Year	% of total population
1960	16.185419316855107
1961	16.355441375459435
1962	16.49301511937779
1963	16.607754667361935
1964	16.72612429068586
1965	16.841227640929983
1966	16.963118322144936
1967	17.104209259329522
1968	17.252779621231074
1969	17.395874518622506
1970	17.566907504286483
1971	17.703654885441424
1972	17.74354708068149
1973	17.773535909185338
1974	17.81890499572796
1975	17.868889393964718
1976	17.921199075271677
1977	17.98067709082302
1978	18.038699583050587
1979	18.09634048020331
1980	18.15160122096948
1981	18.19285523880126
1982	18.190659105350566
1983	18.19925636309272
1984	18.21489324632912
1985	18.23824868670185
1986	18.272232115475354
1987	18.37188669075554
1988	18.36419446071907
1989	18.40039070673319
1990	18.40968634773915
1991	18.390383465477548
1992	18.38420937196504
1993	18.38302230112228
1994	18.392298072155608
1995	18.40192033825751
1996	18.410974779487468
1997	18.41814167086348
1998	18.426312738568726
1999	18.440743080092897
2000	18.462892719981937
2001	18.47772047609522
2002	18.491457754845918
2003	18.50169585876649
2004	18.509419872087815
2005	18.52815216988177
2006	18.56519606412528
2007	18.594644531228823
2008	18.62970380470359
2009	18.69493206939542
2010	18.77527897490856
2011	18.940870331216942
2012	19.023673749726083
2013	19.08373895531861
2014	19.144168081997424
2015	19.21469160899219
2016	19.2886269080741
2017	19.379081294987767
2018	19.467064236466378
2019	19.549361393672765
2020	19.62557037701407
2021	19.714422351375006
2022	19.72689725174271
2023	19.70073484160941