Year	% of total population
1960	2.9725680394760126
1961	2.9539411360153793
1962	2.9353320082025567
1963	2.9183924540370416
1964	2.9046703330511385
1965	2.8945128888086264
1966	2.887475268079381
1967	2.8843130829941583
1968	2.8845127172369605
1969	2.8860662819931413
1970	2.8882898178505703
1971	2.8921878037277433
1972	2.896530950667628
1973	2.901347411988536
1974	2.9057988886758044
1975	2.909034247253468
1976	2.913913666873689
1977	2.9195378896061404
1978	2.926794766856411
1979	2.9359596552394223
1980	2.938941857998664
1981	2.9386437147909317
1982	2.9395099006977046
1983	2.935355460958596
1984	2.929738860748436
1985	2.9274100574036765
1986	2.92402198606717
1987	2.9236444731140394
1988	2.919108532669417
1989	2.909101100168932
1990	2.902833829247124
1991	2.90050344569217
1992	2.899804201063738
1993	2.895772576952868
1994	2.8870529530559437
1995	2.8768716631568974
1996	2.8711475252205543
1997	2.8668980814145573
1998	2.8608353346900377
1999	2.856606795369755
2000	2.8566599589115684
2001	2.8585516554174673
2002	2.860163415274437
2003	2.8606087550354773
2004	2.861410764564756
2005	2.863970227132043
2006	2.8668538662095657
2007	2.869570555353922
2008	2.87212003031023
2009	2.878087229146727
2010	2.8916110108205335
2011	2.9121627060339272
2012	2.9364529248353293
2013	2.961488394303747
2014	2.988270716977686
2015	3.015481855416896
2016	3.045320561558564
2017	3.078671309736247
2018	3.1129506505651015
2019	3.146365084781569
2020	3.16669494525835
2021	3.165338866974599
2022	3.1551758436630735
2023	3.1584688813056307