Year Number 2004 73.6318435668945 2005 70.5882339477539 2006 68.7804870605469 2007 54.8543701171875 2008 57.7669906616211 2009 62.2009582519531 2010 61.7224884033203 2011 45.0236968994141 2012 51.6587677001953 2013 53.0805702209473 2014 57.211540222168 2015 70 2016 71.9047622680664 2017 82.3809509277344 2018 75.7142868041992 2019 73.8095245361328 2020 82.3809509277344 2021 80.476188659668 2022 80.1886825561523