Year	% of total population
1960	35.8786734332586
1961	36.5659961741348
1962	37.2712808273667
1963	37.9264288496856
1964	38.4560867906013
1965	38.7539373231541
1966	38.9275074478649
1967	38.9949337290824
1968	38.9389840697325
1969	38.7781160986151
1970	38.3669594113458
1971	37.6630385895475
1972	36.814399728307
1973	35.9117576147231
1974	34.9100472633023
1975	33.8662896091654
1976	32.8110407803258
1977	31.7124805663061
1978	30.5845743498555
1979	29.4336742482064
1980	28.5730994152047
1981	27.9741957104558
1982	27.321995888619
1983	26.653552359298
1984	25.9940783517263
1985	25.3560117302053
1986	24.7212272757992
1987	24.067693774513
1988	23.4580785205903
1989	22.9307296689167
1990	22.4378061665546
1991	21.95278067336
1992	21.515875368333
1993	21.1545183680943
1994	20.8546192408689
1995	20.60697518444
1996	20.3883779080819
1997	20.1734169032294
1998	19.9382891478218
1999	19.7166731949341
2000	19.6590894764048
2001	19.6714123908463
2002	19.6071272949961
2003	19.5018523795953
2004	19.3523456217637
2005	19.1732742662087
2006	18.9748220105029
2007	18.7725340906802
2008	18.5767658392504
2009	18.3949126926038
2010	18.274200856242
2011	18.2035248324083
2012	18.083890256771
2013	17.895794681509
2014	17.6957496285227
2015	17.5042274794372
2016	17.3465371981142
2017	17.2402132712603
2018	17.1529190555453
2019	17.0479632261772
2020	16.8896383179444
2021	16.7848127274862
2022	16.7643056232762
2023	16.7169239647958