Year	% of total population
1960	27.5341866409598
1961	27.5937829563482
1962	27.6547137726015
1963	27.7327148407901
1964	27.8250142513731
1965	27.8942869923337
1966	27.9300244049797
1967	27.9312860493285
1968	27.8985353343375
1969	27.8370032412182
1970	27.7445919553505
1971	27.6411459453718
1972	27.5493856710881
1973	27.4680800775374
1974	27.4174429845088
1975	27.4058726372514
1976	27.4141726280778
1977	27.4012168449954
1978	27.3419723323947
1979	27.2500118167978
1980	27.1251460008464
1981	26.9878452204192
1982	26.8621509424146
1983	26.7393638194552
1984	26.6161279545783
1985	26.5143958726513
1986	26.4122609294671
1987	26.2607203443718
1988	26.0927957496354
1989	25.9116007564507
1990	25.6651360878405
1991	25.3893474909213
1992	25.1497590790847
1993	24.9522700025774
1994	24.8081549995376
1995	24.7357323192968
1996	24.6892155554698
1997	24.6343298093199
1998	24.5657178463246
1999	24.4747500962957
2000	24.3594870276921
2001	24.2263943683903
2002	24.1079607953083
2003	23.9613135450173
2004	23.7530557809597
2005	23.5537644698907
2006	23.3545195741963
2007	23.1213219891965
2008	22.8737647909229
2009	22.6046123446394
2010	22.314982979141
2011	22.0293532541804
2012	21.7604469714554
2013	21.5227788046216
2014	21.3154821022086
2015	21.1415981021609
2016	20.9813736500979
2017	20.7676172100378
2018	20.4907760103319
2019	20.1696938973287
2020	19.7968321883977
2021	19.4366918209202
2022	19.0982161208381
2023	18.7461922401817