Year Number 1996 50.5376358032227 1998 50.8021392822266 2000 52.6595726013184 2002 70.8994674682617 2003 58.7301597595215 2004 58.1280784606934 2005 57.5609741210938 2006 52.1951217651367 2007 51.9417457580566 2008 53.3980598449707 2009 54.0669860839844 2010 53.3333320617676 2011 55.4502372741699 2012 60.1895751953125 2013 61.6113739013672 2014 56.25 2015 51.9047622680664 2016 44.761905670166 2017 41.9047622680664 2018 38.5714302062988 2019 40.9523811340332 2020 38.5714302062988 2021 49.523811340332 2022 49.5283012390137