Year	% of total population
1960	13.778794733016964
1961	14.029633049551832
1962	14.285777625470617
1963	14.560986261466654
1964	14.860244211742579
1965	15.15345377480593
1966	15.445453951238644
1967	15.741038735257984
1968	16.048168688130502
1969	16.367170438197746
1970	16.697481942113285
1971	17.044114739145133
1972	17.239328970456498
1973	17.43306569557315
1974	17.63616408408211
1975	17.84261478500403
1976	18.055428215760344
1977	18.26156105367366
1978	18.459759251930112
1979	18.65875027735518
1980	18.85172425218173
1981	19.040392394001266
1982	19.23780406246468
1983	19.293820127520622
1984	19.340507802281962
1985	19.408610053146447
1986	19.513249083898902
1987	19.65685900755307
1988	19.823077756497625
1989	20.007827529647876
1990	20.20619259907303
1991	20.41788079541756
1992	20.642993910870718
1993	20.880677970751634
1994	21.137164742652068
1995	21.193886337586218
1996	21.211723667902476
1997	21.235565726292815
1998	21.267620964078464
1999	21.311930437441575
2000	21.367298191890814
2001	21.427612219896808
2002	21.495823962043037
2003	21.577370085636925
2004	21.654682954238027
2005	21.655961562967704
2006	21.648679133689846
2007	21.647777822638265
2008	21.650636105740126
2009	21.65422911307246
2010	21.65407433543925
2011	21.648298569714
2012	21.642349557535525
2013	21.639546666239887
2014	21.646865421050894
2015	21.66804717515553
2016	21.697709055311172
2017	21.736284066858037
2018	21.793043219720953
2019	21.87430793527882
2020	21.96628985020267
2021	22.0739888011258
2022	22.20324480469057
2023	22.34786513461771