1981 8
1980 5
1979 3
1978 5
1977 2
1977 1
1976 5
1975 1
1975 5
1975 2
1974 2
1974 1
1974 8
1973 4
1973 2
1971 4
1971 2
1970 1
1970 6
1968 3
1968 4