Year Number 1996 69.5652160644531 1998 65.2173919677734 2000 67.9347839355469 2002 82.7027053833008 2003 78.9189224243164 2004 79.1044769287109 2005 72.5490188598633 2006 77.9411773681641 2007 79.1262130737305 2008 81.5533981323242 2009 75.1196136474609 2010 75.1196136474609 2011 73.459716796875 2012 75.3554534912109 2013 75.3554534912109 2014 81.25 2015 78.5714263916016 2016 80.9523773193359 2017 75.7142868041992 2018 70.476188659668 2019 73.3333358764648 2020 75.7142868041992 2021 72.3809509277344 2022 75.9433975219727