Year	% of adults
2004	39.3
2005	45.4
2006	39.9
2007	40.6
2008	40.9
2009	39.2
2010	40.6
2011	51.6
2012	52.6
2013	51.8
2014	53.2
2015	52.8
2016	53.6
2017	52.8
2018	52.2
2019	53.5