Year | Value | 2021 | 76.188525614817 | 2020 | 73.948687268556 | 2019 | 68.694740159578 | 2018 | 63.559104279306 | 2017 | 60.238393447856 | 2016 | 57.716556046535 | 2015 | 54.636154734816 | 2014 | 49.024358498652 | 2013 | 46.437297546774 | 2012 | 43.424158182415 | 2011 | 39.73395419279 | 2010 | 35.01074087104 | 2009 | 31.309832308028 | 2008 | 26.710784520403 | 2007 | 23.926346384983 | 2006 | 20.896157398355 | 2005 | 16.681180751341 | 2004 | 14.442494970116 | 2003 | 11.304695023785 | 2002 | 8.869886677354 | 2001 | 5.6295840425014 | 2000 | 3.8920368142382 | 1999 | 2.0591171600321 | 1998 | 1.2380291500166 | 1997 | 0.61391698904408 | 1996 | 0.31452784862713 | 1995 | 0.10647358329767 | 1994 | 0.044326317137736 | 1993 | 0.021837412587394 | 1992 | 0.0099465173346441 | 1991 | 0.0022877950252359 |
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