Year Per 100,000 People 1971 6.0582 1975 10.3073 1976 2.1764 1977 8.059 1978 1.2062 1979 4.9479 1980 4.4596 1981 5.0755 1982 11.6137 1984 8.3597 1985 6.8942 1990 3.0149