Year | Value | 2021 | 76.158222967072 | 2020 | 73.913015842802 | 2019 | 68.750809520966 | 2018 | 63.604152277329 | 2017 | 60.262433381166 | 2016 | 57.544357786499 | 2015 | 54.401989826864 | 2014 | 48.810332312065 | 2013 | 46.262546044127 | 2012 | 43.199846762631 | 2011 | 39.370741145082 | 2010 | 34.735409349244 | 2009 | 31.070802481654 | 2008 | 26.541865002218 | 2007 | 23.732957209895 | 2006 | 20.756285404301 | 2005 | 16.614691758461 | 2004 | 14.398612434066 | 2003 | 11.263014702287 | 2002 | 8.8465905032673 | 2001 | 5.6177851272522 | 2000 | 3.8756083069587 | 1999 | 2.0488389009337 | 1998 | 1.2292742897466 | 1997 | 0.60910928793154 | 1996 | 0.31010797225547 | 1995 | 0.10557495504625 | 1994 | 0.043305332383678 | 1993 | 0.021121829113169 | 1992 | 0.0096169986371861 | 1991 | 0.002211216469872 |
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