Year	% of adults
2004	15
2005	18.4
2006	21.7
2007	27.9
2008	31.8
2009	32.9
2010	35.7
2011	41.7
2012	44.1
2013	49.2
2014	52.7
2015	60.2
2016	53
2017	56.6
2018	60.2
2019	56.5