.78	24.28	24.59
2705	NYSE	NAT	Fri, Oct 24, 2008	25.27	26.70	24.49	25.21
2704	NYSE	NAT	Thu, Oct 23, 2008	26.96	28.20	25.37	26.60
2703	NYSE	NAT	Wed, Oct 22, 2008	27.77	28.25	26.33	27.09
2702	NYSE	NAT	Tue, Oct 21, 2008	28.73	29.14	27.75	28.33
2701	NYSE	NAT	Mon, Oct 20, 2008	28.87	28.87	27.65	28.45
2700	NYSE	NAT	Fri, Oct 17, 2008	26.91	29.69	26.76	27.27
2699	NYSE	NAT	Thu, Oct 16, 2008	25.82	27.76	25.22	27.68
2698	NYSE	NAT	Wed, Oct 15, 2008	28.00	28.00	25.71	25.71
2697	NYSE	NAT	Tue, Oct 14, 2008	29.58	30.23	27.06	28.11
2696	NYSE	NAT	Mon, Oct 13, 2008	25.77	27.99	25.77	27.99
2695	NYSE	NAT	Fri, Oct 10, 2008	22.81	24.58	21.81	24.35
2694	NYSE	NAT	Thu, Oct 9, 2008	27.49	29.13	24.28	24.31
2693	NYSE	NAT	Wed, Oct 8, 2008	24.79	28.23	23.79	27.09
2692	NYSE	NAT	Tue, Oct 7, 2008	28.54	29.24	25.79	25.96
2691	NYSE	NAT	Mon, Oct 6, 2008	28.50	28.72	22.31	28.09
2690	NYSE	NAT	Fri, Oct 3, 2008	30.73	31.95	29.34	29.40
2689	NYSE	NAT	Thu, Oct 2, 2008	31.82	32.04	29.89	30.36
2688	NYSE	NAT	Wed, Oct 1, 2008	31.76	32.09	30.84	32.07
2687	NYSE	NAT	Tue, Sep 30, 2008	30.55	32.31	29.93	31.78
2686	NYSE	NAT	Mon, Sep 29, 2008	32.79	32.79	29.74	30.48
2685	NYSE	NAT	Fri, Sep 26, 2008	32.93	33.62	32.56	33.16
2684	NYSE	NAT	Thu, Sep 25, 2008	34.44	34.69	33.80	34.36
2683	NYSE	NAT	Wed, Sep 24, 2008	33.73	34.47	33.32	34.36
2682	NYSE	NAT	Tue, Sep 23, 2008	33.38	34.10	32.07	33.75
2681	NYSE	NAT	Mon, Sep 22, 2008	34.70	35.01	33.05	34.02
2680	NYSE	NAT	Fri, Sep 19, 2008	32.72	35.60	31.22	35.50
2679	NYSE	NAT	Thu, Sep 18, 2008	28.54	31.52	28.10	31.51
2678	NYSE	NAT	Wed, Sep 17, 2008	29.74	30.37	28.02	28.06
2677	NYSE	NAT	Tue, Sep 16, 2008	29.79	30.57	29.44	29.93
2676	NYSE	NAT	Mon, Sep 15, 2008	32.40	32.40	29.79	30.00
2675	NYSE	NAT	Fri, Sep 12, 2008	31.69	33.01	31.69	32.58
2674	NYSE	NAT	Thu, Sep 11, 2008	31.41	32.76	30.73	32.01
2673	NYSE	NAT	Wed, Sep 10, 2008	30.97	31.37	29.74	31.27
2672	NYSE	NAT	Tue, Sep 9, 2008	32.29	32.29	28.25	28.66
2671	NYSE	NAT	Mon, Sep 8, 2008	33.46	33.80	32.06	32.29
2670	NYSE	NAT	Fri, Sep 5, 2008	34.19	34.19	31.84	32.92
2669	NYSE	NAT	Thu, Sep 4, 2008	34.01	34.69	33.25	33.87
2668	NYSE	NAT	Wed, Sep 3, 2008	34.11	35.38	33.70	34.21
2667	NYSE	NAT	Tue, Sep 2, 2008	35.33	35.33	33.70	34.10
2666	NYSE	NAT	Fri, Aug 29, 2008	35.47	35.67	34.69	34.87
2665	NYSE	NAT	Thu, Aug 28, 2008	34.87	35.51	34.69	35.47
2664	NYSE	NAT	Wed, Aug 27, 2008	33.69	34.84	33.66	34.73
2663	NYSE	NAT	Tue, Aug 26, 2008	33.16	33.58	32.78	33.29
2662	NYSE	NAT	Mon, Aug 25, 2008	33.61	34.86	32.81	33.02
2661	NYSE	NAT	Fri, Aug 22, 2008	34.63	34.69	33.55	33.68
2660	NYSE	NAT	Thu, Aug 21, 2008	35.75	36.03	33.58	34.44
2659	NYSE	NAT	Wed, Aug 20, 2008	36.68	37.11	34.89	35.88
2658	NYSE	NAT	Tue, Aug 19, 2008	36.81	37.07	35.35	36.65
2657	NYSE	NAT	Mon, Aug 18, 2008	39.84	39.89	38.62	38.84
2656	NYSE	NAT	Fri, Aug 15, 2008	39.69	40.00	38.54	39.02
2655	NYSE	NAT	Thu, Aug 14, 2008	38.47	39.50	38.47	39.44
2654	NYSE	NAT	Wed, Aug 13, 2008	37.89	38.66	37.30	38.48
2653	NYSE	NAT	Tue, Aug 12, 2008	36.97	37.44	36.78	37.25
2652	NYSE	NAT	Mon, Aug 11, 2008	36.92	37.90	36.88	36.93
2651	NYSE	NAT	Fri, Aug 8, 2008	36.95	37.37	36.34	36.78
2650	NYSE	NAT	Thu, Aug 7, 2008	38.85	38.85	37.17	37.90
2649	NYSE	NAT	Wed, Aug 6, 2008	37.23	39.54	36.74	38.85
2648	NYSE	NAT	Tue, Aug 5, 2008	37.02	37.63	36.59	37.23
2647	NYSE	NAT	Mon, Aug 4, 2008	38.65	38.65	36.32	37.01
2646	NYSE	NAT	Fri, Aug 1, 2008	39.71	39.77	38.39	38.52
2645	NYSE	NAT	Thu, Jul 31, 2008	39.32	39.96	38.87	39.57
2644	NYSE	NAT	Wed, Jul 30, 2008	39.57	40.52	39.15	39.64
2643	NYSE	NAT	Tue, Jul 29, 2008	41.03	41.03	39.47	39.89
2642	NYSE	NAT	Mon, Jul 28, 2008	40.13	41.02	39.40	40.47
2641	NYSE	NAT	Fri, Jul 25, 2008	39.69	40.52	39.14	39.79
2640	NYSE	NAT	Thu, Jul 24, 2008	40.64	40.64	39.35	39.45
2639	NYSE	NAT	Wed, Jul 23, 2008	40.12	40.79	39.49	40.56
2638	NYSE	NAT	Tue, Jul 22, 2008	38.43	39.40	38.11	39.38
2637	NYSE	NAT	Mon, Jul 21, 2008	38.58	38.86	38.10	38.73
2636	NYSE	NAT	Fri, Jul 18, 2008	38.28	38.87	37.81	38.36
2635	NYSE	NAT	Thu, Jul 17, 2008	38.23	38.61	37.10	38.23
2634	NYSE	NAT	Wed, Jul 16, 2008	37.57	38.11	37.07	38.06
2633	NYSE	NAT	Tue, Jul 15, 2008	37.96	38.15	36.54	37.49
2632	NYSE	NAT	Mon, Jul 14, 2008	38.16	38.38	37.57	38.01
2631	NYSE	NAT	Fri, Jul 11, 2008	37.66	38.09	36.67	38.09
2630	NYSE	NAT	Thu, Jul 10, 2008	37.04	37.51	36.09	36.80
2629	NYSE	NAT	Wed, Jul 9, 2008	37.00	37.49	36.18	36.33
2628	NYSE	NAT	Tue, Jul 8, 2008	35.78	36.92	35.19	36.92
2627	NYSE	NAT	Mon, Jul 7, 2008	36.66	37.32	35.10	35.62
2626	NYSE	NAT	Thu, Jul 3, 2008	37.14	37.26	34.90	35.25
2625	NYSE	NAT	Wed, Jul 2, 2008	39.53	39.53	37.53	37.74
2624	NYSE	NAT	Tue, Jul 1, 2008	38.48	39.75	37.25	39.63
2623	NYSE	NAT	Mon, Jun 30, 2008	38.15	39.08	37.67	38.48
2622	NYSE	NAT	Fri, Jun 27, 2008	36.77	37.63	36.67	37.63
2621	NYSE	NAT	Thu, Jun 26, 2008	36.51	37.36	36.51	36.92
2620	NYSE	NAT	Wed, Jun 25, 2008	36.63	37.38	36.31	37.02
2619	NYSE	NAT	Tue, Jun 24, 2008	37.92	37.92	36.57	36.57
2618	NYSE	NAT	Mon, Jun 23, 2008	38.80	39.15	37.83	38.30
2617	NYSE	NAT	Fri, Jun 20, 2008	39.50	39.73	38.56	38.67
2616	NYSE	NAT	Thu, Jun 19, 2008	39.86	39.90	39.04	39.29
2615	NYSE	NAT	Wed, Jun 18, 2008	39.45	39.87	38.85	39.75
2614	NYSE	NAT	Tue, Jun 17, 2008	38.77	40.09	38.67	39.43
2613	NYSE	NAT	Mon, Jun 16, 2008	37.45	38.40	37.43	38.26
2612	NYSE	NAT	Fri, Jun 13, 2008	36.00	37.52	35.82	37.43
2611	NYSE	NAT	Thu, Jun 12, 2008	35.19	36.38	35.18	35.80
2610	NYSE	NAT	Wed, Jun 11, 2008	36.29	36.29	34.20	35.05
2609	NYSE	NAT	Tue, Jun 10, 2008	37.23	37.47	36.00	36.23
2608	NYSE	NAT	Mon, Jun 9, 2008	38.10	38.26	37.15	37.58
2607	NYSE	NAT	Fri, Jun 6, 2008	37.87	38.51	37.74	37.74
2606	NYSE	NAT	Thu, Jun 5, 2008	37.57	38.25	37.57	38.25
2605	NYSE	NAT	Wed, Jun 4, 2008	37.37	38.24	37.17	37.54
2604	NYSE	NAT	Tue, Jun 3, 2008	37.74	37.91	37.19	37.64
2603	NYSE	NAT	Mon, Jun 2, 2008	37.95	38.31	37.27	37.67
2602	NYSE	NAT	Fri, May 30, 2008	37.75	38.16	37.57	37.92
2601	NYSE	NAT	Thu, May 29, 2008	37.91	38.33	37.71	37.81
2600	NYSE	NAT	Wed, May 28, 2008	38.46	38.66	37.58	37.95
2599	NYSE	NAT	Tue, May 27, 2008	37.48	38.16	37.34	37.97
2598	NYSE	NAT	Fri, May 23, 2008	38.96	38.96	36.75	37.71
2597	NYSE	NAT	Thu, May 22, 2008	39.89	39.90	38.53	39.07
2596	NYSE	NAT	Wed, May 21, 2008	41.19	41.23	39.16	39.49
2595	NYSE	NAT	Tue, May 20, 2008	41.38	41.63	40.45	41.50
2594	NYSE	NAT	Mon, May 19, 2008	39.64	40.54	39.35	40.00
2593	NYSE	NAT	Fri, May 16, 2008	38.88	39.15	38.66	39.11
2592	NYSE	NAT	Thu, May 15, 2008	38.65	38.82	38.16	38.56
2591	NYSE	NAT	Wed, May 14, 2008	38.65	38.81	37.80	38.16
2590	NYSE	NAT	Tue, May 13, 2008	38.16	38.64	37.91	38.17
2589	NYSE	NAT	Mon, May 12, 2008	39.62	40.48	38.95	39.73
2588	NYSE	NAT	Fri, May 9, 2008	38.21	39.14	38.16	38.96
2587	NYSE	NAT	Thu, May 8, 2008	37.10	37.10	36.26	36.32
2586	NYSE	NAT	Wed, May 7, 2008	37.07	37.62	36.62	36.66
2585	NYSE	NAT	Tue, May 6, 2008	35.83	37.21	35.73	37.10
2584	NYSE	NAT	Mon, May 5, 2008	35.68	36.18	35.19	35.68
2583	NYSE	NAT	Fri, May 2, 2008	34.12	35.59	34.12	35.41
2582	NYSE	NAT	Thu, May 1, 2008	33.46	34.44	33.41	34.10
2581	NYSE	NAT	Wed, Apr 30, 2008	33.32	33.82	33.01	33.42
2580	NYSE	NAT	Tue, Apr 29, 2008	34.03	34.20	33.15	33.28
2579	NYSE	NAT	Mon, Apr 28, 2008	33.31	34.24	33.31	34.22
2578	NYSE	NAT	Fri, Apr 25, 2008	34.04	34.04	33.27	33.34
2577	NYSE	NAT	Thu, Apr 24, 2008	33.80	34.13	32.77	33.96
2576	NYSE	NAT	Wed, Apr 23, 2008	33.92	34.04	33.55	33.76
2575	NYSE	NAT	Tue, Apr 22, 2008	33.60	34.09	33.50	33.84
2574	NYSE	NAT	Mon, Apr 21, 2008	33.25	34.13	32.81	33.95
2573	NYSE	NAT	Fri, Apr 18, 2008	32.71	33.59	32.56	33.58
2572	NYSE	NAT	Thu, Apr 17, 2008	31.84	32.70	31.84	32.56
2571	NYSE	NAT	Wed, Apr 16, 2008	31.72	32.05	31.58	32.05
2570	NYSE	NAT	Tue, Apr 15, 2008	31.47	31.59	31.32	31.55
2569	NYSE	NAT	Mon, Apr 14, 2008	30.29	31.34	30.29	31.24
2568	NYSE	NAT	Fri, Apr 11, 2008	31.44	31.45	30.48	30.57
2567	NYSE	NAT	Thu, Apr 10, 2008	30.55	31.16	30.46	31.03
2566	NYSE	NAT	Wed, Apr 9, 2008	30.71	30.98	30.43	30.43
2565	NYSE	NAT	Tue, Apr 8, 2008	30.48	30.76	30.24	30.71
2564	NYSE	NAT	Mon, Apr 7, 2008	30.71	30.71	30.23	30.41
2563	NYSE	NAT	Fri, Apr 4, 2008	30.71	30.71	30.08	30.34
2562	NYSE	NAT	Thu, Apr 3, 2008	30.13	30.57	29.86	30.20
2561	NYSE	NAT	Wed, Apr 2, 2008	29.82	30.71	29.50	30.49
2560	NYSE	NAT	Tue, Apr 1, 2008	27.65	28.83	27.65	28.72
2559	NYSE	NAT	Mon, Mar 31, 2008	27.77	28.04	27.56	27.75
2558	NYSE	NAT	Fri, Mar 28, 2008	28.55	28.94	28.14	28.28
2557	NYSE	NAT	Thu, Mar 27, 2008	28.50	29.12	28.35	28.63
2556	NYSE	NAT	Wed, Mar 26, 2008	28.25	28.44	27.82	28.34
2555	NYSE	NAT	Tue, Mar 25, 2008	28.27	29.01	28.25	28.33
2554	NYSE	NAT	Mon, Mar 24, 2008	27.67	29.03	27.51	28.74
2553	NYSE	NAT	Thu, Mar 20, 2008	25.92	27.95	25.92	27.66
2552	NYSE	NAT	Wed, Mar 19, 2008	27.80	27.80	26.01	26.01
2551	NYSE	NAT	Tue, Mar 18, 2008	25.94	27.37	25.94	27.37
2550	NYSE	NAT	Mon, Mar 17, 2008	25.29	27.01	25.29	25.85
2549	NYSE	NAT	Fri, Mar 14, 2008	27.35	27.35	25.59	26.07
2548	NYSE	NAT	Thu, Mar 13, 2008	25.77	27.43	25.68	27.34
2547	NYSE	NAT	Wed, Mar 12, 2008	26.67	26.91	25.88	25.99
2546	NYSE	NAT	Tue, Mar 11, 2008	25.68	26.76	25.68	26.74
2545	NYSE	NAT	Mon, Mar 10, 2008	26.37	26.74	25.38	25.54
2544	NYSE	NAT	Fri, Mar 7, 2008	26.75	27.07	26.06	26.34
2543	NYSE	NAT	Thu, Mar 6, 2008	27.44	27.74	26.66	26.76
2542	NYSE	NAT	Wed, Mar 5, 2008	27.41	27.60	26.76	27.54
2541	NYSE	NAT	Tue, Mar 4, 2008	27.60	27.73	26.44	26.99
2540	NYSE	NAT	Mon, Mar 3, 2008	28.16	28.16	27.13	27.60
2539	NYSE	NAT	Fri, Feb 29, 2008	28.98	28.98	27.85	28.09
2538	NYSE	NAT	Thu, Feb 28, 2008	29.12	29.48	28.81	29.08
2537	NYSE	NAT	Wed, Feb 27, 2008	29.18	29.49	28.75	29.42
2536	NYSE	NAT	Tue, Feb 26, 2008	29.00	29.72	28.75	29.41
2535	NYSE	NAT	Mon, Feb 25, 2008	29.36	29.53	28.65	29.23
2534	NYSE	NAT	Fri, Feb 22, 2008	29.62	29.65	28.56	29.29
2533	NYSE	NAT	Thu, Feb 21, 2008	30.63	30.73	29.49	29.62
2532	NYSE	NAT	Wed, Feb 20, 2008	30.06	30.73	29.86	30.67
2531	NYSE	NAT	Tue, Feb 19, 2008	30.75	31.01	30.09	30.60
2530	NYSE	NAT	Fri, Feb 15, 2008	30.91	31.20	29.85	30.02
2529	NYSE	NAT	Thu, Feb 14, 2008	30.29	31.20	30.24	30.93
2528	NYSE	NAT	Wed, Feb 13, 2008	29.65	30.51	29.33	30.29
2527	NYSE	NAT	Tue, Feb 12, 2008	30.56	30.56	29.06	29.31
2526	NYSE	NAT	Mon, Feb 11, 2008	30.41	31.14	30.03	30.75
2525	NYSE	NAT	Fri, Feb 8, 2008	30.54	31.17	30.18	30.41
2524	NYSE	NAT	Thu, Feb 7, 2008	29.64	30.85	29.64	30.57
2523	NYSE	NAT	Wed, Feb 6, 2008	29.99	30.78	29.76	29.86
2522	NYSE	NAT	Tue, Feb 5, 2008	30.73	30.83	29.71	29.71
2521	NYSE	NAT	Mon, Feb 4, 2008	30.93	31.32	30.46	30.82
2520	NYSE	NAT	Fri, Feb 1, 2008	31.21	31.70	30.40	31.07
2519	NYSE	NAT	Thu, Jan 31, 2008	29.74	31.25	29.74	30.95
2518	NYSE	NAT	Wed, Jan 30, 2008	30.20	30.85	29.78	29.84
2517	NYSE	NAT	Tue, Jan 29, 2008	29.71	30.48	29.49	29.80
2516	NYSE	NAT	Mon, Jan 28, 2008	28.72	29.74	28.72	29.56
2515	NYSE	NAT	Fri, Jan 25, 2008	28.86	29.73	28.80	29.02
2514	NYSE	NAT	Thu, Jan 24, 2008	28.54	29.12	28.25	28.51
2513	NYSE	NAT	Wed, Jan 23, 2008	26.99	28.60	26.99	28.32
2512	NYSE	NAT	Tue, Jan 22, 2008	25.53	28.25	25.52	28.01
2511	NYSE	NAT	Fri, Jan 18, 2008	27.81	28.60	27.37	28.28
2510	NYSE	NAT	Thu, Jan 17, 2008	29.54	29.92	27.76	27.80
2509	NYSE	NAT	Wed, Jan 16, 2008	29.74	30.23	28.58	29.59
2508	NYSE	NAT	Tue, Jan 15, 2008	30.73	30.73	29.74	29.91
2507	NYSE	NAT	Mon, Jan 14, 2008	31.51	31.71	30.98	31.26
2506	NYSE	NAT	Fri, Jan 11, 2008	30.28	31.91	30.27	31.24
2505	NYSE	NAT	Thu, Jan 10, 2008	30.28	31.30	29.85	30.00
2504	NYSE	NAT	Wed, Jan 9, 2008	30.74	31.42	29.84	30.76
2503	NYSE	NAT	Tue, Jan 8, 2008	31.72	31.89	30.87	31.01
2502	NYSE	NAT	Mon, Jan 7, 2008	32.75	32.75	31.22	31.60
2501	NYSE	NAT	Fri, Jan 4, 2008	32.59	33.23	32.41	32.50
2500	NYSE	NAT	Thu, Jan 3, 2008	33.55	34.00	32.79	33.08
2499	NYSE	NAT	Wed, Jan 2, 2008	32.54	33.64	32.54	33.14
2498	NYSE	NAT	Mon, Dec 31, 2007	33.02	33.38	32.22	32.53
2497	NYSE	NAT	Fri, Dec 28, 2007	33.96	34.45	33.38	33.38
2496	NYSE	NAT	Thu, Dec 27, 2007	34.44	34.50	33.41	33.92
2495	NYSE	NAT	Wed, Dec 26, 2007	34.98	34.98	34.46	34.52
2494	NYSE	NAT	Mon, Dec 24, 2007	35.19	35.67	34.69	34.80
2493	NYSE	NAT	Fri, Dec 21, 2007	35.37	36.17	34.67	35.53
2492	NYSE	NAT	Thu, Dec 20, 2007	36.13	36.13	33.73	34.87
2491	NYSE	NAT	Wed, Dec 19, 2007	34.73	36.39	34.40	36.04
2490	NYSE	NAT	Tue, Dec 18, 2007	34.01	35.18	33.87	34.86
2489	NYSE	NAT	Mon, Dec 17, 2007	33.30	34.94	33.27	33.66
2488	NYSE	NAT	Fri, Dec 14, 2007	33.94	34.64	33.10	33.56
2487	NYSE	NAT	Thu, Dec 13, 2007	34.00	34.54	32.82	34.00
2486	NYSE	NAT	Wed, Dec 12, 2007	34.21	35.04	33.65	34.32
2485	NYSE	NAT	Tue, Dec 11, 2007	34.61	35.00	33.46	33.59
2484	NYSE	NAT	Mon, Dec 10, 2007	34.92	35.44	34.25	34.49
2483	NYSE	NAT	Fri, Dec 7, 2007	32.37	34.45	32.37	34.36
2482	NYSE	NAT	Thu, Dec 6, 2007	31.69	32.71	31.69	31.92
2481	NYSE	NAT	Wed, Dec 5, 2007	31.99	32.40	31.49	31.82
2480	NYSE	NAT	Tue, Dec 4, 2007	31.97	31.97	31.38	31.57
2479	NYSE	NAT	Mon, Dec 3, 2007	33.85	34.04	31.72	31.89
2478	NYSE	NAT	Fri, Nov 30, 2007	35.60	35.70	32.84	33.91
2477	NYSE	NAT	Thu, Nov 29, 2007	35.17	35.88	34.83	35.03
2476	NYSE	NAT	Wed, Nov 28, 2007	33.44	35.17	33.44	35.00
2475	NYSE	NAT	Tue, Nov 27, 2007	33.12	33.73	32.75	33.30
2474	NYSE	NAT	Mon, Nov 26, 2007	32.34	34.69	32.34	33.08
2473	NYSE	NAT	Fri, Nov 23, 2007	30.29	32.86	30.29	32.61
2472	NYSE	NAT	Wed, Nov 21, 2007	30.35	30.35	29.24	29.76
2471	NYSE	NAT	Tue, Nov 20, 2007	30.96	31.32	29.54	30.47
2470	NYSE	NAT	Mon, Nov 19, 2007	30.83	31.43	30.07	31.26
2469	NYSE	NAT	Fri, Nov 16, 2007	32.88	32.88	31.41	32.08
2468	NYSE	NAT	Thu, Nov 15, 2007	32.17	32.73	31.75	32.53
2467	NYSE	NAT	Wed, Nov 14, 2007	33.37	33.70	32.21	32.49
2466	NYSE	NAT	Tue, Nov 13, 2007	32.44	33.70	32.44	33.70
2465	NYSE	NAT	Mon, Nov 12, 2007	33.06	33.23	32.46	32.69
2464	NYSE	NAT	Fri, Nov 9, 2007	34.20	34.43	33.56	34.39
2463	NYSE	NAT	Thu, Nov 8, 2007	33.45	34.45	33.29	34.45
2462	NYSE	NAT	Wed, Nov 7, 2007	35.67	35.67	33.10	33.62
2461	NYSE	NAT	Tue, Nov 6, 2007	36.98	36.98	35.67	35.67
2460	NYSE	NAT	Mon, Nov 5, 2007	36.38	37.47	36.18	36.60
2459	NYSE	NAT	Fri, Nov 2, 2007	38.18	38.18	37.22	37.58
2458	NYSE	NAT	Thu, Nov 1, 2007	38.06	38.06	37.17	37.58
2457	NYSE	NAT	Wed, Oct 31, 2007	36.88	38.41	36.87	38.35
2456	NYSE	NAT	Tue, Oct 30, 2007	37.56	37.74	36.58	36.79
2455	NYSE	NAT	Mon, Oct 29, 2007	36.73	37.50	36.71	37.47
2454	NYSE	NAT	Fri, Oct 26, 2007	35.93	36.61	35.92	36.61
2453	NYSE	NAT	Thu, Oct 25, 2007	35.63	36.38	35.57	35.68
2452	NYSE	NAT	Wed, Oct 24, 2007	36.18	36.37	34.77	35.62
2451	NYSE	NAT	Tue, Oct 23, 2007	36.55	37.38	36.18	36.26
2450	NYSE	NAT	Mon, Oct 22, 2007	36.67	38.41	35.69	36.56
2449	NYSE	NAT	Fri, Oct 19, 2007	37.47	38.24	37.04	37.14
2448	NYSE	NAT	Thu, Oct 18, 2007	37.57	37.75	37.08	37.52
2447	NYSE	NAT	Wed, Oct 17, 2007	37.20	37.65	36.82	37.42
2446	NYSE	NAT	Tue, Oct 16, 2007	37.64	37.67	36.80	37.03
2445	NYSE	NAT	Mon, Oct 15, 2007	38.32	38.32	37.43	37.69
2444	NYSE	NAT	Fri, Oct 12, 2007	38.59	39.04	38.32	38.32
2443	NYSE	NAT	Thu, Oct 11, 2007	37.76	38.84	37.73	38.79
2442	NYSE	NAT	Wed, Oct 10, 2007	37.91	38.07	37.67	37.97
2441	NYSE	NAT	Tue, Oct 9, 2007	38.15	38.61	37.86	38.02
2440	NYSE	NAT	Mon, Oct 8, 2007	38.76	39.04	37.76	37.77
2439	NYSE	NAT	Fri, Oct 5, 2007	38.79	38.91	38.36	38.76
2438	NYSE	NAT	Thu, Oct 4, 2007	38.95	39.01	38.26	38.53
2437	NYSE	NAT	Wed, Oct 3, 2007	39.15	39.25	38.06	39.10
2436	NYSE	NAT	Tue, Oct 2, 2007	40.01	40.58	39.02	39.15
2435	NYSE	NAT	Mon, Oct 1, 2007	39.53	39.87	39.20	39.69
2434	NYSE	NAT	Fri, Sep 28, 2007	38.56	39.85	38.56	38.89
2433	NYSE	NAT	Thu, Sep 27, 2007	38.55	38.61	38.16	38.26
2432	NYSE	NAT	Wed, Sep 26, 2007	38.61	38.87	38.41	38.47
2431	NYSE	NAT	Tue, Sep 25, 2007	38.20	38.50	37.67	38.28
2430	NYSE	NAT	Mon, Sep 24, 2007	38.76	38.90	38.41	38.52
2429	NYSE	NAT	Fri, Sep 21, 2007	38.66	38.81	37.99	38.58
2428	NYSE	NAT	Thu, Sep 20, 2007	37.36	38.20	37.23	38.20
2427	NYSE	NAT	Wed, Sep 19, 2007	38.01	38.16	37.02	37.69
2426	NYSE	NAT	Tue, Sep 18, 2007	36.16	37.80	36.16	37.80
2425	NYSE	NAT	Mon, Sep 17, 2007	36.53	36.80	35.79	35.94
2424	NYSE	NAT	Fri, Sep 14, 2007	36.17	36.91	35.99	36.91
2423	NYSE	NAT	Thu, Sep 13, 2007	36.43	36.86	36.14	36.18
2422	NYSE	NAT	Wed, Sep 12, 2007	36.29	36.49	35.78	36.22
2421	NYSE	NAT	Tue, Sep 11, 2007	35.04	36.61	34.94	36.44
2420	NYSE	NAT	Mon, Sep 10, 2007	35.83	35.83	34.33	34.93
2419	NYSE	NAT	Fri, Sep 7, 2007	35.71	35.88	35.32	35.57
2418	NYSE	NAT	Thu, Sep 6, 2007	37.42	37.42	35.88	36.15
2417	NYSE	NAT	Wed, Sep 5, 2007	37.77	38.01	37.18	37.65
2416	NYSE	NAT	Tue, Sep 4, 2007	36.68	38.01	36.67	37.90
2415	NYSE	NAT	Fri, Aug 31, 2007	37.16	37.41	36.39	36.56
2414	NYSE	NAT	Thu, Aug 30, 2007	36.55	37.32	35.98	36.40
2413	NYSE	NAT	Wed, Aug 29, 2007	36.48	36.57	35.53	36.36
2412	NYSE	NAT	Tue, Aug 28, 2007	37.02	37.18	35.92	36.41
2411	NYSE	NAT	Mon, Aug 27, 2007	37.18	37.21	36.85	37.07
2410	NYSE	NAT	Fri, Aug 24, 2007	36.33	37.16	36.18	37.15
2409	NYSE	NAT	Thu, Aug 23, 2007	37.41	37.42	36.18	36.33
2408	NYSE	NAT	Wed, Aug 22, 2007	36.82	37.42	36.69	37.17
2407	NYSE	NAT	Tue, Aug 21, 2007	36.23	36.57	35.91	36.52
2406	NYSE	NAT	Mon, Aug 20, 2007	36.67	36.67	35.68	36.18
2405	NYSE	NAT	Fri, Aug 17, 2007	35.09	37.17	33.11	36.26
2404	NYSE	NAT	Thu, Aug 16, 2007	34.69	35.60	31.72	34.99
2403	NYSE	NAT	Wed, Aug 15, 2007	36.13	37.42	34.52	34.83
2402	NYSE	NAT	Tue, Aug 14, 2007	39.12	39.15	36.85	37.09
2401	NYSE	NAT	Mon, Aug 13, 2007	38.71	39.15	38.52	38.72
2400	NYSE	NAT	Fri, Aug 10, 2007	36.67	38.66	36.67	38.60
2399	NYSE	NAT	Thu, Aug 9, 2007	38.65	39.49	37.21	38.36
2398	NYSE	NAT	Wed, Aug 8, 2007	37.91	39.18	37.48	38.40
2397	NYSE	NAT	Tue, Aug 7, 2007	35.94	37.17	35.68	37.03
2396	NYSE	NAT	Mon, Aug 6, 2007	37.90	38.02	33.47	36.13
2395	NYSE	NAT	Fri, Aug 3, 2007	39.05	39.19	37.90	37.90
2394	NYSE	NAT	Thu, Aug 2, 2007	39.18	39.42	38.54	38.89
2393	NYSE	NAT	Wed, Aug 1, 2007	39.70	39.70	38.64	39.18
2392	NYSE	NAT	Tue, Jul 31, 2007	38.96	40.12	38.66	39.35
2391	NYSE	NAT	Mon, Jul 30, 2007	38.87	39.10	38.06	39.04
2390	NYSE	NAT	Fri, Jul 27, 2007	38.52	39.01	37.68	38.31
2389	NYSE	NAT	Thu, Jul 26, 2007	39.65	39.75	37.91	38.25
2388	NYSE	NAT	Wed, Jul 25, 2007	40.84	41.17	39.11	40.14
2387	NYSE	NAT	Tue, Jul 24, 2007	41.43	41.63	40.54	40.64
2386	NYSE	NAT	Mon, Jul 23, 2007	41.38	41.57	41.13	41.37
2385	NYSE	NAT	Fri, Jul 20, 2007	40.84	41.19	40.69	41.13
2384	NYSE	NAT	Thu, Jul 19, 2007	43.10	43.11	42.25	42.47
2383	NYSE	NAT	Wed, Jul 18, 2007	42.51	43.02	42.05	42.37
2382	NYSE	NAT	Tue, Jul 17, 2007	41.90	42.55	41.71	41.75
2381	NYSE	NAT	Mon, Jul 16, 2007	43.61	43.77	41.81	41.90
2380	NYSE	NAT	Fri, Jul 13, 2007	43.49	43.54	42.72	43.54
2379	NYSE	NAT	Thu, Jul 12, 2007	43.34	43.51	42.78	43.13
2378	NYSE	NAT	Wed, Jul 11, 2007	42.80	43.61	42.49	43.61
2377	NYSE	NAT	Tue, Jul 10, 2007	43.07	43.12	42.46	42.54
2376	NYSE	NAT	Mon, Jul 9, 2007	42.76	43.32	42.73	43.06
2375	NYSE	NAT	Fri, Jul 6, 2007	42.53	43.03	41.93	42.76
2374	NYSE	NAT	Thu, Jul 5, 2007	42.52	43.28	42.42	42.52
2373	NYSE	NAT	Tue, Jul 3, 2007	41.77	43.07	41.63	42.44
2372	NYSE	NAT	Mon, Jul 2, 2007	41.08	41.88	40.53	41.34
2371	NYSE	NAT	Fri, Jun 29, 2007	40.73	40.88	40.30	40.48
2370	NYSE	NAT	Thu, Jun 28, 2007	40.36	40.64	39.97	40.53
2369	NYSE	NAT	Wed, Jun 27, 2007	39.55	40.27	38.75	40.27
2368	NYSE	NAT	Tue, Jun 26, 2007	40.02	40.06	38.86	39.55
2367	NYSE	NAT	Mon, Jun 25, 2007	40.10	40.11	38.90	39.99
2366	NYSE	NAT	Fri, Jun 22, 2007	39.28	40.20	38.56	40.20
2365	NYSE	NAT	Thu, Jun 21, 2007	39.53	39.55	38.89	38.90
2364	NYSE	NAT	Wed, Jun 20, 2007	39.61	39.69	39.15	39.32
2363	NYSE	NAT	Tue, Jun 19, 2007	39.00	39.25	38.67	39.25
2362	NYSE	NAT	Mon, Jun 18, 2007	38.66	38.84	38.59	38.79
2361	NYSE	NAT	Fri, Jun 15, 2007	38.90	38.90	38.47	38.65
2360	NYSE	NAT	Thu, Jun 14, 2007	38.56	39.03	38.26	38.65
2359	NYSE	NAT	Wed, Jun 13, 2007	38.33	38.65	37.82	38.56
2358	NYSE	NAT	Tue, Jun 12, 2007	38.17	38.28	37.47	37.64
2357	NYSE	NAT	Mon, Jun 11, 2007	37.91	38.66	37.72	38.23
2356	NYSE	NAT	Fri, Jun 8, 2007	38.41	38.41	37.40	37.61
2355	NYSE	NAT	Thu, Jun 7, 2007	38.81	38.81	37.15	37.15
2354	NYSE	NAT	Wed, Jun 6, 2007	39.41	39.47	38.50	38.79
2353	NYSE	NAT	Tue, Jun 5, 2007	39.83	39.83	39.32	39.40
2352	NYSE	NAT	Mon, Jun 4, 2007	39.45	39.79	39.35	39.49
2351	NYSE	NAT	Fri, Jun 1, 2007	39.43	39.60	39.14	39.32
2350	NYSE	NAT	Thu, May 31, 2007	38.50	39.34	38.50	39.09
2349	NYSE	NAT	Wed, May 30, 2007	37.52	38.41	37.17	38.41
2348	NYSE	NAT	Tue, May 29, 2007	37.40	37.89	37.29	37.76
2347	NYSE	NAT	Fri, May 25, 2007	37.45	37.54	36.98	37.20
2346	NYSE	NAT	Thu, May 24, 2007	37.71	38.04	36.67	37.00
2345	NYSE	NAT	Wed, May 23, 2007	38.06	38.06	37.54	37.67
2344	NYSE	NAT	Tue, May 22, 2007	38.36	38.41	37.81	37.90
2343	NYSE	NAT	Mon, May 21, 2007	38.06	39.08	37.47	38.20
2342	NYSE	NAT	Fri, May 18, 2007	39.65	39.65	39.26	39.34
2341	NYSE	NAT	Thu, May 17, 2007	40.06	40.07	39.28	39.65
2340	NYSE	NAT	Wed, May 16, 2007	40.58	40.58	39.73	39.83
2339	NYSE	NAT	Tue, May 15, 2007	40.62	40.62	39.95	40.21
2338	NYSE	NAT	Mon, May 14, 2007	39.85	40.88	39.41	39.94
2337	NYSE	NAT	Fri, May 11, 2007	39.53	39.53	39.07	39.34
2336	NYSE	NAT	Thu, May 10, 2007	39.39	39.48	38.51	38.84
2335	NYSE	NAT	Wed, May 9, 2007	38.64	39.19	38.36	39.19
2334	NYSE	NAT	Tue, May 8, 2007	38.14	38.47	38.06	38.46
2333	NYSE	NAT	Mon, May 7, 2007	38.30	38.30	37.86	37.90
2332	NYSE	NAT	Fri, May 4, 2007	37.67	38.39	37.58	37.80
2331	NYSE	NAT	Thu, May 3, 2007	37.02	37.85	36.88	37.72
2330	NYSE	NAT	Wed, May 2, 2007	37.56	38.16	36.77	36.97
2329	NYSE	NAT	Tue, May 1, 2007	37.17	38.14	36.59	37.91
2328	NYSE	NAT	Mon, Apr 30, 2007	37.94	38.88	37.94	38.18
2327	NYSE	NAT	Fri, Apr 27, 2007	37.79	38.12	37.64	38.12
2326	NYSE	NAT	Thu, Apr 26, 2007	37.68	37.83	37.35	37.78
2325	NYSE	NAT	Wed, Apr 25, 2007	37.57	38.20	37.55	37.75
2324	NYSE	NAT	Tue, Apr 24, 2007	39.19	39.19	37.27	37.59
2323	NYSE	NAT	Mon, Apr 23, 2007	37.66	37.91	37.17	37.42
2322	NYSE	NAT	Fri, Apr 20, 2007	37.31	37.65	37.10	37.42
2321	NYSE	NAT	Thu, Apr 19, 2007	37.60	37.62	37.02	37.25
2320	NYSE	NAT	Wed, Apr 18, 2007	37.19	37.66	36.97	37.40
2319	NYSE	NAT	Tue, Apr 17, 2007	36.20	36.94	36.18	36.94
2318	NYSE	NAT	Mon, Apr 16, 2007	36.16	36.16	35.94	36.04
2317	NYSE	NAT	Fri, Apr 13, 2007	35.70	35.93	35.48	35.85
2316	NYSE	NAT	Thu, Apr 12, 2007	35.71	35.78	35.49	35.66
2315	NYSE	NAT	Wed, Apr 11, 2007	36.18	36.18	35.50	35.81
2314	NYSE	NAT	Tue, Apr 10, 2007	36.01	36.08	35.73	35.98
2313	NYSE	NAT	Mon, Apr 9, 2007	35.96	36.23	35.66	35.92
2312	NYSE	NAT	Thu, Apr 5, 2007	35.92	35.98	35.55	35.80
2311	NYSE	NAT	Wed, Apr 4, 2007	35.86	36.00	35.63	35.85
2310	NYSE	NAT	Tue, Apr 3, 2007	36.27	36.27	35.49	35.68
2309	NYSE	NAT	Mon, Apr 2, 2007	35.82	36.28	35.48	35.83
2308	NYSE	NAT	Fri, Mar 30, 2007	36.17	36.66	35.73	35.93
2307	NYSE	NAT	Thu, Mar 29, 2007	35.88	36.11	35.62	36.11
2306	NYSE	NAT	Wed, Mar 28, 2007	35.58	35.88	35.19	35.88
2305	NYSE	NAT	Tue, Mar 27, 2007	35.76	35.76	34.96	35.42
2304	NYSE	NAT	Mon, Mar 26, 2007	35.21	35.76	34.83	35.76
2303	NYSE	NAT	Fri, Mar 23, 2007	34.93	35.29	34.53	34.56
2302	NYSE	NAT	Thu, Mar 22, 2007	34.60	34.87	34.41	34.72
2301	NYSE	NAT	Wed, Mar 21, 2007	34.28	34.67	34.17	34.60
2300	NYSE	NAT	Tue, Mar 20, 2007	33.84	34.44	33.83	34.08
2299	NYSE	NAT	Mon, Mar 19, 2007	33.70	33.94	33.53	33.87
2298	NYSE	NAT	Fri, Mar 16, 2007	33.67	33.67	33.20	33.49
2297	NYSE	NAT	Thu, Mar 15, 2007	33.26	33.26	32.68	33.19
2296	NYSE	NAT	Wed, Mar 14, 2007	33.01	33.55	32.44	33.19
2295	NYSE	NAT	Tue, Mar 13, 2007	34.14	34.15	32.97	33.27
2294	NYSE	NAT	Mon, Mar 12, 2007	34.19	34.19	33.82	34.06
2293	NYSE	NAT	Fri, Mar 9, 2007	33.62	34.10	33.57	33.80
2292	NYSE	NAT	Thu, Mar 8, 2007	33.50	33.74	33.32	33.67
2291	NYSE	NAT	Wed, Mar 7, 2007	33.01	33.24	32.71	33.08
2290	NYSE	NAT	Tue, Mar 6, 2007	32.11	32.95	32.11	32.69
2289	NYSE	NAT	Mon, Mar 5, 2007	32.47	32.71	31.78	32.02
2288	NYSE	NAT	Fri, Mar 2, 2007	33.19	33.55	32.73	33.04
2287	NYSE	NAT	Thu, Mar 1, 2007	32.73	33.48	32.08	32.94
2286	NYSE	NAT	Wed, Feb 28, 2007	32.44	33.67	32.44	32.73
2285	NYSE	NAT	Tue, Feb 27, 2007	32.72	33.24	32.21	32.38
2284	NYSE	NAT	Mon, Feb 26, 2007	33.92	34.10	33.17	33.19
2283	NYSE	NAT	Fri, Feb 23, 2007	35.00	35.00	33.94	34.39
2282	NYSE	NAT	Thu, Feb 22, 2007	34.94	35.34	34.75	35.04
2281	NYSE	NAT	Wed, Feb 21, 2007	35.28	35.46	34.44	34.69
2280	NYSE	NAT	Tue, Feb 20, 2007	35.91	35.91	35.19	35.47
2279	NYSE	NAT	Fri, Feb 16, 2007	35.67	36.45	35.67	36.18
2278	NYSE	NAT	Thu, Feb 15, 2007	35.34	36.13	35.13	35.68
2277	NYSE	NAT	Wed, Feb 14, 2007	35.68	36.67	34.91	35.13
2276	NYSE	NAT	Tue, Feb 13, 2007	36.82	37.20	36.82	37.20
2275	NYSE	NAT	Mon, Feb 12, 2007	36.91	37.17	36.59	36.81
2274	NYSE	NAT	Fri, Feb 9, 2007	36.66	36.93	36.54	36.77
2273	NYSE	NAT	Thu, Feb 8, 2007	36.44	36.67	36.22	36.54
2272	NYSE	NAT	Wed, Feb 7, 2007	36.41	36.67	36.28	36.62
2271	NYSE	NAT	Tue, Feb 6, 2007	36.25	36.48	35.88	36.04
2270	NYSE	NAT	Mon, Feb 5, 2007	35.93	36.08	35.86	36.07
2269	NYSE	NAT	Fri, Feb 2, 2007	35.68	35.93	35.53	35.69
2268	NYSE	NAT	Thu, Feb 1, 2007	35.33	35.68	35.19	35.52
2267	NYSE	NAT	Wed, Jan 31, 2007	35.09	35.44	35.04	35.12
2266	NYSE	NAT	Tue, Jan 30, 2007	34.88	35.44	34.85	35.41
2265	NYSE	NAT	Mon, Jan 29, 2007	34.55	35.09	34.44	34.88
2264	NYSE	NAT	Fri, Jan 26, 2007	34.18	34.36	33.95	34.36
2263	NYSE	NAT	Thu, Jan 25, 2007	34.28	34.44	33.95	34.10
2262	NYSE	NAT	Wed, Jan 24, 2007	34.49	34.59	34.20	34.25
2261	NYSE	NAT	Tue, Jan 23, 2007	33.80	34.44	33.72	34.41
2260	NYSE	NAT	Mon, Jan 22, 2007	33.85	33.91	33.50	33.80
2259	NYSE	NAT	Fri, Jan 19, 2007	33.48	33.75	33.30	33.65
2258	NYSE	NAT	Thu, Jan 18, 2007	33.70	33.70	33.30	33.35
2257	NYSE	NAT	Wed, Jan 17, 2007	33.07	33.51	32.96	33.50
2256	NYSE	NAT	Tue, Jan 16, 2007	32.99	33.29	32.72	33.07
2255	NYSE	NAT	Fri, Jan 12, 2007	32.54	32.88	32.49	32.88
2254	NYSE	NAT	Thu, Jan 11, 2007	32.59	32.59	32.26	32.41
2253	NYSE	NAT	Wed, Jan 10, 2007	32.31	32.57	31.98	32.55
2252	NYSE	NAT	Tue, Jan 9, 2007	32.82	32.86	31.98	32.45
2251	NYSE	NAT	Mon, Jan 8, 2007	32.71	33.11	32.66	32.87
2250	NYSE	NAT	Fri, Jan 5, 2007	33.21	33.38	32.52	32.71
2249	NYSE	NAT	Thu, Jan 4, 2007	33.62	33.69	33.21	33.45
2248	NYSE	NAT	Wed, Jan 3, 2007	33.94	33.95	33.32	33.61
2247	NYSE	NAT	Fri, Dec 29, 2006	34.11	34.25	33.85	33.85
2246	NYSE	NAT	Thu, Dec 28, 2006	34.30	34.35	34.10	34.17
2245	NYSE	NAT	Wed, Dec 27, 2006	33.97	34.23	33.97	34.20
2244	NYSE	NAT	Tue, Dec 26, 2006	33.32	33.91	33.30	33.82
2243	NYSE	NAT	Fri, Dec 22, 2006	33.25	33.56	33.21	33.44
2242	NYSE	NAT	Thu, Dec 21, 2006	33.41	33.69	33.22	33.29
2241	NYSE	NAT	Wed, Dec 20, 2006	33.36	33.67	33.40	33.40
2240	NYSE	NAT	Tue, Dec 19, 2006	33.70	33.82	33.39	33.47
2239	NYSE	NAT	Mon, Dec 18, 2006	34.14	34.15	33.70	33.70
2238	NYSE	NAT	Fri, Dec 15, 2006	34.00	34.17	33.80	33.89
2237	NYSE	NAT	Thu, Dec 14, 2006	33.65	34.20	33.65	33.94
2236	NYSE	NAT	Wed, Dec 13, 2006	33.72	33.90	33.45	33.65
2235	NYSE	NAT	Tue, Dec 12, 2006	34.20	34.20	33.74	33.75
2234	NYSE	NAT	Mon, Dec 11, 2006	33.83	34.19	33.73	34.15
2233	NYSE	NAT	Fri, Dec 8, 2006	33.60	33.79	33.45	33.70
2232	NYSE	NAT	Thu, Dec 7, 2006	33.79	33.79	33.45	33.47
2231	NYSE	NAT	Wed, Dec 6, 2006	33.68	34.03	33.44	33.79
2230	NYSE	NAT	Tue, Dec 5, 2006	33.12	33.54	33.06	33.50
2229	NYSE	NAT	Mon, Dec 4, 2006	33.10	33.35	32.71	33.09
2228	NYSE	NAT	Fri, Dec 1, 2006	32.80	32.92	32.46	32.91
2227	NYSE	NAT	Thu, Nov 30, 2006	32.68	32.71	32.14	32.15
2226	NYSE	NAT	Wed, Nov 29, 2006	32.56	32.65	32.26	32.39
2225	NYSE	NAT	Tue, Nov 28, 2006	33.06	33.07	31.82	32.08
2224	NYSE	NAT	Mon, Nov 27, 2006	33.35	33.37	33.03	33.06
2223	NYSE	NAT	Fri, Nov 24, 2006	32.82	33.40	32.81	33.21
2222	NYSE	NAT	Wed, Nov 22, 2006	32.61	32.81	32.31	32.81
2221	NYSE	NAT	Tue, Nov 21, 2006	32.81	32.84	32.39	32.61
2220	NYSE	NAT	Mon, Nov 20, 2006	33.11	33.11	32.63	32.75
2219	NYSE	NAT	Fri, Nov 17, 2006	32.70	32.95	32.51	32.95
2218	NYSE	NAT	Thu, Nov 16, 2006	32.58	32.97	32.57	32.67
2217	NYSE	NAT	Wed, Nov 15, 2006	32.66	32.77	32.40	32.67
2216	NYSE	NAT	Tue, Nov 14, 2006	33.21	33.21	32.56	32.80
2215	NYSE	NAT	Mon, Nov 13, 2006	32.53	33.16	32.21	32.89
2214	NYSE	NAT	Fri, Nov 10, 2006	34.20	34.22	33.80	33.84
2213	NYSE	NAT	Thu, Nov 9, 2006	34.64	34.64	34.16	34.19
2212	NYSE	NAT	Wed, Nov 8, 2006	34.95	34.95	34.10	34.56
2211	NYSE	NAT	Tue, Nov 7, 2006	35.80	35.80	34.99	35.00
2210	NYSE	NAT	Mon, Nov 6, 2006	35.68	36.08	35.04	35.46
2209	NYSE	NAT	Fri, Nov 3, 2006	35.44	35.68	34.68	35.42
2208	NYSE	NAT	Thu, Nov 2, 2006	34.30	34.60	34.05	34.30
2207	NYSE	NAT	Wed, Nov 1, 2006	34.57	34.57	34.11	34.27
2206	NYSE	NAT	Tue, Oct 31, 2006	34.15	34.41	34.15	34.25
2205	NYSE	NAT	Mon, Oct 30, 2006	34.14	34.28	33.95	34.10
2204	NYSE	NAT	Fri, Oct 27, 2006	34.24	34.47	33.95	34.14
2203	NYSE	NAT	Thu, Oct 26, 2006	34.49	34.59	33.93	34.21
2202	NYSE	NAT	Wed, Oct 25, 2006	33.94	34.43	33.86	34.42
2201	NYSE	NAT	Tue, Oct 24, 2006	33.48	33.92	33.42	33.79
2200	NYSE	NAT	Mon, Oct 23, 2006	33.30	33.80	33.17	33.30
2199	NYSE	NAT	Fri, Oct 20, 2006	33.24	33.29	32.85	33.17
2198	NYSE	NAT	Thu, Oct 19, 2006	32.76	33.36	32.52	33.24
2197	NYSE	NAT	Wed, Oct 18, 2006	32.71	32.71	32.45	32.51
2196	NYSE	NAT	Tue, Oct 17, 2006	32.69	32.70	32.27	32.54
2195	NYSE	NAT	Mon, Oct 16, 2006	32.95	32.95	32.41	32.53
2194	NYSE	NAT	Fri, Oct 13, 2006	32.21	32.75	31.92	32.57
2193	NYSE	NAT	Thu, Oct 12, 2006	32.11	32.13	31.88	31.97
2192	NYSE	NAT	Wed, Oct 11, 2006	32.21	32.21	31.80	32.00
2191	NYSE	NAT	Tue, Oct 10, 2006	32.19	32.21	31.97	32.19
2190	NYSE	NAT	Mon, Oct 9, 2006	31.77	32.18	31.72	31.95
2189	NYSE	NAT	Fri, Oct 6, 2006	31.77	32.19	30.73	31.75
2188	NYSE	NAT	Thu, Oct 5, 2006	32.52	33.07	32.11	32.29
2187	NYSE	NAT	Wed, Oct 4, 2006	33.66	34.00	32.51	32.60
2186	NYSE	NAT	Tue, Oct 3, 2006	34.57	34.58	33.58	33.65
2185	NYSE	NAT	Mon, Oct 2, 2006	34.49	34.79	34.15	34.59
2184	NYSE	NAT	Fri, Sep 29, 2006	34.41	34.67	34.00	34.49
2183	NYSE	NAT	Thu, Sep 28, 2006	34.56	34.74	34.26	34.36
2182	NYSE	NAT	Wed, Sep 27, 2006	35.19	35.19	33.96	34.56
2181	NYSE	NAT	Tue, Sep 26, 2006	33.68	34.28	33.59	33.96
2180	NYSE	NAT	Mon, Sep 25, 2006	33.56	33.75	32.74	33.68
2179	NYSE	NAT	Fri, Sep 22, 2006	33.81	33.81	32.72	33.56
2178	NYSE	NAT	Thu, Sep 21, 2006	33.95	34.47	33.77	33.81
2177	NYSE	NAT	Wed, Sep 20, 2006	35.49	35.53	33.95	33.96
2176	NYSE	NAT	Tue, Sep 19, 2006	34.82	35.44	34.82	35.44
2175	NYSE	NAT	Mon, Sep 18, 2006	34.59	35.01	34.44	34.81
2174	NYSE	NAT	Fri, Sep 15, 2006	33.91	34.22	33.80	34.18
2173	NYSE	NAT	Thu, Sep 14, 2006	33.70	33.90	33.54	33.87
2172	NYSE	NAT	Wed, Sep 13, 2006	33.06	34.10	32.96	33.51
2171	NYSE	NAT	Tue, Sep 12, 2006	32.12	33.35	32.11	32.92
2170	NYSE	NAT	Mon, Sep 11, 2006	33.25	33.30	31.67	32.11
2169	NYSE	NAT	Fri, Sep 8, 2006	35.78	35.91	33.89	34.00
2168	NYSE	NAT	Thu, Sep 7, 2006	35.78	35.83	35.19	35.69
2167	NYSE	NAT	Wed, Sep 6, 2006	36.47	36.57	35.83	35.83
2166	NYSE	NAT	Tue, Sep 5, 2006	36.01	36.53	36.01	36.48
2165	NYSE	NAT	Fri, Sep 1, 2006	35.91	36.28	35.88	36.01
2164	NYSE	NAT	Thu, Aug 31, 2006	36.08	36.32	35.46	35.85
2163	NYSE	NAT	Wed, Aug 30, 2006	36.77	36.97	35.72	35.85
2162	NYSE	NAT	Tue, Aug 29, 2006	36.69	36.73	36.25	36.58
2161	NYSE	NAT	Mon, Aug 28, 2006	36.56	36.99	36.28	36.61
2160	NYSE	NAT	Fri, Aug 25, 2006	36.67	37.27	36.33	36.51
2159	NYSE	NAT	Thu, Aug 24, 2006	35.94	36.67	35.94	36.61
2158	NYSE	NAT	Wed, Aug 23, 2006	36.65	36.66	35.90	35.90
2157	NYSE	NAT	Tue, Aug 22, 2006	36.13	36.58	35.93	36.43
2156	NYSE	NAT	Mon, Aug 21, 2006	35.08	36.18	35.06	36.18
2155	NYSE	NAT	Fri, Aug 18, 2006	36.41	36.41	34.69	35.08
2154	NYSE	NAT	Thu, Aug 17, 2006	38.10	38.10	35.98	36.51
2153	NYSE	NAT	Wed, Aug 16, 2006	37.91	38.16	37.47	38.01
2152	NYSE	NAT	Tue, Aug 15, 2006	37.52	38.15	37.49	37.78
2151	NYSE	NAT	Mon, Aug 14, 2006	38.66	38.94	36.85	37.46
2150	NYSE	NAT	Fri, Aug 11, 2006	39.85	40.56	39.79	40.41
2149	NYSE	NAT	Thu, Aug 10, 2006	41.09	41.29	39.35	39.61
2148	NYSE	NAT	Wed, Aug 9, 2006	40.99	41.33	40.67	41.09
2147	NYSE	NAT	Tue, Aug 8, 2006	40.34	40.83	40.32	40.64
2146	NYSE	NAT	Mon, Aug 7, 2006	39.90	40.27	39.65	40.11
2145	NYSE	NAT	Fri, Aug 4, 2006	39.87	40.44	39.26	39.55
2144	NYSE	NAT	Thu, Aug 3, 2006	38.93	39.89	38.86	39.71
2143	NYSE	NAT	Wed, Aug 2, 2006	38.95	39.54	38.95	39.06
2142	NYSE	NAT	Tue, Aug 1, 2006	38.76	38.93	38.52	38.82
2141	NYSE	NAT	Mon, Jul 31, 2006	37.86	38.68	37.68	38.51
2140	NYSE	NAT	Fri, Jul 28, 2006	37.21	38.12	37.21	37.68
2139	NYSE	NAT	Thu, Jul 27, 2006	37.15	37.98	37.15	37.21
2138	NYSE	NAT	Wed, Jul 26, 2006	37.42	37.53	36.89	37.08
2137	NYSE	NAT	Tue, Jul 25, 2006	37.67	37.68	35.68	36.93
2136	NYSE	NAT	Mon, Jul 24, 2006	38.12	38.15	37.73	37.79
2135	NYSE	NAT	Fri, Jul 21, 2006	38.06	38.11	37.01	37.79
2134	NYSE	NAT	Thu, Jul 20, 2006	38.26	38.66	37.73	37.83
2133	NYSE	NAT	Wed, Jul 19, 2006	37.42	38.26	37.19	38.18
2132	NYSE	NAT	Tue, Jul 18, 2006	36.87	37.42	36.79	37.34
2131	NYSE	NAT	Mon, Jul 17, 2006	36.32	37.42	36.19	36.78
2130	NYSE	NAT	Fri, Jul 14, 2006	37.47	37.67	35.44	36.57
2129	NYSE	NAT	Thu, Jul 13, 2006	38.29	38.40	37.18	37.66
2128	NYSE	NAT	Wed, Jul 12, 2006	37.54	38.66	37.54	38.29
2127	NYSE	NAT	Tue, Jul 11, 2006	37.88	37.92	36.87	37.54
2126	NYSE	NAT	Mon, Jul 10, 2006	38.06	38.90	37.47	37.81
2125	NYSE	NAT	Fri, Jul 7, 2006	37.14	38.09	37.11	38.06
2124	NYSE	NAT	Thu, Jul 6, 2006	36.58	37.46	36.43	37.02
2123	NYSE	NAT	Wed, Jul 5, 2006	36.68	36.87	35.70	36.50
2122	NYSE	NAT	Mon, Jul 3, 2006	36.28	36.66	36.18	36.66
2121	NYSE	NAT	Fri, Jun 30, 2006	36.12	36.28	35.78	36.13
2120	NYSE	NAT	Thu, Jun 29, 2006	35.88	36.28	35.49	36.12
2119	NYSE	NAT	Wed, Jun 28, 2006	35.39	35.95	35.39	35.74
2118	NYSE	NAT	Tue, Jun 27, 2006	35.42	35.83	35.29	35.49
2117	NYSE	NAT	Mon, Jun 26, 2006	34.98	35.39	34.95	35.27
2116	NYSE	NAT	Fri, Jun 23, 2006	35.09	35.33	34.69	34.98
2115	NYSE	NAT	Thu, Jun 22, 2006	34.85	35.29	34.74	35.24
2114	NYSE	NAT	Wed, Jun 21, 2006	34.79	34.94	34.63	34.67
2113	NYSE	NAT	Tue, Jun 20, 2006	34.57	34.92	34.36	34.38
2112	NYSE	NAT	Mon, Jun 19, 2006	33.76	34.56	33.25	34.31
2111	NYSE	NAT	Fri, Jun 16, 2006	33.61	34.48	33.50	33.76
2110	NYSE	NAT	Thu, Jun 15, 2006	32.56	33.25	32.46	33.09
2109	NYSE	NAT	Wed, Jun 14, 2006	31.42	31.97	31.11	31.61
2108	NYSE	NAT	Tue, Jun 13, 2006	31.11	31.72	30.53	31.42
2107	NYSE	NAT	Mon, Jun 12, 2006	31.98	32.10	31.16	31.23
2106	NYSE	NAT	Fri, Jun 9, 2006	31.87	32.21	31.87	31.98
2105	NYSE	NAT	Thu, Jun 8, 2006	31.67	31.79	30.73	31.71
2104	NYSE	NAT	Wed, Jun 7, 2006	31.57	32.10	31.51	31.53
2103	NYSE	NAT	Tue, Jun 6, 2006	32.21	32.27	31.47	31.47
2102	NYSE	NAT	Mon, Jun 5, 2006	32.36	32.81	32.36	32.38
2101	NYSE	NAT	Fri, Jun 2, 2006	32.21	32.35	32.00	32.23
2100	NYSE	NAT	Thu, Jun 1, 2006	31.72	31.86	31.32	31.62
2099	NYSE	NAT	Wed, May 31, 2006	30.88	31.12	30.70	30.83
2098	NYSE	NAT	Tue, May 30, 2006	30.93	30.94	30.59	30.65
2097	NYSE	NAT	Fri, May 26, 2006	30.13	30.66	30.00	30.48
2096	NYSE	NAT	Thu, May 25, 2006	29.59	30.37	29.59	29.92
2095	NYSE	NAT	Wed, May 24, 2006	29.79	29.95	29.39	29.49
2094	NYSE	NAT	Tue, May 23, 2006	30.33	30.50	29.84	29.84
2093	NYSE	NAT	Mon, May 22, 2006	30.13	30.13	29.49	30.08
2092	NYSE	NAT	Fri, May 19, 2006	31.34	31.59	30.18	30.18
2091	NYSE	NAT	Thu, May 18, 2006	30.53	31.39	30.52	31.21
2090	NYSE	NAT	Wed, May 17, 2006	31.25	31.31	30.43	30.53
2089	NYSE	NAT	Tue, May 16, 2006	30.77	31.22	30.73	31.22
2088	NYSE	NAT	Mon, May 15, 2006	31.22	31.30	30.60	30.77
2087	NYSE	NAT	Fri, May 12, 2006	31.81	31.86	31.23	31.72
2086	NYSE	NAT	Thu, May 11, 2006	31.82	32.41	31.82	32.06
2085	NYSE	NAT	Wed, May 10, 2006	32.61	32.71	31.64	32.17
2084	NYSE	NAT	Tue, May 9, 2006	35.04	35.04	34.25	34.34
2083	NYSE	NAT	Mon, May 8, 2006	34.75	35.11	34.69	34.73
2082	NYSE	NAT	Fri, May 5, 2006	35.67	35.67	34.84	34.97
2081	NYSE	NAT	Thu, May 4, 2006	34.73	35.14	34.44	35.14
2080	NYSE	NAT	Wed, May 3, 2006	34.47	34.48	33.90	34.44
2079	NYSE	NAT	Tue, May 2, 2006	34.57	34.81	33.15	34.47
2078	NYSE	NAT	Mon, May 1, 2006	33.13	33.15	32.60	32.79
2077	NYSE	NAT	Fri, Apr 28, 2006	32.21	33.24	32.16	33.11
2076	NYSE	NAT	Thu, Apr 27, 2006	33.28	33.30	31.82	32.16
2075	NYSE	NAT	Wed, Apr 26, 2006	33.00	33.30	32.71	33.28
2074	NYSE	NAT	Tue, Apr 25, 2006	33.30	33.30	32.27	32.70
2073	NYSE	NAT	Mon, Apr 24, 2006	31.92	32.69	31.82	32.62
2072	NYSE	NAT	Fri, Apr 21, 2006	30.53	30.97	30.00	30.93
2071	NYSE	NAT	Thu, Apr 20, 2006	29.74	30.23	29.74	30.21
2070	NYSE	NAT	Wed, Apr 19, 2006	28.84	29.72	28.78	29.69
2069	NYSE	NAT	Tue, Apr 18, 2006	28.31	28.84	28.31	28.65
2068	NYSE	NAT	Mon, Apr 17, 2006	28.92	29.04	28.31	28.31
2067	NYSE	NAT	Thu, Apr 13, 2006	28.99	28.99	28.74	28.91
2066	NYSE	NAT	Wed, Apr 12, 2006	29.05	29.19	28.79	28.81
2065	NYSE	NAT	Tue, Apr 11, 2006	29.11	29.39	28.96	29.24
2064	NYSE	NAT	Mon, Apr 10, 2006	28.74	29.02	28.74	28.94
2063	NYSE	NAT	Fri, Apr 7, 2006	28.63	28.84	28.50	28.77
2062	NYSE	NAT	Thu, Apr 6, 2006	28.64	28.92	28.45	28.62
2061	NYSE	NAT	Wed, Apr 5, 2006	28.37	28.79	28.25	28.64
2060	NYSE	NAT	Tue, Apr 4, 2006	28.60	28.74	28.30	28.37
2059	NYSE	NAT	Mon, Apr 3, 2006	28.85	29.04	28.48	28.55
2058	NYSE	NAT	Fri, Mar 31, 2006	28.79	28.83	28.58	28.61
2057	NYSE	NAT	Thu, Mar 30, 2006	29.18	29.19	28.70	28.70
2056	NYSE	NAT	Wed, Mar 29, 2006	28.74	29.19	28.70	29.03
2055	NYSE	NAT	Tue, Mar 28, 2006	29.10	29.21	28.73	28.73
2054	NYSE	NAT	Mon, Mar 27, 2006	28.70	29.11	28.55	28.94
2053	NYSE	NAT	Fri, Mar 24, 2006	28.43	28.73	28.25	28.52
2052	NYSE	NAT	Thu, Mar 23, 2006	28.65	28.67	28.25	28.33
2051	NYSE	NAT	Wed, Mar 22, 2006	28.67	28.73	28.48	28.50
2050	NYSE	NAT	Tue, Mar 21, 2006	28.60	28.70	28.26	28.49
2049	NYSE	NAT	Mon, Mar 20, 2006	28.25	28.56	28.24	28.45
2048	NYSE	NAT	Fri, Mar 17, 2006	28.10	28.28	27.94	28.09
2047	NYSE	NAT	Thu, Mar 16, 2006	28.11	28.25	28.06	28.10
2046	NYSE	NAT	Wed, Mar 15, 2006	28.25	28.27	28.05	28.14
2045	NYSE	NAT	Tue, Mar 14, 2006	28.25	28.25	28.05	28.14
2044	NYSE	NAT	Mon, Mar 13, 2006	28.25	28.25	27.95	28.23
2043	NYSE	NAT	Fri, Mar 10, 2006	28.22	28.25	27.78	28.07
2042	NYSE	NAT	Thu, Mar 9, 2006	28.05	28.29	27.65	27.74
2041	NYSE	NAT	Wed, Mar 8, 2006	29.79	29.79	28.58	28.70
2040	NYSE	NAT	Tue, Mar 7, 2006	30.14	30.15	29.66	29.75
2039	NYSE	NAT	Mon, Mar 6, 2006	30.78	30.78	29.92	30.14
2038	NYSE	NAT	Fri, Mar 3, 2006	29.72	30.84	29.56	30.53
2037	NYSE	NAT	Thu, Mar 2, 2006	29.74	29.84	29.68	29.71
2036	NYSE	NAT	Wed, Mar 1, 2006	29.74	29.84	29.56	29.62
2035	NYSE	NAT	Tue, Feb 28, 2006	30.73	30.73	29.54	29.66
2034	NYSE	NAT	Mon, Feb 27, 2006	30.23	30.73	29.92	30.73
2033	NYSE	NAT	Fri, Feb 24, 2006	31.95	32.26	30.97	31.19
2032	NYSE	NAT	Thu, Feb 23, 2006	32.31	32.46	31.89	31.95
2031	NYSE	NAT	Wed, Feb 22, 2006	32.46	32.70	32.11	32.51
2030	NYSE	NAT	Tue, Feb 21, 2006	32.46	33.05	32.46	32.49
2029	NYSE	NAT	Fri, Feb 17, 2006	32.91	32.91	32.46	32.53
2028	NYSE	NAT	Thu, Feb 16, 2006	32.76	33.05	32.59	32.96
2027	NYSE	NAT	Wed, Feb 15, 2006	32.75	32.98	32.26	32.66
2026	NYSE	NAT	Tue, Feb 14, 2006	33.06	33.06	31.72	32.61
2025	NYSE	NAT	Mon, Feb 13, 2006	35.40	35.67	34.39	34.45
2024	NYSE	NAT	Fri, Feb 10, 2006	35.68	35.68	33.96	35.37
2023	NYSE	NAT	Thu, Feb 9, 2006	36.03	36.60	35.73	35.97
2022	NYSE	NAT	Wed, Feb 8, 2006	36.18	36.18	35.29	35.66
2021	NYSE	NAT	Tue, Feb 7, 2006	35.53	36.49	34.89	35.29
2020	NYSE	NAT	Mon, Feb 6, 2006	32.66	34.04	32.53	34.04
2019	NYSE	NAT	Fri, Feb 3, 2006	31.52	32.21	31.38	32.20
2018	NYSE	NAT	Thu, Feb 2, 2006	31.92	31.92	31.27	31.37
2017	NYSE	NAT	Wed, Feb 1, 2006	32.00	32.05	31.47	31.72
2016	NYSE	NAT	Tue, Jan 31, 2006	31.87	32.21	31.59	31.78
2015	NYSE	NAT	Mon, Jan 30, 2006	31.40	32.08	31.27	31.77
2014	NYSE	NAT	Fri, Jan 27, 2006	31.10	31.52	31.06	31.47
2013	NYSE	NAT	Thu, Jan 26, 2006	31.38	31.66	30.77	31.10
2012	NYSE	NAT	Wed, Jan 25, 2006	31.67	31.67	30.74	31.28
2011	NYSE	NAT	Tue, Jan 24, 2006	30.49	31.62	30.49	31.42
2010	NYSE	NAT	Mon, Jan 23, 2006	29.66	30.33	29.46	30.24
2009	NYSE	NAT	Fri, Jan 20, 2006	29.29	29.69	29.16	29.37
2008	NYSE	NAT	Thu, Jan 19, 2006	29.16	29.41	28.89	29.10
2007	NYSE	NAT	Wed, Jan 18, 2006	29.74	29.82	28.80	29.20
2006	NYSE	NAT	Tue, Jan 17, 2006	30.08	30.28	29.74	29.84
2005	NYSE	NAT	Fri, Jan 13, 2006	30.18	30.36	29.83	30.08
2004	NYSE	NAT	Thu, Jan 12, 2006	30.23	30.23	29.74	30.17
2003	NYSE	NAT	Wed, Jan 11, 2006	30.38	30.48	29.89	30.17
2002	NYSE	NAT	Tue, Jan 10, 2006	30.17	30.28	29.88	30.21
2001	NYSE	NAT	Mon, Jan 9, 2006	30.13	30.48	29.94	30.10
2000	NYSE	NAT	Fri, Jan 6, 2006	29.93	30.28	29.74	29.93
1999	NYSE	NAT	Thu, Jan 5, 2006	30.11	30.29	29.44	29.83
1998	NYSE	NAT	Wed, Jan 4, 2006	29.64	30.28	29.64	30.01
1997	NYSE	NAT	Tue, Jan 3, 2006	28.74	29.52	28.74	29.44
1996	NYSE	NAT	Fri, Dec 30, 2005	28.45	28.74	28.43	28.54
1995	NYSE	NAT	Thu, Dec 29, 2005	28.52	29.17	28.52	28.82
1994	NYSE	NAT	Wed, Dec 28, 2005	28.40	28.79	28.40	28.61
1993	NYSE	NAT	Tue, Dec 27, 2005	28.74	28.99	28.40	28.50
1992	NYSE	NAT	Fri, Dec 23, 2005	28.79	28.94	28.40	28.69
1991	NYSE	NAT	Thu, Dec 22, 2005	29.42	29.44	28.75	28.76
1990	NYSE	NAT	Wed, Dec 21, 2005	28.73	29.34	28.57	29.23
1989	NYSE	NAT	Tue, Dec 20, 2005	29.44	29.98	28.35	28.89
1988	NYSE	NAT	Mon, Dec 19, 2005	30.31	30.48	29.49	29.64
1987	NYSE	NAT	Fri, Dec 16, 2005	30.73	30.88	29.98	30.09
1986	NYSE	NAT	Thu, Dec 15, 2005	30.48	30.92	29.75	30.65
1985	NYSE	NAT	Wed, Dec 14, 2005	30.58	30.99	30.54	30.63
1984	NYSE	NAT	Tue, Dec 13, 2005	30.73	31.02	30.65	30.68
1983	NYSE	NAT	Mon, Dec 12, 2005	31.27	31.61	30.73	31.15
1982	NYSE	NAT	Fri, Dec 9, 2005	30.78	31.37	30.78	31.17
1981	NYSE	NAT	Thu, Dec 8, 2005	31.13	31.53	30.80	30.98
1980	NYSE	NAT	Wed, Dec 7, 2005	32.08	32.36	31.02	31.23
1979	NYSE	NAT	Tue, Dec 6, 2005	32.31	32.70	32.13	32.23
1978	NYSE	NAT	Mon, Dec 5, 2005	32.51	32.85	32.21	32.41
1977	NYSE	NAT	Fri, Dec 2, 2005	33.01	33.40	32.72	33.21
1976	NYSE	NAT	Thu, Dec 1, 2005	32.71	33.40	32.71	33.01
1975	NYSE	NAT	Wed, Nov 30, 2005	31.76	32.70	31.72	32.51
1974	NYSE	NAT	Tue, Nov 29, 2005	31.32	31.98	31.22	31.77
1973	NYSE	NAT	Mon, Nov 28, 2005	31.62	31.62	30.53	30.87
1972	NYSE	NAT	Fri, Nov 25, 2005	30.88	31.49	30.88	31.47
1971	NYSE	NAT	Wed, Nov 23, 2005	31.63	31.63	30.73	30.99
1970	NYSE	NAT	Tue, Nov 22, 2005	31.68	31.81	31.48	31.48
1969	NYSE	NAT	Mon, Nov 21, 2005	31.64	31.92	31.42	31.72
1968	NYSE	NAT	Fri, Nov 18, 2005	32.02	32.04	31.63	31.97
1967	NYSE	NAT	Thu, Nov 17, 2005	31.62	31.82	31.39	31.67
1966	NYSE	NAT	Wed, Nov 16, 2005	31.88	31.96	30.83	31.43
1965	NYSE	NAT	Tue, Nov 15, 2005	32.62	32.81	31.48	31.86
1964	NYSE	NAT	Mon, Nov 14, 2005	33.06	33.63	32.51	32.73
1963	NYSE	NAT	Fri, Nov 11, 2005	33.24	33.24	32.71	32.91
1962	NYSE	NAT	Thu, Nov 10, 2005	33.75	33.76	32.82	33.34
1961	NYSE	NAT	Wed, Nov 9, 2005	32.71	34.33	32.71	33.76
1960	NYSE	NAT	Tue, Nov 8, 2005	32.12	32.96	31.91	32.79
1959	NYSE	NAT	Mon, Nov 7, 2005	31.97	32.70	31.97	32.20
1958	NYSE	NAT	Fri, Nov 4, 2005	31.84	32.31	31.42	32.05
1957	NYSE	NAT	Thu, Nov 3, 2005	31.22	32.21	31.14	31.83
1956	NYSE	NAT	Wed, Nov 2, 2005	30.63	31.19	30.48	31.02
1955	NYSE	NAT	Tue, Nov 1, 2005	31.72	31.72	30.89	31.13
1954	NYSE	NAT	Mon, Oct 31, 2005	31.27	32.11	31.27	31.86
1953	NYSE	NAT	Fri, Oct 28, 2005	31.57	32.03	31.35	31.92
1952	NYSE	NAT	Thu, Oct 27, 2005	32.86	32.86	31.60	31.64
1951	NYSE	NAT	Wed, Oct 26, 2005	32.95	33.61	32.76	32.87
1950	NYSE	NAT	Tue, Oct 25, 2005	32.41	33.21	32.41	33.05
1949	NYSE	NAT	Mon, Oct 24, 2005	31.65	32.68	31.63	31.92
1948	NYSE	NAT	Fri, Oct 21, 2005	30.63	31.71	30.57	31.65
1947	NYSE	NAT	Thu, Oct 20, 2005	31.17	32.46	30.93	31.05
1946	NYSE	NAT	Wed, Oct 19, 2005	31.52	32.30	31.49	32.15
1945	NYSE	NAT	Tue, Oct 18, 2005	33.21	33.54	32.18	32.33
1944	NYSE	NAT	Mon, Oct 17, 2005	33.93	34.18	33.50	33.95
1943	NYSE	NAT	Fri, Oct 14, 2005	33.30	34.83	33.05	33.93
1942	NYSE	NAT	Thu, Oct 13, 2005	34.30	34.64	33.24	33.74
1941	NYSE	NAT	Wed, Oct 12, 2005	36.97	36.97	34.96	35.35
1940	NYSE	NAT	Tue, Oct 11, 2005	35.68	36.72	35.19	36.72
1939	NYSE	NAT	Mon, Oct 10, 2005	35.09	35.19	34.20	34.94
1938	NYSE	NAT	Fri, Oct 7, 2005	34.39	35.93	34.36	35.49
1937	NYSE	NAT	Thu, Oct 6, 2005	34.39	34.76	33.95	34.32
1936	NYSE	NAT	Wed, Oct 5, 2005	35.55	35.93	33.70	34.79
1935	NYSE	NAT	Tue, Oct 4, 2005	37.37	37.37	35.18	35.75
1934	NYSE	NAT	Mon, Oct 3, 2005	37.27	37.57	37.19	37.57
1933	NYSE	NAT	Fri, Sep 30, 2005	37.57	37.60	37.16	37.44
1932	NYSE	NAT	Thu, Sep 29, 2005	37.47	37.76	36.97	37.62
1931	NYSE	NAT	Wed, Sep 28, 2005	38.41	38.53	37.47	37.55
1930	NYSE	NAT	Tue, Sep 27, 2005	37.37	38.34	37.24	38.34
1929	NYSE	NAT	Mon, Sep 26, 2005	38.65	38.65	37.07	37.42
1928	NYSE	NAT	Fri, Sep 23, 2005	39.60	39.64	38.98	39.11
1927	NYSE	NAT	Thu, Sep 22, 2005	39.62	39.65	39.09	39.57
1926	NYSE	NAT	Wed, Sep 21, 2005	39.51	39.64	39.25	39.54
1925	NYSE	NAT	Tue, Sep 20, 2005	38.56	39.25	38.56	39.16
1924	NYSE	NAT	Mon, Sep 19, 2005	39.10	39.20	38.13	38.87
1923	NYSE	NAT	Fri, Sep 16, 2005	38.46	39.10	38.26	39.10
1922	NYSE	NAT	Thu, Sep 15, 2005	38.86	39.03	38.17	38.51
1921	NYSE	NAT	Wed, Sep 14, 2005	39.23	39.30	38.79	38.93
1920	NYSE	NAT	Tue, Sep 13, 2005	38.51	38.87	38.02	38.79
1919	NYSE	NAT	Mon, Sep 12, 2005	39.05	39.25	38.66	38.66
1918	NYSE	NAT	Fri, Sep 9, 2005	38.46	39.36	38.39	39.25
1917	NYSE	NAT	Thu, Sep 8, 2005	38.78	38.92	38.42	38.51
1916	NYSE	NAT	Wed, Sep 7, 2005	39.10	39.10	38.71	38.78
1915	NYSE	NAT	Tue, Sep 6, 2005	38.86	39.39	38.66	39.12
1914	NYSE	NAT	Fri, Sep 2, 2005	41.33	41.63	39.95	40.05
1913	NYSE	NAT	Thu, Sep 1, 2005	41.33	41.62	40.66	41.13
1912	NYSE	NAT	Wed, Aug 31, 2005	39.60	41.17	39.50	41.07
1911	NYSE	NAT	Tue, Aug 30, 2005	39.50	39.56	38.78	39.40
1910	NYSE	NAT	Mon, Aug 29, 2005	38.41	39.56	38.41	39.56
1909	NYSE	NAT	Fri, Aug 26, 2005	38.29	38.33	37.57	37.77
1908	NYSE	NAT	Thu, Aug 25, 2005	38.86	39.20	38.15	38.29
1907	NYSE	NAT	Wed, Aug 24, 2005	38.80	40.06	38.68	38.81
1906	NYSE	NAT	Tue, Aug 23, 2005	39.05	39.40	38.25	38.30
1905	NYSE	NAT	Mon, Aug 22, 2005	39.65	39.79	38.87	39.05
1904	NYSE	NAT	Fri, Aug 19, 2005	39.10	40.19	39.10	39.65
1903	NYSE	NAT	Thu, Aug 18, 2005	38.68	39.15	38.48	38.95
1902	NYSE	NAT	Wed, Aug 17, 2005	38.66	39.30	38.31	38.68
1901	NYSE	NAT	Tue, Aug 16, 2005	38.47	39.14	38.24	38.66
1900	NYSE	NAT	Mon, Aug 15, 2005	39.25	39.35	38.16	38.57
1899	NYSE	NAT	Fri, Aug 12, 2005	39.55	40.06	39.25	39.60
1898	NYSE	NAT	Thu, Aug 11, 2005	41.13	41.13	39.77	40.04
1897	NYSE	NAT	Wed, Aug 10, 2005	40.53	41.12	39.75	40.65
1896	NYSE	NAT	Tue, Aug 9, 2005	40.64	40.84	39.05	39.65
1895	NYSE	NAT	Mon, Aug 8, 2005	41.13	41.88	40.64	40.84
1894	NYSE	NAT	Fri, Aug 5, 2005	45.27	45.27	43.13	43.20
1893	NYSE	NAT	Thu, Aug 4, 2005	44.52	45.20	44.50	45.12
1892	NYSE	NAT	Wed, Aug 3, 2005	45.10	45.11	43.87	44.52
1891	NYSE	NAT	Tue, Aug 2, 2005	45.22	46.07	45.15	45.60
1890	NYSE	NAT	Mon, Aug 1, 2005	45.30	45.59	45.08	45.12
1889	NYSE	NAT	Fri, Jul 29, 2005	45.05	45.15	44.68	45.15
1888	NYSE	NAT	Thu, Jul 28, 2005	44.70	44.86	44.26	44.85
1887	NYSE	NAT	Wed, Jul 27, 2005	44.31	44.98	43.71	44.66
1886	NYSE	NAT	Tue, Jul 26, 2005	45.01	45.07	43.81	43.97
1885	NYSE	NAT	Mon, Jul 25, 2005	45.30	45.44	44.60	44.76
1884	NYSE	NAT	Fri, Jul 22, 2005	44.65	45.24	44.60	45.08
1883	NYSE	NAT	Thu, Jul 21, 2005	44.65	45.48	44.49	44.50
1882	NYSE	NAT	Wed, Jul 20, 2005	44.75	45.00	44.21	44.41
1881	NYSE	NAT	Tue, Jul 19, 2005	43.96	44.71	43.15	44.59
1880	NYSE	NAT	Mon, Jul 18, 2005	44.50	44.68	43.30	43.86
1879	NYSE	NAT	Fri, Jul 15, 2005	44.06	44.69	43.80	44.60
1878	NYSE	NAT	Thu, Jul 14, 2005	45.00	45.20	43.30	43.94
1877	NYSE	NAT	Wed, Jul 13, 2005	45.35	45.44	44.91	45.00
1876	NYSE	NAT	Tue, Jul 12, 2005	44.75	45.38	44.67	45.18
1875	NYSE	NAT	Mon, Jul 11, 2005	45.60	45.78	44.51	44.61
1874	NYSE	NAT	Fri, Jul 8, 2005	45.00	45.45	44.95	45.30
1873	NYSE	NAT	Thu, Jul 7, 2005	44.79	45.15	44.42	44.90
1872	NYSE	NAT	Wed, Jul 6, 2005	44.26	44.90	43.96	44.59
1871	NYSE	NAT	Tue, Jul 5, 2005	42.94	44.31	42.92	44.02
1870	NYSE	NAT	Fri, Jul 1, 2005	42.72	43.07	42.44	42.69
1869	NYSE	NAT	Thu, Jun 30, 2005	42.37	42.62	41.65	42.08
1868	NYSE	NAT	Wed, Jun 29, 2005	41.53	42.37	41.53	42.32
1867	NYSE	NAT	Tue, Jun 28, 2005	41.88	42.16	41.49	41.73
1866	NYSE	NAT	Mon, Jun 27, 2005	42.13	42.25	41.64	41.77
1865	NYSE	NAT	Fri, Jun 24, 2005	42.03	42.31	41.29	41.43
1864	NYSE	NAT	Thu, Jun 23, 2005	41.63	43.11	41.19	41.90
1863	NYSE	NAT	Wed, Jun 22, 2005	40.64	41.19	40.64	41.11
1862	NYSE	NAT	Tue, Jun 21, 2005	40.39	40.64	40.04	40.29
1861	NYSE	NAT	Mon, Jun 20, 2005	39.10	40.39	39.10	40.04
1860	NYSE	NAT	Fri, Jun 17, 2005	39.31	40.04	39.15	39.53
1859	NYSE	NAT	Thu, Jun 16, 2005	40.00	40.00	39.10	39.16
1858	NYSE	NAT	Wed, Jun 15, 2005	39.34	40.01	39.20	39.85
1857	NYSE	NAT	Tue, Jun 14, 2005	39.45	39.55	39.15	39.44
1856	NYSE	NAT	Mon, Jun 13, 2005	40.34	40.34	39.05	39.55
1855	NYSE	NAT	Fri, Jun 10, 2005	40.84	40.88	40.15	40.34
1854	NYSE	NAT	Thu, Jun 9, 2005	40.69	40.82	39.82	40.61
1853	NYSE	NAT	Wed, Jun 8, 2005	41.21	41.23	40.04	40.63
1852	NYSE	NAT	Tue, Jun 7, 2005	40.49	41.38	40.45	41.04
1851	NYSE	NAT	Mon, Jun 6, 2005	39.70	40.24	39.40	40.14
1850	NYSE	NAT	Fri, Jun 3, 2005	38.15	39.12	37.15	38.86
1849	NYSE	NAT	Thu, Jun 2, 2005	38.66	39.47	37.76	38.16
1848	NYSE	NAT	Wed, Jun 1, 2005	39.66	39.66	38.41	38.81
1847	NYSE	NAT	Tue, May 31, 2005	39.80	39.95	39.40	39.65
1846	NYSE	NAT	Fri, May 27, 2005	39.15	39.80	38.91	39.41
1845	NYSE	NAT	Thu, May 26, 2005	38.70	39.45	38.65	39.06
1844	NYSE	NAT	Wed, May 25, 2005	38.26	39.04	37.67	38.56
1843	NYSE	NAT	Tue, May 24, 2005	39.40	39.54	38.26	38.54
1842	NYSE	NAT	Mon, May 23, 2005	40.39	40.39	39.15	39.85
1841	NYSE	NAT	Fri, May 20, 2005	41.42	41.52	40.53	40.78
1840	NYSE	NAT	Thu, May 19, 2005	41.78	41.79	40.66	41.23
1839	NYSE	NAT	Wed, May 18, 2005	41.68	42.22	41.56	41.88
1838	NYSE	NAT	Tue, May 17, 2005	40.78	42.31	40.40	41.48
1837	NYSE	NAT	Mon, May 16, 2005	39.62	42.02	39.62	40.98
1836	NYSE	NAT	Fri, May 13, 2005	40.89	41.37	38.71	40.23
1835	NYSE	NAT	Thu, May 12, 2005	43.32	43.32	40.44	40.89
1834	NYSE	NAT	Wed, May 11, 2005	43.86	43.90	43.04	43.41
1833	NYSE	NAT	Tue, May 10, 2005	43.61	44.36	43.55	43.91
1832	NYSE	NAT	Mon, May 9, 2005	46.24	46.24	44.95	45.10
1831	NYSE	NAT	Fri, May 6, 2005	46.39	46.95	46.15	46.44
1830	NYSE	NAT	Thu, May 5, 2005	45.45	46.42	45.22	46.09
1829	NYSE	NAT	Wed, May 4, 2005	44.96	47.27	44.49	46.34
1828	NYSE	NAT	Tue, May 3, 2005	45.10	45.25	44.21	44.95
1827	NYSE	NAT	Mon, May 2, 2005	44.70	45.83	44.15	45.25
1826	NYSE	NAT	Fri, Apr 29, 2005	46.60	47.51	45.14	46.19
1825	NYSE	NAT	Thu, Apr 28, 2005	48.24	48.24	46.09	46.59
1824	NYSE	NAT	Wed, Apr 27, 2005	48.77	49.01	47.08	48.60
1823	NYSE	NAT	Tue, Apr 26, 2005	49.12	49.12	47.60	48.73
1822	NYSE	NAT	Mon, Apr 25, 2005	49.31	49.35	48.48	49.13
1821	NYSE	NAT	Fri, Apr 22, 2005	48.37	49.06	47.09	49.03
1820	NYSE	NAT	Thu, Apr 21, 2005	46.39	48.40	46.36	48.07
1819	NYSE	NAT	Wed, Apr 20, 2005	46.83	47.03	45.60	46.14
1818	NYSE	NAT	Tue, Apr 19, 2005	42.87	46.59	42.87	46.34
1817	NYSE	NAT	Mon, Apr 18, 2005	42.67	42.86	40.89	42.45
1816	NYSE	NAT	Fri, Apr 15, 2005	43.12	44.50	42.52	42.77
1815	NYSE	NAT	Thu, Apr 14, 2005	46.64	46.74	42.01	43.86
1814	NYSE	NAT	Wed, Apr 13, 2005	47.73	47.78	46.11	46.25
1813	NYSE	NAT	Tue, Apr 12, 2005	47.58	47.87	47.08	47.58
1812	NYSE	NAT	Mon, Apr 11, 2005	47.18	47.43	46.80	47.18
1811	NYSE	NAT	Fri, Apr 8, 2005	48.27	48.35	46.84	47.36
1810	NYSE	NAT	Thu, Apr 7, 2005	49.09	49.26	48.09	48.17
1809	NYSE	NAT	Wed, Apr 6, 2005	48.67	49.31	48.57	48.86
1808	NYSE	NAT	Tue, Apr 5, 2005	48.40	48.82	47.93	48.42
1807	NYSE	NAT	Mon, Apr 4, 2005	48.27	48.52	47.92	48.30
1806	NYSE	NAT	Fri, Apr 1, 2005	47.43	48.07	47.33	47.82
1805	NYSE	NAT	Thu, Mar 31, 2005	46.69	47.43	46.59	47.03
1804	NYSE	NAT	Wed, Mar 30, 2005	46.60	46.96	46.11	46.31
1803	NYSE	NAT	Tue, Mar 29, 2005	47.97	48.06	46.32	46.59
1802	NYSE	NAT	Mon, Mar 28, 2005	47.89	48.07	47.22	47.85
1801	NYSE	NAT	Thu, Mar 24, 2005	46.81	48.02	46.76	47.70
1800	NYSE	NAT	Wed, Mar 23, 2005	47.63	47.63	45.84	46.57
1799	NYSE	NAT	Tue, Mar 22, 2005	47.78	48.42	47.48	47.63
1798	NYSE	NAT	Mon, Mar 21, 2005	46.93	47.73	46.93	47.38
1797	NYSE	NAT	Fri, Mar 18, 2005	47.18	47.50	46.60	46.93
1796	NYSE	NAT	Thu, Mar 17, 2005	47.08	47.72	46.76	47.10
1795	NYSE	NAT	Wed, Mar 16, 2005	46.94	47.50	45.94	46.58
1794	NYSE	NAT	Tue, Mar 15, 2005	48.47	48.52	46.93	47.08
1793	NYSE	NAT	Mon, Mar 14, 2005	46.83	47.90	46.59	47.61
1792	NYSE	NAT	Fri, Mar 11, 2005	44.80	46.95	44.79	46.30
1791	NYSE	NAT	Thu, Mar 10, 2005	46.83	46.83	43.41	44.06
1790	NYSE	NAT	Wed, Mar 9, 2005	46.09	47.56	45.90	46.34
1789	NYSE	NAT	Tue, Mar 8, 2005	46.44	46.83	45.60	46.29
1788	NYSE	NAT	Mon, Mar 7, 2005	48.47	48.47	46.88	47.44
1787	NYSE	NAT	Fri, Mar 4, 2005	47.83	48.49	46.59	48.04
1786	NYSE	NAT	Thu, Mar 3, 2005	48.57	49.01	47.58	47.61
1785	NYSE	NAT	Wed, Mar 2, 2005	51.34	52.17	49.87	49.92
1784	NYSE	NAT	Tue, Mar 1, 2005	55.56	55.66	52.53	52.83
1783	NYSE	NAT	Mon, Feb 28, 2005	54.96	56.18	54.64	55.56
1782	NYSE	NAT	Fri, Feb 25, 2005	52.74	54.86	52.61	54.22
1781	NYSE	NAT	Thu, Feb 24, 2005	51.15	52.52	51.08	52.49
1780	NYSE	NAT	Wed, Feb 23, 2005	50.29	50.80	50.29	50.79
1779	NYSE	NAT	Tue, Feb 22, 2005	49.91	50.65	49.33	50.05
1778	NYSE	NAT	Fri, Feb 18, 2005	51.10	51.10	49.57	49.96
1777	NYSE	NAT	Thu, Feb 17, 2005	50.93	51.97	50.06	50.90
1776	NYSE	NAT	Wed, Feb 16, 2005	52.04	52.05	48.58	50.91
1775	NYSE	NAT	Tue, Feb 15, 2005	52.04	53.22	51.94	52.85
1774	NYSE	NAT	Mon, Feb 14, 2005	49.66	51.96	49.65	51.59
1773	NYSE	NAT	Fri, Feb 11, 2005	49.01	49.80	48.82	49.66
1772	NYSE	NAT	Thu, Feb 10, 2005	47.83	48.87	47.68	48.52
1771	NYSE	NAT	Wed, Feb 9, 2005	47.18	48.24	46.83	47.58
1770	NYSE	NAT	Tue, Feb 8, 2005	48.79	48.82	46.14	47.18
1769	NYSE	NAT	Mon, Feb 7, 2005	47.08	48.57	47.08	48.57
1768	NYSE	NAT	Fri, Feb 4, 2005	46.59	46.83	46.09	46.74
1767	NYSE	NAT	Thu, Feb 3, 2005	47.58	47.58	44.99	46.80
1766	NYSE	NAT	Wed, Feb 2, 2005	48.57	48.65	46.37	47.52
1765	NYSE	NAT	Tue, Feb 1, 2005	48.57	50.91	48.38	49.85
1764	NYSE	NAT	Mon, Jan 31, 2005	46.74	48.32	46.39	48.27
1763	NYSE	NAT	Fri, Jan 28, 2005	45.43	46.78	45.10	46.29
1762	NYSE	NAT	Thu, Jan 27, 2005	43.98	45.30	43.74	45.12
1761	NYSE	NAT	Wed, Jan 26, 2005	41.63	43.81	41.63	43.73
1760	NYSE	NAT	Tue, Jan 25, 2005	40.54	41.38	40.54	41.18
1759	NYSE	NAT	Mon, Jan 24, 2005	40.64	40.74	40.30	40.54
1758	NYSE	NAT	Fri, Jan 21, 2005	39.50	40.58	39.50	40.16
1757	NYSE	NAT	Thu, Jan 20, 2005	40.05	40.05	38.68	39.40
1756	NYSE	NAT	Wed, Jan 19, 2005	40.64	40.64	40.00	40.04
1755	NYSE	NAT	Tue, Jan 18, 2005	41.33	41.82	40.00	40.64
1754	NYSE	NAT	Fri, Jan 14, 2005	40.14	41.35	40.14	40.74
1753	NYSE	NAT	Thu, Jan 13, 2005	39.25	40.00	39.15	39.83
1752	NYSE	NAT	Wed, Jan 12, 2005	38.11	38.97	38.04	38.97
1751	NYSE	NAT	Tue, Jan 11, 2005	38.11	38.40	37.81	38.08
1750	NYSE	NAT	Mon, Jan 10, 2005	38.24	38.66	37.67	37.86
1749	NYSE	NAT	Fri, Jan 7, 2005	37.62	37.96	36.99	37.70
1748	NYSE	NAT	Thu, Jan 6, 2005	36.18	37.66	36.18	37.65
1747	NYSE	NAT	Wed, Jan 5, 2005	36.78	37.25	35.63	35.94
1746	NYSE	NAT	Tue, Jan 4, 2005	36.87	37.33	36.61	36.77
1745	NYSE	NAT	Mon, Jan 3, 2005	38.46	38.51	36.67	36.87
1744	NYSE	NAT	Fri, Dec 31, 2004	38.41	39.05	38.41	38.71
1743	NYSE	NAT	Thu, Dec 30, 2004	39.17	39.33	38.41	38.44
1742	NYSE	NAT	Wed, Dec 29, 2004	39.60	39.60	38.36	39.16
1741	NYSE	NAT	Tue, Dec 28, 2004	38.54	39.64	38.54	39.59
1740	NYSE	NAT	Mon, Dec 27, 2004	38.75	38.85	37.38	38.02
1739	NYSE	NAT	Thu, Dec 23, 2004	39.55	39.55	38.51	38.75
1738	NYSE	NAT	Wed, Dec 22, 2004	40.09	40.14	39.40	39.52
1737	NYSE	NAT	Tue, Dec 21, 2004	39.25	40.00	39.00	40.00
1736	NYSE	NAT	Mon, Dec 20, 2004	38.06	38.39	37.92	38.16
1735	NYSE	NAT	Fri, Dec 17, 2004	37.24	38.16	37.24	37.92
1734	NYSE	NAT	Thu, Dec 16, 2004	37.96	37.96	37.03	37.14
1733	NYSE	NAT	Wed, Dec 15, 2004	36.47	37.88	36.43	37.53
1732	NYSE	NAT	Tue, Dec 14, 2004	36.18	36.36	35.56	35.90
1731	NYSE	NAT	Mon, Dec 13, 2004	35.53	36.43	35.53	36.08
1730	NYSE	NAT	Fri, Dec 10, 2004	36.81	36.98	34.95	35.34
1729	NYSE	NAT	Thu, Dec 9, 2004	36.88	37.27	36.29	36.80
1728	NYSE	NAT	Wed, Dec 8, 2004	36.65	37.96	35.68	37.63
1727	NYSE	NAT	Tue, Dec 7, 2004	38.36	38.39	36.72	36.73
1726	NYSE	NAT	Mon, Dec 6, 2004	38.28	38.90	37.76	38.36
1725	NYSE	NAT	Fri, Dec 3, 2004	36.27	38.90	36.07	38.36
1724	NYSE	NAT	Thu, Dec 2, 2004	38.16	38.16	35.44	36.18
1723	NYSE	NAT	Wed, Dec 1, 2004	40.13	40.14	38.66	38.66
1722	NYSE	NAT	Tue, Nov 30, 2004	40.18	40.18	39.99	40.05
1721	NYSE	NAT	Mon, Nov 29, 2004	40.42	40.44	39.64	40.18
1720	NYSE	NAT	Fri, Nov 26, 2004	40.04	40.39	40.04	40.09
1719	NYSE	NAT	Wed, Nov 24, 2004	40.14	40.34	39.66	40.04
1718	NYSE	NAT	Tue, Nov 23, 2004	40.22	40.94	40.10	40.28
1717	NYSE	NAT	Mon, Nov 22, 2004	38.95	40.12	38.89	40.12
1716	NYSE	NAT	Fri, Nov 19, 2004	38.31	39.04	38.22	38.71
1715	NYSE	NAT	Thu, Nov 18, 2004	38.90	39.15	38.01	38.31
1714	NYSE	NAT	Wed, Nov 17, 2004	38.71	40.44	38.70	39.70
1713	NYSE	NAT	Tue, Nov 16, 2004	38.90	38.90	38.46	38.64
1712	NYSE	NAT	Mon, Nov 15, 2004	38.76	38.81	37.52	38.58
1711	NYSE	NAT	Fri, Nov 12, 2004	38.21	39.15	38.21	38.76
1710	NYSE	NAT	Thu, Nov 11, 2004	37.76	38.23	37.53	38.21
1709	NYSE	NAT	Wed, Nov 10, 2004	37.67	37.76	37.31	37.67
1708	NYSE	NAT	Tue, Nov 9, 2004	38.65	38.73	36.34	37.67
1707	NYSE	NAT	Mon, Nov 8, 2004	40.37	40.48	38.16	38.46
1706	NYSE	NAT	Fri, Nov 5, 2004	40.39	41.22	40.05	40.36
1705	NYSE	NAT	Thu, Nov 4, 2004	39.05	40.39	38.86	40.10
1704	NYSE	NAT	Wed, Nov 3, 2004	38.51	38.93	38.01	38.14
1703	NYSE	NAT	Tue, Nov 2, 2004	38.41	38.42	37.88	38.16
1702	NYSE	NAT	Mon, Nov 1, 2004	37.52	38.65	37.39	38.16
1701	NYSE	NAT	Fri, Oct 29, 2004	36.18	37.47	35.93	37.32
1700	NYSE	NAT	Thu, Oct 28, 2004	36.48	37.17	35.01	36.31
1699	NYSE	NAT	Wed, Oct 27, 2004	37.67	37.94	35.68	37.04
1698	NYSE	NAT	Tue, Oct 26, 2004	39.64	39.85	38.66	39.85
1697	NYSE	NAT	Mon, Oct 25, 2004	39.40	39.65	39.15	39.64
1696	NYSE	NAT	Fri, Oct 22, 2004	39.02	39.60	38.75	38.85
1695	NYSE	NAT	Thu, Oct 21, 2004	38.56	39.03	37.92	38.73
1694	NYSE	NAT	Wed, Oct 20, 2004	37.62	38.02	37.52	37.75
1693	NYSE	NAT	Tue, Oct 19, 2004	38.14	38.52	36.92	37.48
1692	NYSE	NAT	Mon, Oct 18, 2004	37.43	38.15	37.18	38.05
1691	NYSE	NAT	Fri, Oct 15, 2004	35.88	37.27	35.68	37.13
1690	NYSE	NAT	Thu, Oct 14, 2004	33.30	36.28	33.22	35.49
1689	NYSE	NAT	Wed, Oct 13, 2004	34.20	34.44	30.88	32.70
1688	NYSE	NAT	Tue, Oct 12, 2004	35.29	35.38	33.70	34.44
1687	NYSE	NAT	Mon, Oct 11, 2004	37.13	37.13	34.69	35.38
1686	NYSE	NAT	Fri, Oct 8, 2004	37.16	38.31	36.80	37.12
1685	NYSE	NAT	Thu, Oct 7, 2004	37.38	39.14	36.78	37.15
1684	NYSE	NAT	Wed, Oct 6, 2004	36.86	37.83	35.19	37.33
1683	NYSE	NAT	Tue, Oct 5, 2004	36.08	36.72	36.08	36.72
1682	NYSE	NAT	Mon, Oct 4, 2004	35.67	36.12	34.89	35.68
1681	NYSE	NAT	Fri, Oct 1, 2004	33.89	35.44	33.89	35.28
1680	NYSE	NAT	Thu, Sep 30, 2004	33.21	34.18	32.53	33.99
1679	NYSE	NAT	Wed, Sep 29, 2004	34.62	34.69	32.22	33.36
1678	NYSE	NAT	Tue, Sep 28, 2004	34.85	35.10	34.39	34.82
1677	NYSE	NAT	Mon, Sep 27, 2004	35.39	35.68	34.22	35.10
1676	NYSE	NAT	Fri, Sep 24, 2004	34.31	35.43	34.31	35.18
1675	NYSE	NAT	Thu, Sep 23, 2004	34.20	34.44	33.71	34.39
1674	NYSE	NAT	Wed, Sep 22, 2004	33.70	34.49	33.30	33.91
1673	NYSE	NAT	Tue, Sep 21, 2004	33.21	33.70	33.11	33.70
1672	NYSE	NAT	Mon, Sep 20, 2004	32.71	33.36	32.46	32.81
1671	NYSE	NAT	Fri, Sep 17, 2004	32.05	32.70	31.76	32.46
1670	NYSE	NAT	Thu, Sep 16, 2004	31.99	32.11	31.72	31.85
1669	NYSE	NAT	Wed, Sep 15, 2004	32.43	32.49	31.97	32.11
1668	NYSE	NAT	Tue, Sep 14, 2004	32.91	33.20	31.92	32.43
1667	NYSE	NAT	Mon, Sep 13, 2004	32.36	32.86	31.27	32.68
1666	NYSE	NAT	Fri, Sep 10, 2004	33.11	33.45	30.63	32.31
1665	NYSE	NAT	Thu, Sep 9, 2004	32.20	33.13	32.11	33.02
1664	NYSE	NAT	Wed, Sep 8, 2004	31.17	32.21	30.93	31.82
1663	NYSE	NAT	Tue, Sep 7, 2004	30.48	31.47	30.29	30.73
1662	NYSE	NAT	Fri, Sep 3, 2004	30.03	30.68	29.39	30.07
1661	NYSE	NAT	Thu, Sep 2, 2004	29.84	31.07	29.50	30.27
1660	NYSE	NAT	Wed, Sep 1, 2004	29.41	29.97	29.29	29.92
1659	NYSE	NAT	Tue, Aug 31, 2004	28.70	29.23	28.21	28.91
1658	NYSE	NAT	Mon, Aug 30, 2004	28.25	28.84	28.15	28.73
1657	NYSE	NAT	Fri, Aug 27, 2004	27.75	29.19	27.75	28.85
1656	NYSE	NAT	Thu, Aug 26, 2004	28.69	28.73	27.75	27.75
1655	NYSE	NAT	Wed, Aug 25, 2004	27.85	28.74	27.75	28.49
1654	NYSE	NAT	Tue, Aug 24, 2004	28.30	28.65	27.75	27.76
1653	NYSE	NAT	Mon, Aug 23, 2004	28.65	28.96	27.75	28.15
1652	NYSE	NAT	Fri, Aug 20, 2004	27.06	28.39	27.06	28.35
1651	NYSE	NAT	Thu, Aug 19, 2004	26.07	27.21	25.97	26.96
1650	NYSE	NAT	Wed, Aug 18, 2004	25.28	26.10	25.03	25.97
1649	NYSE	NAT	Tue, Aug 17, 2004	26.30	26.60	25.72	25.79
1648	NYSE	NAT	Mon, Aug 16, 2004	26.75	26.76	25.97	26.28
1647	NYSE	NAT	Fri, Aug 13, 2004	26.47	26.96	26.29	26.55
1646	NYSE	NAT	Thu, Aug 12, 2004	26.75	26.75	25.34	26.37
1645	NYSE	NAT	Wed, Aug 11, 2004	26.66	26.96	25.87	26.76
1644	NYSE	NAT	Tue, Aug 10, 2004	27.02	27.45	26.37	26.67
1643	NYSE	NAT	Mon, Aug 9, 2004	24.78	27.51	24.78	26.52
1642	NYSE	NAT	Fri, Aug 6, 2004	26.78	26.81	25.03	25.35
1641	NYSE	NAT	Thu, Aug 5, 2004	29.24	29.25	26.32	27.27
1640	NYSE	NAT	Wed, Aug 4, 2004	31.76	31.76	28.86	29.40
1639	NYSE	NAT	Tue, Aug 3, 2004	28.74	32.94	28.74	32.20
1638	NYSE	NAT	Mon, Aug 2, 2004	32.72	33.14	30.88	32.94
1637	NYSE	NAT	Fri, Jul 30, 2004	33.50	33.80	32.71	32.82
1636	NYSE	NAT	Thu, Jul 29, 2004	32.56	33.65	32.21	33.54
1635	NYSE	NAT	Wed, Jul 28, 2004	32.51	33.24	32.21	32.93
1634	NYSE	NAT	Tue, Jul 27, 2004	32.61	32.91	31.87	32.71
1633	NYSE	NAT	Mon, Jul 26, 2004	33.65	33.70	32.31	33.68
1632	NYSE	NAT	Fri, Jul 23, 2004	33.11	33.90	32.81	32.96
1631	NYSE	NAT	Thu, Jul 22, 2004	34.20	34.44	32.21	33.01
1630	NYSE	NAT	Wed, Jul 21, 2004	34.59	35.29	34.11	34.21
1629	NYSE	NAT	Tue, Jul 20, 2004	32.89	34.15	32.71	34.10
1628	NYSE	NAT	Mon, Jul 19, 2004	30.54	32.27	30.46	32.27
1627	NYSE	NAT	Fri, Jul 16, 2004	32.26	32.90	31.07	31.53
1626	NYSE	NAT	Thu, Jul 15, 2004	33.60	34.28	32.11	32.12
1625	NYSE	NAT	Wed, Jul 14, 2004	29.34	33.21	29.34	32.96
1624	NYSE	NAT	Tue, Jul 13, 2004	32.23	32.23	29.63	29.89
1623	NYSE	NAT	Mon, Jul 12, 2004	37.38	37.38	31.72	32.73
1622	NYSE	NAT	Fri, Jul 9, 2004	36.18	37.42	36.18	37.38
1621	NYSE	NAT	Thu, Jul 8, 2004	35.24	36.68	35.20	35.83
1620	NYSE	NAT	Wed, Jul 7, 2004	34.72	35.67	34.72	35.46
1619	NYSE	NAT	Tue, Jul 6, 2004	34.19	35.68	33.95	34.91
1618	NYSE	NAT	Fri, Jul 2, 2004	32.83	33.93	32.71	33.79
1617	NYSE	NAT	Thu, Jul 1, 2004	32.65	33.29	32.65	32.83
1616	NYSE	NAT	Wed, Jun 30, 2004	32.81	32.81	32.22	32.64
1615	NYSE	NAT	Tue, Jun 29, 2004	32.76	32.91	32.21	32.66
1614	NYSE	NAT	Mon, Jun 28, 2004	32.36	33.64	31.97	32.41
1613	NYSE	NAT	Fri, Jun 25, 2004	31.06	32.70	31.06	32.34
1612	NYSE	NAT	Thu, Jun 24, 2004	30.38	31.06	30.35	30.98
1611	NYSE	NAT	Wed, Jun 23, 2004	29.74	30.36	29.74	30.24
1610	NYSE	NAT	Tue, Jun 22, 2004	30.51	30.51	29.34	29.60
1609	NYSE	NAT	Mon, Jun 21, 2004	28.89	31.11	28.89	30.51
1608	NYSE	NAT	Fri, Jun 18, 2004	30.28	30.49	28.03	28.84
1607	NYSE	NAT	Thu, Jun 17, 2004	32.96	34.29	29.74	30.94
1606	NYSE	NAT	Wed, Jun 16, 2004	31.27	33.59	31.12	33.12
1605	NYSE	NAT	Tue, Jun 15, 2004	29.98	31.67	29.98	30.95
1604	NYSE	NAT	Mon, Jun 14, 2004	29.64	29.98	29.54	29.78
1603	NYSE	NAT	Thu, Jun 10, 2004	28.88	29.64	28.88	29.52
1602	NYSE	NAT	Wed, Jun 9, 2004	28.61	29.14	28.37	28.82
1601	NYSE	NAT	Tue, Jun 8, 2004	28.36	28.64	28.25	28.60
1600	NYSE	NAT	Mon, Jun 7, 2004	28.38	28.39	27.78	28.35
1599	NYSE	NAT	Fri, Jun 4, 2004	28.74	28.74	28.15	28.36
1598	NYSE	NAT	Thu, Jun 3, 2004	28.26	28.74	28.15	28.64
1597	NYSE	NAT	Wed, Jun 2, 2004	27.85	28.24	27.74	28.15
1596	NYSE	NAT	Tue, Jun 1, 2004	27.26	27.99	27.26	27.76
1595	NYSE	NAT	Fri, May 28, 2004	26.75	27.01	26.27	26.90
1594	NYSE	NAT	Thu, May 27, 2004	27.26	27.51	25.52	26.66
1593	NYSE	NAT	Wed, May 26, 2004	26.76	27.26	26.56	27.11
1592	NYSE	NAT	Tue, May 25, 2004	26.86	27.01	26.03	26.67
1591	NYSE	NAT	Mon, May 24, 2004	25.70	26.91	25.67	26.66
1590	NYSE	NAT	Fri, May 21, 2004	26.13	26.13	25.56	25.70
1589	NYSE	NAT	Thu, May 20, 2004	25.97	26.04	25.52	25.88
1588	NYSE	NAT	Wed, May 19, 2004	26.02	26.04	24.76	25.92
1587	NYSE	NAT	Tue, May 18, 2004	25.37	25.86	25.13	25.67
1586	NYSE	NAT	Mon, May 17, 2004	24.73	25.27	24.54	24.80
1585	NYSE	NAT	Fri, May 14, 2004	25.28	25.28	24.19	24.93
1584	NYSE	NAT	Thu, May 13, 2004	24.38	25.18	24.15	25.03
1583	NYSE	NAT	Wed, May 12, 2004	23.36	24.41	23.29	24.09
1582	NYSE	NAT	Tue, May 11, 2004	21.91	23.44	21.73	23.11
1581	NYSE	NAT	Mon, May 10, 2004	23.44	23.45	21.06	22.10
1580	NYSE	NAT	Fri, May 7, 2004	24.74	24.74	23.69	23.70
1579	NYSE	NAT	Thu, May 6, 2004	24.68	24.68	23.31	24.54
1578	NYSE	NAT	Wed, May 5, 2004	25.56	25.56	23.79	24.74
1577	NYSE	NAT	Tue, May 4, 2004	25.47	25.56	25.28	25.52
1576	NYSE	NAT	Mon, May 3, 2004	24.16	25.68	22.90	25.28
1575	NYSE	NAT	Fri, Apr 30, 2004	22.61	24.47	22.61	23.94
1574	NYSE	NAT	Thu, Apr 29, 2004	25.11	25.11	22.30	22.75
1573	NYSE	NAT	Wed, Apr 28, 2004	26.71	26.76	24.91	25.21
1572	NYSE	NAT	Tue, Apr 27, 2004	26.27	27.26	25.57	26.93
1571	NYSE	NAT	Mon, Apr 26, 2004	28.11	28.74	28.05	28.25
1570	NYSE	NAT	Fri, Apr 23, 2004	28.00	28.70	27.78	28.05
1569	NYSE	NAT	Thu, Apr 22, 2004	27.43	28.18	27.26	27.75
1568	NYSE	NAT	Wed, Apr 21, 2004	27.75	27.85	25.78	27.03
1567	NYSE	NAT	Tue, Apr 20, 2004	28.70	28.70	27.76	28.00
1566	NYSE	NAT	Mon, Apr 19, 2004	26.86	28.25	26.86	27.99
1565	NYSE	NAT	Fri, Apr 16, 2004	25.67	26.51	25.67	26.48
1564	NYSE	NAT	Thu, Apr 15, 2004	25.77	26.27	24.88	25.34
1563	NYSE	NAT	Wed, Apr 14, 2004	24.29	26.02	24.15	25.58
1562	NYSE	NAT	Tue, Apr 13, 2004	24.98	25.28	23.83	24.10
1561	NYSE	NAT	Mon, Apr 12, 2004	23.64	25.77	23.59	24.48
1560	NYSE	NAT	Thu, Apr 8, 2004	23.49	23.74	23.39	23.39
1559	NYSE	NAT	Wed, Apr 7, 2004	22.55	23.34	21.86	23.29
1558	NYSE	NAT	Tue, Apr 6, 2004	24.28	24.28	21.74	22.70
1557	NYSE	NAT	Mon, Apr 5, 2004	25.57	25.76	25.28	25.29
1556	NYSE	NAT	Fri, Apr 2, 2004	25.87	26.25	25.28	25.35
1555	NYSE	NAT	Thu, Apr 1, 2004	25.30	26.31	25.29	25.87
1554	NYSE	NAT	Wed, Mar 31, 2004	26.51	26.51	25.29	25.81
1553	NYSE	NAT	Tue, Mar 30, 2004	26.51	26.86	26.25	26.66
1552	NYSE	NAT	Mon, Mar 29, 2004	25.03	26.56	24.53	26.25
1551	NYSE	NAT	Fri, Mar 26, 2004	23.78	24.59	23.69	24.27
1550	NYSE	NAT	Thu, Mar 25, 2004	22.69	23.78	22.61	23.60
1549	NYSE	NAT	Wed, Mar 24, 2004	22.29	22.68	22.20	22.59
1548	NYSE	NAT	Tue, Mar 23, 2004	22.17	22.40	21.82	22.20
1547	NYSE	NAT	Mon, Mar 22, 2004	22.32	22.40	21.79	21.97
1546	NYSE	NAT	Fri, Mar 19, 2004	21.81	22.45	21.79	22.20
1545	NYSE	NAT	Thu, Mar 18, 2004	21.11	21.81	21.11	21.78
1544	NYSE	NAT	Wed, Mar 17, 2004	20.72	21.41	20.68	21.31
1543	NYSE	NAT	Tue, Mar 16, 2004	21.61	21.61	20.32	20.68
1542	NYSE	NAT	Mon, Mar 15, 2004	21.81	22.00	21.46	21.57
1541	NYSE	NAT	Fri, Mar 12, 2004	20.47	21.51	20.35	21.36
1540	NYSE	NAT	Thu, Mar 11, 2004	21.36	21.41	19.93	20.07
1539	NYSE	NAT	Wed, Mar 10, 2004	21.61	21.98	21.31	21.42
1538	NYSE	NAT	Tue, Mar 9, 2004	21.16	22.80	20.89	21.50
1537	NYSE	NAT	Mon, Mar 8, 2004	20.52	21.00	20.31	20.90
1536	NYSE	NAT	Fri, Mar 5, 2004	19.58	20.07	19.53	20.02
1535	NYSE	NAT	Thu, Mar 4, 2004	19.23	19.58	19.03	19.57
1534	NYSE	NAT	Wed, Mar 3, 2004	19.04	19.18	18.97	19.11
1533	NYSE	NAT	Tue, Mar 2, 2004	19.33	19.38	18.98	19.18
1532	NYSE	NAT	Mon, Mar 1, 2004	19.34	19.48	19.03	19.33
1531	NYSE	NAT	Fri, Feb 27, 2004	19.08	19.17	18.86	19.09
1530	NYSE	NAT	Thu, Feb 26, 2004	18.09	18.99	18.08	18.90
1529	NYSE	NAT	Wed, Feb 25, 2004	17.71	18.09	17.71	18.08
1528	NYSE	NAT	Tue, Feb 24, 2004	17.44	17.74	17.35	17.72
1527	NYSE	NAT	Mon, Feb 23, 2004	17.56	17.70	17.36	17.44
1526	NYSE	NAT	Fri, Feb 20, 2004	17.46	17.80	17.46	17.76
1525	NYSE	NAT	Thu, Feb 19, 2004	17.68	17.73	17.45	17.47
1524	NYSE	NAT	Wed, Feb 18, 2004	17.15	17.78	17.15	17.64
1523	NYSE	NAT	Tue, Feb 17, 2004	17.64	17.64	17.02	17.20
1522	NYSE	NAT	Fri, Feb 13, 2004	18.07	18.07	17.35	17.65
1521	NYSE	NAT	Thu, Feb 12, 2004	17.85	18.09	17.85	18.08
1520	NYSE	NAT	Wed, Feb 11, 2004	17.35	17.79	17.20	17.75
1519	NYSE	NAT	Tue, Feb 10, 2004	17.10	17.41	16.87	17.36
1518	NYSE	NAT	Mon, Feb 9, 2004	16.75	17.33	16.65	16.85
1517	NYSE	NAT	Fri, Feb 6, 2004	16.45	16.85	16.45	16.52
1516	NYSE	NAT	Thu, Feb 5, 2004	16.75	16.75	15.96	16.31
1515	NYSE	NAT	Wed, Feb 4, 2004	17.01	17.14	16.06	16.75
1514	NYSE	NAT	Tue, Feb 3, 2004	17.74	17.94	16.96	17.08
1513	NYSE	NAT	Mon, Feb 2, 2004	16.11	17.35	16.11	17.35
1512	NYSE	NAT	Fri, Jan 30, 2004	15.91	16.45	15.64	15.87
1511	NYSE	NAT	Thu, Jan 29, 2004	17.02	17.27	14.87	16.16
1510	NYSE	NAT	Wed, Jan 28, 2004	18.00	18.05	17.22	17.25
1509	NYSE	NAT	Tue, Jan 27, 2004	18.24	18.38	17.99	18.10
1508	NYSE	NAT	Mon, Jan 26, 2004	18.56	18.56	16.98	18.29
1507	NYSE	NAT	Fri, Jan 23, 2004	19.58	19.82	19.48	19.81
1506	NYSE	NAT	Thu, Jan 22, 2004	19.67	19.72	19.44	19.44
1505	NYSE	NAT	Wed, Jan 21, 2004	19.31	19.82	19.23	19.72
1504	NYSE	NAT	Tue, Jan 20, 2004	18.63	19.58	18.54	19.14
1503	NYSE	NAT	Fri, Jan 16, 2004	18.24	18.83	18.14	18.19
1502	NYSE	NAT	Thu, Jan 15, 2004	17.35	18.16	17.21	18.05
1501	NYSE	NAT	Wed, Jan 14, 2004	16.12	17.34	16.12	17.15
1500	NYSE	NAT	Tue, Jan 13, 2004	15.82	16.21	15.81	16.11
1499	NYSE	NAT	Mon, Jan 12, 2004	15.76	16.07	15.69	15.82
1498	NYSE	NAT	Fri, Jan 9, 2004	15.85	15.98	15.61	15.81
1497	NYSE	NAT	Thu, Jan 8, 2004	15.46	15.85	15.46	15.84
1496	NYSE	NAT	Wed, Jan 7, 2004	15.51	15.55	15.18	15.46
1495	NYSE	NAT	Tue, Jan 6, 2004	15.55	15.55	15.17	15.21
1494	NYSE	NAT	Mon, Jan 5, 2004	15.26	15.61	15.26	15.51
1493	NYSE	NAT	Fri, Jan 2, 2004	15.02	15.30	14.87	15.07
1492	NYSE	NAT	Wed, Dec 31, 2003	14.87	15.12	14.68	14.92
1491	NYSE	NAT	Tue, Dec 30, 2003	14.72	14.92	14.62	14.87
1490	NYSE	NAT	Mon, Dec 29, 2003	14.86	15.31	14.62	14.62
1489	NYSE	NAT	Fri, Dec 26, 2003	14.62	14.87	14.48	14.86
1488	NYSE	NAT	Wed, Dec 24, 2003	14.62	14.69	14.47	14.49
1487	NYSE	NAT	Tue, Dec 23, 2003	14.57	14.72	14.42	14.57
1486	NYSE	NAT	Mon, Dec 22, 2003	14.85	14.86	14.52	14.57
1485	NYSE	NAT	Fri, Dec 19, 2003	14.63	14.86	14.62	14.77
1484	NYSE	NAT	Thu, Dec 18, 2003	14.68	14.86	14.48	14.63
1483	NYSE	NAT	Wed, Dec 17, 2003	14.29	14.62	14.29	14.62
1482	NYSE	NAT	Tue, Dec 16, 2003	14.45	14.57	14.22	14.39
1481	NYSE	NAT	Mon, Dec 15, 2003	14.83	14.85	14.17	14.32
1480	NYSE	NAT	Fri, Dec 12, 2003	14.62	14.80	14.58	14.73
1479	NYSE	NAT	Thu, Dec 11, 2003	14.42	14.65	14.38	14.62
1478	NYSE	NAT	Wed, Dec 10, 2003	14.18	14.67	14.18	14.47
1477	NYSE	NAT	Tue, Dec 9, 2003	14.17	14.36	13.98	14.18
1476	NYSE	NAT	Mon, Dec 8, 2003	14.01	14.12	13.93	14.08
1475	NYSE	NAT	Fri, Dec 5, 2003	13.88	14.02	13.79	13.96
1474	NYSE	NAT	Thu, Dec 4, 2003	13.87	14.02	13.78	13.83
1473	NYSE	NAT	Wed, Dec 3, 2003	13.88	13.88	13.63	13.76
1472	NYSE	NAT	Tue, Dec 2, 2003	13.53	13.80	13.53	13.67
1471	NYSE	NAT	Mon, Dec 1, 2003	13.14	13.63	13.13	13.39
1470	NYSE	NAT	Fri, Nov 28, 2003	13.28	13.32	12.98	13.03
1469	NYSE	NAT	Wed, Nov 26, 2003	13.21	13.27	12.99	13.25
1468	NYSE	NAT	Tue, Nov 25, 2003	13.08	13.27	12.98	13.21
1467	NYSE	NAT	Mon, Nov 24, 2003	12.94	13.07	12.90	13.03
1466	NYSE	NAT	Fri, Nov 21, 2003	12.94	12.97	12.89	12.90
1465	NYSE	NAT	Thu, Nov 20, 2003	12.89	13.08	12.79	12.92
1464	NYSE	NAT	Wed, Nov 19, 2003	13.17	13.25	12.94	12.95
1463	NYSE	NAT	Tue, Nov 18, 2003	12.93	13.18	12.93	13.09
1462	NYSE	NAT	Mon, Nov 17, 2003	12.88	13.04	12.80	12.91
1461	NYSE	NAT	Fri, Nov 14, 2003	12.78	12.84	12.69	12.79
1460	NYSE	NAT	Thu, Nov 13, 2003	12.70	12.84	12.59	12.78
1459	NYSE	NAT	Wed, Nov 12, 2003	12.69	12.77	12.44	12.60
1458	NYSE	NAT	Tue, Nov 11, 2003	12.63	12.73	12.57	12.64
1457	NYSE	NAT	Mon, Nov 10, 2003	12.83	12.84	12.60	12.73
1456	NYSE	NAT	Fri, Nov 7, 2003	12.89	12.89	12.64	12.78
1455	NYSE	NAT	Thu, Nov 6, 2003	12.79	12.79	12.70	12.73
1454	NYSE	NAT	Wed, Nov 5, 2003	12.77	12.83	12.64	12.76
1453	NYSE	NAT	Tue, Nov 4, 2003	12.19	12.75	12.19	12.75
1452	NYSE	NAT	Mon, Nov 3, 2003	12.16	12.33	12.15	12.19
1451	NYSE	NAT	Fri, Oct 31, 2003	12.40	12.45	12.23	12.24
1450	NYSE	NAT	Thu, Oct 30, 2003	11.89	12.49	11.89	12.46
1449	NYSE	NAT	Wed, Oct 29, 2003	12.79	12.86	12.30	12.54
1448	NYSE	NAT	Tue, Oct 28, 2003	12.91	13.00	12.80	12.80
1447	NYSE	NAT	Mon, Oct 27, 2003	13.06	13.07	12.89	12.91
1446	NYSE	NAT	Fri, Oct 24, 2003	13.13	13.26	13.08	13.15
1445	NYSE	NAT	Thu, Oct 23, 2003	13.13	13.27	13.00	13.12
1444	NYSE	NAT	Wed, Oct 22, 2003	12.89	13.13	12.86	13.04
1443	NYSE	NAT	Tue, Oct 21, 2003	13.13	13.13	12.64	12.79
1442	NYSE	NAT	Mon, Oct 20, 2003	13.17	13.23	13.11	13.14
1441	NYSE	NAT	Fri, Oct 17, 2003	13.08	13.26	13.05	13.17
1440	NYSE	NAT	Thu, Oct 16, 2003	13.22	13.22	12.89	13.05
1439	NYSE	NAT	Wed, Oct 15, 2003	13.27	13.36	13.08	13.22
1438	NYSE	NAT	Tue, Oct 14, 2003	13.33	13.37	13.23	13.24
1437	NYSE	NAT	Mon, Oct 13, 2003	13.08	13.32	13.08	13.27
1436	NYSE	NAT	Fri, Oct 10, 2003	12.89	13.08	12.89	13.03
1435	NYSE	NAT	Thu, Oct 9, 2003	13.08	13.14	12.93	12.94
1434	NYSE	NAT	Wed, Oct 8, 2003	12.89	13.08	12.85	13.05
1433	NYSE	NAT	Tue, Oct 7, 2003	12.68	12.88	12.54	12.78
1432	NYSE	NAT	Mon, Oct 6, 2003	12.39	12.64	12.34	12.54
1431	NYSE	NAT	Fri, Oct 3, 2003	12.15	12.69	12.15	12.25
1430	NYSE	NAT	Thu, Oct 2, 2003	13.28	13.63	11.15	12.15
1429	NYSE	NAT	Wed, Oct 1, 2003	13.69	14.25	13.48	14.18
1428	NYSE	NAT	Tue, Sep 30, 2003	14.13	14.14	13.68	13.68
1427	NYSE	NAT	Mon, Sep 29, 2003	13.99	14.17	13.88	14.17
1426	NYSE	NAT	Fri, Sep 26, 2003	14.09	14.26	13.90	13.98
1425	NYSE	NAT	Thu, Sep 25, 2003	14.12	14.25	13.99	14.08
1424	NYSE	NAT	Wed, Sep 24, 2003	13.73	14.12	13.72	14.11
1423	NYSE	NAT	Tue, Sep 23, 2003	13.39	13.88	13.39	13.76
1422	NYSE	NAT	Mon, Sep 22, 2003	13.28	13.47	13.13	13.41
1421	NYSE	NAT	Fri, Sep 19, 2003	13.29	13.37	13.09	13.22
1420	NYSE	NAT	Thu, Sep 18, 2003	13.03	13.47	13.03	13.09
1419	NYSE	NAT	Wed, Sep 17, 2003	13.28	13.31	12.92	12.98
1418	NYSE	NAT	Tue, Sep 16, 2003	13.08	13.28	12.99	13.08
1417	NYSE	NAT	Mon, Sep 15, 2003	13.18	13.47	12.98	13.07
1416	NYSE	NAT	Fri, Sep 12, 2003	13.36	13.38	13.18	13.19
1415	NYSE	NAT	Thu, Sep 11, 2003	13.59	13.61	13.28	13.36
1414	NYSE	NAT	Wed, Sep 10, 2003	13.53	13.61	13.40	13.47
1413	NYSE	NAT	Tue, Sep 9, 2003	13.73	13.73	13.33	13.34
1412	NYSE	NAT	Mon, Sep 8, 2003	13.67	13.81	13.53	13.58
1411	NYSE	NAT	Fri, Sep 5, 2003	13.63	13.72	13.63	13.72
1410	NYSE	NAT	Thu, Sep 4, 2003	13.64	13.64	13.38	13.56
1409	NYSE	NAT	Wed, Sep 3, 2003	13.53	13.70	13.30	13.67
1408	NYSE	NAT	Tue, Sep 2, 2003	13.74	13.74	13.48	13.68
1407	NYSE	NAT	Fri, Aug 29, 2003	13.82	13.82	13.68	13.73
1406	NYSE	NAT	Thu, Aug 28, 2003	13.82	13.83	13.63	13.78
1405	NYSE	NAT	Wed, Aug 27, 2003	13.83	13.83	13.63	13.73
1404	NYSE	NAT	Tue, Aug 26, 2003	13.73	13.88	13.53	13.83
1403	NYSE	NAT	Mon, Aug 25, 2003	13.81	13.87	13.38	13.68
1402	NYSE	NAT	Fri, Aug 22, 2003	13.58	13.81	13.38	13.61
1401	NYSE	NAT	Thu, Aug 21, 2003	13.63	13.82	13.40	13.40
1400	NYSE	NAT	Wed, Aug 20, 2003	13.78	13.88	13.53	13.57
1399	NYSE	NAT	Tue, Aug 19, 2003	13.79	13.93	13.77	13.79
1398	NYSE	NAT	Mon, Aug 18, 2003	13.94	13.94	13.73	13.83
1397	NYSE	NAT	Fri, Aug 15, 2003	13.93	13.93	13.93	13.93
1396	NYSE	NAT	Thu, Aug 14, 2003	13.63	13.88	13.63	13.87
1395	NYSE	NAT	Wed, Aug 13, 2003	13.88	14.03	13.68	13.68
1394	NYSE	NAT	Tue, Aug 12, 2003	13.98	14.01	13.78	13.78
1393	NYSE	NAT	Mon, Aug 11, 2003	13.60	14.03	13.60	13.82
1392	NYSE	NAT	Fri, Aug 8, 2003	13.63	14.08	13.50	13.50
1391	NYSE	NAT	Thu, Aug 7, 2003	13.38	13.48	13.23	13.43
1390	NYSE	NAT	Wed, Aug 6, 2003	13.51	13.51	13.09	13.18
1389	NYSE	NAT	Tue, Aug 5, 2003	13.70	13.87	13.52	13.53
1388	NYSE	NAT	Mon, Aug 4, 2003	13.73	14.03	13.48	13.50
1387	NYSE	NAT	Fri, Aug 1, 2003	13.78	13.83	13.48	13.58
1386	NYSE	NAT	Thu, Jul 31, 2003	14.12	14.22	13.88	13.89
1385	NYSE	NAT	Wed, Jul 30, 2003	14.12	14.12	13.99	14.12
1384	NYSE	NAT	Tue, Jul 29, 2003	14.36	14.36	13.98	14.06
1383	NYSE	NAT	Mon, Jul 28, 2003	13.98	14.37	13.88	14.36
1382	NYSE	NAT	Fri, Jul 25, 2003	14.27	14.27	13.58	14.13
1381	NYSE	NAT	Thu, Jul 24, 2003	14.82	14.96	14.35	14.61
1380	NYSE	NAT	Wed, Jul 23, 2003	15.48	15.61	15.47	15.60
1379	NYSE	NAT	Tue, Jul 22, 2003	15.61	15.66	15.46	15.47
1378	NYSE	NAT	Mon, Jul 21, 2003	15.65	15.66	15.48	15.66
1377	NYSE	NAT	Fri, Jul 18, 2003	15.55	15.65	15.41	15.46
1376	NYSE	NAT	Thu, Jul 17, 2003	15.46	15.61	15.21	15.40
1375	NYSE	NAT	Wed, Jul 16, 2003	15.37	15.55	15.29	15.46
1374	NYSE	NAT	Tue, Jul 15, 2003	15.54	15.61	15.24	15.40
1373	NYSE	NAT	Mon, Jul 14, 2003	15.56	15.56	15.40	15.51
1372	NYSE	NAT	Fri, Jul 11, 2003	15.17	15.59	15.07	15.59
1371	NYSE	NAT	Thu, Jul 10, 2003	15.48	15.48	15.06	15.26
1370	NYSE	NAT	Wed, Jul 9, 2003	15.26	15.46	15.17	15.46
1369	NYSE	NAT	Tue, Jul 8, 2003	15.11	15.34	15.07	15.16
1368	NYSE	NAT	Mon, Jul 7, 2003	14.65	14.99	14.65	14.97
1367	NYSE	NAT	Thu, Jul 3, 2003	14.62	14.66	14.48	14.53
1366	NYSE	NAT	Wed, Jul 2, 2003	14.27	14.66	14.27	14.66
1365	NYSE	NAT	Tue, Jul 1, 2003	14.08	14.25	13.79	14.25
1364	NYSE	NAT	Mon, Jun 30, 2003	14.12	14.42	13.98	14.08
1363	NYSE	NAT	Fri, Jun 27, 2003	13.91	14.22	13.88	14.12
1362	NYSE	NAT	Thu, Jun 26, 2003	12.97	13.79	12.97	13.68
1361	NYSE	NAT	Wed, Jun 25, 2003	14.17	14.17	12.91	12.97
1360	NYSE	NAT	Tue, Jun 24, 2003	15.86	15.86	14.37	14.65
1359	NYSE	NAT	Mon, Jun 23, 2003	16.06	16.10	15.81	15.82
1358	NYSE	NAT	Fri, Jun 20, 2003	16.11	16.11	15.71	15.86
1357	NYSE	NAT	Thu, Jun 19, 2003	15.81	15.89	15.63	15.76
1356	NYSE	NAT	Wed, Jun 18, 2003	15.81	15.86	15.46	15.71
1355	NYSE	NAT	Tue, Jun 17, 2003	15.97	16.06	15.77	15.86
1354	NYSE	NAT	Mon, Jun 16, 2003	15.86	16.06	15.76	16.05
1353	NYSE	NAT	Fri, Jun 13, 2003	15.57	16.25	15.36	15.70
1352	NYSE	NAT	Thu, Jun 12, 2003	16.26	16.26	15.51	15.57
1351	NYSE	NAT	Wed, Jun 11, 2003	16.21	16.31	16.08	16.26
1350	NYSE	NAT	Tue, Jun 10, 2003	16.04	16.21	15.98	16.15
1349	NYSE	NAT	Mon, Jun 9, 2003	16.06	16.21	15.96	16.14
1348	NYSE	NAT	Fri, Jun 6, 2003	16.06	16.24	15.62	15.86
1347	NYSE	NAT	Thu, Jun 5, 2003	16.11	16.16	15.76	15.85
1346	NYSE	NAT	Wed, Jun 4, 2003	15.21	16.11	15.21	16.05
1345	NYSE	NAT	Tue, Jun 3, 2003	15.56	15.72	15.08	15.36
1344	NYSE	NAT	Mon, Jun 2, 2003	15.50	15.50	15.22	15.36
1343	NYSE	NAT	Fri, May 30, 2003	15.07	15.30	14.78	15.21
1342	NYSE	NAT	Thu, May 29, 2003	15.89	15.91	14.57	15.07
1341	NYSE	NAT	Wed, May 28, 2003	16.75	16.75	15.88	15.89
1340	NYSE	NAT	Tue, May 27, 2003	16.26	16.74	16.07	16.60
1339	NYSE	NAT	Fri, May 23, 2003	15.76	16.10	15.71	16.01
1338	NYSE	NAT	Thu, May 22, 2003	15.20	15.76	15.12	15.52
1337	NYSE	NAT	Wed, May 21, 2003	15.06	15.16	14.93	15.00
1336	NYSE	NAT	Tue, May 20, 2003	14.77	14.97	14.69	14.97
1335	NYSE	NAT	Mon, May 19, 2003	14.80	14.85	14.67	14.67
1334	NYSE	NAT	Fri, May 16, 2003	14.83	14.86	14.68	14.68
1333	NYSE	NAT	Thu, May 15, 2003	14.72	14.82	14.49	14.58
1332	NYSE	NAT	Wed, May 14, 2003	14.62	14.62	14.33	14.49
1331	NYSE	NAT	Tue, May 13, 2003	14.42	14.52	14.22	14.41
1330	NYSE	NAT	Mon, May 12, 2003	14.06	14.42	13.93	14.22
1329	NYSE	NAT	Fri, May 9, 2003	14.17	14.17	13.63	13.83
1328	NYSE	NAT	Thu, May 8, 2003	14.03	14.07	13.98	13.98
1327	NYSE	NAT	Wed, May 7, 2003	14.08	14.08	13.90	13.97
1326	NYSE	NAT	Tue, May 6, 2003	14.00	14.03	13.93	13.98
1325	NYSE	NAT	Mon, May 5, 2003	13.63	14.00	13.58	13.92
1324	NYSE	NAT	Fri, May 2, 2003	13.38	13.49	13.27	13.33
1323	NYSE	NAT	Thu, May 1, 2003	13.49	13.58	13.15	13.26
1322	NYSE	NAT	Wed, Apr 30, 2003	13.58	13.67	13.40	13.53
1321	NYSE	NAT	Tue, Apr 29, 2003	13.62	13.68	13.39	13.52
1320	NYSE	NAT	Mon, Apr 28, 2003	13.68	13.68	12.89	13.62
1319	NYSE	NAT	Fri, Apr 25, 2003	13.89	13.93	13.68	13.73
1318	NYSE	NAT	Thu, Apr 24, 2003	14.01	14.07	13.89	13.93
1317	NYSE	NAT	Wed, Apr 23, 2003	13.83	14.08	13.73	13.99
1316	NYSE	NAT	Tue, Apr 22, 2003	14.87	15.02	14.87	14.96
1315	NYSE	NAT	Mon, Apr 21, 2003	14.82	15.06	14.67	14.87
1314	NYSE	NAT	Thu, Apr 17, 2003	14.57	14.77	14.50	14.67
1313	NYSE	NAT	Wed, Apr 16, 2003	14.55	14.62	14.41	14.56
1312	NYSE	NAT	Tue, Apr 15, 2003	14.37	14.57	14.37	14.51
1311	NYSE	NAT	Mon, Apr 14, 2003	14.57	14.57	14.32	14.37
1310	NYSE	NAT	Fri, Apr 11, 2003	14.47	14.52	14.27	14.49
1309	NYSE	NAT	Thu, Apr 10, 2003	13.73	14.27	13.73	14.22
1308	NYSE	NAT	Wed, Apr 9, 2003	13.83	13.88	13.49	13.58
1307	NYSE	NAT	Tue, Apr 8, 2003	13.85	13.85	13.59	13.73
1306	NYSE	NAT	Mon, Apr 7, 2003	13.87	13.93	13.48	13.75
1305	NYSE	NAT	Fri, Apr 4, 2003	13.68	13.88	13.67	13.82
1304	NYSE	NAT	Thu, Apr 3, 2003	13.92	13.93	13.73	13.77
1303	NYSE	NAT	Wed, Apr 2, 2003	13.92	14.11	13.64	13.88
1302	NYSE	NAT	Tue, Apr 1, 2003	13.93	14.08	13.91	13.91
1301	NYSE	NAT	Mon, Mar 31, 2003	13.98	14.11	13.93	13.93
1300	NYSE	NAT	Fri, Mar 28, 2003	14.00	14.00	13.84	13.90
1299	NYSE	NAT	Thu, Mar 27, 2003	14.08	14.17	13.96	14.02
1298	NYSE	NAT	Wed, Mar 26, 2003	14.08	14.12	13.89	14.12
1297	NYSE	NAT	Tue, Mar 25, 2003	13.53	13.98	13.53	13.89
1296	NYSE	NAT	Mon, Mar 24, 2003	13.58	13.98	13.47	13.47
1295	NYSE	NAT	Fri, Mar 21, 2003	14.08	14.08	13.73	13.78
1294	NYSE	NAT	Thu, Mar 20, 2003	14.04	14.12	13.98	14.12
1293	NYSE	NAT	Wed, Mar 19, 2003	14.03	14.09	14.03	14.08
1292	NYSE	NAT	Tue, Mar 18, 2003	14.12	14.13	13.89	14.11
1291	NYSE	NAT	Mon, Mar 17, 2003	13.98	14.19	13.88	14.18
1290	NYSE	NAT	Fri, Mar 14, 2003	14.12	14.12	13.78	13.88
1289	NYSE	NAT	Thu, Mar 13, 2003	14.12	14.17	13.93	14.12
1288	NYSE	NAT	Wed, Mar 12, 2003	14.16	14.16	13.98	14.12
1287	NYSE	NAT	Tue, Mar 11, 2003	14.04	14.26	13.73	14.19
1286	NYSE	NAT	Mon, Mar 10, 2003	14.25	14.26	14.08	14.13
1285	NYSE	NAT	Fri, Mar 7, 2003	14.08	14.17	13.88	14.14
1284	NYSE	NAT	Thu, Mar 6, 2003	14.12	14.26	14.08	14.17
1283	NYSE	NAT	Wed, Mar 5, 2003	14.03	14.37	13.89	14.22
1282	NYSE	NAT	Tue, Mar 4, 2003	14.11	14.12	13.89	14.08
1281	NYSE	NAT	Mon, Mar 3, 2003	13.68	14.12	13.68	14.08
1280	NYSE	NAT	Fri, Feb 28, 2003	13.39	13.87	13.28	13.63
1279	NYSE	NAT	Thu, Feb 27, 2003	13.06	13.48	13.06	13.46
1278	NYSE	NAT	Wed, Feb 26, 2003	13.13	13.18	12.90	12.96
1277	NYSE	NAT	Tue, Feb 25, 2003	13.68	13.68	13.04	13.13
1276	NYSE	NAT	Mon, Feb 24, 2003	13.78	13.83	13.38	13.68
1275	NYSE	NAT	Fri, Feb 21, 2003	13.87	13.87	13.68	13.68
1274	NYSE	NAT	Thu, Feb 20, 2003	13.80	13.87	13.69	13.78
1273	NYSE	NAT	Wed, Feb 19, 2003	13.35	13.88	13.29	13.79
1272	NYSE	NAT	Tue, Feb 18, 2003	13.28	13.33	13.04	13.33
1271	NYSE	NAT	Fri, Feb 14, 2003	12.94	13.32	12.80	13.08
1270	NYSE	NAT	Thu, Feb 13, 2003	12.81	12.96	12.69	12.88
1269	NYSE	NAT	Wed, Feb 12, 2003	12.79	12.94	12.70	12.88
1268	NYSE	NAT	Tue, Feb 11, 2003	12.89	13.07	12.70	12.88
1267	NYSE	NAT	Mon, Feb 10, 2003	12.94	12.96	12.77	12.89
1266	NYSE	NAT	Fri, Feb 7, 2003	13.03	13.06	12.79	12.87
1265	NYSE	NAT	Thu, Feb 6, 2003	12.89	13.03	12.89	13.03
1264	NYSE	NAT	Wed, Feb 5, 2003	13.16	13.16	12.90	12.91
1263	NYSE	NAT	Tue, Feb 4, 2003	12.89	13.35	12.80	13.23
1262	NYSE	NAT	Mon, Feb 3, 2003	13.48	13.55	12.51	12.79
1261	NYSE	NAT	Fri, Jan 31, 2003	13.50	13.93	13.48	13.48
1260	NYSE	NAT	Thu, Jan 30, 2003	13.88	14.17	13.88	14.12
1259	NYSE	NAT	Wed, Jan 29, 2003	14.08	14.12	13.58	13.87
1258	NYSE	NAT	Tue, Jan 28, 2003	14.12	14.16	13.99	14.01
1257	NYSE	NAT	Mon, Jan 27, 2003	14.17	14.26	13.98	14.12
1256	NYSE	NAT	Fri, Jan 24, 2003	14.27	14.41	14.12	14.27
1255	NYSE	NAT	Thu, Jan 23, 2003	13.98	14.37	13.88	14.33
1254	NYSE	NAT	Wed, Jan 22, 2003	14.37	14.37	13.98	13.98
1253	NYSE	NAT	Tue, Jan 21, 2003	14.17	14.52	14.17	14.37
1252	NYSE	NAT	Fri, Jan 17, 2003	14.37	14.47	14.37	14.37
1251	NYSE	NAT	Thu, Jan 16, 2003	14.19	14.47	14.19	14.42
1250	NYSE	NAT	Wed, Jan 15, 2003	14.15	14.34	14.08	14.22
1249	NYSE	NAT	Tue, Jan 14, 2003	14.11	14.14	13.88	14.12
1248	NYSE	NAT	Mon, Jan 13, 2003	14.11	14.12	14.06	14.06
1247	NYSE	NAT	Fri, Jan 10, 2003	14.12	14.12	14.04	14.04
1246	NYSE	NAT	Thu, Jan 9, 2003	14.08	14.12	13.98	14.12
1245	NYSE	NAT	Wed, Jan 8, 2003	13.90	14.11	13.90	14.03
1244	NYSE	NAT	Tue, Jan 7, 2003	13.58	13.86	13.58	13.80
1243	NYSE	NAT	Mon, Jan 6, 2003	13.36	13.73	13.36	13.68
1242	NYSE	NAT	Fri, Jan 3, 2003	13.48	13.53	13.23	13.38
1241	NYSE	NAT	Thu, Jan 2, 2003	13.22	13.73	13.22	13.63
1240	NYSE	NAT	Tue, Dec 31, 2002	13.43	13.44	12.81	13.42
1239	NYSE	NAT	Mon, Dec 30, 2002	13.38	13.55	13.08	13.33
1238	NYSE	NAT	Fri, Dec 27, 2002	13.38	13.52	13.29	13.43
1237	NYSE	NAT	Thu, Dec 26, 2002	13.61	13.70	13.33	13.39
1236	NYSE	NAT	Tue, Dec 24, 2002	13.20	13.58	13.11	13.58
1235	NYSE	NAT	Mon, Dec 23, 2002	13.08	13.34	13.08	13.34
1234	NYSE	NAT	Fri, Dec 20, 2002	13.03	13.36	12.99	13.18
1233	NYSE	NAT	Thu, Dec 19, 2002	12.91	13.13	12.64	13.13
1232	NYSE	NAT	Wed, Dec 18, 2002	12.98	12.98	12.79	12.91
1231	NYSE	NAT	Tue, Dec 17, 2002	12.19	12.99	12.19	12.90
1230	NYSE	NAT	Mon, Dec 16, 2002	12.24	12.39	12.04	12.14
1229	NYSE	NAT	Fri, Dec 13, 2002	12.34	12.44	12.17	12.25
1228	NYSE	NAT	Thu, Dec 12, 2002	12.64	12.83	12.24	12.28
1227	NYSE	NAT	Wed, Dec 11, 2002	12.64	12.90	12.64	12.70
1226	NYSE	NAT	Tue, Dec 10, 2002	12.24	12.64	12.21	12.64
1225	NYSE	NAT	Mon, Dec 9, 2002	11.90	12.39	11.90	12.34
1224	NYSE	NAT	Fri, Dec 6, 2002	11.80	12.40	11.71	11.89
1223	NYSE	NAT	Thu, Dec 5, 2002	11.73	11.88	11.70	11.88
1222	NYSE	NAT	Wed, Dec 4, 2002	11.90	12.04	11.75	11.89
1221	NYSE	NAT	Tue, Dec 3, 2002	11.64	12.08	11.63	11.98
1220	NYSE	NAT	Mon, Dec 2, 2002	11.49	11.89	11.49	11.73
1219	NYSE	NAT	Fri, Nov 29, 2002	11.57	11.57	11.40	11.49
1218	NYSE	NAT	Wed, Nov 27, 2002	11.49	11.58	11.46	11.57
1217	NYSE	NAT	Tue, Nov 26, 2002	11.60	11.66	11.42	11.59
1216	NYSE	NAT	Mon, Nov 25, 2002	12.44	12.49	11.70	11.80
1215	NYSE	NAT	Fri, Nov 22, 2002	12.54	12.74	12.45	12.48
1214	NYSE	NAT	Thu, Nov 21, 2002	12.49	12.64	12.49	12.49
1213	NYSE	NAT	Wed, Nov 20, 2002	12.49	12.66	12.44	12.49
1212	NYSE	NAT	Tue, Nov 19, 2002	12.49	12.49	11.89	12.44
1211	NYSE	NAT	Mon, Nov 18, 2002	12.54	12.61	12.20	12.49
1210	NYSE	NAT	Fri, Nov 15, 2002	12.68	12.68	12.39	12.54
1209	NYSE	NAT	Thu, Nov 14, 2002	12.14	12.68	12.09	12.68
1208	NYSE	NAT	Wed, Nov 13, 2002	11.99	12.18	11.81	12.14
1207	NYSE	NAT	Tue, Nov 12, 2002	11.70	12.05	11.65	12.05
1206	NYSE	NAT	Mon, Nov 11, 2002	11.89	11.89	11.75	11.81
1205	NYSE	NAT	Fri, Nov 8, 2002	11.30	11.89	11.30	11.87
1204	NYSE	NAT	Thu, Nov 7, 2002	10.56	11.25	10.47	11.25
1203	NYSE	NAT	Wed, Nov 6, 2002	10.56	10.70	10.56	10.63
1202	NYSE	NAT	Tue, Nov 5, 2002	10.66	10.70	10.56	10.70
1201	NYSE	NAT	Mon, Nov 4, 2002	10.56	10.67	10.52	10.66
1200	NYSE	NAT	Fri, Nov 1, 2002	10.51	10.61	10.47	10.61
1199	NYSE	NAT	Thu, Oct 31, 2002	10.51	10.61	10.51	10.51
1198	NYSE	NAT	Wed, Oct 30, 2002	10.61	10.61	10.31	10.47
1197	NYSE	NAT	Tue, Oct 29, 2002	10.70	10.70	10.36	10.65
1196	NYSE	NAT	Mon, Oct 28, 2002	10.51	10.80	10.41	10.70
1195	NYSE	NAT	Fri, Oct 25, 2002	10.51	10.56	10.31	10.42
1194	NYSE	NAT	Thu, Oct 24, 2002	10.21	10.41	10.16	10.41
1193	NYSE	NAT	Wed, Oct 23, 2002	10.16	10.17	10.11	10.16
1192	NYSE	NAT	Tue, Oct 22, 2002	10.95	10.95	10.31	10.41
1191	NYSE	NAT	Mon, Oct 21, 2002	10.81	10.90	10.80	10.90
1190	NYSE	NAT	Fri, Oct 18, 2002	10.67	10.89	10.67	10.80
1189	NYSE	NAT	Thu, Oct 17, 2002	10.66	10.70	10.51	10.67
1188	NYSE	NAT	Wed, Oct 16, 2002	10.36	10.56	10.21	10.56
1187	NYSE	NAT	Tue, Oct 15, 2002	10.16	10.61	10.16	10.31
1186	NYSE	NAT	Mon, Oct 14, 2002	10.32	10.41	10.11	10.21
1185	NYSE	NAT	Fri, Oct 11, 2002	10.31	10.42	10.11	10.22
1184	NYSE	NAT	Thu, Oct 10, 2002	10.36	10.42	10.02	10.15
1183	NYSE	NAT	Wed, Oct 9, 2002	10.31	10.50	10.17	10.41
1182	NYSE	NAT	Tue, Oct 8, 2002	10.41	10.50	10.31	10.41
1181	NYSE	NAT	Mon, Oct 7, 2002	10.36	10.51	10.27	10.41
1180	NYSE	NAT	Fri, Oct 4, 2002	10.46	10.60	10.41	10.41
1179	NYSE	NAT	Thu, Oct 3, 2002	10.50	10.61	10.36	10.59
1178	NYSE	NAT	Wed, Oct 2, 2002	10.56	10.56	10.46	10.46
1177	NYSE	NAT	Tue, Oct 1, 2002	10.53	10.53	10.41	10.47
1176	NYSE	NAT	Mon, Sep 30, 2002	10.61	10.65	10.46	10.53
1175	NYSE	NAT	Fri, Sep 27, 2002	10.56	10.56	10.46	10.51
1174	NYSE	NAT	Thu, Sep 26, 2002	10.46	10.50	10.31	10.46
1173	NYSE	NAT	Wed, Sep 25, 2002	10.31	10.46	9.91	10.46
1172	NYSE	NAT	Tue, Sep 24, 2002	10.51	10.56	10.27	10.32
1171	NYSE	NAT	Mon, Sep 23, 2002	10.86	10.90	10.56	10.59
1170	NYSE	NAT	Fri, Sep 20, 2002	11.05	11.05	10.90	10.91
1169	NYSE	NAT	Thu, Sep 19, 2002	11.01	11.01	10.92	10.93
1168	NYSE	NAT	Wed, Sep 18, 2002	11.09	11.19	10.96	10.96
1167	NYSE	NAT	Tue, Sep 17, 2002	11.22	11.46	11.11	11.17
1166	NYSE	NAT	Mon, Sep 16, 2002	10.91	11.27	10.91	11.27
1165	NYSE	NAT	Fri, Sep 13, 2002	11.20	11.20	11.05	11.05
1164	NYSE	NAT	Thu, Sep 12, 2002	11.07	11.39	11.07	11.26
1163	NYSE	NAT	Wed, Sep 11, 2002	11.20	11.29	11.11	11.17
1162	NYSE	NAT	Tue, Sep 10, 2002	11.21	11.40	11.20	11.20
1161	NYSE	NAT	Mon, Sep 9, 2002	11.50	11.50	11.22	11.22
1160	NYSE	NAT	Fri, Sep 6, 2002	11.15	11.40	11.15	11.40
1159	NYSE	NAT	Thu, Sep 5, 2002	11.00	11.10	10.90	11.05
1158	NYSE	NAT	Wed, Sep 4, 2002	10.93	11.15	10.93	11.10
1157	NYSE	NAT	Tue, Sep 3, 2002	11.05	11.20	10.92	10.92
1156	NYSE	NAT	Fri, Aug 30, 2002	11.15	11.35	11.15	11.20
1155	NYSE	NAT	Thu, Aug 29, 2002	11.30	11.40	11.05	11.06
1154	NYSE	NAT	Wed, Aug 28, 2002	11.28	11.35	11.01	11.35
1153	NYSE	NAT	Tue, Aug 27, 2002	11.25	11.50	11.22	11.38
1152	NYSE	NAT	Mon, Aug 26, 2002	11.30	11.40	11.00	11.40
1151	NYSE	NAT	Fri, Aug 23, 2002	11.45	11.55	11.06	11.29
1150	NYSE	NAT	Thu, Aug 22, 2002	11.00	11.60	11.00	11.55
1149	NYSE	NAT	Wed, Aug 21, 2002	11.05	11.20	10.91	10.95
1148	NYSE	NAT	Tue, Aug 20, 2002	11.01	11.19	11.01	11.02
1147	NYSE	NAT	Mon, Aug 19, 2002	11.11	11.30	11.06	11.06
1146	NYSE	NAT	Fri, Aug 16, 2002	11.21	11.35	11.05	11.11
1145	NYSE	NAT	Thu, Aug 15, 2002	11.39	11.39	11.11	11.30
1144	NYSE	NAT	Wed, Aug 14, 2002	11.10	11.39	11.10	11.39
1143	NYSE	NAT	Tue, Aug 13, 2002	11.15	11.19	11.10	11.10
1142	NYSE	NAT	Mon, Aug 12, 2002	11.44	11.44	11.15	11.24
1141	NYSE	NAT	Fri, Aug 9, 2002	11.75	11.83	11.22	11.34
1140	NYSE	NAT	Thu, Aug 8, 2002	11.10	11.55	11.10	11.55
1139	NYSE	NAT	Wed, Aug 7, 2002	11.75	11.84	11.10	11.10
1138	NYSE	NAT	Tue, Aug 6, 2002	11.84	11.84	11.65	11.71
1137	NYSE	NAT	Mon, Aug 5, 2002	11.33	11.80	11.30	11.70
1136	NYSE	NAT	Fri, Aug 2, 2002	11.40	11.40	10.91	11.23
1135	NYSE	NAT	Thu, Aug 1, 2002	11.50	11.60	11.40	11.45
1134	NYSE	NAT	Wed, Jul 31, 2002	11.50	11.88	11.40	11.70
1133	NYSE	NAT	Tue, Jul 30, 2002	10.80	11.40	10.52	11.40
1132	NYSE	NAT	Mon, Jul 29, 2002	10.70	11.40	10.65	10.65
1131	NYSE	NAT	Fri, Jul 26, 2002	11.25	11.55	10.21	10.56
1130	NYSE	NAT	Thu, Jul 25, 2002	11.89	11.99	11.05	11.24
1129	NYSE	NAT	Wed, Jul 24, 2002	10.97	11.89	9.77	11.89
1128	NYSE	NAT	Tue, Jul 23, 2002	13.13	13.13	11.57	11.80
1127	NYSE	NAT	Mon, Jul 22, 2002	13.28	13.28	13.04	13.22
1126	NYSE	NAT	Fri, Jul 19, 2002	13.48	13.53	13.38	13.38
1125	NYSE	NAT	Thu, Jul 18, 2002	13.48	13.53	13.43	13.48
1124	NYSE	NAT	Wed, Jul 17, 2002	13.57	13.67	13.43	13.53
1123	NYSE	NAT	Tue, Jul 16, 2002	13.57	13.67	13.45	13.45
1122	NYSE	NAT	Mon, Jul 15, 2002	13.58	13.70	13.46	13.57
1121	NYSE	NAT	Fri, Jul 12, 2002	13.52	13.77	13.40	13.48
1120	NYSE	NAT	Thu, Jul 11, 2002	13.64	13.74	13.38	13.52
1119	NYSE	NAT	Wed, Jul 10, 2002	13.43	13.83	13.43	13.64
1118	NYSE	NAT	Tue, Jul 9, 2002	13.88	13.92	13.45	13.56
1117	NYSE	NAT	Mon, Jul 8, 2002	13.75	13.97	13.74	13.80
1116	NYSE	NAT	Fri, Jul 5, 2002	13.70	13.88	13.70	13.83
1115	NYSE	NAT	Wed, Jul 3, 2002	13.49	13.86	13.49	13.80
1114	NYSE	NAT	Tue, Jul 2, 2002	13.63	14.12	13.40	13.44
1113	NYSE	NAT	Mon, Jul 1, 2002	13.49	13.98	13.39	13.70
1112	NYSE	NAT	Fri, Jun 28, 2002	13.53	14.03	13.40	13.53
1111	NYSE	NAT	Thu, Jun 27, 2002	14.03	14.03	13.38	13.58
1110	NYSE	NAT	Wed, Jun 26, 2002	13.58	14.12	13.48	14.11
1109	NYSE	NAT	Tue, Jun 25, 2002	13.88	13.88	13.43	13.63
1108	NYSE	NAT	Mon, Jun 24, 2002	13.79	14.03	13.59	13.73
1107	NYSE	NAT	Fri, Jun 21, 2002	13.70	13.88	13.59	13.59
1106	NYSE	NAT	Thu, Jun 20, 2002	13.77	13.83	13.58	13.83
1105	NYSE	NAT	Wed, Jun 19, 2002	13.48	13.73	13.39	13.67
1104	NYSE	NAT	Tue, Jun 18, 2002	13.67	13.78	13.39	13.41
1103	NYSE	NAT	Mon, Jun 17, 2002	13.53	13.68	13.39	13.50
1102	NYSE	NAT	Fri, Jun 14, 2002	13.88	13.88	13.39	13.53
1101	NYSE	NAT	Thu, Jun 13, 2002	13.54	14.08	13.54	13.93
1100	NYSE	NAT	Wed, Jun 12, 2002	13.68	13.77	13.43	13.64
1099	NYSE	NAT	Tue, Jun 11, 2002	14.08	14.26	13.78	13.88
1098	NYSE	NAT	Mon, Jun 10, 2002	14.37	14.72	14.08	14.08
1097	NYSE	NAT	Fri, Jun 7, 2002	14.12	14.47	13.98	14.47
1096	NYSE	NAT	Thu, Jun 6, 2002	14.27	14.36	13.88	14.17
1095	NYSE	NAT	Wed, Jun 5, 2002	14.48	14.52	14.27	14.37
1094	NYSE	NAT	Tue, Jun 4, 2002	14.72	14.86	14.42	14.47
1093	NYSE	NAT	Mon, Jun 3, 2002	14.38	14.96	14.38	14.96
1092	NYSE	NAT	Fri, May 31, 2002	14.17	14.52	14.17	14.33
1091	NYSE	NAT	Thu, May 30, 2002	14.48	14.48	14.03	14.22
1090	NYSE	NAT	Wed, May 29, 2002	14.87	14.87	14.47	14.63
1089	NYSE	NAT	Tue, May 28, 2002	14.72	15.05	14.72	14.90
1088	NYSE	NAT	Fri, May 24, 2002	14.47	14.87	14.27	14.77
1087	NYSE	NAT	Thu, May 23, 2002	13.98	14.47	13.88	14.47
1086	NYSE	NAT	Wed, May 22, 2002	13.89	14.03	13.86	14.02
1085	NYSE	NAT	Tue, May 21, 2002	13.75	14.12	13.63	13.98
1084	NYSE	NAT	Mon, May 20, 2002	13.88	13.96	13.63	13.87
1083	NYSE	NAT	Fri, May 17, 2002	13.75	13.93	13.75	13.87
1082	NYSE	NAT	Thu, May 16, 2002	13.68	13.98	13.58	13.75
1081	NYSE	NAT	Wed, May 15, 2002	13.53	13.88	13.43	13.58
1080	NYSE	NAT	Tue, May 14, 2002	13.48	13.88	13.44	13.63
1079	NYSE	NAT	Mon, May 13, 2002	13.58	13.68	13.48	13.48
1078	NYSE	NAT	Fri, May 10, 2002	13.89	14.03	13.58	13.68
1077	NYSE	NAT	Thu, May 9, 2002	13.98	13.98	13.73	13.88
1076	NYSE	NAT	Wed, May 8, 2002	13.93	14.02	13.54	13.91
1075	NYSE	NAT	Tue, May 7, 2002	13.73	13.97	13.58	13.74
1074	NYSE	NAT	Mon, May 6, 2002	13.73	13.92	13.70	13.78
1073	NYSE	NAT	Fri, May 3, 2002	13.88	14.03	13.64	13.88
1072	NYSE	NAT	Thu, May 2, 2002	14.12	14.12	13.88	14.03
1071	NYSE	NAT	Wed, May 1, 2002	14.36	14.36	14.00	14.03
1070	NYSE	NAT	Tue, Apr 30, 2002	13.81	14.32	13.70	14.32
1069	NYSE	NAT	Mon, Apr 29, 2002	14.47	14.57	13.79	13.81
1068	NYSE	NAT	Fri, Apr 26, 2002	14.92	14.96	14.52	14.57
1067	NYSE	NAT	Thu, Apr 25, 2002	15.02	15.02	14.83	14.96
1066	NYSE	NAT	Wed, Apr 24, 2002	15.26	15.36	14.87	15.16
1065	NYSE	NAT	Tue, Apr 23, 2002	15.46	15.56	15.36	15.46
1064	NYSE	NAT	Mon, Apr 22, 2002	15.56	15.56	15.18	15.36
1063	NYSE	NAT	Fri, Apr 19, 2002	15.11	15.56	15.11	15.46
1062	NYSE	NAT	Thu, Apr 18, 2002	15.12	15.46	15.12	15.17
1061	NYSE	NAT	Wed, Apr 17, 2002	15.00	15.11	15.00	15.09
1060	NYSE	NAT	Tue, Apr 16, 2002	14.82	15.11	14.79	15.11
1059	NYSE	NAT	Mon, Apr 15, 2002	15.17	15.17	14.72	14.76
1058	NYSE	NAT	Fri, Apr 12, 2002	15.46	15.46	15.02	15.17
1057	NYSE	NAT	Thu, Apr 11, 2002	15.46	15.51	15.36	15.46
1056	NYSE	NAT	Wed, Apr 10, 2002	15.61	15.66	15.36	15.36
1055	NYSE	NAT	Tue, Apr 9, 2002	15.51	15.80	15.41	15.66
1054	NYSE	NAT	Mon, Apr 8, 2002	15.52	15.65	15.26	15.35
1053	NYSE	NAT	Fri, Apr 5, 2002	15.81	15.81	14.88	15.52
1052	NYSE	NAT	Thu, Apr 4, 2002	15.86	16.06	15.76	15.96
1051	NYSE	NAT	Wed, Apr 3, 2002	15.86	16.10	15.82	15.82
1050	NYSE	NAT	Tue, Apr 2, 2002	16.40	16.40	15.76	15.96
1049	NYSE	NAT	Mon, Apr 1, 2002	15.21	16.01	15.12	15.96
1048	NYSE	NAT	Thu, Mar 28, 2002	15.06	15.14	14.88	15.14
1047	NYSE	NAT	Wed, Mar 27, 2002	15.07	15.07	14.52	15.03
1046	NYSE	NAT	Tue, Mar 26, 2002	15.02	15.21	14.82	14.97
1045	NYSE	NAT	Mon, Mar 25, 2002	15.17	15.17	14.97	15.01
1044	NYSE	NAT	Fri, Mar 22, 2002	14.77	15.12	14.77	14.83
1043	NYSE	NAT	Thu, Mar 21, 2002	15.12	15.21	14.77	14.77
1042	NYSE	NAT	Wed, Mar 20, 2002	15.12	15.16	14.87	15.02
1041	NYSE	NAT	Tue, Mar 19, 2002	14.77	15.36	14.77	15.12
1040	NYSE	NAT	Mon, Mar 18, 2002	14.57	14.82	14.57	14.67
1039	NYSE	NAT	Fri, Mar 15, 2002	14.62	14.72	14.32	14.52
1038	NYSE	NAT	Thu, Mar 14, 2002	14.67	14.86	14.37	14.49
1037	NYSE	NAT	Wed, Mar 13, 2002	14.37	14.87	14.22	14.67
1036	NYSE	NAT	Tue, Mar 12, 2002	13.83	14.42	13.73	14.37
1035	NYSE	NAT	Mon, Mar 11, 2002	13.58	13.88	13.58	13.75
1034	NYSE	NAT	Fri, Mar 8, 2002	13.68	13.68	13.48	13.58
1033	NYSE	NAT	Thu, Mar 7, 2002	13.38	13.98	13.28	13.58
1032	NYSE	NAT	Wed, Mar 6, 2002	13.33	13.46	13.23	13.29
1031	NYSE	NAT	Tue, Mar 5, 2002	13.39	13.58	13.28	13.35
1030	NYSE	NAT	Mon, Mar 4, 2002	13.58	13.58	13.38	13.39
1029	NYSE	NAT	Fri, Mar 1, 2002	13.43	13.53	13.28	13.50
1028	NYSE	NAT	Thu, Feb 28, 2002	13.23	13.38	13.23	13.37
1027	NYSE	NAT	Wed, Feb 27, 2002	13.23	13.23	13.05	13.08
1026	NYSE	NAT	Tue, Feb 26, 2002	12.98	13.18	12.95	13.18
1025	NYSE	NAT	Mon, Feb 25, 2002	13.15	13.15	12.89	12.96
1024	NYSE	NAT	Fri, Feb 22, 2002	13.14	13.33	13.10	13.15
1023	NYSE	NAT	Thu, Feb 21, 2002	12.94	13.12	12.93	13.12
1022	NYSE	NAT	Wed, Feb 20, 2002	13.08	13.13	12.94	12.94
1021	NYSE	NAT	Tue, Feb 19, 2002	13.23	13.23	12.94	13.05
1020	NYSE	NAT	Fri, Feb 15, 2002	13.08	13.13	12.98	13.08
1019	NYSE	NAT	Thu, Feb 14, 2002	13.18	13.38	12.94	13.03
1018	NYSE	NAT	Wed, Feb 13, 2002	12.84	13.18	12.84	13.18
1017	NYSE	NAT	Tue, Feb 12, 2002	13.13	13.13	12.84	12.90
1016	NYSE	NAT	Mon, Feb 11, 2002	13.68	13.72	13.09	13.13
1015	NYSE	NAT	Fri, Feb 8, 2002	13.40	13.68	13.40	13.63
1014	NYSE	NAT	Thu, Feb 7, 2002	13.88	13.88	13.42	13.45
1013	NYSE	NAT	Wed, Feb 6, 2002	13.49	13.93	13.49	13.88
1012	NYSE	NAT	Tue, Feb 5, 2002	13.60	13.63	13.48	13.52
1011	NYSE	NAT	Mon, Feb 4, 2002	13.88	13.88	13.63	13.64
1010	NYSE	NAT	Fri, Feb 1, 2002	13.98	14.08	13.78	13.79
1009	NYSE	NAT	Thu, Jan 31, 2002	14.08	14.08	13.78	13.96
1008	NYSE	NAT	Wed, Jan 30, 2002	14.37	14.42	14.17	14.28
1007	NYSE	NAT	Tue, Jan 29, 2002	14.32	14.52	14.27	14.42
1006	NYSE	NAT	Mon, Jan 28, 2002	14.25	14.37	14.03	14.33
1005	NYSE	NAT	Fri, Jan 25, 2002	14.37	14.47	14.27	14.32
1004	NYSE	NAT	Thu, Jan 24, 2002	14.22	14.42	14.17	14.37
1003	NYSE	NAT	Wed, Jan 23, 2002	14.32	14.32	13.73	14.22
1002	NYSE	NAT	Tue, Jan 22, 2002	14.57	14.87	14.57	14.58
1001	NYSE	NAT	Fri, Jan 18, 2002	14.37	14.57	14.27	14.52
1000	NYSE	NAT	Thu, Jan 17, 2002	14.17	14.47	13.99	14.32
999	NYSE	NAT	Wed, Jan 16, 2002	14.03	14.27	13.89	14.03
998	NYSE	NAT	Tue, Jan 15, 2002	14.27	14.27	13.89	13.93
997	NYSE	NAT	Mon, Jan 14, 2002	14.63	14.65	14.22	14.24
996	NYSE	NAT	Fri, Jan 11, 2002	14.45	14.77	14.37	14.63
995	NYSE	NAT	Thu, Jan 10, 2002	14.27	14.86	14.16	14.45
994	NYSE	NAT	Wed, Jan 9, 2002	14.27	14.27	14.15	14.22
993	NYSE	NAT	Tue, Jan 8, 2002	13.89	14.27	13.89	14.27
992	NYSE	NAT	Mon, Jan 7, 2002	14.06	14.08	13.88	13.93
991	NYSE	NAT	Fri, Jan 4, 2002	13.90	14.08	13.83	14.08
990	NYSE	NAT	Thu, Jan 3, 2002	14.10	14.11	13.90	13.93
989	NYSE	NAT	Wed, Jan 2, 2002	13.78	14.10	13.78	14.08
988	NYSE	NAT	Mon, Dec 31, 2001	13.69	14.09	13.68	13.73
987	NYSE	NAT	Fri, Dec 28, 2001	13.43	13.87	13.38	13.73
986	NYSE	NAT	Thu, Dec 27, 2001	13.23	13.38	13.09	13.38
985	NYSE	NAT	Wed, Dec 26, 2001	13.04	13.33	13.04	13.18
984	NYSE	NAT	Mon, Dec 24, 2001	13.13	13.35	12.91	13.09
983	NYSE	NAT	Fri, Dec 21, 2001	13.28	13.38	12.89	13.13
982	NYSE	NAT	Thu, Dec 20, 2001	13.58	13.59	13.18	13.28
981	NYSE	NAT	Wed, Dec 19, 2001	13.53	13.78	13.20	13.72
980	NYSE	NAT	Tue, Dec 18, 2001	13.58	13.68	13.23	13.53
979	NYSE	NAT	Mon, Dec 17, 2001	13.58	13.72	13.19	13.63
978	NYSE	NAT	Fri, Dec 14, 2001	13.63	13.78	13.49	13.72
977	NYSE	NAT	Thu, Dec 13, 2001	13.63	13.78	13.54	13.58
976	NYSE	NAT	Wed, Dec 12, 2001	13.58	13.63	13.38	13.62
975	NYSE	NAT	Tue, Dec 11, 2001	13.48	13.56	13.18	13.53
974	NYSE	NAT	Mon, Dec 10, 2001	13.48	13.69	13.14	13.43
973	NYSE	NAT	Fri, Dec 7, 2001	13.18	13.58	13.15	13.57
972	NYSE	NAT	Thu, Dec 6, 2001	13.78	13.78	13.14	13.26
971	NYSE	NAT	Wed, Dec 5, 2001	13.73	13.91	13.63	13.73
970	NYSE	NAT	Tue, Dec 4, 2001	13.88	13.88	13.68	13.75
969	NYSE	NAT	Mon, Dec 3, 2001	13.78	13.88	13.55	13.86
968	NYSE	NAT	Fri, Nov 30, 2001	13.87	13.88	13.54	13.68
967	NYSE	NAT	Thu, Nov 29, 2001	14.37	14.57	13.69	13.78
966	NYSE	NAT	Wed, Nov 28, 2001	14.62	14.78	14.27	14.42
965	NYSE	NAT	Tue, Nov 27, 2001	13.93	14.87	13.68	14.82
964	NYSE	NAT	Mon, Nov 26, 2001	13.38	13.72	13.36	13.58
963	NYSE	NAT	Fri, Nov 23, 2001	13.28	13.57	13.28	13.40
962	NYSE	NAT	Wed, Nov 21, 2001	13.13	13.31	13.13	13.31
961	NYSE	NAT	Tue, Nov 20, 2001	13.18	13.28	13.14	13.14
960	NYSE	NAT	Mon, Nov 19, 2001	13.43	13.43	12.98	13.17
959	NYSE	NAT	Fri, Nov 16, 2001	13.08	13.57	13.08	13.23
958	NYSE	NAT	Thu, Nov 15, 2001	14.08	14.08	13.39	13.58
957	NYSE	NAT	Wed, Nov 14, 2001	14.05	14.17	13.92	14.11
956	NYSE	NAT	Tue, Nov 13, 2001	14.12	14.16	13.90	14.03
955	NYSE	NAT	Mon, Nov 12, 2001	14.12	14.26	13.89	14.12
954	NYSE	NAT	Fri, Nov 9, 2001	14.12	14.36	13.94	14.11
953	NYSE	NAT	Thu, Nov 8, 2001	14.22	14.31	13.98	14.06
952	NYSE	NAT	Wed, Nov 7, 2001	13.17	14.37	12.95	14.28
951	NYSE	NAT	Tue, Nov 6, 2001	12.90	13.17	12.90	13.17
950	NYSE	NAT	Mon, Nov 5, 2001	13.13	13.20	12.89	12.91
949	NYSE	NAT	Fri, Nov 2, 2001	13.14	13.43	13.14	13.33
948	NYSE	NAT	Thu, Nov 1, 2001	13.38	13.38	13.13	13.16
947	NYSE	NAT	Wed, Oct 31, 2001	13.88	13.98	13.83	13.83
946	NYSE	NAT	Tue, Oct 30, 2001	14.22	14.22	13.91	13.93
945	NYSE	NAT	Mon, Oct 29, 2001	14.03	14.27	14.02	14.16
944	NYSE	NAT	Fri, Oct 26, 2001	13.98	14.02	13.88	14.02
943	NYSE	NAT	Thu, Oct 25, 2001	14.03	14.12	13.93	13.97
942	NYSE	NAT	Wed, Oct 24, 2001	14.37	14.77	13.88	14.16
941	NYSE	NAT	Tue, Oct 23, 2001	14.92	15.12	14.82	14.87
940	NYSE	NAT	Mon, Oct 22, 2001	15.35	15.35	14.84	14.96
939	NYSE	NAT	Fri, Oct 19, 2001	15.66	15.76	14.86	15.35
938	NYSE	NAT	Thu, Oct 18, 2001	16.11	16.16	15.36	15.51
937	NYSE	NAT	Wed, Oct 17, 2001	15.90	16.11	15.90	16.09
936	NYSE	NAT	Tue, Oct 16, 2001	16.50	16.50	15.56	15.85
935	NYSE	NAT	Mon, Oct 15, 2001	16.01	16.40	16.01	16.35
934	NYSE	NAT	Fri, Oct 12, 2001	16.35	16.45	15.86	16.01
933	NYSE	NAT	Thu, Oct 11, 2001	16.26	16.55	16.26	16.35
932	NYSE	NAT	Wed, Oct 10, 2001	16.34	16.35	16.17	16.29
931	NYSE	NAT	Tue, Oct 9, 2001	16.45	16.45	16.16	16.26
930	NYSE	NAT	Mon, Oct 8, 2001	16.50	16.69	16.21	16.35
929	NYSE	NAT	Fri, Oct 5, 2001	16.75	16.75	16.16	16.40
928	NYSE	NAT	Thu, Oct 4, 2001	16.65	16.75	16.65	16.75
927	NYSE	NAT	Wed, Oct 3, 2001	16.35	16.95	16.12	16.65
926	NYSE	NAT	Tue, Oct 2, 2001	15.96	16.45	15.86	16.22
925	NYSE	NAT	Mon, Oct 1, 2001	14.92	16.06	14.82	15.95
924	NYSE	NAT	Fri, Sep 28, 2001	14.87	14.97	14.72	14.86
923	NYSE	NAT	Thu, Sep 27, 2001	15.02	15.07	14.28	14.67
922	NYSE	NAT	Wed, Sep 26, 2001	14.87	15.22	14.87	14.96
921	NYSE	NAT	Tue, Sep 25, 2001	15.07	15.07	14.47	14.87
920	NYSE	NAT	Mon, Sep 24, 2001	14.72	15.41	14.63	15.07
919	NYSE	NAT	Fri, Sep 21, 2001	15.07	15.07	13.63	14.82
918	NYSE	NAT	Thu, Sep 20, 2001	16.31	16.39	14.89	15.17
917	NYSE	NAT	Wed, Sep 19, 2001	17.35	17.95	15.61	16.21
916	NYSE	NAT	Tue, Sep 18, 2001	16.65	17.35	16.45	17.20
915	NYSE	NAT	Mon, Sep 17, 2001	16.26	16.90	15.86	16.75
914	NYSE	NAT	Mon, Sep 10, 2001	16.70	16.70	15.86	16.50
913	NYSE	NAT	Fri, Sep 7, 2001	17.45	17.45	16.65	16.75
912	NYSE	NAT	Thu, Sep 6, 2001	17.49	17.64	17.45	17.46
911	NYSE	NAT	Wed, Sep 5, 2001	17.59	17.74	17.45	17.71
910	NYSE	NAT	Tue, Sep 4, 2001	17.74	17.74	17.46	17.60
909	NYSE	NAT	Fri, Aug 31, 2001	17.54	17.84	17.45	17.59
908	NYSE	NAT	Thu, Aug 30, 2001	17.54	17.63	17.49	17.49
907	NYSE	NAT	Wed, Aug 29, 2001	17.25	17.59	17.25	17.49
906	NYSE	NAT	Tue, Aug 28, 2001	17.53	17.53	17.15	17.45
905	NYSE	NAT	Mon, Aug 27, 2001	17.69	17.69	17.25	17.46
904	NYSE	NAT	Fri, Aug 24, 2001	17.74	17.96	17.64	17.67
903	NYSE	NAT	Thu, Aug 23, 2001	17.94	17.94	17.60	17.68
902	NYSE	NAT	Wed, Aug 22, 2001	17.79	17.93	17.59	17.84
901	NYSE	NAT	Tue, Aug 21, 2001	17.53	17.79	17.27	17.79
900	NYSE	NAT	Mon, Aug 20, 2001	17.36	17.45	17.30	17.34
899	NYSE	NAT	Fri, Aug 17, 2001	17.62	17.62	17.05	17.36
898	NYSE	NAT	Thu, Aug 16, 2001	17.28	17.59	17.28	17.46
897	NYSE	NAT	Wed, Aug 15, 2001	17.10	17.30	17.10	17.28
896	NYSE	NAT	Tue, Aug 14, 2001	17.15	17.54	17.01	17.05
895	NYSE	NAT	Mon, Aug 13, 2001	17.26	17.48	17.15	17.34
894	NYSE	NAT	Fri, Aug 10, 2001	17.10	17.35	17.10	17.26
893	NYSE	NAT	Thu, Aug 9, 2001	16.85	17.10	16.85	17.06
892	NYSE	NAT	Wed, Aug 8, 2001	16.85	17.10	16.85	16.91
891	NYSE	NAT	Tue, Aug 7, 2001	16.75	17.15	16.61	16.75
890	NYSE	NAT	Mon, Aug 6, 2001	17.30	17.69	16.75	16.84
889	NYSE	NAT	Fri, Aug 3, 2001	17.15	17.45	16.95	17.30
888	NYSE	NAT	Thu, Aug 2, 2001	17.00	17.25	16.60	17.02
887	NYSE	NAT	Wed, Aug 1, 2001	16.45	17.30	16.35	17.00
886	NYSE	NAT	Tue, Jul 31, 2001	16.80	17.04	16.45	16.50
885	NYSE	NAT	Mon, Jul 30, 2001	17.58	17.58	16.66	16.95
884	NYSE	NAT	Fri, Jul 27, 2001	17.74	17.74	17.15	17.59
883	NYSE	NAT	Thu, Jul 26, 2001	17.35	17.68	17.33	17.54
882	NYSE	NAT	Wed, Jul 25, 2001	17.28	17.60	16.45	17.33
881	NYSE	NAT	Tue, Jul 24, 2001	18.83	18.83	17.64	17.96
880	NYSE	NAT	Mon, Jul 23, 2001	19.03	19.35	18.93	19.01
879	NYSE	NAT	Fri, Jul 20, 2001	19.03	19.08	18.84	18.93
878	NYSE	NAT	Thu, Jul 19, 2001	18.63	19.18	18.63	18.98
877	NYSE	NAT	Wed, Jul 18, 2001	19.08	19.23	18.54	18.63
876	NYSE	NAT	Tue, Jul 17, 2001	18.69	19.04	18.69	18.84
875	NYSE	NAT	Mon, Jul 16, 2001	18.73	18.81	18.54	18.69
874	NYSE	NAT	Fri, Jul 13, 2001	18.73	18.83	18.58	18.73
873	NYSE	NAT	Thu, Jul 12, 2001	18.44	18.75	18.44	18.72
872	NYSE	NAT	Wed, Jul 11, 2001	17.96	18.54	17.94	18.34
871	NYSE	NAT	Tue, Jul 10, 2001	18.93	19.03	17.94	18.02
870	NYSE	NAT	Mon, Jul 9, 2001	18.83	19.08	18.73	18.83
869	NYSE	NAT	Fri, Jul 6, 2001	19.03	19.08	18.34	18.83
868	NYSE	NAT	Thu, Jul 5, 2001	18.19	18.81	18.04	18.78
867	NYSE	NAT	Tue, Jul 3, 2001	17.45	18.23	17.35	18.19
866	NYSE	NAT	Mon, Jul 2, 2001	17.03	17.54	17.00	17.35
865	NYSE	NAT	Fri, Jun 29, 2001	15.86	17.03	15.86	17.03
864	NYSE	NAT	Thu, Jun 28, 2001	17.74	17.79	16.16	16.95
863	NYSE	NAT	Wed, Jun 27, 2001	18.14	18.29	17.59	17.74
862	NYSE	NAT	Tue, Jun 26, 2001	18.09	18.82	17.99	18.09
861	NYSE	NAT	Mon, Jun 25, 2001	17.10	18.19	17.10	18.09
860	NYSE	NAT	Fri, Jun 22, 2001	17.85	17.85	17.10	17.10
859	NYSE	NAT	Thu, Jun 21, 2001	18.49	18.64	18.04	18.09
858	NYSE	NAT	Wed, Jun 20, 2001	18.49	18.73	18.49	18.49
857	NYSE	NAT	Tue, Jun 19, 2001	18.78	18.98	18.39	18.63
856	NYSE	NAT	Mon, Jun 18, 2001	18.83	18.98	18.24	18.59
855	NYSE	NAT	Fri, Jun 15, 2001	19.28	19.60	18.96	19.01
854	NYSE	NAT	Thu, Jun 14, 2001	19.23	19.33	19.08	19.18
853	NYSE	NAT	Wed, Jun 13, 2001	18.78	19.43	18.78	19.02
852	NYSE	NAT	Tue, Jun 12, 2001	19.58	19.67	17.84	18.78
851	NYSE	NAT	Mon, Jun 11, 2001	20.52	20.72	19.48	19.70
850	NYSE	NAT	Fri, Jun 8, 2001	21.31	21.31	20.57	20.72
849	NYSE	NAT	Thu, Jun 7, 2001	21.34	21.42	21.00	21.31
848	NYSE	NAT	Wed, Jun 6, 2001	21.74	21.74	20.83	21.43
847	NYSE	NAT	Tue, Jun 5, 2001	20.91	21.81	20.78	21.51
846	NYSE	NAT	Mon, Jun 4, 2001	20.82	20.91	20.42	20.86
845	NYSE	NAT	Fri, Jun 1, 2001	20.33	20.82	20.33	20.81
844	NYSE	NAT	Thu, May 31, 2001	20.82	21.06	20.42	20.42
843	NYSE	NAT	Wed, May 30, 2001	21.06	21.06	20.52	20.68
842	NYSE	NAT	Tue, May 29, 2001	20.47	21.26	20.47	21.06
841	NYSE	NAT	Fri, May 25, 2001	20.53	20.67	20.44	20.47
840	NYSE	NAT	Thu, May 24, 2001	20.42	20.82	20.33	20.52
839	NYSE	NAT	Wed, May 23, 2001	20.57	20.60	20.33	20.43
838	NYSE	NAT	Tue, May 22, 2001	20.52	20.77	20.32	20.52
837	NYSE	NAT	Mon, May 21, 2001	20.47	20.81	20.22	20.42
836	NYSE	NAT	Fri, May 18, 2001	21.06	21.06	20.33	20.49
835	NYSE	NAT	Thu, May 17, 2001	21.41	21.46	20.82	21.16
834	NYSE	NAT	Wed, May 16, 2001	20.67	21.56	20.67	21.41
833	NYSE	NAT	Tue, May 15, 2001	20.57	20.61	20.46	20.56
832	NYSE	NAT	Mon, May 14, 2001	20.67	21.01	20.42	20.62
831	NYSE	NAT	Fri, May 11, 2001	21.06	21.26	20.57	20.62
830	NYSE	NAT	Thu, May 10, 2001	21.11	21.31	20.92	21.09
829	NYSE	NAT	Wed, May 9, 2001	20.62	21.11	20.32	21.01
828	NYSE	NAT	Tue, May 8, 2001	19.82	20.72	19.77	20.45
827	NYSE	NAT	Mon, May 7, 2001	19.68	19.92	19.48	19.91
826	NYSE	NAT	Fri, May 4, 2001	19.63	19.91	19.46	19.91
825	NYSE	NAT	Thu, May 3, 2001	19.38	19.66	19.38	19.63
824	NYSE	NAT	Wed, May 2, 2001	20.21	20.21	19.64	19.68
823	NYSE	NAT	Tue, May 1, 2001	20.32	20.46	19.92	20.22
822	NYSE	NAT	Mon, Apr 30, 2001	20.46	20.47	20.32	20.47
821	NYSE	NAT	Fri, Apr 27, 2001	20.62	20.77	20.09	20.47
820	NYSE	NAT	Thu, Apr 26, 2001	20.97	21.29	20.44	21.11
819	NYSE	NAT	Wed, Apr 25, 2001	19.92	21.06	19.72	20.97
818	NYSE	NAT	Tue, Apr 24, 2001	20.81	21.61	19.92	19.92
817	NYSE	NAT	Mon, Apr 23, 2001	21.07	21.76	21.07	21.74
816	NYSE	NAT	Fri, Apr 20, 2001	21.32	21.41	20.12	21.06
815	NYSE	NAT	Thu, Apr 19, 2001	22.20	22.29	21.31	21.32
814	NYSE	NAT	Wed, Apr 18, 2001	22.55	22.55	22.10	22.10
813	NYSE	NAT	Tue, Apr 17, 2001	22.25	22.45	22.10	22.15
812	NYSE	NAT	Mon, Apr 16, 2001	22.50	22.55	22.20	22.20
811	NYSE	NAT	Thu, Apr 12, 2001	22.55	22.59	22.05	22.40
810	NYSE	NAT	Wed, Apr 11, 2001	22.31	22.69	22.20	22.55
809	NYSE	NAT	Tue, Apr 10, 2001	21.91	22.55	21.56	22.31
808	NYSE	NAT	Mon, Apr 9, 2001	20.86	21.61	20.86	21.52
807	NYSE	NAT	Fri, Apr 6, 2001	20.77	20.77	20.32	20.71
806	NYSE	NAT	Thu, Apr 5, 2001	20.07	20.72	20.02	20.65
805	NYSE	NAT	Wed, Apr 4, 2001	20.02	20.10	19.88	20.03
804	NYSE	NAT	Tue, Apr 3, 2001	20.37	20.43	19.87	19.93
803	NYSE	NAT	Mon, Apr 2, 2001	19.82	20.17	19.82	20.17
802	NYSE	NAT	Fri, Mar 30, 2001	20.02	20.20	19.63	19.72
801	NYSE	NAT	Thu, Mar 29, 2001	19.53	19.82	19.53	19.82
800	NYSE	NAT	Wed, Mar 28, 2001	19.18	19.62	19.18	19.53
799	NYSE	NAT	Tue, Mar 27, 2001	19.18	19.22	18.84	19.22
798	NYSE	NAT	Mon, Mar 26, 2001	19.18	19.22	18.88	19.03
797	NYSE	NAT	Fri, Mar 23, 2001	18.59	18.68	18.35	18.68
796	NYSE	NAT	Thu, Mar 22, 2001	19.33	19.37	18.34	18.59
795	NYSE	NAT	Wed, Mar 21, 2001	19.63	19.63	19.28	19.37
794	NYSE	NAT	Tue, Mar 20, 2001	19.28	19.82	19.25	19.63
793	NYSE	NAT	Mon, Mar 19, 2001	19.13	19.58	18.83	19.08
792	NYSE	NAT	Fri, Mar 16, 2001	19.33	19.62	18.93	19.03
791	NYSE	NAT	Thu, Mar 15, 2001	19.28	19.33	19.18	19.27
790	NYSE	NAT	Wed, Mar 14, 2001	19.82	19.82	19.28	19.43
789	NYSE	NAT	Tue, Mar 13, 2001	20.12	20.16	19.60	19.92
788	NYSE	NAT	Mon, Mar 12, 2001	21.06	21.22	19.33	19.85
787	NYSE	NAT	Fri, Mar 9, 2001	20.42	21.06	20.37	21.02
786	NYSE	NAT	Thu, Mar 8, 2001	19.92	20.44	19.86	20.42
785	NYSE	NAT	Wed, Mar 7, 2001	19.43	19.87	19.37	19.78
784	NYSE	NAT	Tue, Mar 6, 2001	19.33	19.54	19.31	19.38
783	NYSE	NAT	Mon, Mar 5, 2001	18.77	19.33	18.77	19.25
782	NYSE	NAT	Fri, Mar 2, 2001	18.83	18.96	18.68	18.77
781	NYSE	NAT	Thu, Mar 1, 2001	18.44	18.93	18.44	18.68
780	NYSE	NAT	Wed, Feb 28, 2001	18.59	18.65	18.34	18.44
779	NYSE	NAT	Tue, Feb 27, 2001	18.34	18.54	18.28	18.49
778	NYSE	NAT	Mon, Feb 26, 2001	18.24	18.44	18.09	18.24
777	NYSE	NAT	Fri, Feb 23, 2001	18.04	18.39	18.04	18.14
776	NYSE	NAT	Thu, Feb 22, 2001	18.14	18.24	17.96	17.99
775	NYSE	NAT	Wed, Feb 21, 2001	18.14	18.24	17.84	18.04
774	NYSE	NAT	Tue, Feb 20, 2001	18.14	18.49	18.09	18.09
773	NYSE	NAT	Fri, Feb 16, 2001	17.84	18.44	17.84	18.10
772	NYSE	NAT	Thu, Feb 15, 2001	17.84	17.94	17.69	17.74
771	NYSE	NAT	Wed, Feb 14, 2001	17.99	17.99	17.74	17.84
770	NYSE	NAT	Tue, Feb 13, 2001	17.99	18.14	17.90	17.99
769	NYSE	NAT	Mon, Feb 12, 2001	17.84	18.09	17.74	18.09
768	NYSE	NAT	Fri, Feb 9, 2001	17.79	18.20	17.79	17.94
767	NYSE	NAT	Thu, Feb 8, 2001	17.79	17.84	17.75	17.79
766	NYSE	NAT	Wed, Feb 7, 2001	18.24	18.28	17.84	17.84
765	NYSE	NAT	Tue, Feb 6, 2001	17.89	18.28	17.89	18.14
764	NYSE	NAT	Mon, Feb 5, 2001	17.66	17.91	17.59	17.79
763	NYSE	NAT	Fri, Feb 2, 2001	17.56	18.28	17.35	17.85
762	NYSE	NAT	Thu, Feb 1, 2001	17.91	17.94	16.75	17.35
761	NYSE	NAT	Wed, Jan 31, 2001	17.69	17.90	17.52	17.84
760	NYSE	NAT	Tue, Jan 30, 2001	18.59	18.68	17.10	17.45
759	NYSE	NAT	Mon, Jan 29, 2001	18.34	18.82	18.28	18.59
758	NYSE	NAT	Fri, Jan 26, 2001	17.84	18.59	17.72	18.28
757	NYSE	NAT	Thu, Jan 25, 2001	18.59	18.59	17.35	17.53
756	NYSE	NAT	Wed, Jan 24, 2001	19.64	19.76	18.52	18.59
755	NYSE	NAT	Tue, Jan 23, 2001	21.12	21.19	20.75	21.06
754	NYSE	NAT	Mon, Jan 22, 2001	21.31	21.56	21.00	21.06
753	NYSE	NAT	Fri, Jan 19, 2001	20.69	21.43	20.63	21.31
752	NYSE	NAT	Thu, Jan 18, 2001	21.81	21.81	20.69	20.82
751	NYSE	NAT	Wed, Jan 17, 2001	21.93	22.05	21.50	21.62
750	NYSE	NAT	Tue, Jan 16, 2001	21.81	22.05	21.56	21.74
749	NYSE	NAT	Fri, Jan 12, 2001	21.81	21.87	21.56	21.68
748	NYSE	NAT	Thu, Jan 11, 2001	21.56	22.05	21.50	21.81
747	NYSE	NAT	Wed, Jan 10, 2001	21.31	21.56	21.25	21.56
746	NYSE	NAT	Tue, Jan 9, 2001	21.31	22.05	20.82	21.31
745	NYSE	NAT	Mon, Jan 8, 2001	20.32	21.74	20.32	21.56
744	NYSE	NAT	Fri, Jan 5, 2001	20.07	20.26	19.95	20.20
743	NYSE	NAT	Thu, Jan 4, 2001	20.07	20.20	19.82	19.95
742	NYSE	NAT	Wed, Jan 3, 2001	20.20	20.26	19.70	20.07
741	NYSE	NAT	Tue, Jan 2, 2001	19.82	20.07	19.70	20.07
740	NYSE	NAT	Fri, Dec 29, 2000	19.58	19.82	19.58	19.82
739	NYSE	NAT	Thu, Dec 28, 2000	19.70	19.95	19.58	19.76
738	NYSE	NAT	Wed, Dec 27, 2000	19.70	19.82	19.33	19.82
737	NYSE	NAT	Tue, Dec 26, 2000	19.39	19.45	19.20	19.39
736	NYSE	NAT	Fri, Dec 22, 2000	19.45	19.51	19.20	19.27
735	NYSE	NAT	Thu, Dec 21, 2000	19.33	19.33	19.08	19.20
734	NYSE	NAT	Wed, Dec 20, 2000	18.83	19.70	18.83	19.39
733	NYSE	NAT	Tue, Dec 19, 2000	18.59	18.96	18.40	18.89
732	NYSE	NAT	Mon, Dec 18, 2000	18.46	18.71	18.34	18.59
731	NYSE	NAT	Fri, Dec 15, 2000	18.46	18.59	18.28	18.46
730	NYSE	NAT	Thu, Dec 14, 2000	19.08	19.08	18.46	18.46
729	NYSE	NAT	Wed, Dec 13, 2000	18.96	18.96	18.83	18.83
728	NYSE	NAT	Tue, Dec 12, 2000	18.46	19.20	18.21	18.96
727	NYSE	NAT	Mon, Dec 11, 2000	18.34	18.59	18.21	18.46
726	NYSE	NAT	Fri, Dec 8, 2000	18.34	18.34	18.09	18.34
725	NYSE	NAT	Thu, Dec 7, 2000	18.83	18.83	18.03	18.09
724	NYSE	NAT	Wed, Dec 6, 2000	18.96	19.14	18.83	19.02
723	NYSE	NAT	Tue, Dec 5, 2000	18.83	19.20	18.83	19.08
722	NYSE	NAT	Mon, Dec 4, 2000	17.84	18.59	17.84	18.59
721	NYSE	NAT	Fri, Dec 1, 2000	17.97	17.97	17.41	17.78
720	NYSE	NAT	Thu, Nov 30, 2000	18.15	18.34	16.60	17.72
719	NYSE	NAT	Wed, Nov 29, 2000	18.34	18.34	17.41	18.28
718	NYSE	NAT	Tue, Nov 28, 2000	18.59	18.71	18.15	18.34
717	NYSE	NAT	Mon, Nov 27, 2000	19.20	19.58	18.77	18.96
716	NYSE	NAT	Fri, Nov 24, 2000	18.83	19.14	18.83	18.96
715	NYSE	NAT	Wed, Nov 22, 2000	19.82	19.82	18.71	18.71
714	NYSE	NAT	Tue, Nov 21, 2000	19.76	19.82	19.58	19.82
713	NYSE	NAT	Mon, Nov 20, 2000	20.20	20.20	19.58	19.70
712	NYSE	NAT	Fri, Nov 17, 2000	19.82	20.57	19.82	20.13
711	NYSE	NAT	Thu, Nov 16, 2000	19.82	19.95	19.58	19.82
710	NYSE	NAT	Wed, Nov 15, 2000	19.08	19.82	18.83	19.70
709	NYSE	NAT	Tue, Nov 14, 2000	18.89	18.96	18.71	18.96
708	NYSE	NAT	Mon, Nov 13, 2000	19.33	19.33	18.96	18.96
707	NYSE	NAT	Fri, Nov 10, 2000	19.27	19.82	18.96	19.58
706	NYSE	NAT	Thu, Nov 9, 2000	19.82	19.82	19.14	19.27
705	NYSE	NAT	Wed, Nov 8, 2000	19.58	19.70	19.51	19.70
704	NYSE	NAT	Tue, Nov 7, 2000	19.58	19.70	19.45	19.58
703	NYSE	NAT	Mon, Nov 6, 2000	18.71	19.33	18.71	19.33
702	NYSE	NAT	Fri, Nov 3, 2000	19.33	19.33	17.97	18.46
701	NYSE	NAT	Thu, Nov 2, 2000	19.89	20.32	19.08	19.08
700	NYSE	NAT	Wed, Nov 1, 2000	21.19	21.19	19.08	19.76
699	NYSE	NAT	Tue, Oct 31, 2000	21.43	21.50	20.94	21.19
698	NYSE	NAT	Mon, Oct 30, 2000	21.06	21.56	20.82	21.31
697	NYSE	NAT	Fri, Oct 27, 2000	21.43	21.50	20.88	21.19
696	NYSE	NAT	Thu, Oct 26, 2000	21.68	21.74	21.31	21.50
695	NYSE	NAT	Wed, Oct 25, 2000	21.81	21.81	21.31	21.68
694	NYSE	NAT	Tue, Oct 24, 2000	22.74	22.74	22.30	22.67
693	NYSE	NAT	Mon, Oct 23, 2000	22.74	22.74	22.61	22.67
692	NYSE	NAT	Fri, Oct 20, 2000	22.55	22.74	22.43	22.67
691	NYSE	NAT	Thu, Oct 19, 2000	22.43	22.74	22.05	22.43
690	NYSE	NAT	Wed, Oct 18, 2000	22.43	22.67	22.18	22.43
689	NYSE	NAT	Tue, Oct 17, 2000	22.49	22.55	22.05	22.43
688	NYSE	NAT	Mon, Oct 16, 2000	22.55	22.67	22.18	22.49
687	NYSE	NAT	Fri, Oct 13, 2000	22.67	22.86	22.43	22.55
686	NYSE	NAT	Thu, Oct 12, 2000	22.80	23.05	22.55	22.55
685	NYSE	NAT	Wed, Oct 11, 2000	23.17	23.23	22.55	22.86
684	NYSE	NAT	Tue, Oct 10, 2000	22.86	23.17	22.43	23.05
683	NYSE	NAT	Mon, Oct 9, 2000	20.88	22.98	20.88	22.98
682	NYSE	NAT	Fri, Oct 6, 2000	21.81	21.81	20.88	21.00
681	NYSE	NAT	Thu, Oct 5, 2000	22.92	23.05	21.43	21.93
680	NYSE	NAT	Wed, Oct 4, 2000	22.43	23.05	22.43	22.80
679	NYSE	NAT	Tue, Oct 3, 2000	22.24	22.43	22.24	22.30
678	NYSE	NAT	Mon, Oct 2, 2000	21.43	22.30	21.31	22.24
677	NYSE	NAT	Fri, Sep 29, 2000	20.57	21.43	20.57	21.43
676	NYSE	NAT	Thu, Sep 28, 2000	19.82	20.63	19.82	20.57
675	NYSE	NAT	Wed, Sep 27, 2000	20.01	20.32	19.58	19.76
674	NYSE	NAT	Tue, Sep 26, 2000	20.82	20.82	20.13	20.20
673	NYSE	NAT	Mon, Sep 25, 2000	22.49	22.55	20.69	21.06
672	NYSE	NAT	Fri, Sep 22, 2000	22.24	22.55	22.05	22.43
671	NYSE	NAT	Thu, Sep 21, 2000	22.43	22.55	22.30	22.36
670	NYSE	NAT	Wed, Sep 20, 2000	22.18	22.43	22.18	22.43
669	NYSE	NAT	Tue, Sep 19, 2000	22.30	22.55	22.05	22.05
668	NYSE	NAT	Mon, Sep 18, 2000	22.49	22.55	22.30	22.36
667	NYSE	NAT	Fri, Sep 15, 2000	22.55	22.67	22.18	22.43
666	NYSE	NAT	Thu, Sep 14, 2000	22.18	22.92	21.68	22.30
665	NYSE	NAT	Wed, Sep 13, 2000	20.57	22.43	20.57	22.30
664	NYSE	NAT	Tue, Sep 12, 2000	20.20	20.69	20.20	20.69
663	NYSE	NAT	Mon, Sep 11, 2000	20.69	21.31	20.20	20.32
662	NYSE	NAT	Fri, Sep 8, 2000	20.20	20.82	20.13	20.57
661	NYSE	NAT	Thu, Sep 7, 2000	20.07	20.20	19.82	20.13
660	NYSE	NAT	Wed, Sep 6, 2000	19.64	20.32	19.64	20.07
659	NYSE	NAT	Tue, Sep 5, 2000	18.71	19.58	18.59	19.58
658	NYSE	NAT	Fri, Sep 1, 2000	18.96	19.45	18.59	18.59
657	NYSE	NAT	Thu, Aug 31, 2000	18.83	19.27	18.83	18.96
656	NYSE	NAT	Wed, Aug 30, 2000	18.83	19.02	18.59	18.59
655	NYSE	NAT	Tue, Aug 29, 2000	18.59	18.83	18.59	18.77
654	NYSE	NAT	Mon, Aug 28, 2000	18.65	18.65	18.59	18.59
653	NYSE	NAT	Fri, Aug 25, 2000	18.59	18.65	18.59	18.65
652	NYSE	NAT	Thu, Aug 24, 2000	18.59	18.59	18.34	18.59
651	NYSE	NAT	Wed, Aug 23, 2000	18.21	18.71	18.21	18.59
650	NYSE	NAT	Tue, Aug 22, 2000	18.21	18.21	18.09	18.21
649	NYSE	NAT	Mon, Aug 21, 2000	18.21	18.21	17.84	18.15
648	NYSE	NAT	Fri, Aug 18, 2000	18.28	18.28	17.97	18.21
647	NYSE	NAT	Thu, Aug 17, 2000	18.09	18.21	18.09	18.21
646	NYSE	NAT	Wed, Aug 16, 2000	18.28	18.34	17.90	17.97
645	NYSE	NAT	Tue, Aug 15, 2000	18.21	18.21	18.15	18.21
644	NYSE	NAT	Mon, Aug 14, 2000	18.09	18.34	18.09	18.21
643	NYSE	NAT	Fri, Aug 11, 2000	18.09	18.46	17.84	18.09
642	NYSE	NAT	Thu, Aug 10, 2000	17.35	18.09	17.10	17.84
641	NYSE	NAT	Wed, Aug 9, 2000	17.22	17.35	17.22	17.35
640	NYSE	NAT	Tue, Aug 8, 2000	17.10	17.35	17.10	17.28
639	NYSE	NAT	Mon, Aug 7, 2000	17.22	17.35	17.16	17.22
638	NYSE	NAT	Fri, Aug 4, 2000	17.10	17.22	17.10	17.22
637	NYSE	NAT	Thu, Aug 3, 2000	16.85	17.10	16.85	17.10
636	NYSE	NAT	Wed, Aug 2, 2000	16.97	16.97	16.66	16.97
635	NYSE	NAT	Tue, Aug 1, 2000	16.85	17.35	16.85	16.85
634	NYSE	NAT	Mon, Jul 31, 2000	16.66	16.73	16.60	16.73
633	NYSE	NAT	Fri, Jul 28, 2000	16.48	16.73	16.48	16.60
632	NYSE	NAT	Thu, Jul 27, 2000	16.60	16.60	16.42	16.42
631	NYSE	NAT	Wed, Jul 26, 2000	16.91	16.91	16.54	16.54
630	NYSE	NAT	Tue, Jul 25, 2000	16.85	16.91	16.73	16.91
629	NYSE	NAT	Mon, Jul 24, 2000	17.35	17.47	17.28	17.35
628	NYSE	NAT	Fri, Jul 21, 2000	17.28	17.28	17.16	17.22
627	NYSE	NAT	Thu, Jul 20, 2000	17.59	17.59	17.10	17.28
626	NYSE	NAT	Wed, Jul 19, 2000	17.72	17.72	17.47	17.59
625	NYSE	NAT	Tue, Jul 18, 2000	17.72	17.84	17.66	17.84
624	NYSE	NAT	Mon, Jul 17, 2000	17.41	17.72	17.10	17.59
623	NYSE	NAT	Fri, Jul 14, 2000	16.85	17.04	16.79	16.97
622	NYSE	NAT	Thu, Jul 13, 2000	16.97	16.97	16.60	16.73
621	NYSE	NAT	Wed, Jul 12, 2000	16.97	16.97	16.79	16.97
620	NYSE	NAT	Tue, Jul 11, 2000	16.73	16.73	16.60	16.66
619	NYSE	NAT	Mon, Jul 10, 2000	16.97	17.10	16.35	16.73
618	NYSE	NAT	Fri, Jul 7, 2000	16.85	16.97	16.60	16.73
617	NYSE	NAT	Thu, Jul 6, 2000	16.85	16.97	16.85	16.85
616	NYSE	NAT	Wed, Jul 5, 2000	16.60	16.79	16.48	16.79
615	NYSE	NAT	Mon, Jul 3, 2000	16.23	16.60	16.23	16.60
614	NYSE	NAT	Fri, Jun 30, 2000	16.05	16.60	16.05	16.60
613	NYSE	NAT	Thu, Jun 29, 2000	16.79	16.85	15.61	15.86
612	NYSE	NAT	Wed, Jun 28, 2000	16.73	16.85	16.60	16.79
611	NYSE	NAT	Tue, Jun 27, 2000	16.85	16.85	16.66	16.85
610	NYSE	NAT	Mon, Jun 26, 2000	16.85	16.97	16.85	16.85
609	NYSE	NAT	Fri, Jun 23, 2000	16.85	16.85	16.60	16.60
608	NYSE	NAT	Thu, Jun 22, 2000	16.97	16.97	16.85	16.85
607	NYSE	NAT	Wed, Jun 21, 2000	16.73	16.85	16.60	16.85
606	NYSE	NAT	Tue, Jun 20, 2000	16.60	16.85	16.48	16.60
605	NYSE	NAT	Mon, Jun 19, 2000	16.85	16.85	16.23	16.35
604	NYSE	NAT	Fri, Jun 16, 2000	16.85	16.85	16.66	16.85
603	NYSE	NAT	Thu, Jun 15, 2000	16.79	16.85	16.60	16.85
602	NYSE	NAT	Wed, Jun 14, 2000	16.85	16.97	16.66	16.73
601	NYSE	NAT	Tue, Jun 13, 2000	16.60	16.85	16.42	16.85
600	NYSE	NAT	Mon, Jun 12, 2000	16.48	16.79	16.48	16.73
599	NYSE	NAT	Fri, Jun 9, 2000	16.29	16.35	15.98	16.29
598	NYSE	NAT	Thu, Jun 8, 2000	16.29	16.29	16.11	16.11
597	NYSE	NAT	Wed, Jun 7, 2000	15.98	16.35	15.67	16.23
596	NYSE	NAT	Tue, Jun 6, 2000	15.49	16.23	15.36	15.86
595	NYSE	NAT	Mon, Jun 5, 2000	14.87	15.49	14.62	15.24
594	NYSE	NAT	Fri, Jun 2, 2000	14.06	15.12	14.06	14.81
593	NYSE	NAT	Thu, Jun 1, 2000	13.75	14.25	13.75	14.06
592	NYSE	NAT	Wed, May 31, 2000	13.51	13.88	13.51	13.75
591	NYSE	NAT	Tue, May 30, 2000	13.63	13.63	13.44	13.51
590	NYSE	NAT	Fri, May 26, 2000	13.51	13.75	13.51	13.63
589	NYSE	NAT	Thu, May 25, 2000	13.51	13.63	13.38	13.63
588	NYSE	NAT	Wed, May 24, 2000	13.51	13.63	13.38	13.51
587	NYSE	NAT	Tue, May 23, 2000	13.44	13.44	13.44	13.44
586	NYSE	NAT	Mon, May 22, 2000	13.26	13.63	13.26	13.51
585	NYSE	NAT	Fri, May 19, 2000	13.26	13.26	13.26	13.26
584	NYSE	NAT	Thu, May 18, 2000	13.26	13.38	13.13	13.13
583	NYSE	NAT	Wed, May 17, 2000	13.38	13.57	13.13	13.38
582	NYSE	NAT	Tue, May 16, 2000	13.63	13.63	13.38	13.38
581	NYSE	NAT	Mon, May 15, 2000	13.38	13.63	13.20	13.51
580	NYSE	NAT	Fri, May 12, 2000	13.63	13.63	13.26	13.26
579	NYSE	NAT	Wed, May 10, 2000	13.63	13.63	13.38	13.57
578	NYSE	NAT	Tue, May 9, 2000	13.75	13.75	13.63	13.75
577	NYSE	NAT	Fri, May 5, 2000	13.94	13.94	13.63	13.63
576	NYSE	NAT	Thu, May 4, 2000	14.19	14.31	14.06	14.06
575	NYSE	NAT	Wed, May 3, 2000	14.00	14.19	14.00	14.19
574	NYSE	NAT	Tue, May 2, 2000	14.12	14.25	14.12	14.12
573	NYSE	NAT	Mon, May 1, 2000	14.37	14.37	14.37	14.37
572	NYSE	NAT	Fri, Apr 28, 2000	14.25	14.25	14.25	14.25
571	NYSE	NAT	Thu, Apr 27, 2000	13.75	14.25	13.75	14.12
570	NYSE	NAT	Wed, Apr 26, 2000	14.31	14.37	14.31	14.37
569	NYSE	NAT	Tue, Apr 25, 2000	14.37	14.37	14.06	14.31
568	NYSE	NAT	Mon, Apr 24, 2000	14.62	14.87	14.62	14.87
567	NYSE	NAT	Thu, Apr 20, 2000	14.25	14.62	14.00	14.62
566	NYSE	NAT	Wed, Apr 19, 2000	14.37	14.37	14.00	14.00
565	NYSE	NAT	Tue, Apr 18, 2000	14.25	14.37	13.88	14.37
564	NYSE	NAT	Mon, Apr 17, 2000	14.00	14.25	13.88	14.25
563	NYSE	NAT	Fri, Apr 14, 2000	13.63	13.63	13.51	13.51
562	NYSE	NAT	Thu, Apr 13, 2000	13.63	13.75	13.51	13.63
561	NYSE	NAT	Wed, Apr 12, 2000	13.38	13.69	13.13	13.69
560	NYSE	NAT	Tue, Apr 11, 2000	12.51	13.88	12.51	13.26
559	NYSE	NAT	Mon, Apr 10, 2000	12.70	12.70	12.39	12.39
558	NYSE	NAT	Fri, Apr 7, 2000	12.51	12.64	12.51	12.64
557	NYSE	NAT	Thu, Apr 6, 2000	12.64	12.64	12.64	12.64
556	NYSE	NAT	Wed, Apr 5, 2000	12.45	12.64	12.45	12.64
555	NYSE	NAT	Tue, Apr 4, 2000	12.51	12.58	12.39	12.58
554	NYSE	NAT	Mon, Apr 3, 2000	12.51	12.58	12.45	12.45
553	NYSE	NAT	Fri, Mar 31, 2000	12.51	12.51	12.51	12.51
552	NYSE	NAT	Thu, Mar 30, 2000	12.39	12.39	12.39	12.39
551	NYSE	NAT	Wed, Mar 29, 2000	12.33	12.64	12.33	12.64
550	NYSE	NAT	Tue, Mar 28, 2000	11.89	12.14	11.89	12.14
549	NYSE	NAT	Mon, Mar 27, 2000	11.65	11.77	11.40	11.77
548	NYSE	NAT	Fri, Mar 24, 2000	11.65	11.65	11.40	11.65
547	NYSE	NAT	Thu, Mar 23, 2000	11.71	11.71	11.65	11.65
546	NYSE	NAT	Wed, Mar 22, 2000	11.77	11.83	11.65	11.65
545	NYSE	NAT	Tue, Mar 21, 2000	12.02	12.02	11.65	11.77
544	NYSE	NAT	Mon, Mar 20, 2000	11.89	12.02	11.89	12.02
543	NYSE	NAT	Fri, Mar 17, 2000	11.89	11.89	11.77	11.83
542	NYSE	NAT	Thu, Mar 16, 2000	11.89	11.89	11.77	11.77
541	NYSE	NAT	Wed, Mar 15, 2000	12.14	12.39	11.89	11.89
540	NYSE	NAT	Tue, Mar 14, 2000	11.52	12.64	11.52	11.65
539	NYSE	NAT	Mon, Mar 13, 2000	11.52	11.52	11.52	11.52
538	NYSE	NAT	Fri, Mar 10, 2000	11.40	11.65	11.34	11.40
537	NYSE	NAT	Thu, Mar 9, 2000	11.15	11.34	11.15	11.15
536	NYSE	NAT	Wed, Mar 8, 2000	10.90	11.34	10.90	11.15
535	NYSE	NAT	Tue, Mar 7, 2000	11.21	11.21	10.78	10.90
534	NYSE	NAT	Mon, Mar 6, 2000	11.21	11.27	11.21	11.27
533	NYSE	NAT	Fri, Mar 3, 2000	11.21	11.27	11.21	11.27
532	NYSE	NAT	Thu, Mar 2, 2000	11.27	11.34	11.27	11.34
531	NYSE	NAT	Wed, Mar 1, 2000	10.90	11.27	10.90	11.27
530	NYSE	NAT	Tue, Feb 29, 2000	11.27	11.27	11.03	11.03
529	NYSE	NAT	Mon, Feb 28, 2000	11.15	11.15	11.15	11.15
528	NYSE	NAT	Fri, Feb 25, 2000	10.90	11.03	10.78	11.03
527	NYSE	NAT	Thu, Feb 24, 2000	11.15	11.15	10.90	10.90
526	NYSE	NAT	Tue, Feb 22, 2000	10.78	10.90	10.78	10.90
525	NYSE	NAT	Fri, Feb 18, 2000	10.66	10.90	10.53	10.53
524	NYSE	NAT	Thu, Feb 17, 2000	10.78	10.78	10.78	10.78
523	NYSE	NAT	Wed, Feb 16, 2000	10.90	10.90	10.66	10.90
522	NYSE	NAT	Tue, Feb 15, 2000	10.41	11.03	10.35	11.03
521	NYSE	NAT	Mon, Feb 14, 2000	10.41	10.41	10.35	10.35
520	NYSE	NAT	Fri, Feb 11, 2000	10.41	10.41	10.16	10.41
519	NYSE	NAT	Thu, Feb 10, 2000	10.41	10.41	10.28	10.28
518	NYSE	NAT	Wed, Feb 9, 2000	10.16	10.16	10.04	10.16
517	NYSE	NAT	Tue, Feb 8, 2000	10.28	10.28	10.28	10.28
516	NYSE	NAT	Mon, Feb 7, 2000	10.04	10.16	10.04	10.16
515	NYSE	NAT	Fri, Feb 4, 2000	10.28	10.28	10.16	10.16
514	NYSE	NAT	Thu, Feb 3, 2000	10.28	10.53	10.16	10.16
513	NYSE	NAT	Wed, Feb 2, 2000	10.41	10.41	10.16	10.16
512	NYSE	NAT	Tue, Feb 1, 2000	10.53	10.53	10.41	10.41
511	NYSE	NAT	Fri, Jan 28, 2000	10.28	10.41	10.22	10.41
510	NYSE	NAT	Wed, Jan 26, 2000	10.28	10.41	10.28	10.41
509	NYSE	NAT	Tue, Jan 25, 2000	10.16	10.16	10.16	10.16
508	NYSE	NAT	Mon, Jan 24, 2000	10.66	10.66	10.66	10.66
507	NYSE	NAT	Fri, Jan 21, 2000	10.66	10.66	10.66	10.66
506	NYSE	NAT	Wed, Jan 19, 2000	10.66	10.66	10.66	10.66
505	NYSE	NAT	Tue, Jan 18, 2000	10.66	10.78	10.66	10.78
504	NYSE	NAT	Fri, Jan 14, 2000	10.90	10.90	10.53	10.53
503	NYSE	NAT	Thu, Jan 13, 2000	10.72	10.90	10.72	10.90
502	NYSE	NAT	Wed, Jan 12, 2000	10.41	10.53	10.41	10.53
501	NYSE	NAT	Tue, Jan 11, 2000	10.66	10.66	10.28	10.28
500	NYSE	NAT	Mon, Jan 10, 2000	10.66	10.66	10.66	10.66
499	NYSE	NAT	Fri, Jan 7, 2000	10.53	10.66	10.53	10.66
498	NYSE	NAT	Thu, Jan 6, 2000	10.66	10.66	10.66	10.66
497	NYSE	NAT	Wed, Jan 5, 2000	10.66	10.66	10.66	10.66
496	NYSE	NAT	Mon, Jan 3, 2000	10.59	10.59	10.59	10.59
495	NYSE	NAT	Fri, Dec 31, 1999	10.16	10.53	10.16	10.53
494	NYSE	NAT	Thu, Dec 30, 1999	10.53	10.66	9.79	10.04
493	NYSE	NAT	Wed, Dec 29, 1999	10.66	10.66	10.41	10.41
492	NYSE	NAT	Tue, Dec 28, 1999	10.41	10.66	10.28	10.66
491	NYSE	NAT	Mon, Dec 27, 1999	10.28	10.28	10.16	10.16
490	NYSE	NAT	Thu, Dec 23, 1999	10.41	10.41	10.35	10.35
489	NYSE	NAT	Wed, Dec 22, 1999	10.53	10.66	10.41	10.41
488	NYSE	NAT	Tue, Dec 21, 1999	10.35	10.53	10.35	10.53
487	NYSE	NAT	Fri, Dec 17, 1999	10.28	10.28	10.28	10.28
486	NYSE	NAT	Thu, Dec 16, 1999	10.10	10.28	10.10	10.28
485	NYSE	NAT	Wed, Dec 15, 1999	9.91	10.10	9.91	10.10
484	NYSE	NAT	Tue, Dec 14, 1999	10.04	10.16	9.79	10.04
483	NYSE	NAT	Mon, Dec 13, 1999	10.16	10.28	10.16	10.28
482	NYSE	NAT	Fri, Dec 10, 1999	10.53	10.53	10.28	10.28
481	NYSE	NAT	Thu, Dec 9, 1999	10.78	10.78	10.53	10.66
480	NYSE	NAT	Wed, Dec 8, 1999	10.66	10.66	10.53	10.53
479	NYSE	NAT	Tue, Dec 7, 1999	10.90	10.90	10.78	10.78
478	NYSE	NAT	Mon, Dec 6, 1999	10.66	10.78	10.66	10.78
477	NYSE	NAT	Fri, Dec 3, 1999	10.59	10.66	10.53	10.53
476	NYSE	NAT	Thu, Dec 2, 1999	10.47	10.66	10.47	10.59
475	NYSE	NAT	Wed, Dec 1, 1999	10.28	10.59	10.28	10.59
474	NYSE	NAT	Tue, Nov 30, 1999	10.41	10.41	10.28	10.41
473	NYSE	NAT	Mon, Nov 29, 1999	10.90	10.90	10.41	10.53
472	NYSE	NAT	Wed, Nov 24, 1999	10.90	10.90	10.66	10.84
471	NYSE	NAT	Tue, Nov 23, 1999	10.41	10.90	10.28	10.90
470	NYSE	NAT	Mon, Nov 22, 1999	10.78	10.78	10.53	10.53
469	NYSE	NAT	Fri, Nov 19, 1999	10.53	10.66	10.53	10.66
468	NYSE	NAT	Thu, Nov 18, 1999	10.41	10.41	10.28	10.41
467	NYSE	NAT	Wed, Nov 17, 1999	10.28	10.28	10.28	10.28
466	NYSE	NAT	Tue, Nov 16, 1999	10.41	10.41	10.41	10.41
465	NYSE	NAT	Mon, Nov 15, 1999	10.35	10.41	10.28	10.28
464	NYSE	NAT	Fri, Nov 12, 1999	10.28	10.35	10.16	10.35
463	NYSE	NAT	Thu, Nov 11, 1999	10.16	10.28	10.16	10.16
462	NYSE	NAT	Wed, Nov 10, 1999	10.53	10.53	10.16	10.16
461	NYSE	NAT	Tue, Nov 9, 1999	10.53	10.59	10.28	10.41
460	NYSE	NAT	Mon, Nov 8, 1999	10.53	10.53	10.53	10.53
459	NYSE	NAT	Fri, Nov 5, 1999	10.53	10.53	10.53	10.53
458	NYSE	NAT	Thu, Nov 4, 1999	10.47	10.66	10.47	10.53
457	NYSE	NAT	Wed, Nov 3, 1999	10.41	10.41	10.16	10.35
456	NYSE	NAT	Tue, Nov 2, 1999	10.78	10.90	10.53	10.53
455	NYSE	NAT	Mon, Nov 1, 1999	10.41	10.66	10.41	10.66
454	NYSE	NAT	Fri, Oct 29, 1999	10.66	10.66	10.16	10.41
453	NYSE	NAT	Wed, Oct 27, 1999	10.66	10.90	10.66	10.90
452	NYSE	NAT	Tue, Oct 26, 1999	10.90	10.90	10.78	10.90
451	NYSE	NAT	Mon, Oct 25, 1999	10.53	10.90	10.53	10.90
450	NYSE	NAT	Fri, Oct 22, 1999	11.21	11.21	11.03	11.03
449	NYSE	NAT	Wed, Oct 20, 1999	11.52	11.52	11.15	11.15
448	NYSE	NAT	Tue, Oct 19, 1999	11.27	11.65	11.15	11.65
447	NYSE	NAT	Mon, Oct 18, 1999	11.27	11.27	11.15	11.15
446	NYSE	NAT	Fri, Oct 15, 1999	11.52	11.52	11.40	11.40
445	NYSE	NAT	Wed, Oct 13, 1999	11.65	11.71	11.65	11.65
444	NYSE	NAT	Tue, Oct 12, 1999	11.65	11.65	11.65	11.65
443	NYSE	NAT	Mon, Oct 11, 1999	11.65	11.65	11.52	11.52
442	NYSE	NAT	Fri, Oct 8, 1999	11.52	11.65	11.52	11.52
441	NYSE	NAT	Thu, Oct 7, 1999	11.77	11.89	11.52	11.52
440	NYSE	NAT	Wed, Oct 6, 1999	11.83	11.89	11.77	11.89
439	NYSE	NAT	Tue, Oct 5, 1999	11.65	11.65	11.65	11.65
438	NYSE	NAT	Mon, Oct 4, 1999	11.65	11.65	11.65	11.65
437	NYSE	NAT	Fri, Oct 1, 1999	11.89	11.89	11.89	11.89
436	NYSE	NAT	Thu, Sep 30, 1999	11.89	11.89	11.83	11.89
435	NYSE	NAT	Wed, Sep 29, 1999	11.71	11.83	11.71	11.83
434	NYSE	NAT	Tue, Sep 28, 1999	11.89	11.96	11.71	11.71
433	NYSE	NAT	Mon, Sep 27, 1999	12.02	12.02	12.02	12.02
432	NYSE	NAT	Thu, Sep 23, 1999	12.02	12.02	12.02	12.02
431	NYSE	NAT	Wed, Sep 22, 1999	12.02	12.02	12.02	12.02
430	NYSE	NAT	Tue, Sep 21, 1999	11.83	12.02	11.83	12.02
429	NYSE	NAT	Mon, Sep 20, 1999	11.65	11.77	11.65	11.77
428	NYSE	NAT	Fri, Sep 17, 1999	11.89	11.89	11.89	11.89
427	NYSE	NAT	Thu, Sep 16, 1999	11.89	11.89	11.65	11.77
426	NYSE	NAT	Wed, Sep 15, 1999	11.89	11.89	11.89	11.89
425	NYSE	NAT	Tue, Sep 14, 1999	11.89	11.89	11.89	11.89
424	NYSE	NAT	Mon, Sep 13, 1999	11.89	11.89	11.89	11.89
423	NYSE	NAT	Fri, Sep 10, 1999	12.14	12.14	11.89	11.89
422	NYSE	NAT	Wed, Sep 8, 1999	12.27	12.27	12.20	12.27
421	NYSE	NAT	Tue, Sep 7, 1999	12.39	12.39	12.39	12.39
420	NYSE	NAT	Fri, Sep 3, 1999	12.39	12.39	12.27	12.27
419	NYSE	NAT	Thu, Sep 2, 1999	12.39	12.39	12.20	12.20
418	NYSE	NAT	Tue, Aug 31, 1999	12.39	12.39	12.39	12.39
417	NYSE	NAT	Mon, Aug 30, 1999	12.39	12.39	12.14	12.14
416	NYSE	NAT	Fri, Aug 27, 1999	12.39	12.39	12.39	12.39
415	NYSE	NAT	Thu, Aug 26, 1999	12.39	12.39	12.39	12.39
414	NYSE	NAT	Wed, Aug 25, 1999	12.39	12.39	12.39	12.39
413	NYSE	NAT	Tue, Aug 24, 1999	12.39	12.39	12.39	12.39
412	NYSE	NAT	Thu, Aug 19, 1999	12.20	12.27	12.20	12.27
411	NYSE	NAT	Fri, Aug 13, 1999	12.51	12.51	12.02	12.02
410	NYSE	NAT	Thu, Aug 12, 1999	12.51	12.51	12.51	12.51
409	NYSE	NAT	Wed, Aug 11, 1999	12.14	12.39	12.02	12.39
408	NYSE	NAT	Tue, Aug 10, 1999	12.39	12.39	12.20	12.20
407	NYSE	NAT	Mon, Aug 9, 1999	12.27	12.39	12.27	12.39
406	NYSE	NAT	Thu, Aug 5, 1999	12.14	12.14	12.14	12.14
405	NYSE	NAT	Wed, Aug 4, 1999	12.27	12.27	12.02	12.02
404	NYSE	NAT	Tue, Aug 3, 1999	12.02	12.27	12.02	12.02
403	NYSE	NAT	Mon, Aug 2, 1999	11.77	12.14	11.77	12.14
402	NYSE	NAT	Fri, Jul 30, 1999	11.77	11.96	11.65	11.65
401	NYSE	NAT	Thu, Jul 29, 1999	11.89	11.96	11.65	11.71
400	NYSE	NAT	Wed, Jul 28, 1999	11.89	12.02	11.89	12.02
399	NYSE	NAT	Tue, Jul 27, 1999	11.77	11.77	11.77	11.77
398	NYSE	NAT	Mon, Jul 26, 1999	11.96	12.02	11.96	12.02
397	NYSE	NAT	Fri, Jul 23, 1999	11.77	11.77	11.77	11.77
396	NYSE	NAT	Wed, Jul 21, 1999	12.39	12.39	12.20	12.20
395	NYSE	NAT	Tue, Jul 20, 1999	12.51	12.51	12.39	12.39
394	NYSE	NAT	Mon, Jul 19, 1999	12.51	12.51	12.33	12.39
393	NYSE	NAT	Fri, Jul 16, 1999	12.27	12.64	12.27	12.51
392	NYSE	NAT	Thu, Jul 15, 1999	12.02	12.02	12.02	12.02
391	NYSE	NAT	Wed, Jul 14, 1999	12.02	12.14	11.89	11.89
390	NYSE	NAT	Tue, Jul 13, 1999	12.02	12.14	11.89	12.14
389	NYSE	NAT	Mon, Jul 12, 1999	11.77	12.14	11.77	12.02
388	NYSE	NAT	Fri, Jul 9, 1999	11.52	11.77	11.52	11.77
387	NYSE	NAT	Thu, Jul 8, 1999	11.65	11.65	11.52	11.52
386	NYSE	NAT	Wed, Jul 7, 1999	11.15	11.52	11.15	11.52
385	NYSE	NAT	Fri, Jul 2, 1999	11.27	11.27	11.21	11.21
384	NYSE	NAT	Thu, Jul 1, 1999	11.27	11.27	11.27	11.27
383	NYSE	NAT	Wed, Jun 30, 1999	11.40	11.40	11.40	11.40
382	NYSE	NAT	Mon, Jun 28, 1999	11.52	11.52	11.52	11.52
381	NYSE	NAT	Fri, Jun 25, 1999	11.46	11.52	11.46	11.52
380	NYSE	NAT	Wed, Jun 23, 1999	11.52	11.52	11.46	11.46
379	NYSE	NAT	Tue, Jun 22, 1999	11.40	11.40	11.40	11.40
378	NYSE	NAT	Mon, Jun 21, 1999	11.52	11.52	11.34	11.40
377	NYSE	NAT	Thu, Jun 17, 1999	11.52	11.52	11.40	11.40
376	NYSE	NAT	Wed, Jun 16, 1999	11.40	11.40	11.40	11.40
375	NYSE	NAT	Tue, Jun 15, 1999	11.40	11.40	11.27	11.27
374	NYSE	NAT	Mon, Jun 14, 1999	11.34	11.34	11.34	11.34
373	NYSE	NAT	Fri, Jun 11, 1999	11.52	11.52	11.40	11.46
372	NYSE	NAT	Wed, Jun 9, 1999	11.52	11.52	11.52	11.52
371	NYSE	NAT	Tue, Jun 8, 1999	11.40	11.40	11.40	11.40
370	NYSE	NAT	Mon, Jun 7, 1999	11.40	11.52	11.40	11.40
369	NYSE	NAT	Fri, Jun 4, 1999	11.40	11.40	10.78	11.15
368	NYSE	NAT	Thu, Jun 3, 1999	11.52	11.52	11.52	11.52
367	NYSE	NAT	Wed, Jun 2, 1999	11.52	11.52	11.52	11.52
366	NYSE	NAT	Tue, Jun 1, 1999	11.58	11.58	11.52	11.52
365	NYSE	NAT	Fri, May 28, 1999	11.15	11.46	11.15	11.46
364	NYSE	NAT	Thu, May 27, 1999	11.27	11.40	10.90	10.90
363	NYSE	NAT	Wed, May 26, 1999	11.34	11.34	11.34	11.34
362	NYSE	NAT	Tue, May 25, 1999	11.40	11.46	11.40	11.46
361	NYSE	NAT	Mon, May 24, 1999	11.52	11.52	11.27	11.27
360	NYSE	NAT	Fri, May 21, 1999	11.52	11.52	11.34	11.34
359	NYSE	NAT	Thu, May 20, 1999	11.52	11.52	11.40	11.52
358	NYSE	NAT	Wed, May 19, 1999	11.27	11.40	11.27	11.40
357	NYSE	NAT	Tue, May 18, 1999	11.15	11.40	11.15	11.40
356	NYSE	NAT	Mon, May 17, 1999	11.15	11.40	11.15	11.15
355	NYSE	NAT	Thu, May 13, 1999	11.65	11.65	11.34	11.40
354	NYSE	NAT	Tue, May 11, 1999	11.58	11.58	11.58	11.58
353	NYSE	NAT	Mon, May 10, 1999	11.52	11.65	11.52	11.52
352	NYSE	NAT	Fri, May 7, 1999	11.40	11.52	11.40	11.52
351	NYSE	NAT	Thu, May 6, 1999	11.40	11.40	11.40	11.40
350	NYSE	NAT	Wed, May 5, 1999	11.27	11.27	11.27	11.27
349	NYSE	NAT	Tue, May 4, 1999	11.40	11.40	11.40	11.40
348	NYSE	NAT	Mon, May 3, 1999	10.90	11.15	10.78	11.15
347	NYSE	NAT	Fri, Apr 30, 1999	10.78	10.78	10.66	10.78
346	NYSE	NAT	Thu, Apr 29, 1999	11.15	11.15	10.90	10.90
345	NYSE	NAT	Wed, Apr 28, 1999	11.27	11.27	11.27	11.27
344	NYSE	NAT	Tue, Apr 27, 1999	11.15	11.27	11.03	11.15
343	NYSE	NAT	Mon, Apr 26, 1999	11.40	11.52	11.40	11.52
342	NYSE	NAT	Fri, Apr 23, 1999	11.27	11.40	11.27	11.40
341	NYSE	NAT	Thu, Apr 22, 1999	11.27	11.27	11.15	11.15
340	NYSE	NAT	Wed, Apr 21, 1999	11.27	11.27	11.03	11.15
339	NYSE	NAT	Tue, Apr 20, 1999	11.46	11.52	11.27	11.27
338	NYSE	NAT	Fri, Apr 16, 1999	11.40	11.40	11.40	11.40
337	NYSE	NAT	Thu, Apr 15, 1999	11.27	11.46	11.15	11.46
336	NYSE	NAT	Wed, Apr 14, 1999	11.46	11.46	11.46	11.46
335	NYSE	NAT	Tue, Apr 13, 1999	11.40	11.40	11.34	11.34
334	NYSE	NAT	Mon, Apr 12, 1999	11.40	11.52	11.40	11.52
333	NYSE	NAT	Fri, Apr 9, 1999	11.34	11.52	11.34	11.34
332	NYSE	NAT	Thu, Apr 8, 1999	11.27	11.40	11.27	11.34
331	NYSE	NAT	Wed, Apr 7, 1999	11.34	11.40	11.34	11.40
330	NYSE	NAT	Tue, Apr 6, 1999	11.27	11.34	11.27	11.34
329	NYSE	NAT	Mon, Apr 5, 1999	11.27	11.27	11.27	11.27
328	NYSE	NAT	Thu, Apr 1, 1999	11.21	11.21	11.21	11.21
327	NYSE	NAT	Wed, Mar 31, 1999	11.40	11.40	11.27	11.40
326	NYSE	NAT	Tue, Mar 30, 1999	11.52	11.52	11.40	11.40
325	NYSE	NAT	Mon, Mar 29, 1999	11.58	11.58	11.52	11.52
324	NYSE	NAT	Fri, Mar 26, 1999	11.27	11.40	11.27	11.40
323	NYSE	NAT	Thu, Mar 25, 1999	11.15	11.15	11.15	11.15
322	NYSE	NAT	Wed, Mar 24, 1999	11.27	11.27	11.27	11.27
321	NYSE	NAT	Tue, Mar 23, 1999	10.90	11.15	10.90	11.15
320	NYSE	NAT	Mon, Mar 22, 1999	11.15	11.15	10.90	10.90
319	NYSE	NAT	Fri, Mar 19, 1999	10.90	11.15	10.78	11.15
318	NYSE	NAT	Thu, Mar 18, 1999	11.15	11.15	10.90	10.90
317	NYSE	NAT	Wed, Mar 17, 1999	11.03	11.15	11.03	11.15
316	NYSE	NAT	Mon, Mar 15, 1999	10.90	10.90	10.90	10.90
315	NYSE	NAT	Fri, Mar 12, 1999	10.97	10.97	10.97	10.97
314	NYSE	NAT	Thu, Mar 11, 1999	11.15	11.15	11.03	11.03
313	NYSE	NAT	Wed, Mar 10, 1999	11.09	11.15	11.09	11.15
312	NYSE	NAT	Tue, Mar 9, 1999	11.03	11.15	11.03	11.15
311	NYSE	NAT	Mon, Mar 8, 1999	11.15	11.15	11.03	11.03
310	NYSE	NAT	Fri, Mar 5, 1999	11.15	11.27	11.15	11.27
309	NYSE	NAT	Thu, Mar 4, 1999	10.90	11.03	10.90	11.03
308	NYSE	NAT	Wed, Mar 3, 1999	11.03	11.03	10.97	10.97
307	NYSE	NAT	Tue, Mar 2, 1999	11.03	11.03	11.03	11.03
306	NYSE	NAT	Mon, Mar 1, 1999	11.15	11.15	11.03	11.03
305	NYSE	NAT	Fri, Feb 26, 1999	11.03	11.15	11.03	11.15
304	NYSE	NAT	Thu, Feb 25, 1999	10.90	11.15	10.90	11.15
303	NYSE	NAT	Wed, Feb 24, 1999	11.03	11.15	10.90	10.90
302	NYSE	NAT	Tue, Feb 23, 1999	11.15	11.15	11.03	11.03
301	NYSE	NAT	Mon, Feb 22, 1999	10.90	11.27	10.90	11.27
300	NYSE	NAT	Fri, Feb 19, 1999	11.15	11.15	10.90	11.03
299	NYSE	NAT	Thu, Feb 18, 1999	11.15	11.27	11.15	11.27
298	NYSE	NAT	Wed, Feb 17, 1999	11.15	11.27	11.15	11.27
297	NYSE	NAT	Tue, Feb 16, 1999	11.15	11.27	11.03	11.03
296	NYSE	NAT	Fri, Feb 12, 1999	11.34	11.34	11.03	11.03
295	NYSE	NAT	Thu, Feb 11, 1999	11.65	11.65	11.15	11.27
294	NYSE	NAT	Wed, Feb 10, 1999	10.53	10.78	10.53	10.78
293	NYSE	NAT	Tue, Feb 9, 1999	9.91	10.16	9.54	10.16
292	NYSE	NAT	Mon, Feb 8, 1999	10.16	10.22	10.04	10.04
291	NYSE	NAT	Fri, Feb 5, 1999	10.59	10.59	10.53	10.53
290	NYSE	NAT	Thu, Feb 4, 1999	10.53	10.66	10.53	10.53
289	NYSE	NAT	Wed, Feb 3, 1999	10.78	11.03	10.66	10.66
288	NYSE	NAT	Tue, Feb 2, 1999	10.78	10.78	10.78	10.78
287	NYSE	NAT	Mon, Feb 1, 1999	10.78	10.78	10.78	10.78
286	NYSE	NAT	Fri, Jan 29, 1999	10.59	10.66	10.53	10.66
285	NYSE	NAT	Thu, Jan 28, 1999	10.59	10.59	10.59	10.59
284	NYSE	NAT	Wed, Jan 27, 1999	10.90	10.90	10.59	10.72
283	NYSE	NAT	Tue, Jan 26, 1999	10.97	10.97	10.78	10.90
282	NYSE	NAT	Mon, Jan 25, 1999	11.03	11.09	10.90	10.97
281	NYSE	NAT	Fri, Jan 22, 1999	11.27	11.40	11.27	11.40
280	NYSE	NAT	Thu, Jan 21, 1999	11.27	11.27	11.27	11.27
279	NYSE	NAT	Wed, Jan 20, 1999	11.52	11.52	11.40	11.40
278	NYSE	NAT	Tue, Jan 19, 1999	11.40	11.40	11.40	11.40
277	NYSE	NAT	Fri, Jan 15, 1999	11.40	11.52	11.40	11.40
276	NYSE	NAT	Thu, Jan 14, 1999	11.21	11.34	11.21	11.34
275	NYSE	NAT	Wed, Jan 13, 1999	11.27	11.27	11.15	11.15
274	NYSE	NAT	Tue, Jan 12, 1999	11.40	11.40	11.27	11.27
273	NYSE	NAT	Mon, Jan 11, 1999	11.03	11.27	10.90	11.27
272	NYSE	NAT	Fri, Jan 8, 1999	11.15	11.15	11.03	11.03
271	NYSE	NAT	Thu, Jan 7, 1999	11.15	11.27	11.15	11.15
270	NYSE	NAT	Wed, Jan 6, 1999	11.15	11.15	11.15	11.15
269	NYSE	NAT	Tue, Jan 5, 1999	11.15	11.15	11.15	11.15
268	NYSE	NAT	Mon, Jan 4, 1999	11.40	11.40	10.90	10.90
267	NYSE	NAT	Thu, Dec 31, 1998	10.90	11.52	10.90	11.40
266	NYSE	NAT	Wed, Dec 30, 1998	10.66	11.03	10.53	10.78
265	NYSE	NAT	Tue, Dec 29, 1998	10.90	10.90	10.53	10.66
264	NYSE	NAT	Mon, Dec 28, 1998	11.27	11.40	10.66	10.66
263	NYSE	NAT	Thu, Dec 24, 1998	11.71	11.71	11.03	11.15
262	NYSE	NAT	Wed, Dec 23, 1998	11.65	11.65	11.65	11.65
261	NYSE	NAT	Tue, Dec 22, 1998	11.89	11.89	11.65	11.65
260	NYSE	NAT	Mon, Dec 21, 1998	12.27	12.27	11.89	11.89
259	NYSE	NAT	Thu, Dec 17, 1998	12.27	12.27	12.27	12.27
258	NYSE	NAT	Tue, Dec 15, 1998	12.51	12.51	12.14	12.14
257	NYSE	NAT	Fri, Dec 11, 1998	12.51	12.51	12.27	12.39
256	NYSE	NAT	Thu, Dec 10, 1998	12.51	12.51	12.51	12.51
255	NYSE	NAT	Wed, Dec 9, 1998	12.39	12.39	12.39	12.39
254	NYSE	NAT	Tue, Dec 8, 1998	12.51	12.51	12.51	12.51
253	NYSE	NAT	Mon, Dec 7, 1998	13.13	13.13	12.51	12.51
252	NYSE	NAT	Fri, Dec 4, 1998	12.64	13.38	12.64	13.38
251	NYSE	NAT	Thu, Dec 3, 1998	12.51	12.51	12.39	12.39
250	NYSE	NAT	Mon, Nov 30, 1998	12.64	12.64	12.45	12.51
249	NYSE	NAT	Fri, Nov 27, 1998	12.64	12.64	12.64	12.64
248	NYSE	NAT	Wed, Nov 25, 1998	12.45	12.51	12.45	12.51
247	NYSE	NAT	Tue, Nov 24, 1998	12.45	12.51	12.45	12.51
246	NYSE	NAT	Mon, Nov 23, 1998	12.51	12.51	12.45	12.45
245	NYSE	NAT	Fri, Nov 20, 1998	12.51	12.51	12.39	12.51
244	NYSE	NAT	Thu, Nov 19, 1998	12.51	12.51	12.51	12.51
243	NYSE	NAT	Wed, Nov 18, 1998	12.51	12.51	12.51	12.51
242	NYSE	NAT	Tue, Nov 17, 1998	12.51	12.51	12.51	12.51
241	NYSE	NAT	Mon, Nov 16, 1998	12.64	12.64	12.51	12.51
240	NYSE	NAT	Fri, Nov 13, 1998	12.76	12.76	12.64	12.64
239	NYSE	NAT	Thu, Nov 12, 1998	12.76	12.76	12.70	12.76
238	NYSE	NAT	Wed, Nov 11, 1998	12.64	12.76	12.64	12.64
237	NYSE	NAT	Tue, Nov 10, 1998	12.64	12.64	12.64	12.64
236	NYSE	NAT	Mon, Nov 9, 1998	12.64	12.64	12.64	12.64
235	NYSE	NAT	Fri, Nov 6, 1998	12.64	12.89	12.64	12.89
234	NYSE	NAT	Wed, Nov 4, 1998	12.58	12.89	12.58	12.76
233	NYSE	NAT	Tue, Nov 3, 1998	12.58	12.58	12.58	12.58
232	NYSE	NAT	Mon, Nov 2, 1998	12.51	12.51	12.51	12.51
231	NYSE	NAT	Fri, Oct 30, 1998	12.39	12.64	12.39	12.51
230	NYSE	NAT	Thu, Oct 29, 1998	12.14	12.39	12.14	12.14
229	NYSE	NAT	Wed, Oct 28, 1998	11.89	11.89	11.77	11.77
228	NYSE	NAT	Tue, Oct 27, 1998	11.83	11.89	11.77	11.77
227	NYSE	NAT	Mon, Oct 26, 1998	11.77	11.89	11.77	11.77
226	NYSE	NAT	Fri, Oct 23, 1998	11.83	11.83	11.77	11.83
225	NYSE	NAT	Thu, Oct 22, 1998	11.89	12.27	11.89	12.14
224	NYSE	NAT	Wed, Oct 21, 1998	12.20	12.20	11.89	11.89
223	NYSE	NAT	Tue, Oct 20, 1998	12.39	12.51	12.27	12.27
222	NYSE	NAT	Mon, Oct 19, 1998	12.39	12.39	12.39	12.39
221	NYSE	NAT	Fri, Oct 16, 1998	12.33	12.33	12.33	12.33
220	NYSE	NAT	Thu, Oct 15, 1998	12.45	12.45	12.27	12.27
219	NYSE	NAT	Wed, Oct 14, 1998	12.51	12.51	12.39	12.39
218	NYSE	NAT	Tue, Oct 13, 1998	12.39	12.51	12.39	12.51
217	NYSE	NAT	Mon, Oct 12, 1998	12.39	12.39	12.20	12.20
216	NYSE	NAT	Fri, Oct 9, 1998	12.64	12.64	12.64	12.64
215	NYSE	NAT	Thu, Oct 8, 1998	12.27	12.64	12.14	12.64
214	NYSE	NAT	Wed, Oct 7, 1998	12.51	12.51	12.39	12.39
213	NYSE	NAT	Tue, Oct 6, 1998	12.51	12.64	12.51	12.64
212	NYSE	NAT	Fri, Oct 2, 1998	12.64	12.64	12.64	12.64
211	NYSE	NAT	Wed, Sep 30, 1998	12.51	12.64	12.51	12.64
210	NYSE	NAT	Tue, Sep 29, 1998	12.64	12.64	12.64	12.64
209	NYSE	NAT	Mon, Sep 28, 1998	12.64	12.64	12.64	12.64
208	NYSE	NAT	Fri, Sep 25, 1998	12.51	12.64	12.51	12.64
207	NYSE	NAT	Thu, Sep 24, 1998	12.64	12.64	12.45	12.45
206	NYSE	NAT	Wed, Sep 23, 1998	12.76	13.01	12.70	12.70
205	NYSE	NAT	Tue, Sep 22, 1998	12.89	12.89	12.89	12.89
204	NYSE	NAT	Mon, Sep 21, 1998	13.13	13.13	13.13	13.13
203	NYSE	NAT	Thu, Sep 17, 1998	13.01	13.13	13.01	13.13
202	NYSE	NAT	Wed, Sep 16, 1998	12.76	13.13	12.76	13.13
201	NYSE	NAT	Tue, Sep 15, 1998	12.39	12.70	12.39	12.70
200	NYSE	NAT	Fri, Sep 11, 1998	12.33	12.39	12.14	12.14
199	NYSE	NAT	Tue, Sep 8, 1998	12.27	12.27	12.14	12.20
198	NYSE	NAT	Fri, Sep 4, 1998	12.51	12.51	12.27	12.39
197	NYSE	NAT	Thu, Sep 3, 1998	13.01	13.01	12.76	12.76
196	NYSE	NAT	Wed, Sep 2, 1998	13.13	13.13	13.13	13.13
195	NYSE	NAT	Tue, Sep 1, 1998	13.13	13.13	13.13	13.13
194	NYSE	NAT	Mon, Aug 31, 1998	13.51	13.51	13.01	13.01
193	NYSE	NAT	Fri, Aug 28, 1998	13.57	13.63	13.57	13.63
192	NYSE	NAT	Thu, Aug 27, 1998	13.51	13.69	13.51	13.69
191	NYSE	NAT	Mon, Aug 24, 1998	13.51	13.51	13.38	13.38
190	NYSE	NAT	Thu, Aug 20, 1998	13.75	13.75	13.63	13.63
189	NYSE	NAT	Mon, Aug 17, 1998	13.75	13.75	13.75	13.75
188	NYSE	NAT	Thu, Aug 13, 1998	13.88	13.88	13.88	13.88
187	NYSE	NAT	Wed, Aug 12, 1998	13.75	13.75	13.75	13.75
186	NYSE	NAT	Mon, Aug 10, 1998	13.63	13.81	13.63	13.69
185	NYSE	NAT	Fri, Aug 7, 1998	13.63	13.63	13.63	13.63
184	NYSE	NAT	Thu, Aug 6, 1998	13.44	13.51	13.44	13.51
183	NYSE	NAT	Wed, Aug 5, 1998	13.63	13.63	13.63	13.63
182	NYSE	NAT	Mon, Aug 3, 1998	13.57	13.63	13.51	13.51
181	NYSE	NAT	Fri, Jul 31, 1998	13.63	13.69	13.57	13.69
180	NYSE	NAT	Thu, Jul 30, 1998	13.75	13.75	13.75	13.75
179	NYSE	NAT	Wed, Jul 29, 1998	13.88	13.88	13.88	13.88
178	NYSE	NAT	Tue, Jul 28, 1998	13.63	13.75	13.51	13.63
177	NYSE	NAT	Mon, Jul 27, 1998	13.88	13.88	13.63	13.63
176	NYSE	NAT	Fri, Jul 24, 1998	14.00	14.00	14.00	14.00
175	NYSE	NAT	Wed, Jul 22, 1998	14.43	14.50	14.37	14.37
174	NYSE	NAT	Tue, Jul 21, 1998	14.50	14.50	14.25	14.25
173	NYSE	NAT	Mon, Jul 20, 1998	14.56	14.62	14.50	14.50
172	NYSE	NAT	Fri, Jul 17, 1998	14.37	14.56	14.37	14.56
171	NYSE	NAT	Thu, Jul 16, 1998	14.37	14.37	14.25	14.25
170	NYSE	NAT	Wed, Jul 15, 1998	14.62	14.62	14.37	14.37
169	NYSE	NAT	Tue, Jul 14, 1998	14.74	14.74	14.62	14.62
168	NYSE	NAT	Wed, Jul 8, 1998	14.87	14.87	14.87	14.87
167	NYSE	NAT	Wed, Jul 1, 1998	14.87	14.87	14.87	14.87
166	NYSE	NAT	Tue, Jun 30, 1998	14.93	15.05	14.93	14.93
165	NYSE	NAT	Mon, Jun 29, 1998	15.24	15.24	15.12	15.12
164	NYSE	NAT	Fri, Jun 26, 1998	15.36	15.36	15.36	15.36
163	NYSE	NAT	Thu, Jun 25, 1998	15.30	15.49	15.24	15.49
162	NYSE	NAT	Wed, Jun 24, 1998	15.49	15.49	15.36	15.43
161	NYSE	NAT	Tue, Jun 23, 1998	15.49	15.49	15.49	15.49
160	NYSE	NAT	Fri, Jun 19, 1998	15.36	15.36	15.36	15.36
159	NYSE	NAT	Thu, Jun 18, 1998	15.49	15.49	15.49	15.49
158	NYSE	NAT	Wed, Jun 17, 1998	15.49	15.49	15.49	15.49
157	NYSE	NAT	Fri, Jun 12, 1998	15.49	15.49	15.49	15.49
156	NYSE	NAT	Thu, Jun 11, 1998	15.49	15.49	15.49	15.49
155	NYSE	NAT	Wed, Jun 10, 1998	15.49	15.49	15.49	15.49
154	NYSE	NAT	Tue, Jun 9, 1998	15.49	15.55	15.49	15.55
153	NYSE	NAT	Mon, Jun 8, 1998	15.49	15.49	15.49	15.49
152	NYSE	NAT	Thu, Jun 4, 1998	15.49	15.49	15.49	15.49
151	NYSE	NAT	Wed, Jun 3, 1998	15.49	15.49	15.49	15.49
150	NYSE	NAT	Tue, Jun 2, 1998	15.36	15.49	15.36	15.49
149	NYSE	NAT	Mon, Jun 1, 1998	15.36	15.49	15.36	15.49
148	NYSE	NAT	Fri, May 29, 1998	15.24	15.36	15.24	15.36
147	NYSE	NAT	Thu, May 28, 1998	15.12	15.12	15.12	15.12
146	NYSE	NAT	Wed, May 27, 1998	14.74	14.99	14.74	14.99
145	NYSE	NAT	Tue, May 26, 1998	14.87	14.87	14.62	14.62
144	NYSE	NAT	Fri, May 22, 1998	14.87	14.87	14.74	14.87
143	NYSE	NAT	Thu, May 21, 1998	14.99	15.12	14.99	15.12
142	NYSE	NAT	Wed, May 20, 1998	15.12	15.12	15.12	15.12
141	NYSE	NAT	Tue, May 19, 1998	15.24	15.24	15.12	15.12
140	NYSE	NAT	Mon, May 18, 1998	15.36	15.36	15.36	15.36
139	NYSE	NAT	Fri, May 15, 1998	15.36	15.36	15.36	15.36
138	NYSE	NAT	Thu, May 14, 1998	15.30	15.36	15.30	15.36
137	NYSE	NAT	Tue, May 12, 1998	15.24	15.30	15.05	15.18
136	NYSE	NAT	Mon, May 11, 1998	15.36	15.36	15.36	15.36
135	NYSE	NAT	Fri, May 8, 1998	15.24	15.30	15.24	15.30
134	NYSE	NAT	Thu, May 7, 1998	15.12	15.24	14.99	15.24
133	NYSE	NAT	Tue, May 5, 1998	15.30	15.30	15.30	15.30
132	NYSE	NAT	Fri, May 1, 1998	15.30	15.30	15.12	15.30
131	NYSE	NAT	Thu, Apr 30, 1998	15.30	15.36	15.24	15.24
130	NYSE	NAT	Wed, Apr 29, 1998	15.30	15.30	15.30	15.30
129	NYSE	NAT	Tue, Apr 28, 1998	15.36	15.36	15.36	15.36
128	NYSE	NAT	Thu, Apr 23, 1998	15.36	15.36	15.36	15.36
127	NYSE	NAT	Wed, Apr 22, 1998	15.61	15.61	15.61	15.61
126	NYSE	NAT	Tue, Apr 21, 1998	15.61	15.74	15.61	15.61
125	NYSE	NAT	Mon, Apr 20, 1998	15.49	15.49	15.49	15.49
124	NYSE	NAT	Fri, Apr 17, 1998	15.74	15.86	15.61	15.61
123	NYSE	NAT	Thu, Apr 16, 1998	15.74	15.74	15.74	15.74
122	NYSE	NAT	Mon, Apr 13, 1998	15.74	15.74	15.74	15.74
121	NYSE	NAT	Thu, Apr 9, 1998	15.49	15.49	15.49	15.49
120	NYSE	NAT	Mon, Apr 6, 1998	15.61	15.61	15.61	15.61
119	NYSE	NAT	Fri, Apr 3, 1998	15.61	15.61	15.61	15.61
118	NYSE	NAT	Thu, Apr 2, 1998	15.61	15.74	15.61	15.61
117	NYSE	NAT	Wed, Apr 1, 1998	15.74	15.74	15.74	15.74
116	NYSE	NAT	Tue, Mar 31, 1998	15.86	15.86	15.86	15.86
115	NYSE	NAT	Thu, Mar 26, 1998	15.74	15.80	15.74	15.80
114	NYSE	NAT	Wed, Mar 25, 1998	15.86	15.86	15.74	15.86
113	NYSE	NAT	Mon, Mar 23, 1998	15.86	15.86	15.86	15.86
112	NYSE	NAT	Fri, Mar 20, 1998	15.86	15.86	15.86	15.86
111	NYSE	NAT	Thu, Mar 19, 1998	15.86	15.86	15.74	15.74
110	NYSE	NAT	Wed, Mar 18, 1998	15.86	15.86	15.86	15.86
109	NYSE	NAT	Tue, Mar 17, 1998	15.86	15.86	15.86	15.86
108	NYSE	NAT	Mon, Mar 16, 1998	15.86	15.86	15.86	15.86
107	NYSE	NAT	Fri, Mar 13, 1998	15.86	15.86	15.86	15.86
106	NYSE	NAT	Thu, Mar 12, 1998	15.86	15.86	15.86	15.86
105	NYSE	NAT	Tue, Mar 10, 1998	15.49	15.74	15.49	15.74
104	NYSE	NAT	Mon, Mar 9, 1998	15.49	15.49	15.49	15.49
103	NYSE	NAT	Tue, Mar 3, 1998	15.49	15.49	15.49	15.49
102	NYSE	NAT	Mon, Mar 2, 1998	15.36	15.36	15.36	15.36
101	NYSE	NAT	Fri, Feb 27, 1998	15.49	15.49	15.49	15.49
100	NYSE	NAT	Thu, Feb 26, 1998	15.49	15.49	15.49	15.49
99	NYSE	NAT	Wed, Feb 25, 1998	15.24	15.36	15.24	15.36
98	NYSE	NAT	Tue, Feb 24, 1998	15.12	15.12	15.12	15.12
97	NYSE	NAT	Mon, Feb 23, 1998	14.99	14.99	14.99	14.99
96	NYSE	NAT	Fri, Feb 20, 1998	15.12	15.24	14.99	15.24
95	NYSE	NAT	Thu, Feb 19, 1998	14.74	14.99	14.74	14.99
94	NYSE	NAT	Wed, Feb 18, 1998	15.12	15.12	14.99	14.99
93	NYSE	NAT	Tue, Feb 17, 1998	15.36	15.36	14.87	14.87
92	NYSE	NAT	Fri, Feb 13, 1998	15.43	15.43	15.43	15.43
91	NYSE	NAT	Thu, Feb 12, 1998	15.36	15.36	15.36	15.36
90	NYSE	NAT	Wed, Feb 11, 1998	15.43	15.43	15.36	15.36
89	NYSE	NAT	Tue, Feb 10, 1998	15.36	15.36	15.36	15.36
88	NYSE	NAT	Mon, Feb 9, 1998	15.98	16.35	15.49	15.61
87	NYSE	NAT	Thu, Feb 5, 1998	15.74	15.74	15.74	15.74
86	NYSE	NAT	Wed, Feb 4, 1998	15.36	15.61	15.36	15.61
85	NYSE	NAT	Tue, Feb 3, 1998	15.36	15.36	15.12	15.24
84	NYSE	NAT	Mon, Feb 2, 1998	15.36	15.36	15.36	15.36
83	NYSE	NAT	Fri, Jan 30, 1998	15.43	15.43	15.24	15.36
82	NYSE	NAT	Thu, Jan 29, 1998	15.55	15.55	15.55	15.55
81	NYSE	NAT	Wed, Jan 28, 1998	15.55	15.55	15.55	15.55
80	NYSE	NAT	Tue, Jan 27, 1998	15.49	15.55	15.36	15.55
79	NYSE	NAT	Mon, Jan 26, 1998	15.61	15.61	15.61	15.61
78	NYSE	NAT	Fri, Jan 23, 1998	15.61	15.74	15.61	15.61
77	NYSE	NAT	Thu, Jan 22, 1998	15.86	15.86	15.86	15.86
76	NYSE	NAT	Wed, Jan 21, 1998	15.86	15.86	15.86	15.86
75	NYSE	NAT	Tue, Jan 20, 1998	15.98	15.98	15.98	15.98
74	NYSE	NAT	Fri, Jan 16, 1998	15.86	15.98	15.86	15.86
73	NYSE	NAT	Thu, Jan 15, 1998	15.98	15.98	15.86	15.86
72	NYSE	NAT	Wed, Jan 14, 1998	15.74	15.86	15.74	15.86
71	NYSE	NAT	Tue, Jan 13, 1998	15.86	15.86	15.74	15.80
70	NYSE	NAT	Mon, Jan 12, 1998	16.29	16.29	16.11	16.11
69	NYSE	NAT	Fri, Jan 9, 1998	16.29	16.29	16.23	16.23
68	NYSE	NAT	Thu, Jan 8, 1998	16.05	16.29	16.05	16.29
67	NYSE	NAT	Wed, Jan 7, 1998	16.29	16.29	16.29	16.29
66	NYSE	NAT	Tue, Jan 6, 1998	16.35	16.35	16.23	16.23
65	NYSE	NAT	Mon, Jan 5, 1998	16.35	16.35	16.35	16.35
64	NYSE	NAT	Fri, Jan 2, 1998	16.35	16.35	16.35	16.35
63	NYSE	NAT	Wed, Dec 31, 1997	16.23	16.35	16.17	16.35
62	NYSE	NAT	Tue, Dec 30, 1997	16.29	16.29	16.29	16.29
61	NYSE	NAT	Mon, Dec 29, 1997	16.48	16.48	16.23	16.23
60	NYSE	NAT	Fri, Dec 26, 1997	16.35	16.35	16.35	16.35
59	NYSE	NAT	Tue, Dec 23, 1997	16.35	16.35	16.35	16.35
58	NYSE	NAT	Mon, Dec 22, 1997	16.48	16.60	16.23	16.60
57	NYSE	NAT	Fri, Dec 19, 1997	16.73	16.73	16.48	16.48
56	NYSE	NAT	Thu, Dec 18, 1997	16.73	16.73	16.73	16.73
55	NYSE	NAT	Wed, Dec 17, 1997	16.60	16.66	16.60	16.66
54	NYSE	NAT	Tue, Dec 16, 1997	16.85	16.85	16.85	16.85
53	NYSE	NAT	Mon, Dec 15, 1997	16.73	16.85	16.73	16.85
52	NYSE	NAT	Fri, Dec 12, 1997	16.60	16.60	16.60	16.60
51	NYSE	NAT	Thu, Dec 11, 1997	17.47	17.47	16.60	16.60
50	NYSE	NAT	Wed, Dec 10, 1997	17.59	17.59	17.59	17.59
49	NYSE	NAT	Tue, Dec 9, 1997	17.53	17.53	17.53	17.53
48	NYSE	NAT	Mon, Dec 8, 1997	17.47	17.59	17.47	17.47
47	NYSE	NAT	Fri, Dec 5, 1997	17.35	17.47	17.35	17.47
46	NYSE	NAT	Thu, Dec 4, 1997	17.35	17.47	17.35	17.47
45	NYSE	NAT	Wed, Dec 3, 1997	17.22	17.22	17.22	17.22
44	NYSE	NAT	Tue, Dec 2, 1997	17.35	17.35	17.35	17.35
43	NYSE	NAT	Mon, Dec 1, 1997	17.35	17.35	17.35	17.35
42	NYSE	NAT	Fri, Nov 28, 1997	17.22	17.35	17.22	17.35
41	NYSE	NAT	Wed, Nov 26, 1997	17.10	17.35	17.10	17.35
40	NYSE	NAT	Tue, Nov 25, 1997	17.22	17.35	17.22	17.35
39	NYSE	NAT	Mon, Nov 24, 1997	17.35	17.41	17.28	17.35
38	NYSE	NAT	Fri, Nov 21, 1997	17.47	17.47	17.47	17.47
37	NYSE	NAT	Thu, Nov 20, 1997	17.35	17.47	17.35	17.47
36	NYSE	NAT	Wed, Nov 19, 1997	17.22	17.35	17.22	17.35
35	NYSE	NAT	Tue, Nov 18, 1997	17.28	17.35	17.28	17.35
34	NYSE	NAT	Mon, Nov 17, 1997	17.35	17.35	17.35	17.35
33	NYSE	NAT	Fri, Nov 14, 1997	17.35	17.35	17.35	17.35
32	NYSE	NAT	Thu, Nov 13, 1997	17.22	17.35	17.22	17.35
31	NYSE	NAT	Wed, Nov 12, 1997	17.35	17.35	17.35	17.35
30	NYSE	NAT	Tue, Nov 11, 1997	17.47	17.47	17.47	17.47
29	NYSE	NAT	Mon, Nov 10, 1997	17.35	17.47	17.35	17.47
28	NYSE	NAT	Fri, Nov 7, 1997	17.47	17.47	17.47	17.47
27	NYSE	NAT	Thu, Nov 6, 1997	17.53	17.53	17.47	17.47
26	NYSE	NAT	Wed, Nov 5, 1997	17.47	17.53	17.47	17.47
25	NYSE	NAT	Tue, Nov 4, 1997	17.41	17.47	17.41	17.47
24	NYSE	NAT	Mon, Nov 3, 1997	17.35	17.41	17.35	17.41
23	NYSE	NAT	Fri, Oct 31, 1997	17.35	17.35	17.22	17.22
22	NYSE	NAT	Thu, Oct 30, 1997	17.66	17.66	17.35	17.35
21	NYSE	NAT	Wed, Oct 29, 1997	17.78	17.78	17.78	17.78
20	NYSE	NAT	Tue, Oct 28, 1997	17.97	17.97	17.47	17.78
19	NYSE	NAT	Mon, Oct 27, 1997	18.21	18.21	17.97	18.09
18	NYSE	NAT	Fri, Oct 24, 1997	18.28	18.34	18.28	18.34
17	NYSE	NAT	Thu, Oct 23, 1997	18.46	18.46	18.21	18.21
16	NYSE	NAT	Wed, Oct 22, 1997	18.71	18.71	18.59	18.71
15	NYSE	NAT	Tue, Oct 21, 1997	18.83	18.83	18.71	18.71
14	NYSE	NAT	Mon, Oct 20, 1997	18.96	19.02	18.71	18.83
13	NYSE	NAT	Fri, Oct 17, 1997	18.96	19.02	18.89	18.89
12	NYSE	NAT	Thu, Oct 16, 1997	18.89	19.20	18.83	18.96
11	NYSE	NAT	Wed, Oct 15, 1997	18.40	19.20	18.40	18.96
10	NYSE	NAT	Tue, Oct 14, 1997	18.09	18.34	18.09	18.34
9	NYSE	NAT	Mon, Oct 13, 1997	18.21	18.21	18.21	18.21
8	NYSE	NAT	Fri, Oct 10, 1997	18.09	18.21	18.09	18.09
7	NYSE	NAT	Thu, Oct 9, 1997	17.84	18.46	17.84	18.21
6	NYSE	NAT	Wed, Oct 8, 1997	18.09	18.09	18.09	18.09
5	NYSE	NAT	Mon, Oct 6, 1997	18.21	18.21	18.21	18.21
4	NYSE	NAT	Fri, Oct 3, 1997	18.46	18.46	18.34	18.34
3	NYSE	NAT	Thu, Oct 2, 1997	18.46	18.59	18.46	18.59
2	NYSE	NAT	Wed, Oct 1, 1997	18.34	18.46	18.21	18.46
1	NYSE	NAT	Tue, Sep 30, 1997	17.84	18.59	17.84	18.59
#	Exchange	Symbol	Date	Open	High	Low	Close

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