| Date | Open | High | Low | Close | Volume |
|---|---|---|---|---|---|
| Jun 1, 2011 | 175.00 | 175.00 | 175.00 | 175.00 | 200 |
| May 31, 2011 | 168.00 | 168.00 | 168.00 | 168.00 | 0 |
| May 30, 2011 | 168.00 | 168.00 | 168.00 | 168.00 | 0 |
| May 27, 2011 | 170.00 | 170.00 | 167.50 | 168.00 |
| 4.8K |
| May 26, 2011 | 173.00 | 180.00 | 173.00 | 180.00 | 600 |
| May 25, 2011 | 183.50 | 183.50 | 183.50 | 183.50 | 400 |
| May 24, 2011 | 183.50 | 183.50 | 183.50 | 183.50 | 400 |
| May 23, 2011 | 177.00 | 180.50 | 173.50 | 180.50 | 2K |
| May 20, 2011 | 198.00 | 198.00 | 198.00 | 198.00 | 200 |
| May 19, 2011 | 198.00 | 198.00 | 198.00 | 198.00 | 200 |
| May 18, 2011 | 195.50 | 195.50 | 195.50 | 195.50 | 200 |
| May 17, 2011 | 195.50 | 195.50 | 195.50 | 195.50 | 200 |
| May 16, 2011 | 195.50 | 195.50 | 195.50 | 195.50 | 200 |
| May 13, 2011 | 195.50 | 195.50 | 195.50 | 195.50 | 200 |
| May 12, 2011 | 199.00 | 199.00 | 199.00 | 199.00 | 400 |
| May 11, 2011 | 199.00 | 199.00 | 199.00 | 199.00 | 400 |
| May 10, 2011 | 178.50 | 195.50 | 175.50 | 195.50 | 2.4K |
| May 9, 2011 | 192.00 | 192.00 | 192.00 | 192.00 | 0 |
| May 6, 2011 | 192.00 | 192.00 | 192.00 | 192.00 | 0 |
| May 2, 2011 | 180.50 | 180.50 | 180.50 | 180.50 | 0 |
| Apr 28, 2011 | 180.50 | 180.50 | 180.50 | 180.50 | 1K |
| Apr 27, 2011 | 180.50 | 180.50 | 180.50 | 180.50 | 1K |
| Apr 26, 2011 | 180.50 | 180.50 | 180.50 | 180.50 | 1K |
| Apr 25, 2011 | 175.00 | 180.50 | 173.50 | 180.50 | 1K |
| Apr 22, 2011 | 184.00 | 184.00 | 184.00 | 184.00 | 200 |
| Apr 21, 2011 | 182.75 | 182.75 | 182.75 | 182.75 | 2.6K |
| Apr 20, 2011 | 182.75 | 182.75 | 182.75 | 182.75 | 2.6K |
| Apr 19, 2011 | 172.50 | 182.75 | 172.50 | 182.75 | 2.6K |
| Apr 18, 2011 | 190.00 | 190.00 | 176.00 | 183.00 | 2.6K |
| Apr 15, 2011 | 193.50 | 193.50 | 193.50 | 193.50 | 200 |