Year Number 2008 41.3461532592773 2009 24.1706161499023 2010 4.7393364906311 2011 5.21327018737793 2012 6.16113758087158 2013 7.5829381942749 2014 22.8571434020996 2015 25.7142848968506 2016 22.8571434020996 2017 24.2857151031494 2018 12.7358493804932 2019 19.8113212585449 2020 21.698112487793 2021 28.301887512207 2022 22.1698112487793