15 1965 11 1966 18 1967 23 1968 21 1969 28 1970 18 1971 28 1972 29 1973 17 1974 15 1975 12 1976 12 1977 13 1978 7 1979 15 1980 11 1981 8 1982 4 1983 7 1984 4 1985 4 1986 3 1987 4 1988 2 1989 1 1992 1 1995 331