Year	% of total population
1960	15.333922800552774
1961	15.734759267603854
1962	16.141711697165015
1963	16.550167431285157
1964	16.960227025986963
1965	17.37373609611471
1966	17.806293235480556
1967	18.22364388847182
1968	18.63929194172404
1969	19.059275201551458
1970	19.48064839336647
1971	19.916473096892968
1972	20.371678345343224
1973	20.83024416386627
1974	21.290184387569745
1975	21.74824000845361
1976	22.223792635337073
1977	22.573531395655934
1978	22.83963556805183
1979	23.08659588426968
1980	23.31407371378645
1981	23.211391292143137
1982	23.143941310159075
1983	23.4071574384529
1984	23.684585754285237
1985	23.992780458577553
1986	24.352679827752965
1987	24.285694782642935
1988	24.134851585055443
1989	24.025883918973896
1990	23.677411268587672
1991	23.35311914460761
1992	23.20902493861755
1993	23.40358357391119
1994	23.66265194088016
1995	23.69838516969434
1996	23.74219496493885
1997	23.82877559639256
1998	23.907994433342424
1999	23.98219488886695
2000	24.043596535190513
2001	24.089403664359143
2002	24.31545672748768
2003	24.55598103671977
2004	24.630641012263908
2005	24.70682260618637
2006	24.801051577703277
2007	24.890783827934012
2008	24.98971540484097
2009	25.092733127173755
2010	25.187785605499414
2011	25.31738252628392
2012	25.368306850313104
2013	25.336395113631937
2014	25.194596981413795
2015	24.963290205073207
2016	24.84100859154221
2017	24.82006998017492
2018	24.830003919055766
2019	24.895411153908633
2020	25.03165046272724
2021	25.200485804512272
2022	25.362812458463
2023	25.51128754365108