Year | Value | 2019 | 85.202564644593 | 2018 | 83.676504949119 | 2017 | 79.831357843137 | 2016 | 67.952510948685 | 2015 | 63.836438150408 | 2014 | 21.743575433928 | 2013 | 22.785642681445 | 2012 | 26.846581239363 | 2011 | 25.495093624654 | 2010 | 32.363150547126 | 2009 | 23.938094611522 | 2008 | 23.248993250891 |
|