Year	% of total population
1960	2.3881505319068195
1961	2.3963593401303984
1962	2.403112213734913
1963	2.408676301002274
1964	2.413115127814192
1965	2.416155515238779
1966	2.4213357858855695
1967	2.4259012768354
1968	2.4755352705754095
1969	2.5254529649200728
1970	2.576090373101887
1971	2.6285074630250853
1972	2.684116276131994
1973	2.7414619697014913
1974	2.8029084672608473
1975	2.870232934627688
1976	2.9369961166547336
1977	3.0224764978609002
1978	3.1179951933889614
1979	3.2233542545442346
1980	3.3630454351607075
1981	3.4411663313310727
1982	3.474082570218738
1983	3.546487166389431
1984	3.623452250586628
1985	3.6646931505798603
1986	3.7015644968416472
1987	3.7219350332121355
1988	3.7244681081221707
1989	3.7297833485590535
1990	3.740459646318681
1991	3.727430506535879
1992	3.7199157710227233
1993	3.7382533861375418
1994	3.757727564176267
1995	3.730725873946196
1996	3.6883179652154374
1997	3.6489368234501782
1998	3.612522475709888
1999	3.577628479387655
2000	3.54562852918896
2001	3.515035555751573
2002	3.48439704043218
2003	3.454959883331754
2004	3.4270170502059294
2005	3.400222073232534
2006	3.3741668606449533
2007	3.3543902073004985
2008	3.402985439104388
2009	3.4530883516029545
2010	3.503525765222046
2011	3.553657804675599
2012	3.6055361028458273
2013	3.6605955690126257
2014	3.718358147070152
2015	3.777411357523934
2016	3.8368345968080684
2017	3.896529462896478
2018	3.9590535857834537
2019	4.023798719449357
2020	4.090504083546206
2021	4.1614550003090205
2022	4.237151256471839
2023	4.315749532155414