Year	% of total population
1960	4.12568515256611
1961	4.15862282282923
1962	4.17777777777778
1963	4.20029940725456
1964	4.22021774161852
1965	4.23226421843329
1966	4.24108382225019
1967	4.24643886151278
1968	4.24907467885913
1969	4.24647678699903
1970	4.25954261610355
1971	4.28504114841865
1972	4.30893853855135
1973	4.33891625615764
1974	4.36401803763023
1975	4.38070045336045
1976	4.39307267843697
1977	4.40179758119589
1978	4.39961851978479
1979	4.37973960591862
1980	4.34325756375187
1981	4.30917426259041
1982	4.28322567310878
1983	4.25176061978943
1984	4.22047125778308
1985	4.19979625114341
1986	4.18232984332337
1987	4.16306000701837
1988	4.14661003618059
1989	4.14226515085803
1990	4.15522250731833
1991	4.15796290387024
1992	4.09328453306498
1993	3.98709421582941
1994	3.91173090879768
1995	3.87975819981185
1996	3.88699988801018
1997	3.91010376893564
1998	3.92451102011053
1999	3.9341134817291
2000	3.94332920143424
2001	3.93934691524973
2002	3.92031626606039
2003	3.90362805778832
2004	3.89283004168986
2005	3.88693713776193
2006	3.88997314095027
2007	3.89789129919054
2008	3.91416929612345
2009	3.94721974214638
2010	3.98051576109144
2011	4.01031749042218
2012	4.05611480482645
2013	4.12097914777878
2014	4.19487135822442
2015	4.27389258928894
2016	4.36154500595542
2017	4.45524141731842
2018	4.55327090083912
2019	4.66171500533289
2020	4.80565075755753
2021	4.95586592039117
2022	5.08682429723211
2023	5.24590762490111