Year	ages 15+
2000	31.0762568748138
2005	27.3820932791501
2010	24.1444515613901
2011	23.6133415995326
2012	23.1814568338719
2013	22.5802985884239
2014	22.0593783330084
2015	21.550732933607
2016	21.028524046012