Year	% of total population
1960	38.401808392620936
1961	37.91897062837137
1962	37.4229774845441
1963	36.861083503791484
1964	36.30018908942554
1965	35.74062705741029
1966	35.182518367639624
1967	34.63063872147607
1968	34.12460143063446
1969	33.6930295845929
1970	33.27172421530641
1971	32.87153739026875
1972	32.530814421020246
1973	32.21220685419699
1974	31.905051078994248
1975	31.64488412882169
1976	31.4161676702291
1977	31.166851194317825
1978	30.91556595066432
1979	30.665646423197586
1980	30.41720660840604
1981	30.172278504495587
1982	30.01415250426755
1983	29.902562033127104
1984	29.831284323228612
1985	29.775096131650375
1986	29.682615622827335
1987	29.51156952418881
1988	29.349605905864117
1989	29.237996962603532
1990	29.08725931175763
1991	28.912992000771546
1992	28.75443397050274
1993	28.5896229211651
1994	28.408878598111507
1995	28.22766922662845
1996	28.046418062695693
1997	27.869999913002477
1998	27.696819792170455
1999	27.517998562709614
2000	27.325458869075995
2001	27.109303022316805
2002	26.86567831703958
2003	26.61485665101858
2004	26.369089393589878
2005	26.126041351206442
2006	25.888000331241606
2007	25.658647519774803
2008	25.431645993408225
2009	25.203646061179292
2010	24.972585705565844
2011	24.745800891600588
2012	24.530247990245684
2013	24.32339238451875
2014	24.122426963066435
2015	23.908306308996153
2016	23.691837293505955
2017	23.470464425974374
2018	23.24395266954511
2019	23.00284256590409
2020	22.768376883431095
2021	22.524035740419695
2022	22.28035107956284
2023	22.033235103818186