Nov 01, 1975

May 01, 1977

Jun 01, 1978

Sep 15, 1979

Dec 31, 1980

Feb 01, 1981

Sep 01, 1981

Dec 31, 1984

May 01, 1989

Nov 01, 1990

Dec 31, 1990

Feb 01, 1991

Oct 31, 1991

Jun 26, 1992

Aug 02, 1992

Dec 31, 1992

Jun 02, 1993

Sep 09, 1993

Sep 13, 1993

Sep 13, 1993

Nov 01, 1993

Dec 31, 1993

Apr 01, 1994

Oct 28, 1994

Oct 18, 1995

Nov 06, 1995

Dec 31, 1995

Jan 01, 1996

Apr 16, 1996

Jan 31, 1997

Jan 31, 1997

Nov 28, 1997

Dec 03, 1997

Dec 31, 1997

Jan 31, 1998

Feb 23, 1998