Year	% of total population
1960	23.1771483271815
1961	23.3514400649345
1962	23.3639824365536
1963	23.2610148038933
1964	23.0400975782372
1965	22.8082885192306
1966	22.5682489309301
1967	22.333481468516
1968	22.20960983761
1969	22.1333962085083
1970	22.0636725871311
1971	22.0419204622656
1972	22.0173635057937
1973	21.9388383814391
1974	21.7985124462067
1975	21.6440567692934
1976	21.5494076378318
1977	21.5147055927309
1978	21.5304789627176
1979	21.5760265085992
1980	21.6503507487899
1981	21.7724699372749
1982	21.9162229649573
1983	22.0400494516387
1984	22.1024797444009
1985	22.1161673161697
1986	22.1249616704958
1987	22.1576068573769
1988	22.2261228300331
1989	22.2817229707646
1990	22.2555412517174
1991	22.1079797423013
1992	21.8120316298268
1993	21.4338866638018
1994	21.0719191286735
1995	20.7006246665864
1996	20.2610007876376
1997	19.7630303414023
1998	19.206475018717
1999	18.3886552069703
2000	17.6344866564797
2001	17.1556515533743
2002	16.6497853890548
2003	16.117412006839
2004	15.6130307920003
2005	15.2078894956823
2006	14.9597593244868
2007	14.8548253006454
2008	14.8880600084816
2009	15.0358004168442
2010	15.2355364297596
2011	15.4325768082511
2012	15.5912759075878
2013	15.7388021000295
2014	15.8858782557363
2015	16.0146015327958
2016	16.1519402124208
2017	16.2758334892416
2018	16.3638323258184
2019	16.4345646339575
2020	16.4657932188193
2021	16.4693561606411
2022	16.4061710538421
2023	16.2647498744108