| Date | Acquired | Amount |
|---|---|---|
| May 06, 2015 |
|
Undisclosed amount |
| Mar 06, 2013 |
|
Undisclosed amount |
| Apr 03, 2012 |
|
Undisclosed amount |
| Jul 10, 2008 |
|
$ 15,300,000,000 |
| Dec 18, 2006 |
|
$ 603,000,000 |
| Mar 29, 2001 |
|
$ 335,000,000 |
| Feb 09, 2001 |
|
$ 500,000,000 |
| Jan 11, 2000 |
|
$ 160,000,000 |
| Aug 05, 1999 |
|
$ 8,890,000,000 |
