| Date Filed | Type | Description |
| 02/23/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 02/22/2010 |
10-K
| Annual Report for the period ended December 31, 2009 |
| 02/23/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 02/29/2008 |
10-K
| Annual Report for the period ended December 31, 2007 |
| 02/23/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 04/12/2006 |
10-K/A
| Annual Report for the period ended December 31, 2005 [amend] |
| 02/23/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |
| 02/22/2005 |
10-K
| Annual Report for the period ended December 31, 2004 |
| 02/12/2004 |
10-K
| Annual Report for the period ended December 31, 2003 |
| 02/24/2003 |
10-K
| Annual Report for the period ended December 31, 2002 |
| 02/22/2002 |
10-K
| Annual Report for the period ended December 31, 2001 |
| 03/13/2001 |
10-K
| Annual Report for the period ended December 31, 2000 |
| 03/06/2000 |
10-K
| Annual Report for the period ended December 31, 1999 |
| 02/22/1999 |
10-K
| Annual Report for the period ended December 31, 1998 |
| 07/02/1998 |
10-K/A
| Annual Report for the period ended December 31, 1997 [amend] |
| 07/02/1998 |
10-K/A
| Annual Report for the period ended December 31, 1997 [amend] |
| 02/11/1998 |
10-K
| Annual Report for the period ended December 31, 1997 |
| 02/13/1997 |
10-K
| Annual Report for the period ended December 31, 1996 |
| 02/21/1996 |
10-K/A
| Annual Report for the period ended December 31, 1995 [amend] |
| 02/14/1996 |
10-K/A
| Annual Report for the period ended December 31, 1995 [amend] |
| 02/13/1996 |
10-K
| Annual Report for the period ended December 31, 1995 |
| 02/08/1995 |
10-K
| Annual Report for the period ended December 31, 1994 |
| 02/09/1994 |
10-K
| Annual Report for the period ended February 8, 1994 |