Year	ages 15+
2000	22.5990468684955
2005	19.8145958643838
2010	17.4169781459829
2011	16.9741040443118
2012	16.6178187422809
2013	16.2200263116168
2014	15.8665282277452
2015	15.547736072107
2016	15.2809253159097