Year Per 100,000 People 1961 0.2679 1963 0.459 1964 0.5265 1977 2.4432 1978 2.2792 1979 2.0577 1980 2.034 1982 3.5658 1984 3.1533 1985 2.7643 1986 3.0995 1987 2.7057 1988 2.9781 1991 3.5021