Year Per 100,000 People 1964 13.9577 1968 13.957 1969 16.2281 1970 17.3585 1971 12.9942 1972 12.0961 1973 12.2165 1974 12.6126 1975 13.8732 1976 14.3584 1977 18.051 1992 21.9059 1993 19.33 1994 20.894 1995 19.6842 1996 18.3011