Year Number 2006 17.3913040161133 2007 25.6038646697998 2008 54.8076934814453 2009 53.554500579834 2010 50.7108993530273 2011 50.2369651794434 2012 52.6066360473633 2013 48.8151664733887 2014 40.9523811340332 2015 38.5714302062988 2016 43.3333320617676 2017 29.5238094329834 2018 35.3773574829102 2019 31.6037731170654 2020 27.8301887512207 2021 29.7169818878174 2022 27.3584899902344