Year	% of adults
2004	9.5
2005	12.5
2006	18.2
2007	19.7
2008	20.6
2009	20.6
2010	22.4
2011	33.1
2012	33.4
2013	33.7
2014	34.2
2015	34.7
2016	35.1
2017	35.2
2018	26.9
2019	22.9