Year	% of total population
1960	4.29584304844503
1961	4.25727966173292
1962	4.2300381864698
1963	4.20926313193769
1964	4.18715969340289
1965	4.16034964847771
1966	4.1297814070232
1967	4.09609907287498
1968	4.0606098192261
1969	4.02761487772314
1970	4.00059206044047
1971	3.97975391994263
1972	3.96498721799432
1973	3.95467837755313
1974	3.94667095371108
1975	3.93957425084077
1976	3.93305838186105
1977	3.91945341866319
1978	3.89096251537961
1979	3.84604040825351
1980	3.78393686351723
1981	3.7050032568486
1982	3.60993347680401
1983	3.50238818322731
1984	3.38720875215669
1985	3.26725679176225
1986	3.14373514324126
1987	3.01680994833296
1988	2.88933852093219
1989	2.76892371046827
1990	2.66176993550881
1991	2.56822469572239
1992	2.48781013645126
1993	2.41971405689469
1994	2.36059229999962
1995	2.3066148890662
1996	2.25819590494623
1997	2.21629699709828
1998	2.17927190330074
1999	2.14582147859582
2000	2.11445611664277
2001	2.08343926721282
2002	2.05791767667825
2003	2.03914159521799
2004	2.02311562820007
2005	2.01068728171659
2006	2.0009885075806
2007	1.9968031586292
2008	1.99955990654618
2009	2.00761741599373
2010	2.01947740236353
2011	2.03382401856965
2012	2.05163905809088
2013	2.07329479241596
2014	2.11183802729657
2015	2.17343354360448
2016	2.2416399080172
2017	2.30940527035522
2018	2.37510746293265
2019	2.43624677249421
2020	2.47886962803808
2021	2.49913210263701
2022	2.5111560582731
2023	2.52429529516447