Year Per 100,000 People 1963 1.3125 1964 1.4168 1965 1.5549 1966 1.2841 1967 1.3056 1968 1.338 1969 1.9965 1970 2.269 1971 1.7525 1972 1.9803 1973 1.1902 1974 2.0834 1975 2.1205 1976 2.4011 1978 2.8424 1981 2.458