Year Per 100,000 People 1955 12.6533 1956 15.0567 1957 11.6386 1958 11.6055 1959 12.3631 1960 12.8923 1963 10.5134 1964 8.8916 1965 11.2894 1966 11.0155 1967 10.4959 1968 10.5192 1969 10.7947 1970 9.6528 1971 10.5443 1972 11.3376 1973 11.6953 1974 11.6016 1975 9.9293 1976 10.5855 1977 11.2821 1978 10.1787 1980 8.9709 1981 8.4839 1982 10.3672 1983 10.4825 1984 10.5976 1985 9.0115 1986 7.9513 1987 7.9039 1988 8.2878 1989 10.6046 1990 9.5152