Year	% of population
2000	20.5939673265979
2001	20.5472815173527
2002	20.5005931077099
2003	20.4536056364778
2004	20.40631886511
2005	19.9721489886999
2006	19.5450444000148
2007	19.1248922472729
2008	18.7110296424231
2009	18.3030851796557
2010	17.9009514050434
2011	17.504011935079
2012	17.1121604556915
2013	16.7250416362785
2014	16.3420826919898
2015	15.9631874719448
2016	15.5882420568199
2017	15.2164875035595
2018	14.847835432135
2019	14.4819824288711
2020	14.1186346735747
2021	13.7575067532956
2022	13.8462938417752