| Date | Open | High | Low | Close | Volume | Change (%) |
|---|---|---|---|---|---|---|
| Feb 29, 2008 | 21.10 | 21.16 | 20.73 | 20.80 | 4,671,780 | -0.49(-2.30%) |
| Feb 28, 2008 | 21.31 | 21.60 | 21.12 | 21.29 | 3,508,244 | -0.34(-1.57%) |
| Feb 27, 2008 | 21.42 | 21.90 | 21.34 | 21.63 | 4,530,127 | +0.04(+0.19%) |
| Feb 26, 2008 | 21.79 | 21.85 | 21.43 | 21.59 | 8,696,317 | -0.26(-1.19%) |
| Feb 25, 2008 | 21.53 | 21.92 | 21.32 | 21.85 | 4,665,885 | +0.41(+1.91%) |
| Feb 22, 2008 | 21.03 | 21.52 | 20.81 | 21.44 | 4,290,178 | +0.45(+2.14%) |
| Feb 21, 2008 | 21.41 | 21.41 | 20.84 | 20.99 | 3,023,700 | -0.30(-1.41%) |
| Feb 20, 2008 | 21.17 | 21.43 | 20.85 | 21.29 | 4,341,112 | -0.11(-0.51%) |
| Feb 19, 2008 | 21.58 | 21.98 | 21.28 | 21.40 | 6,502,267 | +0.03(+0.14%) |
| Feb 18, 2008 | 21.04 | 21.42 | 20.79 | 21.37 | 0 | +0.00(+0.00%) |
| Feb 15, 2008 | 21.04 | 21.42 | 20.79 | 21.37 | 5,022,208 | +0.28(+1.33%) |
| Feb 14, 2008 | 21.83 | 21.94 | 21.06 | 21.09 | 4,267,510 | -0.74(-3.39%) |
| Feb 13, 2008 | 21.67 | 22.09 | 21.45 | 21.83 | 5,530,500 | +0.29(+1.35%) |
| Feb 12, 2008 | 22.06 | 22.35 | 21.52 | 21.54 | 4,673,757 | -0.42(-1.91%) |
| Feb 11, 2008 | 21.73 | 22.15 | 21.64 | 21.96 | 2,737,040 | +0.29(+1.34%) |
| Feb 08, 2008 | 21.58 | 21.88 | 21.49 | 21.67 | 4,655,516 | -0.11(-0.51%) |
| Feb 07, 2008 | 21.87 | 22.21 | 21.43 | 21.78 | 5,109,050 | -0.25(-1.13%) |
| Feb 06, 2008 | 21.95 | 22.65 | 21.87 | 22.03 | 3,189,264 | +0.22(+1.01%) |
| Feb 05, 2008 | 22.33 | 22.50 | 21.77 | 21.81 | 4,508,020 | -0.78(-3.45%) |
| Feb 04, 2008 | 22.95 | 22.95 | 22.48 | 22.59 | 4,488,428 | -0.45(-1.95%) |
| Feb 01, 2008 | 22.64 | 23.17 | 22.13 | 23.04 | 4,515,593 | +0.64(+2.86%) |
| Jan 31, 2008 | 20.89 | 22.75 | 20.20 | 22.40 | 9,983,054 | +1.54(+7.38%) |
| Jan 30, 2008 | 20.44 | 21.48 | 20.44 | 20.86 | 4,741,047 | -0.06(-0.29%) |
| Jan 29, 2008 | 20.92 | 21.16 | 20.56 | 20.92 | 3,928,581 | -0.11(-0.52%) |
| Jan 28, 2008 | 20.50 | 21.08 | 20.00 | 21.03 | 4,001,252 | +0.56(+2.74%) |
| Jan 25, 2008 | 20.97 | 21.20 | 20.16 | 20.47 | 3,935,607 | -0.34(-1.63%) |
| Jan 24, 2008 | 19.90 | 21.02 | 19.73 | 20.81 | 9,144,466 | +1.06(+5.37%) |
| Jan 23, 2008 | 19.16 | 20.31 | 19.16 | 19.75 | 8,009,918 | -0.26(-1.30%) |
| Jan 22, 2008 | 18.56 | 20.63 | 18.56 | 20.01 | 6,920,795 | -1.03(-4.90%) |
| Jan 21, 2008 | 21.37 | 21.61 | 20.94 | 21.04 | 0 | +0.00(+0.00%) |
| Jan 18, 2008 | 21.37 | 21.61 | 20.94 | 21.04 | 7,347,894 | -0.18(-0.85%) |
| Jan 17, 2008 | 22.00 | 22.36 | 21.15 | 21.22 | 6,568,764 | -0.65(-2.97%) |
| Jan 16, 2008 | 21.28 | 22.31 | 21.28 | 21.87 | 6,215,900 | +0.45(+2.10%) |
| Jan 15, 2008 | 20.48 | 21.99 | 20.48 | 21.42 | 6,240,940 | -0.26(-1.20%) |
| Jan 14, 2008 | 21.47 | 21.89 | 21.25 | 21.68 | 5,471,076 | +0.34(+1.59%) |
| Jan 11, 2008 | 22.06 | 22.29 | 21.12 | 21.34 | 5,114,347 | -0.96(-4.30%) |
| Jan 10, 2008 | 22.23 | 22.54 | 21.56 | 22.30 | 3,840,627 | -0.05(-0.22%) |
| Jan 09, 2008 | 21.35 | 22.42 | 21.24 | 22.35 | 5,090,761 | +0.98(+4.59%) |
| Jan 08, 2008 | 22.01 | 22.33 | 21.26 | 21.37 | 4,462,472 | -0.49(-2.24%) |
| Jan 07, 2008 | 22.03 | 22.48 | 21.64 | 21.86 | 5,219,054 | -0.08(-0.36%) |
| Jan 04, 2008 | 23.08 | 23.11 | 21.69 | 21.94 | 7,163,319 | -1.31(-5.63%) |
| Jan 03, 2008 | 23.06 | 23.37 | 22.94 | 23.25 | 2,989,660 | +0.22(+0.96%) |
| Jan 02, 2008 | 24.31 | 24.31 | 22.69 | 23.03 | 5,559,089 | -1.25(-5.15%) |
| Jan 01, 2008 | 23.90 | 24.57 | 23.87 | 24.28 | 2,231,279 | +0.00(+0.00%) |
| Dec 31, 2007 | 23.90 | 24.57 | 23.87 | 24.28 | 2,231,279 | +0.33(+1.38%) |
| Dec 28, 2007 | 24.21 | 24.53 | 23.86 | 23.95 | 2,444,784 | -0.04(-0.17%) |
| Dec 27, 2007 | 24.64 | 24.83 | 23.97 | 23.99 | 2,803,044 | -0.73(-2.95%) |
| Dec 26, 2007 | 24.37 | 24.81 | 23.99 | 24.72 | 2,761,238 | +0.39(+1.60%) |
| Dec 24, 2007 | 23.81 | 24.38 | 23.34 | 24.33 | 1,489,346 | +0.23(+0.95%) |
| Dec 21, 2007 | 23.70 | 24.14 | 23.46 | 24.10 | 6,328,649 | +0.48(+2.03%) |
| Dec 20, 2007 | 23.65 | 23.73 | 23.23 | 23.62 | 3,884,979 | +0.09(+0.38%) |
| Dec 19, 2007 | 22.92 | 23.65 | 22.74 | 23.53 | 4,047,474 | +0.57(+2.48%) |
| Dec 18, 2007 | 23.18 | 23.33 | 22.41 | 22.96 | 3,809,100 | -0.01(-0.04%) |
| Dec 17, 2007 | 23.51 | 23.54 | 22.95 | 22.97 | 4,264,794 | -0.69(-2.92%) |
| Dec 14, 2007 | 23.14 | 23.99 | 23.05 | 23.66 | 4,931,636 | +0.27(+1.15%) |
| Dec 13, 2007 | 23.13 | 23.77 | 23.01 | 23.39 | 2,686,443 | +0.12(+0.52%) |
| Dec 12, 2007 | 23.41 | 23.67 | 22.83 | 23.27 | 3,387,570 | +0.17(+0.74%) |
| Dec 11, 2007 | 23.73 | 23.97 | 23.01 | 23.10 | 5,563,636 | -0.58(-2.45%) |
| Dec 10, 2007 | 22.82 | 23.75 | 22.82 | 23.68 | 6,395,174 | +0.97(+4.27%) |
| Dec 07, 2007 | 22.79 | 22.98 | 22.62 | 22.71 | 2,675,531 | -0.08(-0.35%) |
| Dec 06, 2007 | 22.95 | 22.96 | 22.54 | 22.79 | 3,578,825 | -0.17(-0.74%) |
| Dec 05, 2007 | 23.10 | 23.25 | 22.66 | 22.96 | 5,594,855 | +0.03(+0.13%) |
| Dec 04, 2007 | 22.94 | 23.25 | 22.86 | 22.93 | 5,096,060 | -0.19(-0.82%) |