Year	% of population
2005	57.2903755713793
2006	55.6812747345008
2007	53.8792079727125
2008	49.2938219227373
2009	44.8909674418586
2010	43.8106984402706
2011	42.286725170836
2012	42.8899673616968
2015	34.6218280063452
2016	35.5325234347123
2017	44.149087771293