| Date | Acquired | Amount |
|---|---|---|
| Nov 26, 2015 |
|
$ 200,000,000 |
| Oct 01, 2015 |
|
Undisclosed amount |
| Jun 12, 2015 |
|
$ 220,000,000 |
| Jul 03, 2014 |
|
A$ 200,000,000 |
| Jul 01, 2014 |
|
Undisclosed amount |
| Mar 01, 2013 |
|
Undisclosed amount |
| Jun 14, 2011 |
|
$ 450,000,000 |
| Jun 08, 2011 |
|
$ 240,000,000 |
| May 01, 2011 |
|
Undisclosed amount |
| Oct 21, 2010 |
|
Undisclosed amount |
| May 01, 2010 |
|
Undisclosed amount |
| Jan 01, 2009 |
|
Undisclosed amount |
| Jun 01, 2007 |
|
Undisclosed amount |
| Jan 01, 2005 |
|
Undisclosed amount |
| Sep 01, 2001 |
|
Undisclosed amount |
| Jan 01, 1998 |
|
Undisclosed amount |
