| Date | Acquired | Amount |
|---|---|---|
| Mar 07, 2007 |
|
Undisclosed amount |
| Jul 11, 2006 |
|
Undisclosed amount |
| Dec 02, 2004 |
|
$ 40,000,000 |
| Dec 04, 2003 |
|
$ 10,000,000 |
| Feb 28, 2002 |
|
$ 13,000,000 |
