Year	% of adults
2004	0.6
2005	0.6
2006	0.5
2007	0.7
2008	0.7
2009	0.8
2010	1
2011	1.3
2012	1.3
2013	0
2014	1.3
2015	1.6
2016	1.9
2017	1.9
2018	2
2019	1.8