Year	ages 15+
2000	34.9585864542889
2005	32.9272976013403
2010	31.0749700953028
2011	30.7788349641492
2012	30.3958051400459
2013	30.0402112993762
2014	29.7444948795372
2015	29.4111519180605
2016	29.1331546377296