Quarterly Reports
 December 31, 2012 |
 September 30 2012 |
 June 30, 2012 |
 March 31, 2012 |
| 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 |
| March 31 | March 31 | March 31 | March 31 | March 31 | March 31 | N/A |
| June 30 | June 30 | June 30 | June 30 | June 30 | June 30 | N/A |
| September 30 | September 30 | September 30 | September 30 | September 30 | September 30 | N/A |
| December 31 | December 31 | December 31 | December 31 | December 31 | December 31 | December 31 |