Year Number 2008 26.2135925292969 2009 22.9665069580078 2010 20.0956935882568 2011 21.3270149230957 2012 17.5355453491211 2013 17.0616111755371 2014 25 2015 50.476188659668 2016 59.523811340332 2017 53.3333320617676 2018 60 2019 67.1428604125977 2020 71.9047622680664 2021 69.0476226806641 2022 66.5094375610352