Year	% of population
2006	41.8292665435876
2009	39.984595720987
2011	37.6142901134602
2012	38.5195106406484
2015	41.3282641125529
2016	40.1681512754044
2017	41.4054305428334
2018	42.7571311574289
2019	43.0222161072428
2020	36.0996281954103