Year	% of total population
1960	7.234912894881877
1961	7.416633238379838
1962	7.603985990602833
1963	7.80235527184708
1964	8.02643528441227
1965	8.285803608175007
1966	8.565682532834067
1967	8.836569531085491
1968	9.092986367216312
1969	9.326798634524366
1970	9.547538243273468
1971	9.765348032728049
1972	9.99985430563625
1973	10.236383095365609
1974	10.459639657341935
1975	10.671935390767144
1976	10.85303350280915
1977	11.030917819584278
1978	11.192503903279665
1979	11.310393090187679
1980	11.295471183087963
1981	11.121604095591213
1982	10.87563537249395
1983	10.594967916787352
1984	10.448927595877949
1985	10.470270726071533
1986	10.551693962225551
1987	10.688234455643368
1988	10.868216607936466
1989	11.04936782935532
1990	11.233291389102554
1991	11.422943100472452
1992	11.617576798309065
1993	11.839444942589632
1994	12.074916913398413
1995	12.333410594610932
1996	12.591566464560032
1997	12.830329121349273
1998	13.055115902333327
1999	13.266806248001652
2000	13.472003709298269
2001	13.673152446979074
2002	13.892008257241514
2003	14.093849764806883
2004	14.283623311221934
2005	14.46465237810012
2006	14.630755988113313
2007	14.7768857731577
2008	14.909318946725646
2009	15.053792499559684
2010	15.192996579694242
2011	15.411372452633193
2012	15.746092520561623
2013	16.130159613401865
2014	16.558342546162088
2015	17.00240587743113
2016	17.45581924475025
2017	17.90736604003504
2018	18.35726715244133
2019	18.822836647878688
2020	19.263966691904212
2021	19.6032826097523
2022	19.44531197681974
2023	19.437637012367713