Year Per 100,000 People 1963 2.8188 1964 2.9129 1965 3.3747 1966 1.8961 1967 2.6612 1968 3.7456 1969 4.8972 1970 4.0994 1971 3.3966 1972 3.5007 1973 2.4842 1974 3.5985 1975 4.6204 1976 4.9676 1978 6.6741 1981 5.0743