Year 2014-2016 = 100 1961 27.28 1962 27.83 1963 28.4 1964 28.95 1965 30.07 1966 30.64 1967 34.68 1968 35.8 1969 36.92 1970 38.04 1971 39.16 1972 41.4 1973 43.64 1974 46.2 1975 49.7 1976 39.8 1977 39.8 1978 46.2 1979 47.8 1980 50.22 1981 56.62 1982 62.49 1983 65.68 1984 59.29 1985 62.49 1986 66.51 1987 72.38 1988 75.58 1989 75.58 1990 78.78 1991 88.06 1992 92.02 1993 94.48 1994 94.5 1995 95.33 1996 94.53 1997 94.54 1998 94.56 1999 94.58 2000 94.81 2001 94.61 2002 94.62 2003 94.64 2004 94.56 2005 94.45 2006 94.68 2007 97.9 2008 100.15 2009 98.82 2010 100.69 2011 100.72 2012 100.74 2013 100.76 2014 99.66 2015 99.76 2016 100.58 2017 90.65 2018 87.99 2019 89.47 2020 89.29 2021 89.15 2022 89.43