Year	% of population
2012	27.8090290862149
2013	27.8816677476644
2014	27.954929275463
2015	28.0288111802612
2016	28.1033127040217
2017	28.1782294917759
2018	28.2539728321086
2019	28.3303374796295
2020	28.4075295390131