Year | Value | 2020 | 54.62080268094 | 2019 | 51.447254164606 | 2018 | 49.55363277179 | 2017 | 49.883507474807 | 2016 | 47.110818261496 | 2015 | 46.272544106477 | 2014 | 45.952008753047 | 2013 | 43.787489644855 | 2012 | 40.78076310092 | 2011 | 46.989011295705 | 2010 | 50.460380630424 | 2009 | 62.521750023432 | 2008 | 65.679684227919 | 2007 | 66.830775044685 | 2006 | 62.944581604295 | 2005 | 64.215381724522 | 2004 | 69.508491614246 | 2003 | 68.324104195225 | 2002 | 71.519181948921 | 2001 | 69.043523610218 |
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