Year	% of population
2006	19.7666553793516
2009	17.7036683261327
2011	18.7351423979369
2012	20.09173452036
2015	17.288525197733
2016	14.115894055778
2017	13.3611151748391
2018	12.4343903232619
2019	13.0058734417724
2020	58.9078367934015