Year % of adults 2004 22 2005 22.1 2006 19.3 2007 33.5 2008 34.5 2009 33.9 2010 22.9 2011 25.8 2012 3.5 2013 5.9 2014 8.8 2015 11.2 2016 12.4 2017 14.3 2018 32.4 2019 44