Year % of adults 2004 24.9 2005 37.9 2006 51 2007 53 2008 65.2 2009 73.1 2010 73.2 2011 95.7 2012 74.2 2013 76 2014 76.6 2015 78.7 2016 79.2 2017 79.5 2018 80.5 2019 81.1