| Year | Value | | 2022 | 90.46084106 | | 2021 | 88.64083466 | | 2020 | 84.77115202 | | 2019 | 80.37169361 | | 2018 | 76.07436064 | | 2017 | 76.75054712 | | 2016 | 79.25941213 | | 2015 | 72.83473703 | | 2014 | 75.65319745 | | 2013 | 72.6439 | | 2012 | 70.57999815 | | 2011 | 68.01998789 | | 2010 | 65 | | 2009 | 62 | | 2008 | 61 | | 2007 | 53.3 | | 2006 | 47.06 | | 2005 | 38.97 | | 2004 | 27.74 | | 2003 | 21.63 | | 2002 | 16.67 | | 2001 | 14.5285543 | | 2000 | 6.999676351 | | 1999 | 5.857840749 | | 1998 | 3.894643278 | | 1997 | 1.942449872 | | 1996 | 0.969239536 | | 1995 | 0.677486054 | | 1994 | 0.483580975 | | 1993 | 0.193414395 | | 1992 | 0.048353421 | | 1991 | 0.00338263 |
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