Year | Value | 2021 | 83.608834230864 | 2020 | 79.89465598212 | 2019 | 76.869909856846 | 2018 | 72.751170134665 | 2017 | 66.298128143946 | 2016 | 62.404878715078 | 2015 | 58.603263301908 | 2014 | 56.714516140368 | 2013 | 52.678385718383 | 2012 | 49.683473596935 | 2011 | 43.885683557625 | 2010 | 37.598656913936 | 2009 | 32.053589238442 | 2008 | 25.350971127799 | 2007 | 19.893802753713 | 2006 | 14.422095640026 | 2005 | 11.89399929525 | 2004 | 10.449107525907 | 2003 | 7.1990164684115 | 2002 | 4.9289376510154 | 2001 | 2.7798765901897 | 2000 | 1.8717900807596 | 1999 | 1.0064637582031 | 1998 | 0.57448580765363 | 1997 | 0.35478205749421 | 1996 | 0.18572469992293 | 1995 | 0.084857562995541 | 1994 | 0.032791865711001 | 1993 | 0.0070656412155432 | 1992 | 0.00027822561163998 |
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