Year	% of total population
1960	22.4205664165853
1961	21.9412138074725
1962	21.5201905406234
1963	21.1894501070067
1964	20.9895834179741
1965	20.9139874508623
1966	20.9174305122103
1967	20.952151333994
1968	20.9407319543452
1969	20.8932070818253
1970	20.8403987118853
1971	20.7960804672435
1972	20.7665013635918
1973	20.7368487576558
1974	20.7182924132936
1975	20.6945763941565
1976	20.6204320482794
1977	20.4787180144706
1978	20.2591658783946
1979	19.9533789250007
1980	19.6076283459735
1981	19.2501411425697
1982	18.8841722713966
1983	18.5683319196271
1984	18.3409796065469
1985	18.1731383865363
1986	18.0187905286758
1987	17.8847721389705
1988	17.8255323455442
1989	17.8275215632438
1990	17.9114104963785
1991	18.0972613936389
1992	18.3212461366957
1993	18.5466886864478
1994	18.7132503207873
1995	18.7796636990908
1996	18.7764864887783
1997	18.7307622309097
1998	18.6576109800917
1999	18.5600351954305
2000	18.4264793651389
2001	18.2596709348365
2002	18.0840503015232
2003	17.8903067246562
2004	17.6629346379007
2005	17.3967805961684
2006	17.1242562717061
2007	16.8951599813297
2008	16.7218199964992
2009	16.624312886655
2010	16.6283679357841
2011	16.7163961546942
2012	16.8561194597753
2013	17.023635361924
2014	17.1905518215244
2015	17.3506552235409
2016	17.5066713940689
2017	17.6340524488004
2018	17.7095426644643
2019	17.7424320978691
2020	17.7450854687151
2021	17.7140280633685
2022	17.5997812945199
2023	17.4199068872981