Year	% of population
2008	59.9474271689942
2009	58.5518683391892
2010	58.2790971051336
2012	57.3047793751996
2013	54.099109212057
2014	55.2386090565848
2015	52.7001990922868
2016	54.081262435566
2017	53.5272670336166
2018	49.0659826467431
2019	47.0745777738804