Year Number 1996 60.7526893615723 1998 57.2192497253418 2000 52.6595726013184 2002 46.0317459106445 2003 49.2063484191895 2004 38.4236450195313 2005 40.9756088256836 2006 47.8048782348633 2007 48.0582542419434 2008 46.1165046691895 2009 48.8038291931152 2010 42.8571434020996 2011 43.1279602050781 2012 50.2369651794434 2013 53.0805702209473 2014 56.25 2015 53.8095245361328 2016 56.6666679382324 2017 55.238094329834 2018 58.0952377319336 2019 62.3809509277344 2020 58.5714302062988 2021 55.238094329834 2022 44.8113212585449