| Date | Acquired | Amount |
|---|---|---|
| Feb 16, 2016 |
|
$ 3,900,000 |
| Aug 14, 2014 |
|
Undisclosed amount |
| Aug 26, 2012 |
|
$ 300,000,000 |
| Jul 02, 2012 |
|
Undisclosed amount |
| Jan 22, 2009 |
|
Undisclosed amount |
| May 15, 2008 |
|
Undisclosed amount |
| May 20, 2005 |
|
Undisclosed amount |
| Feb 01, 2005 |
|
Undisclosed amount |
| Jun 09, 2004 |
|
Undisclosed amount |
| Mar 04, 2004 |
|
$ 343,000,000 |
| Feb 12, 2002 |
|
Undisclosed amount |
| Sep 01, 2001 |
|
Undisclosed amount |
| Feb 01, 2000 |
|
Undisclosed amount |
| Nov 16, 1999 |
|
Undisclosed amount |
