Year	% of adults
2004	6.5
2005	6.5
2006	7.4
2007	8.3
2008	8.1
2009	7.6
2010	10.7
2011	11.4
2012	13.2
2013	15.6
2014	15.3
2015	14.1
2016	17.9
2017	15.9
2018	15.7
2019	7.5