Year	% of total population
1960	3.99643409892899
1961	3.98086639804875
1962	3.97672796067265
1963	3.97829420998783
1964	3.97830219718282
1965	3.97164495923375
1966	3.96040914900679
1967	3.94690184447395
1968	3.93161448010503
1969	3.9158845022408
1970	3.89919926792704
1971	3.87924383308793
1972	3.8556641375986
1973	3.83012158870731
1974	3.80358047418117
1975	3.77753047787645
1976	3.75564654917192
1977	3.73849459402517
1978	3.72357251809647
1979	3.70657846503542
1980	3.72025775881224
1981	3.74144024646511
1982	3.70141434003324
1983	3.65010634010084
1984	3.6389278326547
1985	3.6362002134033
1986	3.6109656595339
1987	3.57228422902582
1988	3.52776143444565
1989	3.48020207317755
1990	3.43525192511021
1991	3.37807886349007
1992	3.30960546660349
1993	3.25294471913869
1994	3.19862805975157
1995	3.13014962135948
1996	3.05963349673183
1997	2.99514526752164
1998	2.93155569737901
1999	2.86760439790631
2000	2.8050933166504
2001	2.74488675463215
2002	2.68688163431973
2003	2.62916351959024
2004	2.56903232879836
2005	2.50637880294396
2006	2.44417262691819
2007	2.38522723362173
2008	2.33029849358445
2009	2.27877160031621
2010	2.2303075976439
2011	2.18580443856926
2012	2.14381038950816
2013	2.10448221204483
2014	2.06063308684731
2015	2.03205751175684
2016	2.02760511588591
2017	2.0271367591054
2018	2.02978234719989
2019	2.0349707128465
2020	2.03263783372745
2021	2.02032452179137
2022	2.00828970224503
2023	2.00594767615132