Year Per 100,000 People 1961 3.8949 1963 6.4603 1964 3.9029 1965 5.1463 1966 5.247 1967 5.6284 1968 6.3058 1969 7.7172 1970 8.8811 1971 7.6967 1972 7.4097 1973 8.7385 1974 10.1807 1975 9.5477 1977 10.7458 1978 10.9991 1979 10.1682 1980 10.5672 1982 8.5864 1984 8.0768 1985 6.8921 1986 7.4464 1987 8.2866 1988 8.9172 1991 9.1626