Year	ages 15+
2000	26.039424185457
2005	24.534778093919
2010	23.3310298291375
2011	23.1415370502913
2012	22.9259841150574
2013	22.7359120880253
2014	22.6095648294213
2015	22.4453033257225
2016	22.3515073499803