Year Per 100,000 People 1979 15.98 1980 17.9226 1981 22.5726 1982 18.884 1983 20.4175 1984 21.7236 1985 21.2428 1986 22.7001 1987 20.3007 1988 20.1829 1989 20.0405 1990 23.9891 1991 22.6949 1992 15.4926