Year	% of population
2005	47.4137621330605
2006	46.7604022281411
2007	47.0854963177706
2008	47.8292487018971
2009	44.9973211072686
2010	45.7458776638488
2011	44.4532410340893
2012	44.1087945650808
2015	43.0479229136467
2016	44.0577162211352
2017	42.4349488644175