Year | Value | 2020 | 58.716185073233 | 2019 | 48.327269600357 | 2018 | 56.905950674971 | 2017 | 66.734646506288 | 2016 | 71.8095454494 | 2015 | 70.258837621898 | 2014 | 63.665319188488 | 2013 | 35.631399586381 | 2012 | 32.445911715199 | 2011 | 26.480820173469 | 2010 | 28.866636622835 | 2009 | 23.990034232906 | 2008 | 13.229954209598 | 2000 | 43.729787427326 | 1999 | 60.976449303139 |
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