Year Per 100,000 People 1955 7.8327 1956 8.3889 1957 8.5323 1958 8.2375 1959 7.9305 1960 8.1662 1963 7.7833 1964 7.2475 1965 6.0601 1966 7.1554 1967 8.7554 1968 7.4625 1969 6.1268 1970 5.8404 1971 6.3283 1972 6.7566 1973 5.6959 1974 6.6035 1975 5.1119 1976 4.7923 1977 3.9088 1978 3.2644 1980 3.7534 1981 4.8855 1982 4.7718 1983 3.3299 1984 4.1367 1985 4.763 1986 4.4839 1987 4.1172 1988 5.3241 1989 7.4139 1990 6.8698