| Year | Value | | 2022 | 56.7328 | | 2021 | 55.6004 | | 2020 | 53.6508 | | 2019 | 52.3059 | | 2017 | 32.9003 | | 2016 | 32.3985 | | 2015 | 6.43319 | | 2014 | 14 | | 2013 | 6 | | 2012 | 4.94 | | 2011 | 3.1 | | 2010 | 1.26 | | 2009 | 0.53 | | 2008 | 0.51 | | 2007 | 0.49 | | 2006 | 0.468357 | | 2005 | 0.317322 | | 2004 | 0.300437 | | 2003 | 0.26057 | | 2002 | 0.226983 | | 2001 | 0.0769561 | | 2000 | 0.0470226 | | 1999 | 0.031969578 | | 1998 | 0.016324986 | | 1997 | 0.005844911 |
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