Year	% of adults
2000	20.3533794788228
2005	19.3166033861115
2010	18.3181585802927
2011	18.154054918226
2012	18.0015372730216
2013	17.8187768760891
2014	17.6672001905865
2015	17.4909022415662
2016	17.3194832469662