| Date | Open | High | Low | Close | Volume | Change (%) |
|---|---|---|---|---|---|---|
| Dec 31, 2012 | 24.25 | 25.55 | 24.25 | 25.32 | 1,194,250 | +1.02(+4.20%) |
| Dec 28, 2012 | 24.39 | 24.60 | 24.25 | 24.30 | 494,042 | -0.28(-1.14%) |
| Dec 27, 2012 | 24.61 | 24.80 | 24.21 | 24.58 | 563,130 | -0.06(-0.24%) |
| Dec 26, 2012 | 24.84 | 24.91 | 24.61 | 24.64 | 480,048 | -0.09(-0.36%) |
| Dec 24, 2012 | 25.08 | 25.30 | 24.58 | 24.73 | 328,003 | -0.49(-1.94%) |
| Dec 21, 2012 | 24.90 | 25.44 | 24.65 | 25.22 | 1,654,317 | -0.18(-0.71%) |
| Dec 20, 2012 | 24.84 | 25.44 | 24.38 | 25.40 | 1,457,520 | +0.55(+2.21%) |
| Dec 19, 2012 | 25.16 | 25.16 | 24.61 | 24.85 | 508,474 | -0.22(-0.88%) |
| Dec 18, 2012 | 24.97 | 25.09 | 24.85 | 25.07 | 984,334 | +0.17(+0.68%) |
| Dec 17, 2012 | 24.22 | 25.02 | 24.17 | 24.90 | 1,091,885 | +0.70(+2.89%) |
| Dec 14, 2012 | 24.50 | 24.62 | 24.14 | 24.20 | 1,760,443 | -0.31(-1.26%) |
| Dec 13, 2012 | 24.89 | 25.00 | 24.44 | 24.51 | 1,251,648 | -0.74(-2.93%) |
| Dec 12, 2012 | 25.90 | 26.11 | 25.20 | 25.25 | 540,248 | -0.47(-1.83%) |
| Dec 11, 2012 | 24.69 | 25.79 | 24.54 | 25.72 | 1,625,403 | +1.13(+4.60%) |
| Dec 10, 2012 | 24.44 | 24.79 | 24.26 | 24.59 | 884,484 | -0.16(-0.65%) |
| Dec 07, 2012 | 24.81 | 25.06 | 24.57 | 24.75 | 1,338,681 | -0.02(-0.08%) |
| Dec 06, 2012 | 24.77 | 24.91 | 24.66 | 24.77 | 633,800 | -0.07(-0.28%) |
| Dec 05, 2012 | 25.07 | 25.13 | 24.65 | 24.84 | 699,570 | -0.11(-0.44%) |
| Dec 04, 2012 | 25.14 | 25.14 | 24.69 | 24.95 | 762,805 | -0.61(-2.39%) |
| Nov 30, 2012 | 25.51 | 25.58 | 25.03 | 25.56 | 764,764 | +0.00(+0.00%) |
| Nov 29, 2012 | 24.91 | 25.75 | 24.91 | 25.56 | 1,631,909 | +0.70(+2.82%) |
| Nov 28, 2012 | 24.70 | 24.99 | 24.35 | 24.86 | 1,272,615 | -0.04(-0.16%) |
| Nov 27, 2012 | 24.48 | 25.08 | 24.39 | 24.90 | 1,594,212 | +0.44(+1.80%) |
| Nov 26, 2012 | 24.53 | 24.62 | 24.23 | 24.46 | 1,039,691 | -0.29(-1.17%) |
| Nov 24, 2012 | 24.85 | 24.87 | 24.58 | 24.75 | 658,395 | +0.00(+0.00%) |
| Nov 23, 2012 | 24.85 | 24.87 | 24.58 | 24.75 | 658,395 | -0.01(-0.04%) |
| Nov 21, 2012 | 24.99 | 25.15 | 24.71 | 24.76 | 1,468,636 | -0.22(-0.88%) |
| Nov 20, 2012 | 24.71 | 25.05 | 24.09 | 24.98 | 3,608,781 | +0.24(+0.97%) |
| Nov 19, 2012 | 23.83 | 24.90 | 23.76 | 24.74 | 3,003,151 | +0.82(+3.43%) |
| Nov 16, 2012 | 22.41 | 24.07 | 22.41 | 23.92 | 5,666,734 | +2.34(+10.84%) |
| Nov 15, 2012 | 21.60 | 21.98 | 21.28 | 21.58 | 2,284,469 | -0.02(-0.09%) |
| Nov 14, 2012 | 22.65 | 22.70 | 21.53 | 21.60 | 1,714,284 | -0.99(-4.38%) |
| Nov 13, 2012 | 22.68 | 22.92 | 22.59 | 22.59 | 585,944 | -0.25(-1.09%) |
| Nov 12, 2012 | 22.37 | 23.05 | 22.27 | 22.84 | 856,453 | +0.60(+2.70%) |
| Nov 09, 2012 | 22.14 | 22.71 | 21.90 | 22.24 | 1,660,966 | -0.13(-0.58%) |
| Nov 08, 2012 | 23.22 | 23.32 | 22.35 | 22.37 | 1,099,644 | -0.87(-3.74%) |
| Nov 07, 2012 | 23.93 | 24.90 | 23.15 | 23.24 | 2,367,546 | -0.75(-3.13%) |
| Nov 06, 2012 | 23.80 | 24.10 | 23.58 | 23.99 | 1,048,624 | +0.41(+1.74%) |
| Nov 05, 2012 | 23.22 | 23.85 | 23.22 | 23.58 | 1,037,064 | +0.14(+0.60%) |
| Nov 02, 2012 | 23.74 | 23.75 | 22.69 | 23.44 | 3,534,757 | -0.55(-2.29%) |
| Nov 01, 2012 | 23.54 | 24.28 | 23.21 | 23.99 | 1,337,633 | +0.53(+2.26%) |
| Oct 31, 2012 | 23.49 | 23.61 | 23.04 | 23.46 | 677,914 | -0.05(-0.21%) |
| Oct 26, 2012 | 23.51 | 23.51 | 23.51 | 0 | -0.22(-0.93%) | |
| Oct 25, 2012 | 23.54 | 23.81 | 23.22 | 23.73 | 986,735 | +0.46(+1.98%) |
| Oct 24, 2012 | 23.74 | 23.79 | 23.23 | 23.27 | 1,037,825 | -0.29(-1.23%) |
| Oct 23, 2012 | 23.74 | 23.93 | 23.37 | 23.56 | 1,153,914 | -0.58(-2.40%) |
| Oct 19, 2012 | 24.20 | 24.34 | 23.82 | 24.14 | 1,489,225 | -0.11(-0.45%) |
| Oct 18, 2012 | 24.22 | 24.48 | 23.98 | 24.25 | 1,117,485 | -0.09(-0.37%) |
| Oct 17, 2012 | 25.25 | 25.37 | 24.11 | 24.34 | 1,301,637 | +0.07(+0.29%) |
| Oct 16, 2012 | 24.45 | 24.53 | 24.15 | 24.27 | 539,804 | -0.03(-0.12%) |
| Oct 15, 2012 | 24.19 | 24.34 | 23.86 | 24.30 | 582,195 | +0.14(+0.58%) |
| Oct 12, 2012 | 24.45 | 24.55 | 24.10 | 24.16 | 916,249 | +0.02(+0.08%) |
| Oct 11, 2012 | 24.27 | 24.67 | 24.13 | 24.14 | 1,340,399 | +0.02(+0.08%) |
| Oct 10, 2012 | 24.21 | 24.28 | 23.75 | 24.12 | 1,427,600 | -0.14(-0.58%) |
| Oct 09, 2012 | 24.15 | 24.55 | 24.11 | 24.26 | 1,658,326 | +0.15(+0.62%) |
| Oct 08, 2012 | 24.42 | 24.44 | 24.07 | 24.11 | 1,268,120 | -0.36(-1.47%) |
| Oct 06, 2012 | 24.78 | 24.80 | 24.41 | 24.47 | 1,614,087 | +0.00(+0.00%) |
| Oct 05, 2012 | 24.78 | 24.80 | 24.41 | 24.47 | 1,614,087 | -0.12(-0.49%) |
| Oct 04, 2012 | 24.84 | 24.86 | 24.42 | 24.59 | 2,482,316 | -0.27(-1.09%) |
| Oct 03, 2012 | 24.25 | 25.41 | 23.65 | 24.86 | 5,327,223 | +1.26(+5.34%) |
| Oct 02, 2012 | 23.40 | 23.76 | 23.25 | 23.60 | 1,842,067 | +0.29(+1.24%) |
| Oct 01, 2012 | 23.75 | 24.98 | 23.11 | 23.31 | 998,482 | +0.09(+0.39%) |
| Sep 28, 2012 | 23.18 | 23.37 | 22.91 | 23.22 | 1,253,449 | -0.17(-0.73%) |
| Sep 27, 2012 | 22.10 | 23.57 | 22.02 | 23.39 | 2,621,722 | +1.32(+5.98%) |
| Sep 26, 2012 | 22.88 | 22.88 | 21.89 | 22.07 | 1,272,409 | -0.73(-3.20%) |
| Sep 25, 2012 | 22.40 | 22.83 | 22.32 | 22.80 | 1,957,143 | +0.49(+2.20%) |
| Sep 24, 2012 | 22.30 | 22.49 | 22.17 | 22.31 | 926,360 | -0.16(-0.71%) |
| Sep 21, 2012 | 22.94 | 22.98 | 22.47 | 22.47 | 1,113,338 | -0.27(-1.19%) |
| Sep 20, 2012 | 22.53 | 23.00 | 22.53 | 22.74 | 1,281,162 | -0.03(-0.13%) |
| Sep 19, 2012 | 22.65 | 22.83 | 22.49 | 22.77 | 1,170,759 | +0.17(+0.75%) |
| Sep 18, 2012 | 23.08 | 23.08 | 22.51 | 22.60 | 1,136,969 | -0.51(-2.21%) |
| Sep 17, 2012 | 23.50 | 23.50 | 23.08 | 23.11 | 618,567 | -0.46(-1.95%) |
| Sep 14, 2012 | 23.09 | 23.97 | 23.09 | 23.57 | 1,717,427 | +0.51(+2.21%) |
| Sep 13, 2012 | 22.62 | 23.42 | 22.52 | 23.06 | 1,060,805 | +0.46(+2.04%) |
| Sep 12, 2012 | 22.64 | 22.84 | 22.41 | 22.60 | 600,319 | +0.08(+0.36%) |
| Sep 11, 2012 | 22.53 | 22.95 | 22.48 | 22.52 | 1,072,238 | +0.09(+0.40%) |
| Sep 10, 2012 | 23.19 | 23.24 | 22.38 | 22.43 | 1,741,608 | -0.76(-3.28%) |
| Sep 07, 2012 | 22.90 | 23.54 | 22.66 | 23.19 | 1,987,145 | +0.40(+1.76%) |
| Sep 06, 2012 | 22.93 | 23.20 | 22.73 | 22.79 | 1,251,443 | +0.13(+0.57%) |
| Sep 05, 2012 | 22.43 | 22.97 | 22.37 | 22.66 | 1,350,761 | +0.22(+0.98%) |
| Sep 04, 2012 | 21.70 | 22.61 | 21.55 | 22.44 | 1,636,241 | +0.71(+3.27%) |
| Aug 31, 2012 | 21.94 | 21.95 | 21.61 | 21.73 | 432,471 | +0.00(+0.00%) |
| Aug 30, 2012 | 21.70 | 21.97 | 21.48 | 21.73 | 600,534 | -0.20(-0.91%) |
| Aug 29, 2012 | 21.78 | 22.04 | 21.75 | 21.93 | 1,014,263 | -0.06(-0.27%) |
| Aug 27, 2012 | 21.79 | 22.06 | 21.65 | 21.99 | 998,531 | +0.28(+1.29%) |
| Aug 24, 2012 | 21.55 | 21.93 | 21.50 | 21.71 | 1,090,453 | -0.02(-0.09%) |
| Aug 23, 2012 | 22.16 | 22.45 | 21.47 | 21.73 | 1,796,299 | -0.35(-1.59%) |
| Aug 22, 2012 | 21.59 | 22.23 | 21.07 | 22.08 | 6,596,521 | +2.17(+10.90%) |
| Aug 21, 2012 | 19.86 | 20.49 | 19.83 | 19.91 | 2,272,639 | +0.05(+0.25%) |
| Aug 20, 2012 | 19.72 | 19.92 | 19.51 | 19.86 | 1,103,724 | +0.13(+0.66%) |
| Aug 17, 2012 | 18.78 | 20.08 | 18.74 | 19.73 | 2,651,584 | +1.00(+5.34%) |
| Aug 16, 2012 | 18.57 | 18.80 | 18.45 | 18.73 | 1,146,430 | +0.17(+0.92%) |
| Aug 15, 2012 | 18.54 | 18.78 | 18.52 | 18.56 | 651,516 | -0.07(-0.38%) |
| Aug 14, 2012 | 18.69 | 18.81 | 18.46 | 18.63 | 618,116 | +0.05(+0.27%) |
| Aug 13, 2012 | 18.62 | 18.74 | 18.43 | 18.58 | 861,346 | -0.18(-0.96%) |
| Aug 11, 2012 | 18.33 | 18.96 | 18.32 | 18.76 | 1,930,095 | +0.00(+0.00%) |
| Aug 10, 2012 | 18.33 | 18.96 | 18.32 | 18.76 | 1,930,095 | +0.29(+1.57%) |
| Aug 09, 2012 | 18.33 | 18.51 | 18.10 | 18.47 | 764,037 | +0.14(+0.76%) |
| Aug 08, 2012 | 18.08 | 18.49 | 18.03 | 18.33 | 964,243 | +0.16(+0.88%) |
| Aug 07, 2012 | 17.27 | 18.50 | 17.15 | 18.17 | 3,121,023 | +1.51(+9.06%) |
| Aug 06, 2012 | 16.86 | 17.08 | 16.64 | 16.66 | 840,500 | -0.09(-0.54%) |
| Aug 03, 2012 | 16.40 | 17.21 | 16.37 | 16.75 | 1,300,991 | +0.72(+4.49%) |
| Aug 02, 2012 | 15.97 | 16.11 | 15.65 | 16.03 | 1,015,732 | -0.16(-0.99%) |
| Aug 01, 2012 | 16.64 | 16.69 | 16.00 | 16.19 | 1,454,537 | -0.27(-1.64%) |
| Jul 31, 2012 | 16.48 | 16.78 | 16.35 | 16.46 | 740,298 | -0.10(-0.60%) |
| Jul 30, 2012 | 16.59 | 16.69 | 16.40 | 16.56 | 588,092 | -0.01(-0.06%) |
| Jul 27, 2012 | 16.25 | 16.74 | 16.07 | 16.57 | 984,344 | +0.51(+3.18%) |
| Jul 26, 2012 | 16.52 | 16.60 | 16.02 | 16.06 | 1,021,618 | -0.14(-0.86%) |
| Jul 25, 2012 | 16.38 | 16.51 | 16.17 | 16.20 | 591,935 | -0.20(-1.22%) |
| Jul 24, 2012 | 16.56 | 16.64 | 16.27 | 16.40 | 1,100,601 | -0.15(-0.91%) |
| Jul 23, 2012 | 16.61 | 16.75 | 16.26 | 16.55 | 1,213,336 | -0.49(-2.88%) |
| Jul 20, 2012 | 17.20 | 17.41 | 16.99 | 17.04 | 768,447 | -0.36(-2.07%) |
| Jul 19, 2012 | 17.35 | 17.53 | 17.05 | 17.40 | 1,235,687 | +0.13(+0.75%) |
| Jul 18, 2012 | 16.88 | 17.33 | 16.86 | 17.27 | 940,141 | +0.31(+1.83%) |
| Jul 17, 2012 | 17.00 | 17.15 | 16.67 | 16.96 | 869,615 | +0.08(+0.47%) |
| Jul 16, 2012 | 16.54 | 16.92 | 16.30 | 16.88 | 836,676 | +0.23(+1.38%) |
| Jul 14, 2012 | 15.94 | 16.73 | 15.94 | 16.65 | 4,298,132 | +0.00(+0.00%) |
| Jul 13, 2012 | 15.94 | 16.73 | 15.94 | 16.65 | 4,298,132 | +0.75(+4.72%) |
| Jul 12, 2012 | 15.84 | 16.07 | 15.62 | 15.90 | 1,151,566 | -0.08(-0.50%) |
| Jul 11, 2012 | 16.31 | 16.39 | 15.78 | 15.98 | 1,641,629 | -0.34(-2.08%) |
| Jul 10, 2012 | 17.22 | 17.28 | 16.24 | 16.32 | 1,575,374 | -0.74(-4.34%) |
| Jul 09, 2012 | 17.16 | 17.30 | 16.89 | 17.06 | 1,630,647 | -0.08(-0.47%) |
| Jul 06, 2012 | 17.40 | 17.49 | 17.10 | 17.14 | 809,583 | -0.43(-2.45%) |
| Jul 05, 2012 | 17.86 | 17.92 | 17.50 | 17.57 | 963,260 | -0.41(-2.28%) |
| Jul 03, 2012 | 17.94 | 17.98 | 17.73 | 17.98 | 721,568 | -0.02(-0.11%) |
| Jul 02, 2012 | 17.82 | 18.00 | 17.50 | 18.00 | 861,401 | +0.26(+1.49%) |
| Jun 30, 2012 | 17.51 | 17.79 | 17.39 | 17.74 | 809,290 | -0.00(-0.03%) |
| Jun 29, 2012 | 17.51 | 17.79 | 17.39 | 17.74 | 894,193 | +0.69(+4.05%) |
| Jun 28, 2012 | 16.58 | 17.14 | 16.58 | 17.05 | 743,148 | +0.32(+1.91%) |
| Jun 27, 2012 | 16.72 | 17.08 | 16.59 | 16.73 | 1,342,107 | +0.02(+0.12%) |
| Jun 26, 2012 | 16.68 | 16.95 | 16.53 | 16.71 | 640,115 | +0.06(+0.36%) |
| Jun 25, 2012 | 16.52 | 16.76 | 16.50 | 16.65 | 652,388 | -0.23(-1.36%) |
| Jun 22, 2012 | 16.98 | 17.02 | 16.59 | 16.88 | 1,930,775 | +0.06(+0.36%) |
| Jun 21, 2012 | 17.47 | 17.56 | 16.70 | 16.82 | 1,035,901 | -0.63(-3.61%) |
| Jun 20, 2012 | 17.15 | 17.50 | 16.97 | 17.45 | 784,094 | +0.26(+1.51%) |
| Jun 19, 2012 | 17.09 | 17.45 | 17.08 | 17.19 | 980,434 | +0.14(+0.82%) |
| Jun 18, 2012 | 16.82 | 17.15 | 16.61 | 17.05 | 720,356 | +0.10(+0.59%) |
| Jun 15, 2012 | 16.68 | 16.98 | 16.58 | 16.95 | 664,749 | +0.35(+2.11%) |
| Jun 14, 2012 | 16.24 | 16.76 | 16.24 | 16.60 | 765,679 | +0.43(+2.66%) |
| Jun 13, 2012 | 16.18 | 16.57 | 16.09 | 16.17 | 711,174 | -0.14(-0.86%) |
| Jun 12, 2012 | 15.87 | 16.42 | 15.70 | 16.31 | 1,332,163 | +0.57(+3.62%) |
| Jun 11, 2012 | 16.31 | 16.32 | 15.71 | 15.74 | 1,238,018 | -0.38(-2.36%) |
| Jun 08, 2012 | 15.83 | 16.13 | 15.62 | 16.12 | 1,497,724 | +0.24(+1.51%) |
| Jun 07, 2012 | 16.33 | 16.44 | 15.85 | 15.88 | 935,769 | -0.18(-1.12%) |
| Jun 06, 2012 | 15.52 | 16.07 | 15.37 | 16.06 | 1,820,350 | +0.76(+4.97%) |
| Jun 05, 2012 | 15.07 | 15.37 | 15.03 | 15.30 | 2,307,765 | +0.11(+0.72%) |
| Jun 04, 2012 | 15.57 | 15.57 | 14.99 | 15.19 | 1,643,949 | -0.30(-1.94%) |
| Jun 02, 2012 | 16.21 | 16.24 | 15.02 | 15.49 | 3,976,287 | +0.00(+0.00%) |
| Jun 01, 2012 | 16.21 | 16.24 | 15.02 | 15.49 | 3,976,287 | -1.00(-6.06%) |
| May 31, 2012 | 16.56 | 16.61 | 16.03 | 16.49 | 1,610,983 | -0.07(-0.42%) |
| May 30, 2012 | 16.77 | 16.81 | 16.36 | 16.56 | 1,053,193 | -0.50(-2.93%) |
| May 29, 2012 | 17.01 | 17.26 | 16.87 | 17.06 | 1,017,142 | +0.19(+1.13%) |
| May 25, 2012 | 16.92 | 17.00 | 16.78 | 16.87 | 1,071,372 | -0.12(-0.71%) |
| May 24, 2012 | 16.90 | 17.11 | 16.68 | 16.99 | 690,753 | +0.18(+1.07%) |
| May 23, 2012 | 16.24 | 16.86 | 16.02 | 16.81 | 1,300,727 | +0.37(+2.25%) |
| May 22, 2012 | 16.61 | 17.08 | 16.36 | 16.44 | 2,100,353 | -0.14(-0.84%) |
| May 21, 2012 | 16.05 | 16.67 | 15.93 | 16.58 | 1,547,171 | +0.56(+3.50%) |
| May 18, 2012 | 16.55 | 16.55 | 15.94 | 16.02 | 1,962,390 | -0.42(-2.55%) |
| May 17, 2012 | 16.81 | 16.89 | 16.41 | 16.44 | 2,570,557 | -0.31(-1.85%) |
| May 16, 2012 | 17.12 | 17.16 | 16.65 | 16.75 | 1,760,919 | -0.23(-1.35%) |
| May 15, 2012 | 17.14 | 17.30 | 16.76 | 16.98 | 1,289,364 | -0.13(-0.76%) |
| May 14, 2012 | 17.21 | 17.43 | 17.01 | 17.11 | 994,224 | -0.33(-1.89%) |
| May 11, 2012 | 17.43 | 17.75 | 17.34 | 17.44 | 1,763,402 | -0.14(-0.80%) |
| May 10, 2012 | 17.73 | 17.77 | 17.31 | 17.58 | 1,008,527 | +0.11(+0.63%) |
| May 09, 2012 | 17.63 | 17.71 | 17.39 | 17.47 | 1,300,195 | -0.49(-2.73%) |
| May 08, 2012 | 17.99 | 18.11 | 17.63 | 17.96 | 1,401,849 | -0.25(-1.37%) |
| May 07, 2012 | 18.27 | 18.54 | 18.18 | 18.21 | 1,113,500 | -0.17(-0.92%) |
| May 04, 2012 | 18.59 | 18.71 | 18.12 | 18.38 | 1,618,796 | -0.23(-1.24%) |
| May 03, 2012 | 19.47 | 19.47 | 17.95 | 18.61 | 5,025,546 | -0.94(-4.81%) |
| May 02, 2012 | 19.22 | 19.76 | 19.16 | 19.55 | 1,223,955 | +0.35(+1.82%) |
| May 01, 2012 | 19.00 | 19.78 | 18.96 | 19.20 | 1,373,139 | +0.19(+1.00%) |
| Apr 30, 2012 | 19.25 | 19.32 | 18.81 | 19.01 | 521,195 | -0.32(-1.66%) |
| Apr 27, 2012 | 19.14 | 19.41 | 18.94 | 19.33 | 988,042 | +0.30(+1.58%) |
| Apr 26, 2012 | 18.90 | 19.24 | 18.73 | 19.03 | 1,013,158 | +0.07(+0.37%) |
| Apr 25, 2012 | 18.61 | 19.00 | 18.59 | 18.96 | 1,084,458 | +0.63(+3.44%) |
| Apr 24, 2012 | 18.20 | 18.48 | 18.11 | 18.33 | 854,253 | +0.15(+0.83%) |
| Apr 23, 2012 | 18.13 | 18.29 | 18.05 | 18.18 | 793,264 | -0.30(-1.62%) |
| Apr 20, 2012 | 18.60 | 18.66 | 18.42 | 18.48 | 791,030 | +0.02(+0.11%) |
| Apr 19, 2012 | 18.55 | 18.84 | 18.29 | 18.46 | 1,266,201 | -0.13(-0.70%) |
| Apr 18, 2012 | 18.56 | 18.79 | 18.43 | 18.59 | 863,790 | -0.17(-0.91%) |
| Apr 17, 2012 | 18.29 | 18.96 | 18.25 | 18.76 | 1,357,734 | +0.68(+3.76%) |
| Apr 16, 2012 | 17.97 | 18.19 | 17.66 | 18.08 | 839,132 | +0.17(+0.95%) |
| Apr 13, 2012 | 18.07 | 18.09 | 17.58 | 17.91 | 505,997 | -0.20(-1.10%) |
| Apr 12, 2012 | 17.57 | 18.33 | 17.50 | 18.11 | 1,549,963 | +0.63(+3.60%) |
| Apr 11, 2012 | 17.63 | 17.70 | 17.32 | 17.48 | 1,341,373 | +0.04(+0.23%) |
| Apr 10, 2012 | 18.16 | 18.39 | 17.39 | 17.44 | 695,533 | -0.70(-3.86%) |
| Apr 09, 2012 | 18.21 | 18.27 | 17.85 | 18.14 | 597,817 | -0.46(-2.47%) |
| Apr 05, 2012 | 18.58 | 18.73 | 18.48 | 18.60 | 386,336 | -0.07(-0.37%) |
| Apr 04, 2012 | 18.78 | 18.87 | 18.49 | 18.67 | 713,613 | -0.41(-2.15%) |
| Apr 03, 2012 | 19.01 | 19.36 | 18.90 | 19.08 | 1,386,437 | +0.11(+0.58%) |
| Apr 02, 2012 | 18.70 | 19.14 | 18.63 | 18.97 | 1,043,851 | +0.25(+1.34%) |
| Mar 30, 2012 | 18.59 | 18.87 | 18.20 | 18.72 | 1,455,011 | +0.38(+2.07%) |
| Mar 29, 2012 | 18.22 | 18.45 | 18.12 | 18.34 | 1,504,585 | -0.07(-0.38%) |
| Mar 28, 2012 | 18.60 | 18.73 | 18.25 | 18.41 | 919,865 | -0.21(-1.13%) |
| Mar 27, 2012 | 19.03 | 19.11 | 18.62 | 18.62 | 563,667 | -0.41(-2.15%) |
| Mar 26, 2012 | 18.32 | 19.04 | 18.32 | 19.03 | 1,113,636 | +0.86(+4.73%) |
| Mar 23, 2012 | 18.20 | 18.31 | 18.05 | 18.17 | 705,790 | -0.06(-0.33%) |
| Mar 22, 2012 | 18.67 | 18.76 | 18.12 | 18.23 | 1,342,680 | -0.64(-3.39%) |
| Mar 21, 2012 | 18.97 | 19.02 | 18.74 | 18.87 | 1,249,948 | -0.05(-0.26%) |
| Mar 20, 2012 | 19.32 | 19.39 | 18.89 | 18.92 | 1,018,763 | -0.58(-2.97%) |
| Mar 19, 2012 | 19.39 | 19.78 | 19.27 | 19.50 | 1,503,641 | +0.03(+0.15%) |
| Mar 16, 2012 | 18.75 | 19.51 | 18.73 | 19.47 | 2,903,758 | +0.76(+4.06%) |
| Mar 15, 2012 | 18.40 | 18.74 | 18.23 | 18.71 | 1,048,245 | +0.30(+1.63%) |
| Mar 14, 2012 | 18.16 | 18.56 | 18.07 | 18.41 | 1,465,814 | +0.22(+1.21%) |
| Mar 13, 2012 | 17.62 | 18.27 | 17.55 | 18.19 | 1,265,398 | +0.72(+4.12%) |
| Mar 12, 2012 | 17.78 | 17.82 | 17.30 | 17.47 | 773,240 | -0.32(-1.80%) |
| Mar 09, 2012 | 17.63 | 18.09 | 17.63 | 17.79 | 919,585 | +0.16(+0.91%) |
| Mar 08, 2012 | 17.55 | 17.90 | 17.37 | 17.63 | 1,043,399 | +0.26(+1.50%) |
| Mar 07, 2012 | 17.32 | 17.58 | 17.24 | 17.37 | 789,797 | +0.14(+0.81%) |
| Mar 06, 2012 | 17.66 | 17.77 | 17.10 | 17.23 | 1,757,117 | -0.70(-3.90%) |
| Mar 05, 2012 | 18.14 | 18.30 | 17.87 | 17.93 | 1,090,497 | -0.29(-1.59%) |
| Mar 02, 2012 | 18.46 | 18.62 | 18.06 | 18.22 | 695,502 | -0.23(-1.25%) |
| Mar 01, 2012 | 18.73 | 18.84 | 18.35 | 18.45 | 1,375,722 | -0.19(-1.02%) |
| Feb 29, 2012 | 18.92 | 18.96 | 18.50 | 18.64 | 1,301,625 | -0.15(-0.80%) |
| Feb 28, 2012 | 18.96 | 19.06 | 18.75 | 18.79 | 3,027,382 | -0.20(-1.05%) |
| Feb 27, 2012 | 18.66 | 19.07 | 18.65 | 18.99 | 1,594,545 | +0.09(+0.48%) |
| Feb 24, 2012 | 19.04 | 19.11 | 18.81 | 18.90 | 758,055 | -0.08(-0.42%) |
| Feb 23, 2012 | 18.62 | 19.25 | 18.60 | 18.98 | 914,513 | +0.39(+2.10%) |
| Feb 22, 2012 | 18.63 | 18.78 | 18.41 | 18.59 | 1,345,459 | +0.01(+0.05%) |
| Feb 21, 2012 | 18.82 | 18.96 | 18.49 | 18.58 | 1,344,101 | -0.22(-1.17%) |
| Feb 17, 2012 | 19.01 | 19.96 | 18.48 | 18.80 | 4,714,714 | -0.27(-1.42%) |
| Feb 16, 2012 | 18.33 | 19.07 | 18.09 | 19.07 | 1,763,211 | +0.67(+3.64%) |
| Feb 15, 2012 | 18.80 | 18.89 | 18.29 | 18.40 | 919,164 | -0.34(-1.81%) |
| Feb 14, 2012 | 18.49 | 18.88 | 18.28 | 18.74 | 2,265,698 | +0.13(+0.70%) |
| Feb 13, 2012 | 18.64 | 18.74 | 18.31 | 18.61 | 2,306,374 | +0.11(+0.59%) |
| Feb 10, 2012 | 18.46 | 18.66 | 18.26 | 18.50 | 723,003 | -0.18(-0.96%) |
| Feb 09, 2012 | 19.16 | 19.35 | 18.65 | 18.68 | 1,696,375 | -0.46(-2.40%) |
| Feb 08, 2012 | 19.16 | 19.39 | 18.81 | 19.14 | 1,533,449 | +0.12(+0.63%) |
| Feb 07, 2012 | 19.25 | 19.41 | 18.80 | 19.02 | 1,573,607 | +0.11(+0.58%) |
| Feb 06, 2012 | 18.68 | 19.17 | 18.65 | 18.91 | 1,366,416 | +0.11(+0.59%) |
| Feb 03, 2012 | 18.25 | 18.88 | 18.08 | 18.80 | 2,800,095 | +0.84(+4.68%) |
| Feb 02, 2012 | 17.85 | 18.15 | 17.61 | 17.96 | 1,119,788 | +0.17(+0.96%) |
| Feb 01, 2012 | 17.79 | 18.10 | 17.75 | 17.79 | 1,521,443 | +0.19(+1.08%) |
| Jan 31, 2012 | 18.00 | 18.13 | 17.53 | 17.60 | 1,101,326 | -0.26(-1.46%) |
| Jan 30, 2012 | 17.85 | 18.10 | 17.80 | 17.86 | 1,204,627 | -0.14(-0.78%) |
| Jan 27, 2012 | 17.56 | 18.14 | 17.50 | 18.00 | 1,276,763 | +0.32(+1.81%) |
| Jan 26, 2012 | 17.95 | 18.19 | 17.55 | 17.68 | 1,167,024 | -0.07(-0.39%) |
| Jan 25, 2012 | 17.65 | 18.00 | 17.34 | 17.75 | 1,294,729 | +0.05(+0.28%) |
| Jan 24, 2012 | 17.13 | 17.84 | 17.05 | 17.70 | 1,647,965 | +0.47(+2.73%) |
| Jan 23, 2012 | 17.11 | 17.40 | 17.05 | 17.23 | 1,519,733 | +0.15(+0.88%) |
| Jan 20, 2012 | 16.81 | 17.11 | 16.72 | 17.08 | 1,956,871 | +0.26(+1.55%) |
| Jan 19, 2012 | 16.54 | 17.00 | 16.47 | 16.82 | 1,981,607 | +0.40(+2.44%) |
| Jan 18, 2012 | 16.05 | 16.63 | 15.94 | 16.42 | 2,388,704 | +0.41(+2.56%) |
| Jan 17, 2012 | 15.91 | 16.13 | 15.77 | 16.01 | 2,301,887 | +0.34(+2.17%) |
| Jan 13, 2012 | 15.67 | 15.95 | 15.57 | 15.67 | 1,877,626 | -0.19(-1.20%) |
| Jan 12, 2012 | 15.91 | 16.13 | 15.68 | 15.86 | 1,178,194 | -0.04(-0.25%) |
| Jan 11, 2012 | 15.55 | 16.00 | 15.45 | 15.90 | 2,514,143 | +0.22(+1.40%) |
| Jan 10, 2012 | 15.80 | 15.89 | 15.57 | 15.68 | 989,092 | +0.09(+0.58%) |
| Jan 09, 2012 | 15.71 | 15.97 | 15.49 | 15.59 | 897,658 | -0.12(-0.76%) |
| Jan 06, 2012 | 16.23 | 16.26 | 15.43 | 15.71 | 3,302,867 | -0.47(-2.90%) |
| Jan 05, 2012 | 16.37 | 16.45 | 15.98 | 16.18 | 1,869,047 | -0.22(-1.34%) |