| Date | Acquired | Amount |
|---|---|---|
| Dec 01, 2007 |
|
Undisclosed amount |
| Nov 20, 2006 |
|
Undisclosed amount |
| Jan 31, 2006 |
|
NOK 298,000,000 |
| May 14, 2004 |
|
$ 39,000,000 |
