| Date | Acquired | Amount |
|---|---|---|
| Jul 23, 2008 |
|
Undisclosed amount |
| Oct 01, 2007 |
|
Undisclosed amount |
| Aug 17, 2005 |
|
Undisclosed amount |
| Oct 19, 2000 |
|
Undisclosed amount |
| Jul 12, 1999 |
|
Undisclosed amount |
