Year Per 100,000 People 1968 6.9708 1969 7.6493 1978 8.2683 1979 7.9294 1980 7.9789 1981 8.26 1982 9.0396 1983 8.5873 1984 8.5483 1985 8.2348 1986 8.3098 1987 9.223 1988 8.7533 1989 8.5186 1990 7.7861