1976 (1 copy)

1977 (2 copies)

1978 (2 copies)

1979 (2 copies)

1981 (2 copies)

1982 (2 copies)

1983 (1 copy)

1984 (2 copies)

1985 (2 copies)

1986 (1 copy)

1987 (2 copies)

1988 (1 copy)

1989 (2 copies)

1990 (1 copy)

1991 (1 copy)