Year Per 100,000 People 1955 7.8215 1956 9.4876 1957 6.9345 1958 5.6002 1959 5.79 1960 7.0103 1963 4.7488 1964 3.9863 1965 5.6872 1966 5.506 1967 5.0248 1968 4.8722 1969 5.5629 1970 5.2438 1971 4.4905 1972 4.3358 1973 4.5447 1974 6.0149 1975 4.084 1976 5.4372 1977 4.1456 1978 4.6779 1980 2.9571 1981 2.5944 1982 3.6183 1983 3.2796 1984 3.8631 1985 3.0479 1986 3.4604 1987 3.9111 1988 3.3616 1989 4.1277 1990 3.6406