Year	% of adults
2004	9
2005	8.7
2006	10.6
2007	11
2008	9.7
2009	10.9
2010	13.9
2011	15.7
2012	16.7
2013	20.9
2014	22.8
2015	23.1
2016	24.4
2017	25.4
2018	24.4
2019	23.9