Year	% of total population
1960	19.17545799535623
1961	19.513824251788435
1962	19.886875986966064
1963	20.265943958846112
1964	20.65568890673378
1965	21.058765119058965
1966	21.451272211813748
1967	21.50938950607086
1968	21.58096993042747
1969	21.666807124553493
1970	21.769012844752453
1971	21.89039201828531
1972	22.02331918774742
1973	22.15646838848412
1974	22.289946310574212
1975	22.413944816408183
1976	22.53422969781117
1977	22.59294568133025
1978	22.599156410826502
1979	22.58845126874927
1980	22.5612543646012
1981	22.529715371680705
1982	22.495201475539083
1983	22.439665440890373
1984	22.374443013430543
1985	22.30805624679892
1986	22.246479014702636
1987	22.28340288023469
1988	22.38112670848812
1989	22.49220907500672
1990	22.630659326119908
1991	22.80772841536044
1992	23.010049051876756
1993	23.221479516863194
1994	23.450498405859822
1995	23.697152432527993
1996	23.958826020421352
1997	24.049069190477056
1998	24.04376932937699
1999	24.046006425569693
2000	24.05893674089573
2001	24.074184212780636
2002	24.08180100161359
2003	24.090210272794547
2004	24.112881553618028
2005	24.145836418472467
2006	24.188438325494822
2007	24.229893775453057
2008	24.269801020297233
2009	24.31032320252763
2010	24.333521870621503
2011	24.312948285883323
2012	24.279299331252208
2013	24.23258760719481
2014	24.179182002103015
2015	24.15934935153309
2016	24.168273219672525
2017	24.20056055746323
2018	24.254922353811445
2019	24.301967404986566
2020	24.362569538135038
2021	24.440159887715215
2022	24.536985067938897
2023	24.638499114389525