Year	% of total population
1960	31.995514164126828
1961	32.35393362814011
1962	32.42440579276941
1963	32.35347586014344
1964	32.09656341236459
1965	31.71618163033225
1966	31.331268010796336
1967	30.950535515855904
1968	30.55523916706287
1969	30.111127978912194
1970	29.617936017290116
1971	29.149860162047897
1972	28.728835327702917
1973	28.325824835910726
1974	27.945811242677497
1975	27.589792110881344
1976	27.27223008110054
1977	27.00273584820075
1978	26.761619665161877
1979	26.611066738924652
1980	26.573346132388018
1981	26.592437603867825
1982	26.6351907108313
1983	26.678005889394814
1984	26.741137062346034
1985	26.81371267648124
1986	26.86219372662672
1987	26.881384857504827
1988	26.86582557441609
1989	26.792235664873647
1990	26.659891914950062
1991	26.477179193636406
1992	26.257890599492086
1993	26.002846847462585
1994	25.709272293134994
1995	25.37412431143806
1996	24.99279382414089
1997	24.546950035482688
1998	24.008030547049355
1999	23.4127538945842
2000	22.810887936479855
2001	22.182322242029997
2002	21.53342084701367
2003	20.95725732297896
2004	20.486109748991833
2005	20.074957745188893
2006	19.73929052981028
2007	19.505868581109194
2008	19.396562110104558
2009	19.360434724442264
2010	19.34954829490663
2011	19.37120859476074
2012	19.4493141307899
2013	19.568665197307585
2014	19.71887263853639
2015	19.892379954566515
2016	20.06578435809463
2017	20.221272468867028
2018	20.34555613940888
2019	20.429160589096906
2020	20.48308348600031
2021	20.53202781308019
2022	20.610364698812834
2023	20.518272583095246