Year	ages 15+
2000	18.939946314096
2005	18.3733905722572
2010	18.5368730790669
2011	18.6075669456396
2012	18.6903341333827
2013	18.8517889889224
2014	19.0636482536912
2015	19.2803326525875
2016	19.4372983119862