Year	% of total population
1960	27.438425782382
1961	27.3989793455382
1962	27.4229730714762
1963	27.3915983417331
1964	27.4143244678932
1965	27.5310787493572
1966	27.6544899397431
1967	27.7479169970303
1968	27.7947356895547
1969	27.850995827065
1970	27.8749452876053
1971	27.8521775392017
1972	27.7758320149637
1973	27.651836752992
1974	27.5068846082399
1975	27.3370013353586
1976	27.1837920318025
1977	27.0148668907215
1978	26.7587954931126
1979	26.3913801633278
1980	25.9622271787015
1981	25.4811569857962
1982	24.9498810612322
1983	24.4216101961343
1984	23.8783962676891
1985	23.305574559315
1986	22.6937697533279
1987	22.03735243474
1988	21.3548562902906
1989	20.6420749561141
1990	19.8839137854058
1991	19.1340973549726
1992	18.4469358461959
1993	17.7958914850633
1994	17.1640361929627
1995	16.5774250548913
1996	16.0532331945023
1997	15.5982386233745
1998	15.21612718524
1999	14.9108243473127
2000	14.6869070832831
2001	14.542694260092
2002	14.4729083647569
2003	14.464341401744
2004	14.4613763989692
2005	14.4690005400892
2006	14.5260294194217
2007	14.5956633040401
2008	14.7035045362781
2009	14.8474009059568
2010	14.9735760309309
2011	15.0766482201479
2012	15.1496388763887
2013	15.1885925463172
2014	15.1900219588908
2015	15.1562020326701
2016	15.0953337415246
2017	15.0091846115234
2018	14.8623367438776
2019	14.6477912843276
2020	14.3956333577662
2021	14.10691172214
2022	13.7978723714063
2023	13.46492562468