Year Number 1996 94.9748764038086 1998 93 2000 92.0398025512695 2002 92.5373153686523 2003 88.5572128295898 2004 89.4230804443359 2005 86.6028671264648 2006 87.5598068237305 2007 82.7751159667969 2008 83.6538467407227 2009 83.8862533569336 2010 84.8341217041016 2011 83.0985946655273 2012 85.4460067749023 2013 81.2206573486328 2014 85.0961532592773 2015 83.3333358764648 2016 82.3809509277344 2017 79.0476226806641 2018 77.1428604125977 2019 78.5714263916016 2020 79.0476226806641 2021 80.9523773193359 2022 78.7735824584961