Year	% of total population
1960	63.726660957485514
1961	63.65786003372483
1962	63.79557841307775
1963	64.03055466191351
1964	64.2817626020895
1965	64.55218679717923
1966	64.87399580168768
1967	65.2096193851302
1968	65.514015788736
1969	65.79550791587721
1970	66.07779208417654
1971	66.30022886103369
1972	66.3873496405035
1973	66.35604751094418
1974	66.1824839431826
1975	65.89448302986766
1976	65.55658974785294
1977	65.21847360840606
1978	64.95291519828511
1979	64.7313778616611
1980	64.61966942423975
1981	64.6667168409368
1982	64.89661244532616
1983	65.27576986432979
1984	65.51514370508089
1985	65.5660614853523
1986	65.5563359275592
1987	65.52679987235506
1988	65.51930907697233
1989	65.59571891717265
1990	65.76017276326318
1991	65.96165942213976
1992	66.186501224186
1993	66.41834637812136
1994	66.66067273890646
1995	66.90045914654421
1996	67.13571969337993
1997	67.38472311338023
1998	67.66213117941825
1999	67.97235898237946
2000	68.31037423601377
2001	68.6480815369166
2002	68.95424172599076
2003	69.24763548090031
2004	69.50908551358648
2005	69.71232020150127
2006	69.85287840551263
2007	69.93094799336673
2008	69.93540119689979
2009	69.85729051208025
2010	69.73898810583916
2011	69.53758459580071
2012	69.21964454537988
2013	68.8442646677705
2014	68.41880837000691
2015	67.96103616728863
2016	67.46399658429846
2017	66.92685668670413
2018	66.38386804321225
2019	65.85127840810134
2020	65.37288712227046
2021	65.01846736112856
2022	65.29568247562946
2023	65.43086443443141