Year Per 100,000 People 1955 10.4388 1956 12.5351 1957 10.2297 1958 10.092 1959 9.6332 1960 6.9954 1963 11.4089 1964 10.8967 1965 11.2941 1966 12.2136 1967 9.785 1968 9.9729 1969 10.4608 1970 11.3427 1971 10.7785 1972 11.6903 1973 11.6085 1974 9.4575 1975 11.731 1976 8.6981 1977 7.4082 1978 11.3862 1980 19.982 1981 20.0439 1982 16.9487 1983 15.1593 1984 13.227 1985 12.8873 1986 13.7103 1987 14.7991 1988 17.813 1989 23.3942 1990 17.169