Year	% of total population
1960	16.299724041584305
1961	16.69459666237353
1962	17.07784915791587
1963	17.488344887508433
1964	17.931781601044296
1965	18.393995818461033
1966	18.810029202631654
1967	19.10039825055186
1968	19.408091764337552
1969	19.727187728683145
1970	20.054777421205003
1971	20.397571532130932
1972	20.75725089052466
1973	21.119614704466915
1974	21.47180430127588
1975	21.775682306400956
1976	21.933820267543446
1977	22.060197950659678
1978	22.22917968168893
1979	22.383204576902113
1980	22.486108840212587
1981	22.51421819250364
1982	22.535785196915285
1983	22.575137614932377
1984	22.62060120844102
1985	22.693312129831533
1986	22.78905224465329
1987	22.831740406808184
1988	22.904564752361782
1989	22.966358567612946
1990	23.07821686821053
1991	23.165470703924523
1992	23.27046628471946
1993	23.40915802139394
1994	23.555863720828302
1995	23.658711652086257
1996	23.772695089328835
1997	23.84584366242025
1998	23.916513815211857
1999	23.989688553079407
2000	24.066559121381843
2001	24.14871075477189
2002	24.290545001848475
2003	24.411934041744335
2004	24.414686780993115
2005	24.42838776411933
2006	24.431334208923158
2007	24.419311893273868
2008	24.47724047925871
2009	24.545043529293416
2010	24.62009720514812
2011	24.406987945816343
2012	24.296959938491742
2013	24.22948095688803
2014	24.21567992196713
2015	24.41267159290374
2016	24.699903518342605
2017	24.877508612908237
2018	25.053334223661967
2019	25.102798200377364
2020	25.22145176337005
2021	25.369985276304586
2022	25.477272814899756
2023	25.56766482061056