Year 2010 = 100 1960 3.53507529892313 1961 4.00800461886746 1962 4.38292242982093 1963 5.28310580339706 1964 7.11487429614868 1965 7.82569562813744 1966 8.51653403114301 1967 9.06368565886423 1968 9.80019932813475 1969 10.4605875535796 1970 11.4178650100369 1971 12.40368950793 1972 14.1136073178659 1973 15.0907032088313 1974 21.4418265021424 1975 27.1392907382225 1976 30.4256803907886 1977 36.1944638287974 1978 47.8250755989765 1979 53.9660386136311 1980 67.3645033728774 1981 84.7638985810654 1982 85.322167946034 1983 91.55617585485 1984 92.20749011398 1985 93.0448941614329 1986 91.6492207490114 1987 91.3080561370861 1988 94.611149879817 1989 95.9990695510584 1990 100 1991 105.381096379003 1992 107.606420097697