Year	% of total population
1960	36.73801381892067
1961	36.22230442509887
1962	35.69476261619999
1963	35.1490089596671
1964	34.60513751455633
1965	34.05967811082158
1966	33.52865663742952
1967	32.992845855315466
1968	32.466112855493755
1969	31.964900923725427
1970	31.48368275405779
1971	31.069021634413513
1972	30.688394120472903
1973	30.316866931300908
1974	29.9481555272573
1975	29.603549955502913
1976	29.328966652420867
1977	29.063855829076594
1978	28.797498076720096
1979	28.530234807784392
1980	28.262929728769418
1981	27.9811444285596
1982	27.743945173506674
1983	27.524575860856828
1984	27.318362084307537
1985	27.11883581666548
1986	26.89030925125916
1987	26.626520708238065
1988	26.375062057819143
1989	26.16108623030444
1990	25.940767359006138
1991	25.687029789079876
1992	25.434230014530186
1993	25.17849763563961
1994	24.920345027082526
1995	24.667155818334525
1996	24.432115404284932
1997	24.209995847426782
1998	23.98591748825251
1999	23.76175726681831
2000	23.545522300862793
2001	23.19975899392676
2002	22.793136192908186
2003	22.403702618917066
2004	22.0269085580766
2005	21.66433055771844
2006	21.332943931164596
2007	21.019080599140697
2008	20.716037969537247
2009	20.426027221620657
2010	20.147624244544964
2011	19.937926934253294
2012	19.764122383520153
2013	19.596651888515556
2014	19.428920769991176
2015	19.256215037336883
2016	19.080931921208155
2017	18.901761085571287
2018	18.719284273922007
2019	18.52712408750031
2020	18.33819410034984
2021	18.149420919635148
2022	17.89350678105028
2023	17.684860190139386