| Date | Acquired | Amount |
|---|---|---|
| May 21, 2015 |
|
$ 12,900,000,000 |
| Jul 14, 2014 |
|
Undisclosed amount |
| Nov 27, 2013 |
|
Undisclosed amount |
| Dec 01, 2010 |
|
$ 1,250,000,000 |
| Dec 01, 2009 |
|
Undisclosed amount |
| Oct 20, 2008 |
|
Undisclosed amount |
| Aug 12, 2008 |
|
$ 2,900,000,000 |
| Jul 13, 2006 |
|
Undisclosed amount |
| Apr 05, 2004 |
|
$ 2,150,000,000 |
| Jul 06, 2000 |
|
$ 124,000,000 |
| Jul 05, 2000 |
|
Undisclosed amount |
| Mar 18, 1999 |
|
Undisclosed amount |
| Mar 31, 1998 |
|
Undisclosed amount |
