| Year | Value | | 2021 | 87.65996651 | | 2020 | 84.8767809 | | 2019 | 77.18669679 | | 2018 | 68.9 | | 2017 | 65.78 | | 2016 | 49.42 | | 2015 | 42.5 | | 2014 | 37.4 | | 2013 | 35.2 | | 2012 | 33.74235675 | | 2011 | 28 | | 2010 | 20 | | 2009 | 17 | | 2008 | 13 | | 2007 | 10.89783105 | | 2006 | 9.6000384 | | 2005 | 8.453636634 | | 2004 | 7.412943485 | | 2003 | 6.725434738 | | 2002 | 6.1526497 | | 2001 | 1.857978594 | | 2000 | 1.496854734 | | 1999 | 0.942462063 | | 1998 | 0.633167865 | | 1997 | 0.223454842 | | 1996 | 0.064437142 | | 1995 | 0.009115343 | | 1994 | 0.007907399 | | 1993 | 0.006678447 |
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