Year	% of total population
1960	3.4868495009106
1961	3.50853567032878
1962	3.540907720122001
1963	3.5679875054927472
1964	3.589316624708475
1965	3.6061885633245945
1966	3.610552351506356
1967	3.6029177867717146
1968	3.593088613582089
1969	3.580698871219252
1970	3.565932532306319
1971	3.5502332283931497
1972	3.534087951333476
1973	3.5167227584095073
1974	3.4965648438939527
1975	3.482156581132379
1976	3.4794456777037186
1977	3.4673274073629257
1978	3.438826874311406
1979	3.4097315989597337
1980	3.3836736069430904
1981	3.357887551851779
1982	3.3323350049310085
1983	3.310054750885706
1984	3.2962804302286686
1985	3.2904492928628217
1986	3.291595260358097
1987	3.298090514492077
1988	3.3056933650842573
1989	3.318042135968932
1990	3.32952654355342
1991	3.3545223866034584
1992	3.377495512313744
1993	3.4009879682838475
1994	3.424666156812326
1995	3.4498147181299617
1996	3.491583022978519
1997	3.549575143397037
1998	3.5910426541653093
1999	3.6142141839690445
2000	3.6327483234514615
2001	3.6475063149869293
2002	3.6602120737718513
2003	3.667602645732172
2004	3.6694034987939808
2005	3.662564802362179
2006	3.6450005953934017
2007	3.623468874492421
2008	3.606783749632101
2009	3.6012367807971644
2010	3.614591318577402
2011	3.652740085648469
2012	3.705761075075841
2013	3.764982070058419
2014	3.82825985945397
2015	3.897071271945674
2016	3.9725031180046164
2017	4.057329797276028
2018	4.151618602851859
2019	4.2523830782940495
2020	4.355763402971967
2021	4.453652479429607
2022	4.548083433363848
2023	4.654688346588579