Year Number 1996 45.1086959838867 1998 46.7391319274902 2000 41.3043479919434 2002 40 2003 32.4324340820313 2004 48.756217956543 2005 24.5098037719727 2006 30.8823528289795 2007 26.2135925292969 2008 34.9514579772949 2009 62.2009582519531 2010 75.1196136474609 2011 75.8293838500977 2012 71.5639801025391 2013 72.0379180908203 2014 75.961540222168 2015 71.4285736083984 2016 71.4285736083984 2017 71.4285736083984 2018 71.9047622680664 2019 71.9047622680664 2020 72.8571395874023 2021 71.4285736083984 2022 70.7547149658203