Year	% of total population
1960	14.134020437340185
1961	14.39623444186936
1962	14.579187235106339
1963	14.712011698902904
1964	14.860066936814274
1965	15.020110933039781
1966	15.14735361995018
1967	15.274979325471639
1968	15.408721051809215
1969	15.543005701631001
1970	15.674915492707362
1971	15.765953216257982
1972	15.864215446772736
1973	15.969004426858218
1974	16.086385780932865
1975	16.169537639674765
1976	16.288070031310035
1977	16.41363924742789
1978	16.547554872802372
1979	16.682242583739693
1980	16.82278478595209
1981	16.92919915567692
1982	17.01146721300735
1983	17.1144070851189
1984	17.229335603434105
1985	17.350300320918898
1986	17.479280566909726
1987	17.615380957710375
1988	17.753537132161174
1989	17.9010511246286
1990	18.06063932624516
1991	18.23107315061703
1992	18.3839556339083
1993	18.54645489396066
1994	18.7278483370997
1995	18.929438809128946
1996	19.149600221889543
1997	19.374677371536933
1998	19.619942482811858
1999	19.88859670015155
2000	20.183362221125478
2001	20.385154390058286
2002	20.550491274510037
2003	20.724623565073415
2004	20.903752829613722
2005	21.089469548142645
2006	21.282826262538222
2007	21.480004378775647
2008	21.69807707056495
2009	21.925924638083032
2010	22.153569042517447
2011	22.345274793215765
2012	22.521074264043293
2013	22.704234012047905
2014	22.898635475916475
2015	23.112685722775428
2016	23.335380929884742
2017	23.557113231425973
2018	23.79521944295213
2019	24.00207413943874
2020	24.22227699020712
2021	24.477826366869763
2022	24.748089613302042
2023	24.9792217389472