| Date | Acquired | Amount |
|---|---|---|
| Jan 06, 2016 |
|
Undisclosed amount |
| Dec 23, 2015 |
|
Undisclosed amount |
| Sep 09, 2014 |
|
$ 820,000,000 |
| May 24, 2012 |
|
$ 840,000,000 |
| May 11, 2012 |
|
$ 12,180,000 |
| Mar 07, 2012 |
|
Undisclosed amount |
| May 18, 2011 |
|
$ 1,200,000,000 |
| Jun 10, 2008 |
|
Undisclosed amount |
| Feb 05, 2007 |
|
Undisclosed amount |
| Jul 17, 2000 |
|
Undisclosed amount |
