Year	% of adults
2004	14.8
2005	14.7
2006	14.9
2007	14.9
2008	14.8
2009	14.7
2010	14.9
2011	20.5
2012	18.9
2013	19.5
2014	19.6
2015	20.5
2016	20.7
2017	20.9
2018	21.4
2019	22