| Date Filed | Type | Description |
| 04/04/2012 |
10-K
| Annual Report for the period ended January 31, 2012 |
| 04/04/2011 |
10-K
| Annual Report for the period ended January 31, 2011 |
| 04/05/2010 |
10-K
| Annual Report for the period ended January 31, 2010 |
| 04/06/2009 |
10-K
| Annual Report for the period ended January 31, 2009 |
| 04/07/2008 |
10-K
| Annual Report for the period ended January 31, 2008 |
| 04/13/2007 |
10-K
| Annual Report for the period ended January 31, 2007 |
| 04/17/2006 |
10-K
| Annual Report for the period ended January 31, 2006 |
| 04/18/2005 |
10-K
| Annual Report for the period ended January 31, 2005 |
| 04/07/2004 |
10-K
| Annual Report for the period ended January 31, 2004 |
| 04/22/2003 |
10-K
| Annual Report for the period ended January 31, 2003 |
| 04/18/2002 |
10-K
| Annual Report for the period ended January 31, 2002 |
| 05/01/2001 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 05/01/2001 |
10-K405/A
| Form 10-K405/A - Annual report [Sections 13 and 15(d), S-K Item 405] [Amend] |
| 04/28/2000 |
10-K
| Annual Report for the period ended January 31, 2000 |
| 04/30/1999 |
10-K
| Annual Report for the period ended January 31, 1999 |
| 04/30/1998 |
10-K
| Annual Report for the period ended January 31, 1998 |
| 04/14/1997 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 04/12/1996 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 04/07/1995 |
10-K
| Annual Report for the period ended January 31, 1995 |