| Year | Value | | 2019 | 92.617293328954 | | 2018 | 84.416612174074 | | 2017 | 84.702047824397 | | 2016 | 89.775064223023 | | 2015 | 85.561111524459 | | 2014 | 72.452621474642 | | 2013 | 71.58665160097 | | 2012 | 72.865438824213 | | 2011 | 64.186721321525 | | 2010 | 73.151358604055 | | 2009 | 73.527657235095 | | 2008 | 50.239306240867 | | 2007 | 56.841201912613 | | 2006 | 53.881481475864 | | 2005 | 56.189705548491 |
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