Year	% of adults
2004	2.176470588235294
2005	2.3235294117647065
2006	3.2411764705882358
2007	3.7941176470588234
2008	5.235294117647059
2009	5.276470588235294
2010	6.329411764705882
2011	7.935294117647059
2012	8.738888888888889
2013	11.475000000000001
2014	10.975
2015	14.395
2016	15.290000000000001
2017	16.35
2018	17.32
2019	16.865000000000002