Year	% of population
2008	21.1549963277662
2009	25.3394594632149
2010	19.8413257292714
2011	21.7640048039912
2012	21.7910155746094
2014	23.0938526817335
2015	24.4874905448532
2016	25.3495359820107
2017	26.0864353140818
2018	21.8713327522269
2019	21.6956936190524
2020	22.5250276121398