Year	% of population
2001	17.439007308241262
2002	17.998311912349084
2003	18.440758403430987
2004	18.290527192062978
2005	17.654949052566824
2006	16.38292512694415
2007	15.119548531456239
2008	14.358714554201027
2009	13.84107742892394
2010	13.292446631961287
2011	12.740604108250022
2012	12.271300034854967
2013	11.893824092893475
2014	11.646136258320295
2015	11.382740541120462
2016	11.099048439374057
2017	10.800032610989826
2018	10.86798713388615
2019	11.59967906389773
2020	12.464970508606644
2021	12.917458447773305