| Date | Acquired | Amount |
|---|---|---|
| Mar 20, 2006 |
|
Undisclosed amount |
| May 18, 2004 |
|
$ 58,000,000 |
| Mar 02, 2004 |
|
Undisclosed amount |
| Jan 02, 2002 |
|
$ 530,000,000 |
