Year	% of total population
1960	66.1342581250516
1961	65.6076432404545
1962	65.3913099186175
1963	65.307841759903
1964	65.429636698175
1965	65.5285541432915
1966	65.5954207371807
1967	65.7061494880018
1968	65.7336006478883
1969	65.8186927025225
1970	65.9978431055118
1971	66.1290240237376
1972	66.2070580394313
1973	66.3368625369936
1974	66.4656226004095
1975	66.5663953629237
1976	66.6345047318079
1977	66.6348298523647
1978	66.6676322823797
1979	66.6568261100874
1980	66.6363121667893
1981	66.7924009206653
1982	67.0269841152622
1983	67.1133521454835
1984	67.0450837972664
1985	67.0258916109807
1986	67.0014537635081
1987	66.9267114462615
1988	66.81425118572
1989	66.6318853109531
1990	66.4503403840335
1991	66.2961249654352
1992	66.1519589779723
1993	66.0017612550635
1994	65.9337827535653
1995	65.9792985935621
1996	66.1487053759994
1997	66.4916770354635
1998	67.1002604155673
1999	67.8749913397411
2000	68.4959625053771
2001	68.9553988064824
2002	69.1826478724106
2003	69.2008816139624
2004	69.2210535785963
2005	69.3005174941236
2006	69.4038839594892
2007	69.5713486310171
2008	69.8553499731829
2009	70.0992778980516
2010	70.3408757820835
2011	70.4484114407477
2012	70.2993431969071
2013	70.0260882954999
2014	69.5843108436441
2015	69.0892998006961
2016	68.6358507394314
2017	68.2202790491619
2018	67.9258905787547
2019	67.6782917011928
2020	67.4827124911094
2021	67.3780585435505
2022	65.7656897598365
2023	64.4395800001652