Year	% of total population
1960	3.70334777987467
1961	3.75577343937416
1962	3.80189799744761
1963	3.84424865047916
1964	3.88459604474339
1965	3.92418740976089
1966	3.96112754723057
1967	3.99311271449445
1968	4.02059152656095
1969	4.04467972733815
1970	4.06639235704356
1971	4.08868755498286
1972	4.11175046054284
1973	4.13358955822461
1974	4.15397032264999
1975	4.17285403326039
1976	4.19078131517929
1977	4.20372756667536
1978	4.21115359116596
1979	4.21657484539127
1980	4.22032220012384
1981	4.22020165114044
1982	4.2159351714541
1983	4.21026123321183
1984	4.20498884850727
1985	4.20064872295646
1986	4.1973803325287
1987	4.19782769046537
1988	4.20411295012016
1989	4.21608618020891
1990	4.23306150688153
1991	4.25725740505644
1992	4.28244581327734
1993	4.30528475681875
1994	4.33016459339848
1995	4.35800338359769
1996	4.38914503342818
1997	4.42218333914644
1998	4.45134045538943
1999	4.47033179532375
2000	4.47590179768368
2001	4.47136372709895
2002	4.45938885814333
2003	4.43057305714873
2004	4.38286074546441
2005	4.32507949905653
2006	4.26511050004986
2007	4.20897273250505
2008	4.16476063969753
2009	4.14103562583172
2010	4.14198628442524
2011	4.17120095016983
2012	4.22767545243525
2013	4.28721454143366
2014	4.3307875849948
2015	4.36391141713551
2016	4.40453148867876
2017	4.46587773142613
2018	4.54272578121664
2019	4.62764438685278
2020	4.70870905907027
2021	4.77454469548715
2022	4.83381702961389
2023	4.9113551807545