2008, 2007, 2006
| Date Filed | Form |
| April 23, 2008 | RW |
| April 21, 2008 | RW |
| April 18, 2008 | 6-K |
| April 15, 2008 | 6-K |
| April 15, 2008 | 6-K |
| April 7, 2008 | 6-K |
| March 31, 2008 | 6-K |
| March 28, 2008 | 6-K |
| March 19, 2008 | SC 13D/A |
| March 5, 2008 | 6-K |
| February 29, 2008 | F-3 |
| February 15, 2008 | 6-K |
| February 11, 2008 | 6-K |
| January 30, 2008 | 6-K |
| January 15, 2007 | 6-K |
| January 8, 2008 | 6-K |
| December 21, 2007 | 6-K |
| December 20, 2007 | 6-K |
| December 12, 2007 | 6-K |
| November 5, 2007 | 6-K |
| November 1, 2007 | 20-F/A |
| October 30, 2007 | 6-K |
| October 23, 2007 | 6-K |
| October 15, 2007 | 20-F |
| September 27, 2007 | 6-K |
| September 25, 2007 | 6-K |
| September 24, 2007 | 6-K |
| August 31, 2007 | 6-K |
| August 29, 2007 | 6-K |
| August 27, 2007 | 6-K |
| August 20, 2007 | 6-K |
| August 20, 2007 | 6-K |
| August 3, 2007 | 6-K |
| August 2, 2007 | 6-K |
| August 2, 2007 | 6-K |
| August 1, 2007 | 6-K |
| July 19, 2007 | 6-K |
| May 21, 2007 | 6-K |
| April 27, 2007 | 6-K |
| March 23, 2007 | 6-K |
| March 7, 2007 | 6-K |
| January 18, 2007 | 6-K |
| January 16, 2007 | 6-K |
| December 22, 2006 | 6-K |
| December 11, 2006 | 6-K |
| November 30, 2006 | 6-K |
| November 3, 2006 | 6-K |
| November 1, 2006 | 6-K |
| October 20, 2006 | 6-K |
| October 12, 2006 | 6-K |
| October 10, 2006 | 20-F |
| May 31, 2006 | 424B4 |
| March 24, 2006 | F-1/A |
| March 6, 2006 | 6-K |
| February 24, 2006 | F-1 |
| January 27, 2006 | F-1 |
| January 11, 2006 | 6-K |