December 31, 2004
June 30, 2004
December 31, 2003
July 31, 2003
July 31, 2002
December 31, 2001
July 30, 2001
December 31, 2000
June 30, 2000
December 31, 1999
June 30, 1999
December 31, 1998
June 30, 1998
December 31, 1997
June 30, 1997
December 31, 1996
June 30, 1994
December 31, 1992
June 30, 1991