Year	% of total population
1960	2.37152977853732
1961	2.38448513851181
1962	2.39576348571276
1963	2.40517546990481
1964	2.41285833411337
1965	2.41945607393014
1966	2.42533175657797
1967	2.43060678073136
1968	2.43534468035476
1969	2.43992153599465
1970	2.44459371278815
1971	2.44885918836721
1972	2.45278227727848
1973	2.45567928072046
1974	2.45765582694621
1975	2.45969459209181
1976	2.49255532579462
1977	2.53509351528473
1978	2.54496390090583
1979	2.53429416115578
1980	2.51340649653593
1981	2.49055238623036
1982	2.4692006481586
1983	2.45073542747909
1984	2.43944634070837
1985	2.4363877228945
1986	2.4388570087221
1987	2.46082934226511
1988	2.52701822742752
1989	2.59120192781208
1990	2.62483050202466
1991	2.65207264875556
1992	2.67325610953495
1993	2.68955730537152
1994	2.70150196145059
1995	2.70854481028011
1996	2.71054597052747
1997	2.70713220186152
1998	2.68769007357972
1999	2.64760985235803
2000	2.60120585701981
2001	2.55832423456632
2002	2.53569391407335
2003	2.53047906568455
2004	2.52464794570907
2005	2.51833202733865
2006	2.51251962102309
2007	2.50900451341466
2008	2.50823071281835
2009	2.50980739598415
2010	2.51273648035359
2011	2.49409472207699
2012	2.45653349279509
2013	2.42225297286616
2014	2.39565206415648
2015	2.38095167464015
2016	2.37559466269843
2017	2.37795851342736
2018	2.38685484619247
2019	2.40097820250929
2020	2.40883203976997
2021	2.40308798424528
2022	2.39593928277483
2023	2.40423126998415