Year 2010 = 100 1960 43.2508250825082 1961 43.8696369636964 1962 44.3151815181518 1963 44.546204620462 1964 45.016501650165 1965 46.1056105610561 1966 46.9306930693069 1967 46.4851485148515 1968 46.1551155115512 1969 47.013201320132 1970 49.3151815181518 1971 51.4026402640264 1972 52.7640264026403 1973 56.2706270627063 1974 63.8036303630363 1975 66.7656765676567 1976 69.2244224422443 1977 71.1386138613861 1978 71.9554455445545 1979 75.4042904290429 1980 81.1056105610561 1981 87.4587458745874 1982 92.5907590759075 1983 93.9438943894389 1984 96.6584158415842 1985 99.0181518151815 1986 96.5181518151815 1987 94.1171617161716 1988 95.2970297029703 1989 98.3085808580858 1990 100 1991 102.376237623762 1992 103.770627062706 1993 103.722772277228