| Year | Value | | 2022 | 104.5034422439 | | 2021 | 101.09264357684 | | 2020 | 98.532374345635 | | 2019 | 100.83521529306 | | 2018 | 102.12480078113 | | 2017 | 103.34371876374 | | 2016 | 104.84764819876 | | 2015 | 104.78663002899 | | 2014 | 104.8555760996 | | 2013 | 105.14134313389 | | 2012 | 104.98941373906 | | 2011 | 105.48250100103 | | 2010 | 105.14839988405 | | 2009 | 103.76192141995 | | 2008 | 104.65525245668 | | 2007 | 102.34277196825 | | 2006 | 101.73052664212 | | 2005 | 102.82511956859 | | 2004 | 101.98123683151 | | 2003 | 102.0283997894 | | 2002 | 99.905762914165 | | 2001 | 98.886136549488 | | 2000 | 100.31113115662 | | 1999 | 98.685548480566 | | 1998 | 98.904554782278 | | 1997 | 97.878169307877 | | 1996 | 96.250596641198 | | 1995 | 96.152524187989 | | 1994 | 103.55189706823 | | 1993 | 102.27542536138 | | 1992 | 105.16437670107 | | 1991 | 103.33845303941 | | 1990 | 101.66814119802 | | 1989 | 100.77724852284 | | 1988 | 99.442178800287 | | 1987 | 89.257063954781 | | 1986 | 92.44397948734 | | 1985 | 89.69577542367 | | 1984 | 87.857694596919 | | 1983 | 86.193775302881 | | 1982 | 89.385256267638 | | 1981 | 97.146379418753 | | 1980 | 96.890550822464 | | 1979 | 101.2463559322 | | 1978 | 100.5858237056 | | 1977 | 99.917312060573 | | 1976 | 101.37509846827 | | 1975 | 102.73016363636 | | 1974 | 102.1292 | | 1973 | 101.03706222865 | | 1972 | 100.72132743363 | | 1971 | 101.08112244898 | | 1970 | 101.96554054054 | | 1969 | 99.524975369458 | | 1968 | 100.33367847411 | | 1967 | 99.984096385542 | | 1966 | 99.182368421053 | | 1965 | 99.682564102564 | | 1964 | 100.01123505976 | | 1963 | 99.593679245283 | | 1962 | 99.876842105263 | | 1961 | 100.15372881356 | | 1960 | 101.23073619632 |
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