| Year | Value | | 2024 | 105.38884732404 | | 2023 | 106.05710623413 | | 2022 | 75.998659080547 | | 2021 | 75.156390831344 | | 2020 | 71.465438075613 | | 2019 | 68.429044354264 | | 2018 | 102.22257318842 | | 2017 | 105.71235641045 | | 2016 | 111.33188224279 | | 2015 | 118.42964965641 | | 2014 | 112.81177103894 | | 2013 | 114.68005183043 | | 2012 | 123.83566443776 | | 2011 | 119.86497980013 | | 2010 | 123.84262621651 | | 2009 | 122.82397952589 | | 2008 | 126.58442734269 | | 2007 | 108.6028613249 | | 2006 | 110.90558589985 | | 2005 | 108.94368948899 | | 2004 | 107.10166135835 | | 2003 | 105.65831951837 | | 2002 | 103.14014420236 | | 2001 | 97.983261438631 | | 2000 | 97.751466029209 | | 1999 | 96.105079064344 | | 1998 | 101.72514734007 | | 1997 | 107.9974220764 | | 1996 | 98.884019865615 | | 1995 | 102.50527055516 | | 1994 | 101.91826522102 | | 1993 | 101.72446610073 | | 1992 | 109.25610658771 | | 1991 | 103.28186444599 | | 1990 | 99.929057035081 | | 1989 | 98.380858375212 | | 1988 | 96.610462981313 | | 1987 | 97.242952535367 | | 1986 | 97.467165263881 | | 1985 | 99.794424925602 | | 1984 | 100.61841500969 | | 1983 | 105.47088272165 | | 1982 | 107.39889279726 | | 1981 | 108.88258390839 | | 1980 | 104.65097514576 | | 1979 | 102.82002597645 | | 1978 | 98.862207135053 | | 1977 | 99.155445165995 | | 1976 | 98.090817558098 | | 1975 | 100.00000228765 |
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