Year Per 100,000 People 1955 6.835 1956 7.3051 1957 6.9977 1958 8.5962 1959 7.005 1960 8.365 1963 7.0002 1964 6.1689 1965 7.3091 1966 7.5836 1967 9.2549 1968 7.703 1969 7.1326 1970 3.5055 1971 5.5448 1972 6.3783 1973 3.7132 1974 5.8981 1975 4.3572 1976 4.8269 1977 4.4382 1978 2.7585 1980 3.5957 1981 4.3325 1982 5.8775 1983 2.4177 1984 4.7127 1985 3.5688 1986 5.7867 1987 4.9817 1988 5.6684 1989 7.2955 1990 6.8285