Year	% of total population
1960	37.6980223503223
1961	38.0019979163362
1962	38.6296058855063
1963	39.2864905509637
1964	40.4197937103765
1965	41.8071525765272
1966	42.6810934200364
1967	42.8120094875999
1968	42.4818051174473
1969	42.4606573285852
1970	42.4153127838928
1971	42.3670083254626
1972	42.3402970047823
1973	41.9580970253795
1974	41.7766573574491
1975	42.0584550103807
1976	42.7757711664213
1977	43.7617241626411
1978	44.7892779876336
1979	45.1519811684174
1980	45.2253108227972
1981	45.6061077664307
1982	45.980949874189
1983	46.3211310937884
1984	46.6041607543137
1985	46.81997760219
1986	46.9690331438073
1987	47.0593209020172
1988	47.0984153509858
1989	47.0912267190127
1990	47.0237548026528
1991	46.8689864874723
1992	46.6628605114163
1993	46.4744156909651
1994	46.2771781277275
1995	46.0211130822701
1996	45.7251834443929
1997	45.4199239962407
1998	45.1396917921307
1999	44.8828155434763
2000	44.6252952230534
2001	44.3829232213014
2002	44.1839030394481
2003	44.0342384982064
2004	43.9180064869648
2005	43.850693532167
2006	43.8276801748685
2007	43.8076001027181
2008	43.7606634903924
2009	43.6718154290004
2010	43.5529333619615
2011	43.4267630484948
2012	43.2935453276195
2013	43.1456587459008
2014	42.9733053635357
2015	42.7595659725231
2016	42.5011235716195
2017	42.1793447427196
2018	41.800754251594
2019	41.3967778532538
2020	40.9832336885885
2021	40.5620896763803
2022	40.113736665993
2023	39.6386624401049