Year	% of total population
1960	16.794271655495546
1961	17.184021827180302
1962	17.578635803636697
1963	17.891959492556513
1964	18.14932736645867
1965	18.40579718290965
1966	18.667878752369326
1967	18.935181143373995
1968	19.208440309712387
1969	19.485956148011095
1970	19.77265859987055
1971	20.068607123602415
1972	20.374079952491954
1973	20.685243517428837
1974	21.008828811178734
1975	21.369937118849343
1976	21.743334005535605
1977	22.12584416648405
1978	22.521956591696988
1979	22.930808369590874
1980	23.354623889712748
1981	23.790071644740166
1982	24.242287089563302
1983	24.496192703100647
1984	24.609366817766062
1985	24.725384742310908
1986	24.84684032701039
1987	24.97535299283325
1988	25.11790621826663
1989	25.273920110164504
1990	25.447861052760917
1991	25.57225017239396
1992	25.682233694715023
1993	25.823993164720306
1994	25.986353828968316
1995	26.16111339499621
1996	26.348346243352882
1997	26.54604608437318
1998	26.756492970765738
1999	26.975891001370766
2000	27.201687687655816
2001	27.425886423758133
2002	27.49536000962159
2003	27.458954029957034
2004	27.425700942762006
2005	27.395444535560316
2006	27.366744994543176
2007	27.338893553005633
2008	27.31550286590893
2009	27.296851893328565
2010	27.28487813371751
2011	27.30794905907232
2012	27.363678736141317
2013	27.43742299889671
2014	27.525527331317456
2015	27.61500409177581
2016	27.701733346675113
2017	27.770740561865694
2018	27.74614484811414
2019	27.640555035995696
2020	27.676917911862773
2021	27.776070631901124
2022	27.890956057996778
2023	28.0336740902551