Year Per 100,000 People 1952 30.3034 1953 31.8539 1954 32.3074 1955 33.0494 1956 32.7056 1957 31.8651 1958 31.7434 1959 31.4135 1960 32.3715 1961 32.1058 1962 30.2011 1963 32.3194 1964 33.5495 1965 32.4028 1966 34.318 1967 36.0247 1968 33.8182 1969 33.5727 1970 34.4164 1971 33.1998 1972 31.5998 1973 32.8817 1974 32.7229 1975 31.8067 1976 32.1331 1977 32.855 1978 31.1723 1979 30.9223 1980 30.7401 1981 30.5573 1982 30.8001 1983 29.7149 1984 28.0602 1985 28.279 1986 25.974 1987 25.8429 1988 23.4105 1989 22.091 1990 20.6433