| Year | Value | | 2021 | 88.13031937 | | 2020 | 84.12036305 | | 2019 | 84.12036305 | | 2018 | 64.80386519 | | 2017 | 61.76221201 | | 2016 | 58.27123642 | | 2015 | 57.07999935 | | 2014 | 56.8 | | 2013 | 56 | | 2012 | 55.41605319 | | 2011 | 46.1074826 | | 2010 | 52 | | 2009 | 41.3 | | 2008 | 33.1 | | 2007 | 21.5 | | 2006 | 19.77119157 | | 2005 | 15.08444452 | | 2004 | 11.60793477 | | 2003 | 3.353366681 | | 2002 | 2.373253192 | | 2001 | 1.371438101 | | 2000 | 0.693791245 | | 1999 | 0.175595345 | | 1998 | 0.142300767 | | 1997 | 0.021635203 | | 1996 | 0.005675444 | | 1995 | 0.003710492 |
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