Year	% of total population
1960	65.7351547114797
1961	65.7130373813418
1962	65.613900067588
1963	65.6087809034263
1964	65.5403101121302
1965	65.3558384151742
1966	65.1579800257849
1967	65.042856002114
1968	65.0173098992717
1969	65.0245673681018
1970	64.875913795109
1971	64.683816812763
1972	64.7027392558527
1973	64.8006222570246
1974	64.9018634751027
1975	64.9974145142975
1976	65.1328066654877
1977	65.3435095787002
1978	65.6254176433069
1979	65.9895576648037
1980	66.4173753499898
1981	66.8867458672686
1982	67.3450762891037
1983	67.7495381062625
1984	68.0807430192138
1985	68.2984807623824
1986	68.4127907191297
1987	68.4806712249802
1988	68.4845793154247
1989	68.4361043497363
1990	68.342376506196
1991	68.2460160876641
1992	68.1079090185197
1993	67.9158206726786
1994	67.7626058645899
1995	67.6371713214148
1996	67.5184530695896
1997	67.4240678086877
1998	67.366912199269
1999	67.3279547366199
2000	67.3127998530783
2001	67.4636990765881
2002	67.6815781806588
2003	67.8207651653744
2004	67.9387334035031
2005	68.0400830080685
2006	68.111514232088
2007	68.1599368011049
2008	68.1918076281094
2009	68.1480993043421
2010	68.0457640078975
2011	67.9098561973722
2012	67.7542398212648
2013	67.5949422176318
2014	67.4293286186714
2015	67.2724497725838
2016	67.1036658991905
2017	66.8888294135833
2018	66.6425331384329
2019	66.404241528147
2020	66.2144142815519
2021	65.9689775181957
2022	65.644252392777
2023	65.3315078696266