Year Per 100,000 People 1968 5.3284 1969 4.8961 1978 3.2855 1979 2.7987 1980 2.2895 1981 2.9943 1982 2.7012 1983 2.4745 1984 2.7947 1985 2.4681 1986 2.1151 1987 2.3586 1988 2.5286 1989 2.5954 1990 2.3134