Year	% of population
2005	55.0427071554617
2006	53.0703348749481
2007	51.1464243467667
2008	48.6272062738561
2009	50.1557006549356
2010	48.3525358530336
2011	47.8664670486262
2012	47.9502823416508
2015	46.6259064548934
2016	46.9259627391137
2017	40.653791545022