| Year | Value | | 2021 | 0.358154 | | 2020 | 0.510072 | | 2019 | 0.318844 | | 2018 | 0.690916 | | 2017 | 0.530672 | | 2016 | 0.65910068 | | 2015 | 0.538041372 | | 2014 | 0.922884 | | 2013 | 0.635292 | | 2012 | 0.471 | | 2011 | 0.48370582218722 | | 2010 | 0.42193773166349 | | 2009 | 0.448 | | 2008 | 0.264 | | 2007 | 0.279 | | 2006 | 0.263 | | 2005 | 0.253 | | 2004 | 0.246 | | 2003 | 0.21 | | 2002 | 0.2 |
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