| Date | Acquired | Amount |
|---|---|---|
| May 23, 2017 |
|
Undisclosed amount |
| Apr 19, 2016 |
|
$ 360,000,000 |
| Oct 01, 2013 |
|
$ 324,000,000 |
| Apr 03, 2013 |
|
Undisclosed amount |
| May 21, 2012 |
|
Undisclosed amount |
| Dec 23, 2011 |
|
Undisclosed amount |
| Jul 26, 2011 |
|
Undisclosed amount |
| Jun 28, 2011 |
|
Undisclosed amount |
| May 01, 2011 |
|
$ 30,000,000 |
| Jan 17, 2011 |
|
Undisclosed amount |
| Jun 24, 2010 |
|
Undisclosed amount |
| Oct 05, 2009 |
|
$ 10,000,000 |
| Dec 10, 2008 |
|
Undisclosed amount |
| Apr 19, 2007 |
|
$ 240,000,000 |
| Jan 27, 2006 |
|
£ 85,000,000 |
| May 05, 2005 |
|
$ 330,000,000 |
| Mar 04, 2004 |
|
Undisclosed amount |
| Feb 18, 2004 |
|
Undisclosed amount |
