| Date | Acquired | Amount |
|---|---|---|
| Apr 30, 2008 |
|
Undisclosed amount |
| Apr 10, 2006 |
|
Undisclosed amount |
| Mar 01, 2006 |
|
Undisclosed amount |
| Nov 12, 2004 |
|
$ 128,000,000 |
| Oct 12, 2002 |
|
Undisclosed amount |
| Mar 01, 2001 |
|
Undisclosed amount |
