Year	% of total population
1960	25.3196571497663
1961	25.1396153791487
1962	24.8127658102077
1963	24.3411574374212
1964	23.8434114265491
1965	23.3310933838064
1966	22.8378928415
1967	22.4290233600032
1968	22.0039401277076
1969	21.4305278578085
1970	20.83196563263
1971	20.3691131424127
1972	20.1062831942241
1973	20.0131002246432
1974	20.1156928793003
1975	20.4144697697623
1976	20.7634658515423
1977	21.1288694792093
1978	21.4676805006947
1979	21.7419860971692
1980	21.9434894719245
1981	22.0629888527071
1982	22.0708978624388
1983	21.9565058967507
1984	21.7938226748341
1985	21.6511159393876
1986	21.5347525150936
1987	21.3876905979138
1988	21.1807194286939
1989	20.7978563402694
1990	20.2339641920416
1991	19.7009237912018
1992	19.2515897086618
1993	18.8475064809814
1994	18.488989148976
1995	18.1777252711888
1996	17.8885297650648
1997	17.6107889973187
1998	17.3575559378349
1999	17.1059746696466
2000	16.8202827763622
2001	16.4978819419029
2002	16.2284474062245
2003	16.0102547305996
2004	15.7801642826521
2005	15.5515663309732
2006	15.3282730419543
2007	15.1302614440954
2008	14.9721804038705
2009	14.8349373654873
2010	14.6900241067607
2011	14.5559219408304
2012	14.468838183587
2013	14.4358670166811
2014	14.4563367630056
2015	14.4841463734246
2016	14.5051486716214
2017	14.5309947214923
2018	14.5441489839135
2019	14.5483703583441
2020	14.5570170366919
2021	14.553461837367
2022	14.4414928505015
2023	14.3803084980572