Year	ages 15+
2000	30.3535324231244
2005	28.9331116911513
2010	27.8573282733738
2011	27.5194075208372
2012	27.5055413816978
2013	27.2708842935858
2014	27.0644319052013
2015	26.8564587476757
2016	26.7134317654002