Year	% of total population
1960	65.6500687520633
1961	65.6007085685275
1962	65.6899288070604
1963	65.9007438715416
1964	66.0999635808106
1965	66.3178843871475
1966	66.5160205896028
1967	66.6366867311794
1968	66.8189979674626
1969	67.1977063590634
1970	67.620043728938
1971	67.8934222182312
1972	67.9237655201112
1973	67.7605373455101
1974	67.404701897992
1975	66.8811247731931
1976	66.3455202593069
1977	65.7824826616996
1978	65.2606803538574
1979	64.8324613922872
1980	64.6501170845485
1981	64.8208296896622
1982	65.1896798728221
1983	65.6841714674058
1984	66.0008383969748
1985	66.0149821377326
1986	65.9329366751915
1987	65.8521418915547
1988	65.8222277361066
1989	66.0144428689627
1990	66.3989492279266
1991	66.7355743711148
1992	67.0290833886649
1993	67.2873086498709
1994	67.4814603602982
1995	67.6028702734084
1996	67.7165731292868
1997	67.8380104644855
1998	67.9177882512334
1999	68.0222371756875
2000	68.1774015137146
2001	68.3809615978848
2002	68.5451694042653
2003	68.6554401425886
2004	68.7703765196715
2005	68.8584100968425
2006	68.9270301342962
2007	68.9379371719724
2008	68.8933716831728
2009	68.8026957272009
2010	68.748726447094
2011	68.6880242919784
2012	68.4946786107455
2013	68.1999430095457
2014	67.816737318301
2015	67.4196022732467
2016	67.020320568161
2017	66.6633244597143
2018	66.3122998519643
2019	65.8390466726407
2020	65.3455271472521
2021	65.0266545524278
2022	65.5478121849858
2023	65.8735039614566