| Date | Acquired | Amount |
|---|---|---|
| Feb 21, 2002 |
|
$ 403,000,000 |
| Jul 11, 2001 |
|
$ 12,500,000 |
| Aug 08, 1999 |
|
$ 94,000,000 |
| Apr 19, 1999 |
|
$ 69,400,000 |
| Jan 29, 1999 |
|
Undisclosed amount |
| Oct 27, 1998 |
|
$ 69,400,000 |
| Aug 02, 1998 |
|
$ 10,800,000 |
