Year Per 100,000 People 1966 18.9981 1967 24.4061 1968 24.0922 1969 24.1908 1970 22.712 1977 18.2248 1978 18.9749 1979 16.7732 1980 19.3328 1981 19.8452 1982 18.9388 1983 18.9083 1984 18.5053 1985 20.4355 1986 21.7892 1987 21.6863 1988 21.6669 1989 20.2086 1990 19.1879 1991 16.6212 1992 16.3089 1993 18.1761 1994 15.7679 1995 15.8225 1996 14.4591