| Date | Acquired | Amount |
|---|---|---|
| Aug 03, 2017 |
|
$ 185,000,000 |
| Dec 04, 2016 |
|
Undisclosed amount |
| Oct 20, 2016 |
|
Undisclosed amount |
| Mar 24, 2016 |
|
Undisclosed amount |
| Jul 10, 2014 |
|
Undisclosed amount |
| Mar 05, 2013 |
|
$ 235,000,000 |
| Jun 09, 2010 |
|
$ 1,300,000,000 |
| Jan 02, 2008 |
|
$ 90,000,000 |
| Mar 02, 2006 |
|
$ 272,000,000 |
| Aug 08, 2003 |
|
Undisclosed amount |
| Jul 16, 2003 |
|
$ 18,000,000 |
| Mar 02, 2000 |
|
Undisclosed amount |
