
| DATE | OPEN | HIGH | LOW | CLOSE | VOLUME | 
|---|---|---|---|---|---|
| December 2009    | $22.08    | $23.56    | $21.88    | $22.80    | 920,605,500    | 
| November 2009    | $20.63    | $22.54    | $20.41    | $22.00    | 1,018,256,700    | 
| October 2009    | $18.92    | $21.86    | $18.19    | $20.65    | 1,523,430,100    | 
| September 2009    | $18.13    | $19.55    | $17.69    | $19.15    | 1,038,979,700    | 
| August 2009    | $17.64    | $18.98    | $17.05    | $18.36    | 993,250,400    | 
| July 2009    | $17.81    | $19.05    | $16.29    | $17.42    | 1,517,459,800    | 
| June 2009    | $15.55    | $18.02    | $15.45    | $17.60    | 1,411,144,700    | 
| May 2009    | $14.86    | $15.51    | $13.99    | $15.47    | 1,101,122,400    | 
| April 2009    | $13.42    | $15.60    | $13.38    | $14.91    | 1,562,400,700    | 
| March 2009    | $11.74    | $13.89    | $10.94    | $13.52    | 1,625,752,800    | 
| February 2009    | $12.45    | $14.57    | $11.85    | $11.88    | 1,456,213,400    | 
| January 2009    | $14.27    | $15.35    | $12.24    | $12.50    | 1,564,043,400    | 
| December 2008    | $14.53    | $15.53    | $13.50    | $14.21    | 1,546,943,400    | 
| November 2008    | $16.32    | $17.18    | $12.79    | $14.78    | 1,794,911,800    | 
| October 2008    | $19.15    | $19.94    | $14.99    | $16.21    | 3,044,579,400    | 
| September 2008    | $20.09    | $20.15    | $17.06    | $19.38    | 1,927,538,700    | 
| August 2008    | $18.74    | $20.61    | $18.13    | $19.81    | 1,206,949,700    | 
| July 2008    | $19.72    | $20.18    | $17.98    | $18.60    | 1,637,501,300    | 
| June 2008    | $20.42    | $21.38    | $19.60    | $19.89    | 1,560,439,100    | 
| May 2008    | $20.53    | $22.08    | $20.21    | $20.48    | 1,405,170,200    | 
| April 2008    | $20.77    | $23.13    | $20.12    | $20.55    | 1,444,720,000    | 
| March 2008    | $19.62    | $21.32    | $19.36    | $20.45    | 1,452,390,200    | 
| February 2008    | $22.29    | $23.86    | $19.47    | $19.60    | 2,324,580,800    | 
| January 2008    | $25.68    | $25.81    | $22.27    | $23.39    | 1,950,301,600    | 
| December 2007    | $24.04    | $26.35    | $23.42    | $25.55    | 1,064,817,100    |