Dec 31, 1985

Feb 14, 1987

Jul 29, 1988

Jul 06, 1990

Dec 22, 1990

Jun 21, 1991

Dec 31, 1991

Jul 31, 1992

Dec 11, 1992

Jun 17, 1994

Jul 17, 1997

Dec 18, 1997

Apr 30, 1999

Dec 29, 1999