Year	% of total population
1960	21.2150769554844
1961	21.2982535722386
1962	21.3051702679265
1963	21.2512232007828
1964	21.1668647387649
1965	21.1082276717291
1966	21.1129387853526
1967	21.1747423997275
1968	21.2708601851618
1969	21.3703303623935
1970	21.4835291978645
1971	21.5873184787413
1972	21.5541458075762
1973	21.3221440651752
1974	20.9365985050125
1975	20.421306643986
1976	19.9598591133587
1977	19.6221306650971
1978	19.2351978193268
1979	18.773489348888
1980	18.293302287786
1981	17.858143335149
1982	17.481136297005
1983	17.1349655986522
1984	16.8000968566975
1985	16.465091533095
1986	16.2285760912702
1987	16.1198115423002
1988	16.0439297211566
1989	16.0183871720745
1990	16.0481929424651
1991	16.2069562330236
1992	16.4891575682251
1993	16.738174803133
1994	16.925501261709
1995	17.0255226764965
1996	17.1233427922616
1997	17.2366830722717
1998	17.2802352109062
1999	17.2482252851974
2000	17.1372237305282
2001	17.0664320341815
2002	17.0439604121862
2003	16.9655827937563
2004	16.8288328050395
2005	16.6382558170385
2006	16.4168596694389
2007	16.2049802740423
2008	16.0041559988477
2009	15.8019791807142
2010	15.6271008236025
2011	15.5260139780381
2012	15.473045813606
2013	15.4060853348686
2014	15.3297599627127
2015	15.2484740119613
2016	15.1266021872509
2017	15.074599763944
2018	15.141876621746
2019	15.2485095330854
2020	15.3054277156841
2021	15.2594196897793
2022	15.1507927389706
2023	15.0268183282814