Year	% of total population
1960	32.7789184310863
1961	32.9446070134826
1962	32.9613497590104
1963	32.9053324651007
1964	32.8279256772823
1965	32.7196211522805
1966	32.5793039373317
1967	32.4427312148936
1968	32.3193730127072
1969	32.1498984783871
1970	31.9055133556806
1971	31.6398127426138
1972	31.3496147391298
1973	30.9767405501775
1974	30.5243965121736
1975	30.0554236764674
1976	29.5664988816463
1977	28.9877287918466
1978	28.3596742849353
1979	27.7579804486149
1980	27.1991719538283
1981	26.6817217177945
1982	26.1578932995074
1983	25.6208485735414
1984	25.1097616110563
1985	24.6443968534023
1986	24.2125429392526
1987	23.8051608896694
1988	23.4835654502018
1989	23.2965229898418
1990	23.2611460243655
1991	23.1808286939421
1992	23.0770297765432
1993	23.080233547917
1994	23.0817115292495
1995	23.0689897609974
1996	23.0409224189896
1997	23.0078535917192
1998	22.9627269396364
1999	22.8890175501797
2000	22.7749265550029
2001	22.6047758131119
2002	22.3786074170649
2003	22.1196654378758
2004	21.8456202068477
2005	21.5462058115347
2006	21.2812722937776
2007	21.1215508064207
2008	21.0298554881376
2009	20.9523421080245
2010	20.870348685451
2011	20.7676931044407
2012	20.6296215130793
2013	20.4402441534304
2014	20.2260203646497
2015	20.0301486301325
2016	19.8651330171863
2017	19.7361433543924
2018	19.5722312952333
2019	19.3069759150673
2020	19.0681692154534
2021	18.8906428265439
2022	18.7042823171748
2023	18.5143664538137