Year	% of total population
1960	3.79216277563833
1961	3.75814859660876
1962	3.73172385002228
1963	3.75215045867871
1964	3.80791930515965
1965	3.85056413364698
1966	3.88202399411646
1967	3.90467352222126
1968	3.92037054816331
1969	3.93028388119939
1970	3.93530103228327
1971	3.92626848939656
1972	3.89389999952409
1973	3.9160183488476
1974	3.9831651770668
1975	4.04228663289453
1976	4.12116331183025
1977	4.21200446426302
1978	4.29925077880022
1979	4.3627340664763
1980	4.38620779252415
1981	4.37388308850981
1982	4.30348510776819
1983	4.19434348310707
1984	4.1000124494894
1985	4.02613719481668
1986	3.97376037086633
1987	3.9417226378729
1988	3.92815645047636
1989	3.93137630058857
1990	3.95174461337095
1991	3.98818760862534
1992	4.03695162426733
1993	4.09155849315176
1994	4.14209147039414
1995	4.18086381661529
1996	4.205305332701
1997	4.21614394653372
1998	4.21928771687412
1999	4.22550119567508
2000	4.2435534900823
2001	4.27978020320669
2002	4.33511696037794
2003	4.40466676903431
2004	4.48020691526272
2005	4.55808035161638
2006	4.64670463938714
2007	4.74999349301257
2008	4.85989029871316
2009	4.96857165127786
2010	5.06873186576495
2011	5.15943999068436
2012	5.24878606970886
2013	5.34755427054381
2014	5.45785137752985
2015	5.57036719300091
2016	5.68444002986939
2017	5.80245567394299
2018	5.92137324066073
2019	6.04212708784566
2020	6.16223439817064
2021	6.22844599010203
2022	6.258863334171
2023	6.36460692730995