Year Per 100,000 People 1964 18.4129 1968 19.6784 1969 15.9214 1970 17.431 1971 22.8085 1972 22.7998 1973 29.3466 1974 29.0731 1975 27.1384 1976 31.1563 1977 27.219 1992 29.0369 1993 28.7867 1994 27.7444 1995 27.5015 1996 23.0838