Year Number 1996 87.2340393066406 1998 91.4893646240234 2000 76.1904754638672 2002 86.7724838256836 2003 82.4120635986328 2004 75.728157043457 2005 70.3883514404297 2006 60.8695640563965 2007 60.386474609375 2008 65.3846130371094 2009 65.4028472900391 2010 62.5592422485352 2011 63.5071105957031 2012 61.6113739013672 2013 64.4549789428711 2014 65.7142868041992 2015 64.7619018554688 2016 63.3333320617676 2017 63.3333320617676 2018 60.8490562438965 2019 60.8490562438965 2020 72.6415100097656 2021 69.8113174438477 2022 73.5849075317383