| Date | Acquired | Amount |
|---|---|---|
| Sep 12, 2017 |
|
$ 385,000,000 |
| May 10, 2017 |
|
Undisclosed amount |
| Feb 01, 2017 |
|
Undisclosed amount |
| May 05, 2016 |
|
Undisclosed amount |
| Mar 03, 2014 |
|
$ 585,000,000 |
| Oct 28, 2011 |
|
Undisclosed amount |
| Apr 27, 2011 |
|
$ 860,000,000 |
| Oct 20, 2009 |
|
Undisclosed amount |
| Jul 18, 2009 |
|
Undisclosed amount |
| Dec 14, 2000 |
|
Undisclosed amount |
