
| DATE | OPEN | HIGH | LOW | CLOSE | VOLUME |
|---|---|---|---|---|---|
December 2011 | $21.69 | $23.40 | $21.50 | $22.96 | 313,461,268 |
November 2011 | $20.57 | $21.94 | $20.08 | $21.93 | 336,720,224 |
October 2011 | $19.17 | $21.63 | $18.44 | $21.04 | 418,900,160 |
September 2011 | $19.79 | $21.38 | $18.78 | $19.34 | 482,062,076 |
August 2011 | $19.60 | $20.05 | $17.14 | $19.83 | 643,833,012 |
July 2011 | $18.94 | $20.46 | $18.83 | $19.27 | 452,847,808 |
June 2011 | $18.19 | $19.68 | $16.47 | $18.98 | 786,403,508 |
May 2011 | $17.64 | $18.28 | $17.25 | $18.26 | 399,688,144 |
April 2011 | $16.63 | $17.76 | $16.47 | $17.56 | 320,798,888 |
March 2011 | $16.61 | $17.07 | $15.84 | $16.55 | 528,558,792 |
February 2011 | $15.75 | $17.33 | $15.75 | $16.42 | 457,434,300 |
January 2011 | $15.80 | $16.50 | $15.15 | $15.67 | 558,182,292 |