| Date Filed | Type | Description |
| 08/22/2016 |
10-K
| Annual Report for the period ended May 31, 2016 |
| 08/21/2015 |
10-K
| Annual Report for the period ended May 31, 2015 |
| 08/26/2014 |
10-K
| Annual Report for the period ended May 31, 2014 |
| 08/26/2013 |
10-K
| Annual Report for the period ended May 31, 2013 |
| 07/27/2012 |
10-K
| Annual Report for the period ended May 31, 2012 |
| 08/16/2011 |
10-K/A
| Annual Report for the period ended May 31, 2011 [amend] |
| 07/20/2011 |
10-K
| Annual Report for the period ended May 31, 2011 |
| 07/26/2010 |
10-K/A
| Annual Report for the period ended May 31, 2010 [amend] |
| 07/23/2010 |
10-K
| Annual Report for the period ended May 31, 2010 |
| 07/24/2009 |
10-K
| Annual Report for the period ended May 31, 2009 |
| 07/24/2008 |
10-K
| Annual Report for the period ended May 31, 2008 |
| 09/07/2007 |
10-K/A
| Annual Report for the period ended May 31, 2007 [amend] |
| 07/27/2007 |
10-K
| Annual Report for the period ended May 31, 2007 |
| 12/06/2006 |
10-K/A
| Annual Report for the period ended May 31, 2004 [amend] |
| 07/31/2006 |
10-K
| Annual Report for the period ended May 31, 2006 |
| 10/19/2005 |
10-K
| Annual Report for the period ended May 31, 2005 |
| 08/16/2004 |
10-K
| Annual Report for the period ended May 31, 2004 |
| 08/28/2003 |
10-K
| Annual Report for the period ended May 31, 2003 |
| 08/29/2002 |
10-K
| Annual Report for the period ended May 31, 2002 |
| 10/17/2001 |
10-K/A
| Annual Report for the period ended May 31, 2001 [amend] |
| 09/13/2001 |
10-K
| Annual Report for the period ended May 31, 2001 |
| 08/29/2000 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 08/30/1999 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 08/20/1998 |
10-K405/A
| Form 10-K405/A - Annual report [Sections 13 and 15(d), S-K Item 405] [Amend] |
| 08/17/1998 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 08/27/1997 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 08/26/1996 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 08/23/1995 |
10-K
| Annual Report for the period ended May 31, 1995 |