Year 2014-2016 = 100 1961 29.42 1962 29.64 1963 31.14 1964 30.27 1965 31.25 1966 31.75 1967 31.98 1968 31.84 1969 32.76 1970 32.82 1971 34.28 1972 36.83 1973 39.53 1974 44.56 1975 44.5 1976 53.73 1977 50.49 1978 55.54 1979 55.31 1980 54.49 1981 48.04 1982 45.98 1983 43.04 1984 46.66 1985 50.29 1986 52.13 1987 50.86 1988 55.34 1989 60.28 1990 59.31 1991 61.8 1992 62.11 1993 64.63 1994 64.73 1995 63.87 1996 64.5 1997 74.04 1998 72.43 1999 72.67 2000 83.85 2001 79.32 2002 87.62 2003 83 2004 85.82 2005 93.29 2006 97.5 2007 100.49 2008 98.87 2009 100.8 2010 99.19 2011 95.15 2012 97.2 2013 94.96 2014 97.53 2015 99.39 2016 103.08 2017 99.58 2018 98.76 2019 96.68 2020 93.17 2021 94.69 2022 98.89