No index for last month

date	open SAN	close SAN	high SAN	low SAN	volume SAN
Jan 03, 2012	57.24	57.29	57.42	56.00	3 560 170
Jan 04, 2012	56.59	56.21	57.29	56.18	2 718 500
Jan 05, 2012	55.20	55.50	55.85	54.89	3 460 990
Jan 06, 2012	55.76	56.25	56.50	55.60	2 578 340
Jan 09, 2012	56.47	55.79	56.55	55.68	2 193 410
Jan 10, 2012	56.39	56.75	57.07	56.34	3 922 620
Jan 11, 2012	56.68	56.47	57.07	55.98	3 259 820
Jan 12, 2012	56.28	55.88	56.74	55.55	3 145 700
Jan 13, 2012	55.60	55.62	56.20	55.27	2 860 870
Jan 16, 2012	55.39	55.96	56.08	55.15	1
Jan 17, 2012	56.24	56.44	56.44	55.78	2 840 280
Jan 18, 2012	56.42	56.48	57.13	55.96	3 504 290
Jan 19, 2012	56.69	55.97	56.75	55.74	3 310 900
Jan 20, 2012	56.15	55.52	56.15	55.52	4 631 310
Jan 23, 2012	55.50	55.44	55.78	55.19	2 097 220
Jan 24, 2012	55.38	55.75	55.89	55.38	2 897 670
Jan 25, 2012	55.98	55.69	56.11	55.43	2 591 700
Jan 26, 2012	55.82	56.41	56.41	55.78	2 873 900
Jan 27, 2012	56.46	55.83	56.74	55.83	2 993 120
Jan 30, 2012	55.61	56.19	56.64	55.55	3 556 330
Jan 31, 2012	56.30	56.47	57.27	56.30	3 860 780
Feb 01, 2012	56.41	56.35	56.91	55.63	4 228 560
Feb 02, 2012	56.22	55.79	56.57	55.69	2 784 850