Year Number 1996 70.4301071166992 1998 71.1229934692383 2000 70.7446823120117 2002 82.539680480957 2003 74.6031723022461 2004 75.3694610595703 2005 69.7560958862305 2006 70.7317047119141 2007 69.9029159545898 2008 68.4466018676758 2009 66.9856491088867 2010 64.7619018554688 2011 59.2417068481445 2012 52.1327018737793 2013 52.6066360473633 2014 50.961540222168 2015 50 2016 46.1904754638672 2017 43.3333320617676 2018 43.8095245361328 2019 50 2020 52.3809509277344 2021 51.9047622680664 2022 58.9622650146484