Year Number 1996 71.739128112793 1998 70.1086959838867 2000 70.6521759033203 2002 82.1621627807617 2003 68.1081085205078 2004 74.6268692016602 2005 69.1176452636719 2006 70.0980377197266 2007 68.4466018676758 2008 66.9902877807617 2009 64.1148300170898 2010 61.7224884033203 2011 65.4028472900391 2012 72.511848449707 2013 74.407585144043 2014 80.288459777832 2015 81.9047622680664 2016 80.476188659668 2017 80.476188659668 2018 79.523811340332 2019 78.0952377319336 2020 82.8571395874023 2021 81.9047622680664 2022 82.0754699707031