Year	% of adults
2004	5.2
2005	5.01
2006	5.934615384615384
2007	5.792727272727273
2008	6.4750000000000005
2009	7.571428571428572
2010	8.169642857142858
2011	9.874137931034486
2012	10.647457627118644
2013	11.98225806451613
2014	12.249999999999998
2015	13.56935483870968
2016	15.880645161290321
2017	19.008064516129032
2018	21.558730158730157
2019	22.48095238095238