Year 2010 = 100 1960 63.4266379571314 1961 62.9960012305844 1962 61.5195324517426 1963 66.4308417920633 1964 67.7483851121739 1965 65.6464677533548 1966 65.3388700909936 1967 70.1220137390653 1968 66.8153388700404 1969 68.5635189170057 1970 75.2127550497033 1971 80.0266584641034 1972 76.9404285858514 1973 80.4983082127463 1974 90.5721316517704 1975 100 1976 111.206808161421 1977 118.62503844956