| 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 |
18.37 |
| May 6, 2008 |
16.92 |
| May 7, 2008 |
16.30 |
| May 8, 2008 |
16.11 |
| May 9, 2008 |
16.09 |
| May 12, 2008 |
16.93 |
| May 13, 2008 |
16.50 |
| May 14, 2008 |
16.25 |
| May 15, 2008 |
16.15 |
| May 16, 2008 |
16.34 |
| May 19, 2008 |
16.28 |
| May 20, 2008 |
16.46 |
| May 21, 2008 |
16.62 |
| May 22, 2008 |
16.66 |
| May 23, 2008 |
16.45 |
| May 27, 2008 |
16.27 |
| May 28, 2008 |
16.25 |
| May 29, 2008 |
16.74 |
| May 30, 2008 |
16.65 |
| June 2, 2008 |
16.34 |
| June 3, 2008 |
16.49 |
| June 4, 2008 |
16.38 |
| June 5, 2008 |
16.51 |
| June 6, 2008 |
16.23 |
| June 9, 2008 |
15.90 |
| June 10, 2008 |
16.26 |
| June 11, 2008 |
15.63 |
| June 12, 2008 |
15.35 |
| June 13, 2008 |
15.17 |
| June 16, 2008 |
|
| June 17, 2008 |
|
| June 18, 2008 |
|
| June 19, 2008 |
|
| June 20, 2008 |
|