Year Per 100,000 People 1955 17.6072 1956 20.9944 1957 16.7181 1958 17.8876 1959 19.1067 1960 19.1316 1963 16.7214 1964 14.0738 1965 17.4008 1966 16.8109 1967 16.5097 1968 16.712 1969 16.5402 1970 14.4837 1971 17.0682 1972 18.9679 1973 19.2242 1974 17.7385 1975 16.6444 1976 16.1364 1977 19.3651 1978 16.3368 1980 15.6173 1981 15.0451 1982 17.9109 1983 18.4146 1984 17.9459 1985 15.7651 1986 13.2705 1987 12.5245 1988 13.8472 1989 17.9487 1990 16.291