Year Number 2007 64.0776672363281 2008 52.9126205444336 2009 44.4976081848145 2010 40.1913871765137 2011 38.3886260986328 2012 34.5971565246582 2013 29.8578205108643 2014 50.480770111084 2015 48.0952377319336 2016 60.9523811340332 2017 50 2018 73.3333358764648 2019 73.3333358764648 2020 73.3333358764648 2021 71.9047622680664 2022 72.6415100097656