Year | Value | 2021 | 34.49 | 2020 | 27.85653831 | 2019 | 22.31109004 | 2018 | 21.4 | 2017 | 18.9 | 2016 | 14 | 2015 | 10.33 | 2014 | 7 | 2013 | 3.5 | 2012 | 2.8 | 2011 | 2.2 | 2010 | 2 | 2009 | 1.8 | 2008 | 1.57 | 2007 | 0.81 | 2006 | 0.729627281 | 2005 | 0.507063136 | 2004 | 0.43281964 | 2003 | 0.310364443 | 2002 | 0.227045578 | 2001 | 0.185897413 | 2000 | 0.142545755 | 1999 | 0.060909873 | 1998 | 0.019793888 | 1997 | 0.010085919 | 1996 | 0.002055228 |
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