Year	% of total population
1960	5.7469962764182645
1961	6.278338896870837
1962	6.600849171071002
1963	6.9345429859094585
1964	7.262846853189458
1965	7.5592343643910445
1966	7.813879512849689
1967	8.033716132117696
1968	8.24455000944199
1969	8.472444524509948
1970	8.72173854080058
1971	8.96220069503897
1972	9.243816460605894
1973	9.552935724446225
1974	9.88260788830915
1975	10.229854967480346
1976	10.59369078765336
1977	10.970544653629972
1978	11.360139600504938
1979	11.748381162086599
1980	12.119473875219775
1981	12.462946855032614
1982	12.806684521074848
1983	13.168981988623552
1984	13.547708650708302
1985	13.955518763929234
1986	14.396706373550968
1987	14.85387428288368
1988	15.328103530390703
1989	15.64435866498993
1990	15.973489833581317
1991	16.315160962504528
1992	16.671906685931752
1993	17.64894105323863
1994	18.493397370676725
1995	18.596324954446317
1996	18.823864685597886
1997	19.159878498873177
1998	19.568250471575706
1999	19.985780435711938
2000	20.428631189678185
2001	20.905713151836213
2002	21.415864091103764
2003	21.93949051106982
2004	22.47313582325077
2005	23.023333053785134
2006	22.879146919431278
2007	22.713213660371157
2008	22.561720548167113
2009	22.423430412538696
2010	22.313441182131985
2011	22.207613586791595
2012	22.114475499286453
2013	22.029897995125122
2014	21.952605948397608
2015	21.88138487392799
2016	21.814407740459455
2017	21.75156743554365
2018	21.69521115481306
2019	21.658251137255018
2020	21.650703931736505
2021	21.682256525837584
2022	21.760453146841137
2023	21.887110593022886