Year 2010 = 100 1966 0.0215474401910396 1967 0.0212996446288426 1968 0.0231581113451582 1969 0.0253667239647936 1970 0.024747235059409 1971 0.0232065930856419 1972 0.0243917022961491 1973 0.0297624017638196 1974 0.0335816855376275 1975 0.031346138617861 1976 0.037390195591286 1977 0.0455997703042337 1978 0.0530821189104645 1979 0.0659836487249033 1980 0.0747965517629846 1981 0.0758685369124888 1982 0.0809106379171921 1983 0.100411071290083 1984 0.128460451558984 1985 0.189100335116079 1986 0.408302444180009 1987 0.75294836317564 1988 0.839967700387154 1989 1.54719778233746 1990 3.33539829635164 1991 6.39430522703191 1992 14.1490511854055 1993 34.0738506191388 1994 58.1304686729847 1995 100