Year Per 100,000 People 1970 5.9449 1971 7.1757 1972 5.085 1973 5.2644 1974 5.5051 1975 5.7815 1976 5.6925 1977 5.9351 1992 8.5452 1993 10.4246 1994 11.5038 1995 10.7445 1996 9.3922