Year	% of population
2008	39.709897094431
2009	37.8553022880997
2010	39.2951335130211
2011	34.0554209782409
2012	37.7221349610816
2013	39.7912883211538
2014	39.1603467243371
2015	53.2398770701841
2016	53.1008599799557
2017	52.911756293955
2018	55.8719172195182
2019	58.9630719405565