Year Number 1996 65.760871887207 1998 73.9130401611328 2000 72.8260879516602 2002 63.2432441711426 2003 65.9459457397461 2004 68.6567153930664 2005 60.294116973877 2006 70.0980377197266 2007 70.3883514404297 2008 69.9029159545898 2009 69.3779907226563 2010 66.9856491088867 2011 70.6161117553711 2012 67.7725143432617 2013 66.3507080078125 2014 65.3846130371094 2015 65.7142868041992 2016 65.7142868041992 2017 66.1904754638672 2018 63.8095245361328 2019 63.8095245361328 2020 71.9047622680664 2021 67.1428604125977 2022 68.3962249755859