1/1980 | 2/1980 | 3/1980 | 4/1980 | 5/1980 | 6/1980 | 7–8/1980 | 9/1980 | 10/1980 | 11–12/1980

1/1981 | 2/1981 | 3/1981 | 4/1981 | 5/1981 | 6/1981 | 7–8/1981 | 9/1981 | 10/1981 | 11/1981

1/1982 | 2/1982 | 3–4/1982 | 5/1982 | 6–7/1982 | 8–9/1982

1/1983 | 2/1983 | 3/1983 | 4/1983 | 5–6/1983 | 7/1983 | 8/1983 | 9/1983 | 10–11/1983 | 12/1983

1/1984 | 2/1984 | 3/1984 | 4/1984 | 5/1984 | 6/1984 | 7–8/1984 | 9/1984 | 10/1984 | 11/1984 | 12/1984

1/1985 | 2/1985 | 3/1985 | 4/1985 | 5/1985 | 6/1985 | 7/1985 | 8–9/1985 | 10/1985 | 11/1985 | 12/1985

1/1986 | 2/1986 | 3/1986 | 4/1986 | 5/1986 | 6/1986 | 7/1986 | 8–9/1986 | 10/1986 | 11/1986 | 12/1986

1/1987 | 2/1987 | 3/1987 | 4/1987 | 5/1987 | 6/1987 | 7/1987 | 8/1987 | 9–10/1987 | 11/1987 | 12/1987

1/1988 | 2/1988 | 3/1988 | 4/1988 | 5/1988 | 6/1988 | 7–8/1988 | 9/1988 | 10/1988 | 11–12/1988

1–2/1989 | 3/1989 | 4/1989 | 5–6/1989 | 7/1989 | 8/1989 | 9–10/1989 | 11–12/1989