Year	% of population
2008	43.1266886745809
2009	41.3521614424291
2010	41.4127242873134
2011	40.926085962302
2012	41.7394094013046
2015	39.5059626933169
2016	38.6444556563187
2017	39.6407696647394
2018	40.1377874137046
2019	39.956947785683
2020	41.3633047265129