Year	% of adults
2004	1.1
2005	1.1
2006	1.1
2007	1.1
2008	2.4
2009	23.4
2010	33.5
2011	49.5
2012	56.2
2013	60.3
2014	64.5
2015	66.9
2016	70.1
2017	72.2
2018	48.8
2019	53