Year	ages 15+
2000	23.904659259315
2005	21.039670129993
2010	18.9298450461578
2011	18.5115662019912
2012	18.2034199171082
2013	17.8665459576694
2014	17.551333993729
2015	17.2855901685778
2016	17.0260539331026