Year	% of total population
1960	56.5439129324441
1961	56.1726197894178
1962	55.8257458258375
1963	55.5036608782842
1964	55.3104059522236
1965	55.2353188417218
1966	55.1807465665102
1967	55.1532735114664
1968	55.1561357737237
1969	55.1908395357396
1970	55.2542656463537
1971	55.3332893783971
1972	55.4295740821481
1973	55.509814452462
1974	55.5739969325021
1975	55.6567406650269
1976	55.7501299756415
1977	55.8715816946868
1978	56.0249954630333
1979	56.1882149016326
1980	56.3700664867197
1981	56.5650816448121
1982	56.7433486853375
1983	56.9491025239863
1984	57.1970862093314
1985	57.468252741766
1986	57.7778578899018
1987	58.1250616365948
1988	58.5052710282028
1989	58.8829959741874
1990	59.2391553591632
1991	59.5805799791266
1992	59.917030517598
1993	60.2626766249401
1994	60.6306814592527
1995	61.0212138538765
1996	61.4234031449748
1997	61.8507592511247
1998	62.3145368364338
1999	62.7968819782656
2000	63.2556018960027
2001	63.6527409665745
2002	63.9786765254819
2003	64.2599474008058
2004	64.5498766478308
2005	64.8647025876442
2006	65.1893259343294
2007	65.5128918549988
2008	65.8649026176882
2009	66.2135287643209
2010	66.5254216012039
2011	66.837688158124
2012	67.1457879252307
2013	67.433457608235
2014	67.6605419800223
2015	67.8266958503902
2016	67.9774080758746
2017	68.1300110477783
2018	68.2622554271907
2019	68.353676640659
2020	68.4222329782654
2021	68.4899533922997
2022	68.5436409982808
2023	68.568896912798