| Date | Acquired | Amount |
|---|---|---|
| Dec 15, 2014 |
|
$ 1,400,000,000 |
| Jul 01, 2014 |
|
Undisclosed amount |
| Feb 07, 2014 |
|
Undisclosed amount |
| Nov 21, 2013 |
|
Undisclosed amount |
| Feb 03, 2012 |
|
Undisclosed amount |
| Jun 10, 2011 |
|
Undisclosed amount |
| Apr 05, 2011 |
|
Undisclosed amount |
| Sep 30, 2008 |
|
Undisclosed amount |
| Apr 25, 2008 |
|
Undisclosed amount |
| Apr 11, 2006 |
|
Undisclosed amount |
| Feb 07, 2005 |
|
Undisclosed amount |
