Year % of adults 2004 13.7 2005 13.7 2006 13.7 2007 22.2 2008 21.7 2009 31.3 2010 22.7 2011 26.5 2012 25.9 2013 41.6 2014 45 2015 49.1 2016 51 2017 54.7 2018 57.5 2019 60.3