Year	% of total population
1960	64.3713389562061
1961	64.2287688636798
1962	64.0687702769658
1963	64.0294191957587
1964	63.9521434086911
1965	63.6794103963798
1966	63.3550197933647
1967	63.1029056652826
1968	62.8842360363984
1969	62.6711070009921
1970	62.465830923956
1971	62.3197385850233
1972	62.2489511459592
1973	62.2203159127663
1974	62.273353075442
1975	62.3309140205833
1976	62.3226918660649
1977	62.334251871699
1978	62.4241867919504
1979	62.6232964889356
1980	62.8754201000297
1981	63.2002996611492
1982	63.5821106383422
1983	63.9547353716659
1984	64.3310277240168
1985	64.6904391566628
1986	65.0287856764853
1987	65.358041216805
1988	65.691871547117
1989	66.0516666813395
1990	66.4544915517758
1991	66.875814468387
1992	67.2664621639515
1993	67.6210429406666
1994	67.9430404385252
1995	68.2001688175835
1996	68.3960591774687
1997	68.5289474319836
1998	68.5890626827004
1999	68.6180795374068
2000	68.5961601237495
2001	68.4810163985532
2002	68.4498581224035
2003	68.5742588364429
2004	68.7868266946023
2005	68.8670629213338
2006	68.8346922329196
2007	68.8808616458436
2008	68.7735326075677
2009	68.4610789580315
2010	68.0786483132393
2011	67.7124538692134
2012	67.3584312235404
2013	66.926659885911
2014	66.5161931727264
2015	66.2571717181898
2016	66.0808412311452
2017	65.9234034428799
2018	65.8454408583955
2019	65.8675892142499
2020	65.9318580535555
2021	65.9902065694491
2022	65.9370882417879
2023	65.7992931447116