Year | Value | 2021 | 21.73038628 | 2020 | 14.17998705 | 2019 | 8.832308384 | 2017 | 1.30890698 | 2016 | 1.17711872 | 2015 | 1.083733116 | 2014 | 0.99 | 2013 | 0.9 | 2012 | 0.8 | 2011 | 0.7 | 2010 | 0.61 | 2009 | 0.54 | 2008 | 0.47 | 2007 | 0.41 | 2002 | 0.227090138 | 2001 | 0.157815289 | 2000 | 0.136711941 | 1999 | 0.025495028 | 1998 | 0.008774236 | 1997 | 0.009017718 |
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