Year	% of population
2004	10.2062739118388
2005	12.5279566182749
2006	14.5617854033235
2007	13.7198567890872
2008	18.6175386889731
2009	19.4143855383899
2010	20.753447100307
2011	17.4779427113785
2012	24.817797723924
2013	27.428886311963
2014	29.8682396330424
2015	25.1281477676629
2016	24.938449520873
2017	28.548925138
2018	29.5450724202416
2019	26.39807853841