Year Number 1996 62.9032249450684 1998 67.3796768188477 2000 62.7659568786621 2002 65.0793685913086 2003 71.9576721191406 2004 69.4581298828125 2005 71.7073135375977 2006 72.6829299926758 2007 73.3009719848633 2008 70.8737869262695 2009 70.3349304199219 2010 70 2011 71.0900497436523 2012 69.6682434082031 2013 70.1421813964844 2014 72.1153869628906 2015 73.3333358764648 2016 70.9523773193359 2017 75.2380981445313 2018 68.5714263916016 2019 76.1904754638672 2020 80.476188659668 2021 80.9523773193359 2022 79.7169799804688