1980

February. 1980 March, 1980 April, 1980 May, 1980 June, 1980  September, 1980 October, 1980 November, 1980 December, 1980

1981

February. 1981 March, 1981 April, 1981 May, 1981 June, 1981 September, 1981 October, 1981 November, 1981 December, 1981

1982

February, 1982 March, 1982 May, 1982 June, 1982 September, 1982 October, 1982 November, 1982 December, 1982

1983

February. 1983 March, 1983 April, 1983 May, 1983 June, 1983 September, 1983 October, 1983 November, 1983 December, 1983

1984

February, 1984 March, 1984 April, 1984 May, 1984 June, 1984 September, 1984 October, 1984 November, 1984 December, 1984

1985

February, 1985 March, 1985 April, 1985 May, 1985 June, 1985 September, 1985 October, 1985 November, 1985 December, 1985

1986

February, 1986 March, 1986 April, 1986 May, 1986 June, 1986 July. 1986 September, 1986 October, 1986 November, 1986 December, 1986

1987

February, 1987 March, 1987 April, 1987 May, 1987 June, 1987 September, 1987 October, 1987 November, 1987 December, 1987

1988

February, 1988 March, 1988 April, 1988 May, 1988 June, 1988 September, 1988 October, 1988 November, 1988 December, 1988

1989

February, 1989 March, 1989 April, 1989 May, 1989 June, 1989 September, 1989 October, 1989 November, 1989 December, 1989