| Date | Acquired | Amount |
|---|---|---|
| May 04, 2017 |
|
$ 160,000,000 |
| Dec 09, 2014 |
|
$ 710,000,000 |
| Jul 30, 2014 |
|
Undisclosed amount |
| Feb 07, 2014 |
|
$ 220,000,000 |
| Dec 11, 2012 |
|
$ 515,700,000 |
| Jun 05, 2012 |
|
Undisclosed amount |
| Sep 01, 2011 |
|
Undisclosed amount |
| Jul 26, 2011 |
|
Undisclosed amount |
| Apr 04, 2011 |
|
$ 30,000,000 |
| Nov 23, 2010 |
|
Undisclosed amount |
| Nov 11, 2010 |
|
$ 78,000,000 |
| Dec 21, 2009 |
|
Undisclosed amount |
| Jun 06, 2008 |
|
$ 133,000,000 |
| Mar 28, 2007 |
|
Undisclosed amount |
| Feb 07, 2007 |
|
$ 195,000,000 |
| Jan 30, 2007 |
|
$ 260,000,000 |
| Feb 05, 2004 |
|
$ 429,000,000 |
| Feb 21, 1997 |
|
Undisclosed amount |
