| Date | Acquired | Amount |
|---|---|---|
| Nov 22, 2010 |
|
$ 5,000,000 |
| Oct 22, 2009 |
|
$ 165,000,000 |
| May 20, 2004 |
|
$ 1,900,000,000 |
| Jun 30, 1999 |
|
$ 575,000,000 |
