Year	% of total population
1960	7.97346091807391
1961	8.18174350581033
1962	8.3621920218096
1963	8.54891797504127
1964	8.78476336527883
1965	9.06347686365954
1966	9.33632086781814
1967	9.58471827718202
1968	9.81636487762956
1969	10.0320469652934
1970	10.2598105320411
1971	10.5208768635694
1972	10.8001465680654
1973	11.0710236494521
1974	11.2727894822073
1975	11.3761700496677
1976	11.424420233882
1977	11.4467153433631
1978	11.4330616562583
1979	11.3776970849922
1980	11.2577054565964
1981	11.0756970877243
1982	10.8672737242498
1983	10.6524591434519
1984	10.4849366203812
1985	10.4006082465876
1986	10.4047500991134
1987	10.4864557371246
1988	10.6254864478913
1989	10.7943152997849
1990	10.9811225863063
1991	11.1803039231955
1992	11.4181511043363
1993	11.6939496941754
1994	11.9580480506803
1995	12.2374636985483
1996	12.548273492204
1997	12.888172344793
1998	13.2565163842799
1999	13.623338719584
2000	14.0243188444166
2001	14.4741417617612
2002	14.9315134340729
2003	15.3888908903572
2004	15.8387607517229
2005	16.260490115259
2006	16.6732597406838
2007	17.0749300784512
2008	17.4283098055361
2009	17.7102725721503
2010	17.9807318752661
2011	18.2446756602649
2012	18.4678101458506
2013	18.7074818138033
2014	18.9943162230137
2015	19.2703401366742
2016	19.5037382312653
2017	19.7321868167811
2018	19.943656878911
2019	20.177492196612
2020	20.4200383190737
2021	20.5900058152251
2022	20.7961658948639
2023	21.2197907445008