Year Per 100,000 People 1980 19.4747 1981 20.1372 1982 18.9635 1983 17.6287 1984 16.2962 1985 15.6573 1986 15.5546 1987 15.4392 1988 17.7081 1989 21.1376 1990 23.2135 1991 25.9446 1992 23.7472 1993 23.2613 1994 21.6203 1995 19.9037 1996 18.3077 1997 17.0202 1998 18.1307