Year	% of population
2001	19.093891512105337
2002	19.678476648215895
2003	20.057079041321742
2004	19.839524347856848
2005	19.008741505703277
2006	17.532505939658126
2007	16.081557512564203
2008	15.326830918503596
2009	14.93332718391382
2010	14.447642794537595
2011	13.982268250994153
2012	13.546169104718576
2013	13.242451418652571
2014	12.955626625748783
2015	12.59186215515206
2016	12.240349396735313
2017	11.836123323954046
2018	11.85408852120581
2019	12.726074318184288
2020	13.878632681020541
2021	14.685426876098507