Year	% of total population
1960	3.32732798883898
1961	3.32986463585048
1962	3.30595114192584
1963	3.29287920309713
1964	3.29290872424651
1965	3.30809779954861
1966	3.33656996476394
1967	3.3743442293292
1968	3.41630618454643
1969	3.45650610451353
1970	3.49239253808694
1971	3.5120292868714
1972	3.51595963121552
1973	3.5194840693251
1974	3.52663445395523
1975	3.53995060284513
1976	3.56020317098012
1977	3.58435625930878
1978	3.60840401843071
1979	3.62958491637965
1980	3.64602843445984
1981	3.66205113340499
1982	3.67824318578418
1983	3.69341157350754
1984	3.71214434921335
1985	3.73930172091356
1986	3.7771890468284
1987	3.82477276908442
1988	3.87606302327115
1989	3.92151914538111
1990	3.95186025204904
1991	3.96453954561001
1992	3.95115154671556
1993	3.91808236063275
1994	3.88428462029015
1995	3.84879661083466
1996	3.81536963031329
1997	3.79125833707401
1998	3.7807099676026
1999	3.7828456994198
2000	3.79421145614722
2001	3.8144429623478
2002	3.8384976921008
2003	3.88522164216832
2004	3.95693458061912
2005	4.03207017423777
2006	4.11159497209466
2007	4.20014500579296
2008	4.29901213286481
2009	4.40913773963139
2010	4.53584318884818
2011	4.68484205151633
2012	4.83859477449238
2013	4.9809310823024
2014	5.12631221583912
2015	5.28104144068257
2016	5.44107592410356
2017	5.60588115065535
2018	5.70613636421502
2019	5.84799055527804
2020	6.04708718743806
2021	6.16455807906613
2022	6.27654253513708
2023	6.4666135845885