Year Number 1996 65.2173919677734 1998 70.6521759033203 2000 64.1304321289063 2002 60.5405387878418 2003 57.8378372192383 2004 59.7014923095703 2005 52.9411773681641 2006 54.4117660522461 2007 52.4271850585938 2008 53.3980598449707 2009 54.0669860839844 2010 53.5885162353516 2011 54.028434753418 2012 52.6066360473633 2013 53.0805702209473 2014 52.8846168518066 2015 51.4285697937012 2016 53.3333320617676 2017 53.8095245361328 2018 51.9047622680664 2019 46.6666679382324 2020 43.8095245361328 2021 44.761905670166 2022 43.8679237365723