Year % of adults 2005 39 2006 39 2007 37.6 2008 43.5 2009 42.3 2010 35.7 2011 43.2 2012 47.8 2013 41.6 2014 42.1 2015 46.4 2016 46.1 2017 44.2 2018 43 2019 54.2