Year Per 100,000 People 1981 6.2377 1982 5.2625 1985 5.4314 1986 6.6168 1987 5.3744 1988 6.6732 1989 6.3077 1990 7.6239 1991 14.6876 1992 13.2439 1993 19.517 1994 5.6896 1995 4.589 1996 3.7111 1997 4.4256 1998 3.9844