| Date | Acquired | Amount |
|---|---|---|
| Jan 19, 2016 |
|
$ 3,600,000,000 |
| May 08, 2015 |
|
$ 839,000,000 |
| Jul 14, 2014 |
|
$ 328,500,000 |
| Feb 10, 2014 |
|
Undisclosed amount |
| Nov 21, 2013 |
|
Undisclosed amount |
| Jun 04, 2013 |
|
Undisclosed amount |
| May 02, 2012 |
|
Undisclosed amount |
| May 02, 2012 |
|
Undisclosed amount |
| Apr 20, 2012 |
|
Undisclosed amount |
| Feb 03, 2010 |
|
$ 284,000,000 |
| Apr 01, 2009 |
|
Undisclosed amount |
| Mar 09, 2009 |
|
Undisclosed amount |
| Jun 05, 2002 |
|
$ 50,000,000 |
