| Date | Acquired | Amount |
|---|---|---|
| Sep 07, 2016 |
|
$ 4,400,000,000 |
| Dec 02, 2010 |
|
Undisclosed amount |
| Mar 16, 2009 |
|
$ 9,500,000 |
| Jan 01, 2008 |
|
Undisclosed amount |
| Dec 21, 2007 |
|
Undisclosed amount |
| Jan 18, 2005 |
|
$ 3,650,000,000 |
