Year	% of total population
1960	2.90600214946712
1961	2.90355101632655
1962	2.90037978870851
1963	2.90735882571817
1964	2.9224484593062
1965	2.93331355056317
1966	2.94206306828295
1967	2.94963218666642
1968	2.95602044690265
1969	2.96206760882235
1970	2.96895215000921
1971	2.97844116303446
1972	2.9886858815246
1973	2.99779427142403
1974	3.00777908887936
1975	2.96219414255227
1976	2.86988832873674
1977	2.79001318935892
1978	2.72074509785615
1979	2.66423504578483
1980	2.62414933683337
1981	2.60575768084475
1982	2.61173738555213
1983	2.56534562137695
1984	2.53482439929464
1985	2.57830933148668
1986	2.62114785806597
1987	2.66589503083101
1988	2.70984764549181
1989	2.75115648428777
1990	2.77893616438747
1991	2.81121091275402
1992	2.85205460031555
1993	2.88924663952357
1994	2.91975216421062
1995	2.95476334727705
1996	2.99396565238174
1997	3.04017538706835
1998	3.08863455912902
1999	3.13697354917639
2000	3.185556627052
2001	3.23470388947591
2002	3.2830986216916
2003	3.32796626444713
2004	3.37246771081586
2005	3.41517574222718
2006	3.45103616169141
2007	3.48153136729695
2008	3.50694887202645
2009	3.52896769593237
2010	3.54622040639251
2011	3.54233925383438
2012	3.52845467081881
2013	3.51523638776346
2014	3.48166946128666
2015	3.44746656190398
2016	3.43033691928397
2017	3.41691908341501
2018	3.40544456354585
2019	3.39556041786143
2020	3.37516752793
2021	3.34093237870145
2022	3.30827934020545
2023	3.29302513400462