| Year | Value | | 2021 | 98.08 | | 2020 | 96.06912594 | | 2019 | 95 | | 2018 | 95 | | 2017 | 94.86669164 | | 2016 | 90 | | 2015 | 71.2 | | 2014 | 68.77 | | 2013 | 64.5 | | 2012 | 60.27306504 | | 2011 | 56 | | 2010 | 53 | | 2009 | 49 | | 2008 | 46 | | 2007 | 44.68 | | 2006 | 42.18634916 | | 2005 | 36.46639195 | | 2004 | 29.71560414 | | 2003 | 19.59500322 | | 2002 | 15.32987986 | | 2001 | 12.91776908 | | 2000 | 8.996284534 | | 1999 | 7.671041206 | | 1998 | 6.284742844 | | 1997 | 4.831057905 | | 1996 | 3.303349927 | | 1995 | 1.017080166 |
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