Year Per 100,000 People 1964 10.1037 1968 4.5172 1969 6.148 1970 7.5141 1971 7.4141 1972 5.4858 1973 6.284 1974 6.2742 1975 7.1303 1976 5.9065 1977 5.9553 1992 7.6183 1993 9.5515 1994 11.9332 1995 10.5717 1996 9.326