Year	% of total population
1960	27.2575584328548
1961	27.2873358353619
1962	27.1193439534419
1963	26.8713956548457
1964	26.5669913084143
1965	26.1711770262475
1966	25.7568026680843
1967	25.3784224211975
1968	24.9936714693507
1969	24.6259186756835
1970	24.2920966767962
1971	24.0223411160073
1972	23.8398166478736
1973	23.7148723561754
1974	23.6084262205968
1975	23.5025064053192
1976	23.3956125914725
1977	23.2859499915963
1978	23.1888446825322
1979	23.1123336546224
1980	23.0167501108952
1981	22.8862671386478
1982	22.7496633740604
1983	22.6226988125076
1984	22.4952586984697
1985	22.3385648685441
1986	22.1259217677528
1987	21.8637220028528
1988	21.5724298053173
1989	21.2353422416144
1990	20.8366062041546
1991	20.3992868621053
1992	19.9451374451374
1993	19.4664114722989
1994	18.9570759783454
1995	18.4204909231352
1996	17.8820761790084
1997	17.3748183260061
1998	16.9001181423734
1999	16.444414908212
2000	16.0219347601393
2001	15.6266094052571
2002	15.2286785696102
2003	14.8538902082349
2004	14.5503015818681
2005	14.3187638933678
2006	14.1487294081481
2007	14.0624219996847
2008	14.0657501623622
2009	14.116596873842
2010	14.1970920447434
2011	14.3140512032954
2012	14.4591258914618
2013	14.608990797754
2014	14.7542769180647
2015	14.8706641766729
2016	14.9596176113147
2017	15.0486181800159
2018	15.1325024074943
2019	15.1861788161919
2020	15.2025532184162
2021	15.1884286637386
2022	15.1165840505245
2023	14.9618255066993