Year	% of total population
1960	57.5835656805276
1961	57.3244694591489
1962	57.184600794831
1963	57.1809458081082
1964	57.2954754168272
1965	57.5174431201081
1966	57.8458750759663
1967	58.2858507895004
1968	58.8244450073018
1969	59.416540949762
1970	60.0194964777132
1971	60.5941399891481
1972	61.1247611737374
1973	61.6438828632525
1974	62.1876555806423
1975	62.7587647218237
1976	63.3547731930654
1977	63.9695004205403
1978	64.5980136613126
1979	65.2326209197383
1980	65.846691048664
1981	66.4033817996093
1982	66.8895134385413
1983	67.3139600579383
1984	67.6811015272103
1985	68.0042378976323
1986	68.290802003184
1987	68.5287818390649
1988	68.705653111848
1989	68.8290456893582
1990	68.9072550728304
1991	68.9226889920144
1992	67.9820952190731
1993	66.5149371141957
1994	65.6915129720147
1995	65.8116312720852
1996	66.9075981181501
1997	67.8118919458425
1998	68.3175745475338
1999	68.6905943490679
2000	69.0301841195401
2001	69.3202059056023
2002	69.5468046236551
2003	69.6820704452959
2004	69.6849036655837
2005	69.6953225425513
2006	69.8071171738496
2007	69.8969940558283
2008	69.8994000468886
2009	69.8585648894333
2010	69.8691685943752
2011	69.9430545171749
2012	70.000440891428
2013	69.9818814263819
2014	69.8650893605344
2015	69.6305163770414
2016	69.303381283349
2017	68.8849244497209
2018	68.3729205568377
2019	67.8285535667075
2020	67.3330957695822
2021	66.9374703258357
2022	66.7309205599521
2023	66.6079749972554