Year 2014-2016 = 100 1961 24.27 1962 25.73 1963 27.11 1964 25.15 1965 27.48 1966 29.34 1967 29.72 1968 33.15 1969 33.95 1970 35.25 1971 30.46 1972 25.05 1973 24.85 1974 35.04 1975 37.89 1976 35.93 1977 34.09 1978 33.83 1979 35.53 1980 37.87 1981 42.05 1982 41.47 1983 40.12 1984 38.44 1985 38.16 1986 39.65 1987 40.99 1988 43.65 1989 47.31 1990 51.47 1991 51.81 1992 52.83 1993 58.1 1994 62.93 1995 67.01 1996 68.99 1997 72 1998 74.37 1999 72.6 2000 74.88 2001 79.52 2002 78.36 2003 78.53 2004 83.97 2005 87.38 2006 95.76 2007 96.74 2008 100.14 2009 95.81 2010 96.35 2011 99.13 2012 103.49 2013 99.09 2014 99.15 2015 100.46 2016 100.39 2017 96.26 2018 101.8 2019 102.53 2020 106.96 2021 105.72 2022 103.4