Year	% of total population
1960	20.154663345320706
1961	21.388378608494975
1962	22.581875668953806
1963	23.766660151523613
1964	25.024372769267995
1965	26.34100005997187
1966	26.88650288997406
1967	27.101491303273704
1968	27.31501686520028
1969	27.524093999865144
1970	27.732175816429688
1971	27.95321640882141
1972	28.189846787690293
1973	28.428048979138325
1974	28.6898880437913
1975	28.980388585547022
1976	29.291606156404242
1977	29.59018369879816
1978	29.560979825825974
1979	29.44041898679369
1980	29.33994532777954
1981	29.278345605327548
1982	29.271911008273477
1983	29.219268965897616
1984	29.12350055589401
1985	29.232620889768196
1986	29.3295713503054
1987	29.347454054607358
1988	29.494030438892572
1989	29.54530835156935
1990	30.022729716840974
1991	30.563182064170107
1992	30.526763964528246
1993	29.93107625704181
1994	29.3557416550207
1995	29.205000100721477
1996	29.10601861462267
1997	29.03682228602059
1998	28.890938325688502
1999	28.692671686775057
2000	28.479286372108685
2001	28.308791790404836
2002	28.132974686333366
2003	28.00344883854019
2004	26.821637342515594
2005	25.68245638022984
2006	25.167051499731524
2007	25.068596097531803
2008	25.534405893331325
2009	25.58634740486988
2010	25.39422914692606
2011	25.121482722513868
2012	24.60805871124959
2013	24.061270848716806
2014	23.803028469006343
2015	23.73403618477585
2016	23.726961404641067
2017	23.74279431784459
2018	23.744781440083564
2019	23.764062812774277
2020	23.79492400119332
2021	23.86166296592296
2022	23.96313773141848
2023	24.066706721260463