| DATE | OPEN | HIGH | LOW | CLOSE | VOLUME | 
|---|---|---|---|---|---|
| December 2009    | $18.69    | $20.72    | $17.31    | $18.94    | 243,815,600    | 
| November 2009    | $21.75    | $25.33    | $17.72    | $17.94    | 366,250,600    | 
| October 2009    | $27.53    | $29.96    | $20.86    | $21.24    | 574,491,000    | 
| September 2009    | $25.93    | $34.37    | $20.64    | $27.87    | 1,144,957,400    | 
| August 2009    | $8.40    | $35.32    | $8.19    | $28.64    | 1,178,001,300    | 
| July 2009    | $12.42    | $14.51    | $5.19    | $8.30    | 579,763,300    | 
| June 2009    | $21.48    | $21.99    | $13.65    | $14.66    | 55,970,810    | 
| May 2009    | $17.44    | $27.67    | $17.31    | $21.36    | 121,326,155    | 
| April 2009    | $12.38    | $22.49    | $12.26    | $17.44    | 120,331,950    | 
| March 2009    | $6.57    | $25.27    | $4.17    | $12.64    | 201,987,810    | 
| February 2009    | $16.05    | $16.05    | $4.80    | $5.31    | 50,440,900    | 
| January 2009    | $19.84    | $22.11    | $15.80    | $16.18    | 30,970,855    | 
| December 2008    | $24.77    | $26.79    | $19.21    | $19.84    | 44,661,575    | 
| November 2008    | $25.27    | $35.89    | $18.20    | $25.40    | 74,570,090    | 
| October 2008    | $47.14    | $62.68    | $17.06    | $24.14    | 130,256,020    | 
| September 2008    | $277.73    | $311.88    | $15.80    | $42.08    | 288,265,890    | 
| August 2008    | $331.77    | $374.05    | $233.19    | $268.84    | 48,044,960    | 
| July 2008    | $326.39    | $388.94    | $246.83    | $325.89    | 45,998,160    | 
| June 2008    | $447.86    | $460.00    | $329.89    | $331.02    | 33,028,330    | 
| May 2008    | $575.01    | $615.81    | $429.58    | $447.86    | 43,695,695    | 
| April 2008    | $553.73    | $611.83    | $535.82    | $574.76    | 16,257,870    | 
| March 2008    | $577.33    | $592.55    | $478.97    | $538.06    | 25,146,510    | 
| February 2008    | $681.99    | $701.07    | $546.24    | $580.43    | 28,511,875    | 
| January 2008    | $725.72    | $736.00    | $611.89    | $680.88    | 20,970,770    | 
| December 2007    | $712.13    | $771.67    | $676.79    | $722.13    | 17,335,050    |