Year Per 100,000 People 1955 4.8182 1956 5.1534 1957 4.9486 1958 5.1271 1959 4.777 1960 5.1891 1963 4.4279 1964 4.5775 1965 3.868 1966 4.6237 1967 5.7153 1968 4.6373 1969 3.8192 1970 3.5544 1971 3.5754 1972 3.9898 1973 3.2222 1974 4.1058 1975 2.9552 1976 2.9848 1977 2.8117 1978 1.9909 1980 2.6901 1981 3.2489 1982 3.152 1983 2.2456 1984 2.5084 1985 2.6694 1986 2.9022 1987 3.1259 1988 3.4575 1989 4.5858 1990 4.2852