Year	% of adults
2004	1.7187500000000002
2005	1.5888888888888888
2006	2.894444444444445
2007	2.52
2008	3.8299999999999996
2009	3.7099999999999995
2010	4.180000000000001
2011	6.529999999999999
2012	7.10952380952381
2013	6.528571428571429
2014	6.923809523809524
2015	8.20909090909091
2016	8.172727272727274
2017	8.536363636363637
2018	9.213636363636367
2019	10.045454545454549