| Year | Value | | 2021 | 85.999997 | | 2020 | 75.44769493 | | 2019 | 70.08467395 | | 2018 | 65.2 | | 2017 | 64.5 | | 2016 | 56.15 | | 2015 | 54.22 | | 2014 | 46.2 | | 2013 | 41.4 | | 2012 | 37 | | 2011 | 34.9 | | 2010 | 27.2 | | 2009 | 26 | | 2008 | 23 | | 2007 | 20 | | 2006 | 13.86710879 | | 2005 | 12.93285205 | | 2004 | 11.65874137 | | 2003 | 8.466005016 | | 2002 | 6.025532412 | | 2001 | 4.705719581 | | 2000 | 2.623275422 | | 1999 | 2.526965353 | | 1998 | 1.305888264 | | 1997 | 0.599341106 | | 1996 | 0.044938549 | | 1995 | 0.02323392 |
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