Year	% of population
2008	19.0120697697041
2009	19.2989360877059
2010	24.0385071370987
2011	23.7131265826231
2012	26.9128202264206
2014	26.8358338275437
2015	23.8298901847422
2016	25.3685568015902
2017	28.1572357014671
2018	28.8073151498004
2019	28.62905462701
2020	33.0187697665607