Year	% of total population
1960	26.8890653958168
1961	27.3799618227204
1962	27.9066600081718
1963	28.4006925968157
1964	28.7943262411348
1965	29.021198156682
1966	29.3688986663
1967	29.9564927434977
1968	30.3814514476419
1969	30.4352539433032
1970	30.1880617305707
1971	29.7774546818939
1972	29.2506131744919
1973	28.6264783651383
1974	27.9646187866551
1975	27.2888438647588
1976	26.6356017546555
1977	26.0040712139326
1978	25.3549664604663
1979	24.6338820221428
1980	23.7328353598607
1981	22.6508955728287
1982	22.0153893984144
1983	21.7624653739612
1984	21.2811607259279
1985	20.5434894258095
1986	19.9190869322106
1987	19.4846226514118
1988	18.9680693592726
1989	18.3990627148349
1990	17.7881070385201
1991	17.2401663224165
1992	16.7980308465789
1993	16.4100006761782
1994	16.0779527172043
1995	15.7935719677407
1996	15.5992049573249
1997	15.4965832843759
1998	15.4267436776584
1999	15.3613586170132
2000	15.2774310677408
2001	15.244028310233
2002	15.264966795345
2003	15.2494672394547
2004	15.1767435512488
2005	15.0052301582828
2006	15.0933988195037
2007	15.4614710529177
2008	15.786601801328
2009	16.0923197746845
2010	16.3186263886073
2011	16.435327877564
2012	16.4126034148917
2013	16.2513223991649
2014	15.9400459359271
2015	15.5034113637789
2016	15.1729034125764
2017	14.6953065218422
2018	14.095462816693
2019	13.6718494164494
2020	13.3346203346203
2021	13.0747526381051
2022	12.7950240529164
2023	12.4200879033064