| Year | Value | | 2022 | 133.08944347583 | | 2021 | 129.15857540559 | | 2020 | 126.98005135485 | | 2019 | 124.74049607573 | | 2018 | 122.04802742511 | | 2017 | 120.65711755565 | | 2016 | 120.11651656879 | | 2015 | 116.40261907364 | | 2014 | 112.82702026754 | | 2013 | 111.80718273912 | | 2012 | 106.85793338822 | | 2011 | 101.75958704274 | | 2010 | 100 | | 2009 | 99.610001928765 | | 2008 | 95.398169183821 | | 2007 | 90.891105646182 | | 2006 | 88.540664050619 | | 2005 | 83.10724223937 | | 2004 | 80.612690500743 | | 2003 | 78.700453575265 | | 2002 | 79.200880367817 | | 2001 | 75.87834975424 | | 2000 | 75.835889299114 | | 1999 | 76.510707246646 | | 1998 | 73.467202481037 | | 1996 | 64.339721073863 | | 1995 | 58.474112487229 | | 1994 | 53.441032110022 | | 1993 | 37.518361437929 | | 1992 | 35.757768995043 | | 1991 | 37.222654696876 | | 1990 | 37.858045078934 | | 1989 | 36.795017255968 | | 1988 | 37.468318758674 | | 1987 | 37.086174662544 | | 1986 | 36.922398621345 | | 1985 | 35.448414250557 |
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