| Date | Acquired | Amount |
|---|---|---|
| Nov 05, 2008 |
|
$ 6,500,000 |
| Oct 25, 2007 |
|
$ 394,000,000 |
| Sep 11, 2007 |
|
$ 65,000,000 |
| Feb 14, 2007 |
|
$ 51,500,000 |
| Jan 18, 2007 |
|
Undisclosed amount |
