Year	% of total population
1960	38.7514853400392
1961	39.3865146941372
1962	40.0161777966371
1963	40.6319808821237
1964	41.2358021393775
1965	41.8341536352875
1966	42.4174696808706
1967	42.9935313847628
1968	43.559955788632
1969	44.1121408925971
1970	44.6058890147225
1971	45.0262416441081
1972	45.4236922911167
1973	45.8159831756046
1974	46.1958922828756
1975	46.5620539214701
1976	46.923909833645
1977	47.2790231104595
1978	47.6180115410084
1979	47.9682716392986
1980	48.1348493915819
1981	48.0432075321716
1982	47.8969609859797
1983	47.7588248633123
1984	47.639988513763
1985	47.5363946260277
1986	47.4376676970391
1987	47.3472082543241
1988	47.2726726230284
1989	47.225598302875
1990	47.2946486044712
1991	47.4942979557905
1992	47.7240820545773
1993	47.9500621817907
1994	48.1740765541825
1995	48.3990032912708
1996	48.6211176860785
1997	48.825892567874
1998	49.0205107542355
1999	49.2130433410145
2000	49.314555397408
2001	49.3078427973552
2002	49.2824320417315
2003	49.261560118738
2004	49.2427013975269
2005	49.2276348598188
2006	49.2157279489904
2007	49.2149329643184
2008	49.2190013659129
2009	49.2283388017985
2010	49.2489615233013
2011	49.2752748281004
2012	49.3058560507717
2013	49.3361428041232
2014	49.3664313042025
2015	49.4005167343343
2016	49.4339039834626
2017	49.4650249694554
2018	49.4978598276005
2019	49.5315020400418
2020	49.5854778379848
2021	49.641127282536
2022	49.6751545635544
2023	49.7016513252232