| Date | Acquired | Amount |
|---|---|---|
| Jan 18, 2007 |
|
Undisclosed amount |
| Sep 01, 2006 |
|
Undisclosed amount |
| Apr 25, 2006 |
|
$ 140,000,000 |
| Jul 27, 2004 |
|
$ 3,000,000 |
| Jul 13, 2001 |
|
$ 6,700,000 |
| May 10, 2001 |
|
Undisclosed amount |
