Year Per 100,000 People 1958 39.4469 1959 42.0903 1969 13.84 1970 23.3839 1971 21.0101 1972 19.4622 1973 17.2457 1981 23.0488 1982 23.6539 1983 22.8723 1985 23.8613 1986 24.697 1987 24.2306 1988 22.5515 1989 22.0215 1990 20.3883 1991 20.2293 1992 21.9682 1993 20.7628 1994 19.8195 1995 18.9796