| 18.91 |
| March 20, 2008 |
18.61 |
| March 24, 2008 |
19.38 |
| March 25, 2008 |
18.80 |
| March 26, 2008 |
18.83 |
| March 27, 2008 |
18.25 |
| March 28, 2008 |
18.26 |
| March 31, 2008 |
18.61 |
| April 1, 2008 |
18.74 |
| April 2, 2008 |
18.53 |
| April 3, 2008 |
18.51 |
| April 4, 2008 |
18.44 |
| April 7, 2008 |
19.22 |
| April 8, 2008 |
19.76 |
| April 9, 2008 |
19.24 |
| April 10, 2008 |
19.00 |
| April 11, 2008 |
18.91 |
| April 14, 2008 |
18.98 |
| April 15, 2008 |
18.99 |
| April 16, 2008 |
19.00 |
| April 17, 2008 |
18.78 |
| April 18, 2008 |
18.98 |
| April 21, 2008 |
18.75 |
| April 22, 2008 |
18.13 |
| April 23, 2008 |
17.98 |
| April 24, 2008 |
17.81 |
| April 25, 2008 |
17.69 |
| April 28, 2008 |
17.59 |
| April 29, 2008 |
17.86 |
| April 30, 2008 |
17.65 |
| May 1, 2008 |
17.70 |
| May 2, 2008 |
18.08 |
| May 5, 2008 |
|
| May 6, 2008 |
|
| May 7, 2008 |
|
| May 8, 2008 |
|
| May 9, 2008 |
|