| December 2008 |
4,569,800 |
| November 2008 |
4,568,500 |
| October 2008 |
4,563,800 |
| September 2008 |
4,586,500 |
| August 2008 |
4,599,400 |
| July 2008 |
4,616,900 |
| June 2008 |
4,614,800
|
| May 2008 |
4,613,900 |
| April 2008 |
4,602,700 |
| March 2008 |
4,615,300 |
| February 2008 |
4,597,000 |
| January 2008 |
4,626,400 |
|