Year	% of total population
1960	37.8233511438256
1961	37.32541730910473
1962	36.82747808444008
1963	36.313579928596496
1964	35.799437728804754
1965	35.29945375630049
1966	34.802582237096125
1967	34.29633393160556
1968	33.79809434193144
1969	33.32015564687584
1970	32.856875055502215
1971	32.45234467207591
1972	32.0823798384688
1973	31.72205605852278
1974	31.36555094681561
1975	31.02685985123206
1976	30.75721654254389
1977	30.499504557991347
1978	30.239700447279862
1979	29.98371381232199
1980	29.726677796663694
1981	29.421477523811046
1982	29.135761414288556
1983	28.866150234746087
1984	28.60571374677047
1985	28.344144786142962
1986	28.076222186128927
1987	27.789189283325385
1988	27.504959055527582
1989	27.24211325358845
1990	26.961724301479382
1991	26.67879522986255
1992	26.4150747019872
1993	26.147538210590053
1994	25.875147621893163
1995	25.60453751942723
1996	25.35539784547979
1997	25.115558541783063
1998	24.876308386281746
1999	24.636320215674488
2000	24.397678898760088
2001	24.048528137755252
2002	23.645485961109074
2003	23.261641371122103
2004	22.89330082021477
2005	22.539216073286266
2006	22.211343193133292
2007	21.89745540211697
2008	21.595793944291
2009	21.303225125387748
2010	21.017450311961507
2011	20.792088470468318
2012	20.594669615555972
2013	20.400054781662313
2014	20.20641466812386
2015	20.008750792894315
2016	19.808446084755648
2017	19.604749646772518
2018	19.398927309488514
2019	19.186404654437943
2020	18.972253719192466
2021	18.759469149096827
2022	18.53264498131537
2023	18.315107881557505