Year	% of total population
1960	15.133040539237829
1961	15.242877848444714
1962	15.336815558537912
1963	15.427453882318222
1964	15.52582576287759
1965	15.633794627406525
1966	15.756387718266843
1967	15.88086563346069
1968	16.0168590911733
1969	16.16120327416055
1970	16.31846397014842
1971	16.42535127092844
1972	16.488368040619427
1973	16.55302659230548
1974	16.628396259995014
1975	16.7101044978998
1976	16.791341631156108
1977	16.874868339226648
1978	16.959382914675068
1979	17.024667230185823
1980	17.063110486406657
1981	17.108375944628747
1982	17.15403962965955
1983	17.20403285632814
1984	17.25244187868409
1985	17.30593731177448
1986	17.361166201301124
1987	17.440067655429335
1988	17.484503669093876
1989	17.539835536002883
1990	17.572356065017644
1991	17.584431419893683
1992	17.597068029910325
1993	17.610380419321118
1994	17.648598609512142
1995	17.709019532468243
1996	17.778806562761293
1997	17.857439622207757
1998	17.933647227547688
1999	18.016072727372702
2000	18.11747591358959
2001	18.230383159620885
2002	18.36401225547789
2003	18.497810867014582
2004	18.62689139100442
2005	18.758045534943538
2006	18.896860419726476
2007	19.04738992562726
2008	19.185124622096172
2009	19.332162867004104
2010	19.48649411501681
2011	19.678048642469673
2012	19.823099671621318
2013	19.932798307614444
2014	20.04195745529075
2015	20.149430436477957
2016	20.25793007701208
2017	20.379814165704268
2018	20.507911222495775
2019	20.60995279987064
2020	20.730557120890275
2021	20.87595515209615
2022	21.11486580409933
2023	21.195274243005198