Year	% of total population
1960	3.3118278697408963
1961	3.329756870755212
1962	3.3642765605522382
1963	3.407555687041053
1964	3.447603437882696
1965	3.477337007706827
1966	3.4969836259156515
1967	3.507548256392107
1968	3.514815245005339
1969	3.5262325638778664
1970	3.5425664172111397
1971	3.5586184903243834
1972	3.5844592823401955
1973	3.6244335017785625
1974	3.6671067080544395
1975	3.7112800978439218
1976	3.755341037459538
1977	3.7940097262160615
1978	3.8255523466404084
1979	3.8507269579003975
1980	3.8690791950030907
1981	3.882489972436352
1982	3.892549061747603
1983	3.899910740665539
1984	3.9063699808164363
1985	3.913292216937815
1986	3.921293187485252
1987	3.930335768433724
1988	3.940136802493931
1989	3.9510411568922676
1990	3.9654617725809156
1991	3.9843711951370446
1992	4.006430249531749
1993	4.030907591038935
1994	4.058253996560008
1995	4.0895560311347765
1996	4.124303324304237
1997	4.162516933247319
1998	4.205796387636597
1999	4.254441025576717
2000	4.304772522093653
2001	4.355387699472137
2002	4.408811422015025
2003	4.464319050831019
2004	4.518226294246852
2005	4.569450249294134
2006	4.620307571659816
2007	4.671476043755888
2008	4.7233933429353545
2009	4.7770068390822
2010	4.83468046039839
2011	4.899690059846952
2012	4.975636400495133
2013	5.064208623593017
2014	5.183870902094779
2015	5.336470682192469
2016	5.501819309995062
2017	5.677699711980116
2018	5.862883935113556
2019	6.053732536957862
2020	6.227644213261515
2021	6.346776027781363
2022	6.441637157745278
2023	6.600085662480082