Year	% of adults
2004	14.3
2005	14.3
2006	19.2
2007	20.7
2008	23.7
2009	23
2010	25.5
2011	28.5
2012	31.2
2013	31.7
2014	33.5
2015	35.2
2016	37.4
2017	37.4
2018	38.2
2019	39.4