Year	% of total population
1960	12.2102821053074
1961	12.4031984206473
1962	12.5951908600503
1963	12.7628907432785
1964	12.965663863153
1965	13.1654297837876
1966	13.3583329457451
1967	13.5583206830007
1968	13.7398082065249
1969	13.9070172173585
1970	14.054812662933
1971	14.1916416934735
1972	14.3190861085083
1973	14.449845052543
1974	14.6300452525497
1975	14.8485150838216
1976	15.0173434653996
1977	15.1680636840075
1978	15.3180206101677
1979	15.4295254270928
1980	15.3827696534834
1981	15.0850813602629
1982	14.7037974643419
1983	14.341886809426
1984	14.1310335133169
1985	14.1611667161568
1986	14.318526740598
1987	14.5250313986508
1988	14.7246672676438
1989	14.8647585394134
1990	14.9427919646598
1991	14.95112974587
1992	14.9139952452656
1993	14.9212409052054
1994	15.001880820857
1995	15.1170734748695
1996	15.2197444069464
1997	15.3045031606886
1998	15.3712100334735
1999	15.4002817912534
2000	15.413033147977
2001	15.4347425760068
2002	15.433002037878
2003	15.4469696447238
2004	15.7088972003128
2005	16.1893814836926
2006	16.656826238438
2007	17.0045481934175
2008	17.2586925227657
2009	17.509070997852
2010	17.6356410013884
2011	17.7144340329413
2012	17.9292665822542
2013	18.1800272396884
2014	18.369845164421
2015	18.4446059732568
2016	18.4850626164191
2017	18.5968996178003
2018	18.7505079598044
2019	18.9301120801555
2020	19.1494297623302
2021	19.4411573442163
2022	19.8070286456344
2023	20.2099674398609