Year Number 1996 78.260871887207 1998 83.6956558227539 2000 84.7826080322266 2002 87.5675659179688 2003 88.1081085205078 2004 83.5820922851563 2005 84.8039245605469 2006 85.2941207885742 2007 86.4077682495117 2008 86.8932037353516 2009 85.1674652099609 2010 81.339714050293 2011 76.3033142089844 2012 76.7772521972656 2013 79.620849609375 2014 72.5961532592773 2015 74.2857131958008 2016 68.0952377319336 2017 71.4285736083984 2018 75.2380981445313 2019 75.7142868041992 2020 77.6190490722656 2021 74.2857131958008 2022 75.9433975219727