NATI: Historical Prices for National Instruments Corporatio

Date	Open	High	Low	Close	Volume	Adj Close*
17-Dec-09	29.18	29.28	28.78	29.02	127,800	29.02
16-Dec-09	29.67	29.80	29.38	29.47	130,100	29.47
15-Dec-09	29.23	29.63	29.23	29.63	195,600	29.63
14-Dec-09	29.27	29.49	29.04	29.47	96,100	29.47
11-Dec-09	29.21	29.52	28.89	29.19	84,000	29.19
10-Dec-09	29.10	29.43	28.82	28.97	134,400	28.97
9-Dec-09	28.98	29.09	28.69	28.88	118,800	28.88
8-Dec-09	29.10	29.15	28.57	28.98	171,100	28.98
7-Dec-09	29.52	29.65	29.16	29.30	179,300	29.30
4-Dec-09	29.05	29.58	29.04	29.49	136,200	29.49
3-Dec-09	29.02	29.15	28.79	28.79	145,700	28.79
2-Dec-09	28.85	29.15	28.76	28.89	345,600	28.89
1-Dec-09	28.57	28.95	28.50	28.81	282,300	28.81
30-Nov-09	28.32	28.61	28.00	28.53	373,100	28.53
27-Nov-09	27.89	28.53	27.85	28.32	135,000	28.32
25-Nov-09	28.76	28.87	28.68	28.70	221,600	28.70
24-Nov-09	28.62	28.74	28.34	28.62	210,400	28.62
23-Nov-09	28.36	29.00	28.36	28.71	283,000	28.71
20-Nov-09	28.03	28.36	27.95	28.28	183,700	28.28
19-Nov-09	28.43	28.43	27.91	28.30	198,500	28.30
18-Nov-09	28.70	28.73	28.38	28.63	190,400	28.63
17-Nov-09	28.40	28.90	28.40	28.86	211,200	28.86
16-Nov-09	28.13	28.64	28.12	28.59	198,200	28.59
13-Nov-09	27.96	28.33	27.95	28.20	158,900	28.20
12-Nov-09	28.20	28.47	27.92	27.95	186,800	27.95
11-Nov-09	28.15	28.37	28.05	28.29	189,500	28.29
10-Nov-09	27.67	28.34	27.31	28.24	581,800	28.24
9-Nov-09	27.27	27.97	27.02	27.88	223,500	27.88
6-Nov-09	27.07	27.42	26.81	27.15	158,100	27.15
5-Nov-09	26.74	27.29	26.67	27.22	265,100	27.22
5-Nov-09	$ 0.12 Dividend
4-Nov-09	26.94	27.04	26.60	26.64	193,600	26.52
3-Nov-09	26.52	27.07	26.38	27.07	277,100	26.95
2-Nov-09	26.71	26.99	26.25	26.64	276,900	26.52
30-Oct-09	27.41	27.48	26.53	26.70	243,200	26.58
29-Oct-09	27.04	27.84	27.01	27.61	420,700	27.49
28-Oct-09	28.24	28.39	27.04	27.04	1,482,600	26.92
27-Oct-09	26.87	27.28	26.41	26.69	243,400	26.57
26-Oct-09	26.93	27.41	26.72	26.87	193,900	26.75
23-Oct-09	27.25	27.46	26.91	27.00	276,800	26.88
22-Oct-09	27.20	27.28	26.76	27.18	230,200	27.06
21-Oct-09	27.37	27.87	27.08	27.08	372,000	26.96
20-Oct-09	27.76	27.96	27.26	27.50	251,900	27.38
19-Oct-09	27.62	27.83	27.42	27.75	317,800	27.63
16-Oct-09	27.80	27.97	27.32	27.67	285,100	27.55
15-Oct-09	27.91	28.01	27.73	27.86	335,100	27.73
14-Oct-09	28.15	28.21	27.74	28.00	569,000	27.87
13-Oct-09	28.02	28.13	27.73	27.81	148,900	27.68
12-Oct-09	27.90	28.12	27.90	28.01	246,300	27.88
9-Oct-09	27.44	27.94	27.17	27.84	701,400	27.71
8-Oct-09	27.26	27.66	27.10	27.54	356,300	27.42
7-Oct-09	27.24	27.25	26.90	27.17	166,100	27.05
6-Oct-09	27.08	27.33	26.90	27.22	335,500	27.10
5-Oct-09	26.81	27.18	26.61	26.95	208,300	26.83
2-Oct-09	26.97	27.22	26.73	26.80	173,400	26.68
1-Oct-09	27.45	27.80	27.00	27.11	381,100	26.99
30-Sep-09	27.59	27.81	27.13	27.63	330,100	27.51
29-Sep-09	28.06	28.21	27.48	27.48	309,800	27.36
28-Sep-09	27.30	28.02	27.00	27.94	188,400	27.81
25-Sep-09	27.36	27.45	27.11	27.27	119,600	27.15
24-Sep-09	27.81	28.00	27.34	27.38	188,200	27.26
23-Sep-09	28.17	28.28	27.70	27.80	227,200	27.67
22-Sep-09	28.50	28.70	27.98	28.03	457,400	27.90
21-Sep-09	28.31	28.55	28.25	28.44	266,400	28.31
18-Sep-09	28.41	28.90	28.30	28.55	415,100	28.42
17-Sep-09	28.14	28.50	28.04	28.41	137,200	28.28
16-Sep-09	28.15	28.32	27.93	28.27	229,300	28.14
* Close price adjusted for dividends and splits.

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