Year	% of population
2001	16.355730679028827
2002	15.875110459440725
2003	15.29255640715869
2004	14.586801389881305
2005	13.818651627650446
2006	13.25571355548356
2007	12.657367907768135
2008	12.391144701221734
2009	11.980147652703453
2010	11.795629357482662
2011	11.587806773646282
2012	11.692811868375449
2013	11.603225885391643
2014	11.58546086042637
2015	11.49918841719695
2016	11.553496961013552
2017	11.69348453032236
2018	11.866918518628406
2019	12.824235203796494
2020	13.908923173459506
2021	15.112849793900844