Year	% of adults
2004	1.9
2005	2.2
2006	3.1
2007	2.9
2008	8.7
2009	14.3
2010	18.6
2011	29.4
2012	33.6
2013	39
2014	44.5
2015	50.3
2016	57.2
2017	35
2018	46.5
2019	48.7