| Date | Acquired | Amount |
|---|---|---|
| Feb 01, 2007 |
|
$ 29,500,000 |
| May 23, 2006 |
|
$ 11,100,000 |
| Jun 10, 2005 |
|
Undisclosed amount |
| Jan 09, 2005 |
|
$ 98,000,000 |
| Jul 23, 2004 |
|
Undisclosed amount |
| Jun 14, 2002 |
|
Undisclosed amount |
| Feb 02, 2002 |
|
Undisclosed amount |
| Mar 21, 2001 |
|
$ 30,000,000 |
| Apr 24, 2000 |
|
Undisclosed amount |
| May 14, 1999 |
|
$ 33,500,000 |
