Year % of adults 2004 30.9 2005 30.8 2006 43.2 2007 58.3 2008 52.9 2009 51.9 2010 57.6 2011 59.6 2012 58.9 2013 60.7 2014 51.7 2015 51.1 2016 53.5 2017 54 2018 53.6 2019 54.4