| Date | Acquired | Amount |
|---|---|---|
| Jul 10, 2017 |
|
$ 201,000,000 |
| Jul 10, 2017 |
|
$ 650,000,000 |
| May 12, 2010 |
|
$ 525,000,000 |
| Jan 07, 2008 |
|
$ 20,000,000 |
| Dec 06, 2007 |
|
$ 18,000,000 |
| Nov 09, 1999 |
|
Undisclosed amount |
