| Year | Value | | 2021 | 86.58903046 | | 2020 | 83.1038168 | | 2019 | 79.7588832 | | 2018 | 80.9 | | 2017 | 78.18077489 | | 2016 | 76.11 | | 2015 | 74 | | 2014 | 73 | | 2013 | 70.5 | | 2012 | 61.24978572 | | 2011 | 52 | | 2010 | 43.68 | | 2009 | 30.14 | | 2008 | 22.53 | | 2007 | 18.74 | | 2006 | 15 | | 2005 | 10.14 | | 2004 | 9 | | 2003 | 8 | | 2002 | 7 | | 2001 | 6.783219775 | | 2000 | 7.952743736 | | 1999 | 5.376809498 | | 1998 | 2.722352199 | | 1997 | 1.241079739 | | 1996 | 0.140166939 | | 1995 | 0.071617991 |
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