| Date | Acquired | Amount |
|---|---|---|
| Mar 18, 2009 |
|
Undisclosed amount |
| Apr 01, 2008 |
|
Undisclosed amount |
| Feb 01, 2006 |
|
Undisclosed amount |
| Nov 01, 2005 |
|
Undisclosed amount |
| Oct 01, 2001 |
|
Undisclosed amount |
