Year	% of total population
1960	15.956227220489247
1961	16.36848979724619
1962	16.825095639203045
1963	17.301959880627482
1964	17.772581680741947
1965	18.237431140705606
1966	18.727050365586503
1967	19.19020949977369
1968	19.65077663745147
1969	20.185395472283858
1970	20.709759363511505
1971	20.979357179610272
1972	21.024353819733516
1973	21.068979297948008
1974	21.117163535753697
1975	21.16832084658215
1976	21.22565140357695
1977	21.28873265012104
1978	21.367022363658787
1979	21.463518513589054
1980	21.57828651096865
1981	21.64913235334194
1982	21.616959948309393
1983	21.609361952397762
1984	21.617527555960596
1985	21.636944601740723
1986	21.67036537663293
1987	21.712485894012936
1988	21.765187599670945
1989	21.829889560470185
1990	21.90703542682977
1991	21.990007487481
1992	22.10000157057293
1993	22.203863788716937
1994	22.318293499817997
1995	22.44142276530213
1996	22.571465043289706
1997	22.701364784409687
1998	22.83384574926071
1999	22.96937804670453
2000	23.096695453327293
2001	23.16712742089358
2002	23.133168199950386
2003	23.039022443656194
2004	22.964754934515355
2005	22.898120422223776
2006	22.831898926149123
2007	22.729309431842886
2008	22.68556807524446
2009	22.802274040135416
2010	23.017720566486
2011	23.259635617516892
2012	23.572911797187505
2013	23.983464623425395
2014	24.39416704700225
2015	24.757047242629707
2016	25.084655897756956
2017	25.378469097960917
2018	25.623556634790635
2019	25.671390356139344
2020	25.763539003102565
2021	25.926726018760753
2022	25.89463970493743
2023	25.71402146008702