Year 2014-2016 = 100 1961 2.78 1962 2.85 1963 2.84 1964 2.79 1965 3.37 1966 3.26 1967 3.44 1968 2.95 1969 3.48 1970 3.78 1971 3.24 1972 3.69 1973 4.39 1974 4.53 1975 6.52 1976 7.36 1977 7.76 1978 9.05 1979 10.86 1980 12.25 1981 9.51 1982 12.85 1983 11.64 1984 13.81 1985 15.81 1986 14.63 1987 19.58 1988 12.26 1989 13.41 1990 12.75 1991 15.26 1992 17.78 1993 19.75 1994 14 1995 13.28 1996 14.08 1997 21.94 1998 20.37 1999 22.01 2000 26.43 2001 21.34 2002 21.92 2003 19.84 2004 17.35 2005 19.01 2006 19.78 2007 22.09 2008 22.47 2009 28.01 2010 24.39 2011 40.1 2012 63.26 2013 86.43 2014 81.31 2015 98.77 2016 119.93 2017 147.84 2018 139.56 2019 140.73 2020 129.89 2021 128.38 2022 134.41