| Date | Acquired | Amount |
|---|---|---|
| Jun 30, 2016 |
|
$ 4,400,000,000 |
| Oct 19, 2005 |
|
$ 35,000,000 |
| Oct 29, 2003 |
|
$ 220,000,000 |
| Nov 27, 2000 |
|
Undisclosed amount |
| Jun 07, 2000 |
|
Undisclosed amount |
