| Date | Acquired | Amount |
|---|---|---|
| Dec 02, 2014 |
|
$ 50,000,000 |
| Sep 16, 2013 |
|
$ 27,700,000 |
| Aug 20, 2012 |
|
$ 111,000,000 |
| Sep 15, 2010 |
|
$ 8,000,000 |
| Jul 21, 2008 |
|
Undisclosed amount |
| Dec 04, 2007 |
|
CA$ 8,000,000 |
| Mar 24, 2007 |
|
Undisclosed amount |
