Year	% of population
2000	16.3794946916106
2001	16.5975952479298
2002	16.8151542285613
2003	17.0321532501804
2004	17.2487008096089
2005	17.4642525560946
2006	17.6794433895241
2007	17.893860360696
2008	18.107742128752
2009	18.3208073608516
2010	18.5332942492702
2011	18.7450509527494
2012	18.9561823261431
2013	19.1662858984987
2014	19.3758464383761
2015	19.5845877472555
2016	19.7922384779092
2017	19.9987800028527
2018	20.2039464819127
2019	20.4080904532095
2020	20.6108258720445
2021	20.8121374661631
2022	21.0121303393868