Year	% of adults
2004	4.469444444444445
2005	4.6395348837209305
2006	4.579545454545454
2007	5.463636363636363
2008	5.7727272727272725
2009	5.461363636363637
2010	5.618181818181818
2011	6.013636363636365
2012	6.275555555555555
2013	6.641304347826087
2014	6.4739130434782615
2015	7.06808510638298
2016	7.74468085106383
2017	8.351063829787234
2018	9.063829787234043
2019	11.187234042553195