Year	% of total population
1960	23.6733061443791
1961	23.7938689654729
1962	23.8117826671301
1963	23.8476224969441
1964	23.9040413703401
1965	23.9562211889764
1966	23.9819397926182
1967	23.9546140216586
1968	23.8687983806207
1969	23.7497993140188
1970	23.6112184216298
1971	23.4593299777218
1972	23.260914252325
1973	22.9856609491385
1974	22.6324125766118
1975	22.2415699319588
1976	21.8390895742248
1977	21.4323671582737
1978	21.0266050033339
1979	20.6093577361595
1980	20.222804276189
1981	19.8956549547998
1982	19.6112238161553
1983	19.3554584326083
1984	19.1020458141937
1985	18.8347553464845
1986	18.5797620606777
1987	18.3631144010263
1988	18.2072939137396
1989	18.1254522162749
1990	18.1089767967171
1991	18.1259017910158
1992	18.1370055573554
1993	18.1204638093674
1994	18.0586119110768
1995	17.9633128542897
1996	17.8643238306511
1997	17.7785590119423
1998	17.7086897898742
1999	17.6501670714164
2000	17.6079714799073
2001	17.5568546147683
2002	17.4749169975555
2003	17.3742679739935
2004	17.2677739084487
2005	17.1603667897755
2006	17.0512970124185
2007	16.9549601868234
2008	16.9027827342497
2009	16.9009373961502
2010	16.9283145490741
2011	16.9536067500674
2012	16.966479301617
2013	16.9806391043637
2014	16.9897607733501
2015	16.9822053610129
2016	16.964291079238
2017	16.9495347156322
2018	16.928264257393
2019	16.8743106334978
2020	16.7934968825779
2021	16.6881103554996
2022	16.5336142204011
2023	16.3401473882736