Year	% of total population
1960	40.3446590052983
1961	39.9864608478339
1962	40.0111887693201
1963	40.6514945937034
1964	41.2412266122338
1965	41.4824936141247
1966	41.5483054576375
1967	41.3470253573558
1968	41.1376327060118
1969	41.0522834963068
1970	40.8931903703243
1971	40.7590567702965
1972	40.5060529484732
1973	40.2594143485716
1974	40.2694163758602
1975	40.3374998217866
1976	40.3521483091228
1977	39.8688954515233
1978	38.6025120109685
1979	37.2530039841445
1980	36.1254683719932
1981	35.1058289540369
1982	34.3053590661738
1983	33.3927005142864
1984	32.3075248957237
1985	31.3185023746402
1986	30.4894886559773
1987	29.8993000506356
1988	29.4093506734996
1989	29.0277241932446
1990	28.8844462762349
1991	28.7540842655371
1992	28.5243388981471
1993	28.2863293462597
1994	27.9624144364883
1995	27.5391205541665
1996	27.0258753330879
1997	26.3812135643907
1998	25.752223665355
1999	25.1739828082742
2000	24.5338983395771
2001	23.7835053533298
2002	22.8898375407905
2003	21.9967448214006
2004	21.1409853200141
2005	20.248689181792
2006	19.5435044308303
2007	19.1208972037956
2008	18.8229306205873
2009	18.6123646975772
2010	18.4545712430344
2011	18.3369871593939
2012	18.3062291633771
2013	18.3272907959873
2014	18.3608561183836
2015	18.3565683565715
2016	18.3474893622344
2017	18.4046800417816
2018	18.3905505900045
2019	18.2615109348666
2020	18.0251204603043
2021	17.66807221382
2022	17.2466388906573
2023	16.7879462657534