Year	% of population
2006	25.288418013529
2009	17.5605859414405
2011	18.6521436332286
2012	19.5278768064906
2015	23.7161630091311
2016	23.197618002797
2017	22.1222739939356
2018	22.2433931955255
2019	21.9995809670906
2020	51.6526428031477