| Date Filed | Type | Description |
| 03/29/2013 |
10-K
| Annual Report for the period ended December 31, 2012 |
| 03/23/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 03/17/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 04/07/2010 |
10-K
| Annual Report for the period ended December 31, 2009 |
| 03/31/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 03/26/2008 |
10-K
| Annual Report for the period ended December 31, 2007 |
| 03/23/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 11/07/2006 |
10-K/A
| Annual Report for the period ended December 31, 2005 [amend] |
| 10/10/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |
| 10/05/2005 |
10-K/A
| Annual Report for the period ended December 31, 2004 [amend] |
| 03/31/2005 |
10-K
| Annual Report for the period ended December 31, 2004 |
| 03/15/2004 |
10-K
| Annual Report for the period ended December 31, 2003 |
| 03/27/2003 |
10-K
| Annual Report for the period ended December 31, 2002 |
| 03/28/2002 |
10-K
| Annual Report for the period ended December 31, 2001 |
| 03/29/2001 |
10-K
| Annual Report for the period ended December 31, 2000 |
| 03/29/2000 |
10-K
| Annual Report for the period ended December 31, 1999 |
| 03/16/1999 |
10-K
| Annual Report for the period ended December 31, 1998 |
| 03/31/1998 |
10-K
| Annual Report for the period ended December 31, 1997 |
| 03/31/1997 |
10-K
| Annual Report for the period ended December 31, 1996 |
| 04/03/1996 |
10-K/A
| Annual Report for the period ended December 31, 1995 [amend] |
| 03/29/1996 |
10-K
| Annual Report for the period ended December 31, 1995 |