Year	% of population
2008	45.6444890640426
2009	46.41644276819
2010	45.7292054971403
2012	52.9409166407923
2013	48.2547883630572
2014	46.2365975621912
2015	47.9777930749655
2016	53.8287645579923
2017	51.9908784036195
2018	52.5963915199973
2019	48.8030548637682