Year	% of population
2000	16.75166325735902
2001	16.95693892533445
2002	17.252600874532
2003	17.5486307506669
2004	17.85687503637919
2005	18.22685034105606
2006	18.60290791369278
2007	18.96882857251214
2008	19.35958569743483
2009	19.73709925195666
2010	20.10388928628107
2011	20.33938243749713
2012	20.72431157594875
2013	21.11104276287255
2014	21.50427291611859
2015	21.90743809498177
2016	22.28001815878735
2017	22.64933804015125
2018	22.94847253290021
2019	23.27821625678119
2020	23.61103174506258
2021	25.35694192401636
2022	25.63091124251861