Year 2010 = 100 1960 19.351830136064 1961 20.9335601994675 1962 22.2529179775036 1963 20.8473521628719 1964 19.5917133683593 1965 20.2101623268137 1966 23.0775165887386 1967 24.8354109009889 1968 23.6922173716497 1969 24.4793342279394 1970 23.9695823591152 1971 23.0737684132328 1972 24.816670023385 1973 34.4232438450098 1974 43.4338577609151 1975 42.3056569335616 1976 44.9781060691857 1977 45.832690084467 1978 48.6850516444063 1979 57.6694283316961 1980 66.7587539331479 1981 62.3134177834377 1982 56.3838041332121 1983 60.405596451031 1984 58.5384877882318 1985 58.5238629161995 1986 59.7816019109833 1987 63.1160727343636 1988 69.6387656608005 1989 70.7795056793253 1990 70.3505094330424 1991 71.2231267976405 1992 72.7002388729098 1993 71.2133768829522 1994 79.3155559888851 1995 92.1854433773704 1996 93.116560230098 1997 92.5169404767708 1998 111.032028469751 1999 98.1718909959538 2000 100