Sep 15, 1979

Nov 01, 1980

Sep 01, 1981

Dec 31, 1981

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Dec 10, 1982

Mar 01, 1983

Apr 01, 1984

Dec 31, 1984

Dec 31, 1985

Sep 19, 1986

Nov 26, 1986

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Dec 04, 1987

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Dec 31, 1987

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Dec 31, 1988

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Dec 31, 1990

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Dec 31, 1992

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Dec 31, 1993

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Oct 26, 2000

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Dec 21, 2000

Feb 02, 2001

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Jul 06, 2004