Year Number 1996 27.1739139556885 1998 29.8913040161133 2000 53.8043479919434 2002 44.3243255615234 2003 47.5675659179688 2004 35.3233833312988 2005 43.1372566223145 2006 45.0980377197266 2007 41.7475738525391 2008 50 2009 52.1531105041504 2010 48.3253593444824 2011 53.554500579834 2012 53.0805702209473 2013 47.8672981262207 2014 46.1538467407227 2015 47.6190490722656 2016 46.1904754638672 2017 49.523811340332 2018 50.9523811340332 2019 51.4285697937012 2020 57.6190490722656 2021 60.476188659668 2022 60.8490562438965