| Date | Acquired | Amount |
|---|---|---|
| Mar 21, 2016 |
|
$ 5,500,000,000 |
| Jan 11, 2016 |
|
$ 650,000,000 |
| Dec 24, 2015 |
|
$ 460,000,000 |
| Apr 06, 2015 |
|
Undisclosed amount |
| Nov 11, 2014 |
|
Undisclosed amount |
| Mar 22, 2012 |
|
Undisclosed amount |
| Nov 11, 2011 |
|
Undisclosed amount |
| Jul 26, 2011 |
|
$ 500,000,000 |
| Apr 27, 2011 |
|
Undisclosed amount |
| Nov 02, 2010 |
|
$ 95,000,000 |
| May 05, 2010 |
|
Undisclosed amount |
| Sep 18, 2009 |
|
$ 59,000,000 |
| Sep 05, 2008 |
|
Undisclosed amount |
