Year	% of total population
1960	68.0880929948308
1961	67.6662339262193
1962	67.3155084226455
1963	67.0057212559519
1964	66.6378133584178
1965	66.2539342741226
1966	65.9087054472647
1967	65.6092287656883
1968	65.4194599261526
1969	65.3370442741051
1970	65.2916526689888
1971	65.4054955032671
1972	65.7021002399738
1973	65.9233188043049
1974	66.0918019164056
1975	66.3123309671682
1976	66.6005411799747
1977	66.8795435799886
1978	67.0923009175532
1979	67.3374075584407
1980	67.6583063223557
1981	68.0459183533485
1982	68.467481233905
1983	68.9529485648142
1984	69.3738987559445
1985	69.597043109047
1986	69.7270282749817
1987	69.8045888755595
1988	69.7334454465605
1989	69.554502067919
1990	69.334048493639
1991	69.0506044925123
1992	68.742145914854
1993	68.4111949281253
1994	68.0653959086517
1995	67.7530538925094
1996	67.4915265312444
1997	67.291529989018
1998	67.1472601567378
1999	67.0253884664789
2000	67.104502006299
2001	67.2211526585299
2002	67.191545426513
2003	67.2664209601608
2004	67.3571966093513
2005	67.4533918312952
2006	67.6087285551441
2007	67.7775265515449
2008	67.9863620224073
2009	68.1934769858677
2010	68.403936738455
2011	68.7372396305716
2012	69.0202031910092
2013	69.1019775699248
2014	69.1581717752907
2015	69.2609422952806
2016	69.424754564576
2017	69.5349100468318
2018	69.5485209232242
2019	69.5306085910193
2020	69.4608736206168
2021	69.3411447457537
2022	69.1715861204233
2023	68.9566907337337