| Date | Acquired | Amount |
|---|---|---|
| Sep 14, 2016 |
|
Undisclosed amount |
| Apr 09, 2015 |
|
$ 160,000,000 |
| Jul 15, 2013 |
|
Undisclosed amount |
| Mar 14, 2013 |
|
$ 500,000,000 |
| Sep 05, 2012 |
|
Undisclosed amount |
| Sep 30, 2011 |
|
Undisclosed amount |
| Sep 01, 2004 |
|
$ 1,250,000,000 |
