Year | Value | 2020 | 57.084200807859 | 2019 | 47.020372131335 | 2018 | 55.338128619426 | 2017 | 65.065005113666 | 2016 | 69.71349901294 | 2015 | 67.618136686943 | 2014 | 60.287419300971 | 2013 | 32.289346845678 | 2012 | 28.958615471497 | 2011 | 26.480820173469 | 2010 | 28.866636622835 | 2009 | 23.990034232906 | 2008 | 13.229954209598 | 2007 | 11.815203313514 | 2006 | 14.255927182851 | 2005 | 17.087763264637 | 2004 | 23.885507797642 | 2003 | 27.954598619098 | 2002 | 32.343788705806 | 2001 | 35.340215461111 | 2000 | 43.729787427326 | 1999 | 60.976449303139 |
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