Year	% of total population
1960	31.4634568296669
1961	31.4791818645153
1962	31.3209824060024
1963	31.040019150693
1964	30.7630229765038
1965	30.3941103398032
1966	29.8761178791926
1967	29.2734678173159
1968	28.6483609980071
1969	28.0645378152757
1970	27.5475268231412
1971	27.0449988782233
1972	26.5787095502021
1973	26.2543846920129
1974	26.1112547850073
1975	26.0551219649154
1976	26.0176846934794
1977	26.044527589616
1978	26.0843055534936
1979	26.0974950656235
1980	26.1037000669296
1981	26.1299444751225
1982	26.2139459147865
1983	26.3415686551126
1984	26.4379796760182
1985	26.4772602962244
1986	26.4583720983705
1987	26.3280367086354
1988	26.0776744777133
1989	25.7128032474385
1990	25.268597809859
1991	24.826008884278
1992	24.3715050804972
1993	23.8779791161341
1994	23.3195649742986
1995	22.7169774783965
1996	22.1261021941892
1997	21.5337648665285
1998	20.9360016108491
1999	20.3285422663796
2000	19.7003937088054
2001	19.054040343122
2002	18.433619102226
2003	17.8577306330754
2004	17.3390055927235
2005	16.8750975937372
2006	16.4324493506003
2007	16.0387175920193
2008	15.7185859205812
2009	15.5220339338456
2010	15.4469515367955
2011	15.4128243217093
2012	15.3723871192922
2013	15.3326503825946
2014	15.3154153033202
2015	15.3216241773697
2016	15.3959154725099
2017	15.535811607734
2018	15.6791427100826
2019	15.787532059486
2020	15.8419573951599
2021	15.8810670050161
2022	15.7396012689394
2023	15.6286263853925