Year Number 1996 51.0638313293457 1998 39.361701965332 2000 50.2645492553711 2002 22.7513236999512 2003 35.1758804321289 2004 26.2135925292969 2005 44.1747589111328 2006 45.8937187194824 2007 46.8599052429199 2008 40.8653831481934 2009 36.9668235778809 2010 42.6540298461914 2011 52.1327018737793 2012 49.2891006469727 2013 48.3412322998047 2014 45.7142868041992 2015 46.1904754638672 2016 52.8571434020996 2017 53.3333320617676 2018 47.1698112487793 2019 43.8679237365723 2020 45.2830200195313 2021 47.6415100097656 2022 46.698112487793