| Date | Acquired | Amount |
|---|---|---|
| Sep 11, 2014 |
|
$ 2,300,000,000 |
| Dec 31, 2012 |
|
Undisclosed amount |
| Apr 06, 2006 |
|
$ 91,100,000 |
| Feb 10, 2006 |
|
$ 36,100,000 |
| Sep 08, 2005 |
|
$ 133,500,000 |
| May 20, 2005 |
|
Undisclosed amount |
| Nov 22, 2004 |
|
$ 11,400,000 |
| Oct 12, 2004 |
|
$ 300,000,000 |
| Dec 04, 2003 |
|
Undisclosed amount |
| Sep 23, 2003 |
|
$ 15,000,000 |
| Dec 01, 2002 |
|
$ 53,900,000 |
| Sep 10, 2002 |
|
$ 13,500,000 |
| Feb 13, 2002 |
|
Undisclosed amount |
| Mar 02, 2001 |
|
Undisclosed amount |
