Year	% of total population
1960	30.1925365083752
1961	30.197895237812
1962	30.0588814883727
1963	29.9021788662568
1964	29.7695193929287
1965	29.612003405977
1966	29.4423836844221
1967	29.2425551121126
1968	29.0384348922654
1969	28.8947897102858
1970	28.7793018748778
1971	28.6395581411752
1972	28.4501220404023
1973	28.1785595447928
1974	27.8355256861224
1975	27.4314460484914
1976	26.9690809393199
1977	26.4978002045322
1978	26.0427700596696
1979	25.6152789771335
1980	25.2510969517428
1981	24.9436262866457
1982	24.6514853697924
1983	24.3355555156849
1984	23.974728033215
1985	23.5651276759892
1986	23.1167679294522
1987	22.7082044195276
1988	22.3998924597343
1989	22.1797546025419
1990	22.0249609294414
1991	21.9133447055195
1992	21.822365795879
1993	21.7317994394184
1994	21.6348018006118
1995	21.519675694033
1996	21.3775259624292
1997	21.2208084838389
1998	21.0604270036659
1999	20.9012269444776
2000	20.7371998778208
2001	20.5556432263529
2002	20.3543168655489
2003	20.1474780520574
2004	19.9476177130945
2005	19.7550230011253
2006	19.5815294158459
2007	19.4336490128957
2008	19.2986634473954
2009	19.1716135235797
2010	19.056350833593
2011	18.9711546710534
2012	18.9357849563926
2013	18.9256202512991
2014	18.9114082764031
2015	18.9005638126221
2016	18.8892663434453
2017	18.8504743134126
2018	18.7801545524021
2019	18.6784507103908
2020	18.5417282291673
2021	18.3733291452377
2022	18.180046703239
2023	17.9796681140363