Year Number 1996 82.4468078613281 1998 59.042552947998 2000 90.476188659668 2002 59.7883605957031 2003 91.9598007202148 2004 92.7184448242188 2005 79.6116485595703 2006 74.3961334228516 2007 67.6328506469727 2008 69.2307662963867 2009 70.1421813964844 2010 72.9857788085938 2011 72.511848449707 2012 74.407585144043 2013 73.459716796875 2014 75.2380981445313 2015 73.3333358764648 2016 86.1904754638672 2017 80.9523773193359 2018 83.9622650146484 2019 77.8301849365234 2020 75 2021 74.0566024780273 2022 77.8301849365234