Year	% of total population
1960	3.89629014324267
1961	3.78424201122783
1962	3.66478447239263
1963	3.54218785031738
1964	3.4214055053939
1965	3.30430459453365
1966	3.19017410692115
1967	3.07700356044916
1968	2.97028028515403
1969	2.87471579315572
1970	2.7878618239994
1971	2.71047433961068
1972	2.64176831489196
1973	2.56123794701098
1974	2.48211858593912
1975	2.42125241996652
1976	2.36337864253797
1977	2.30852893858517
1978	2.25743983617187
1979	2.21236902053339
1980	2.17357281353696
1981	2.13903136262167
1982	2.10987480005976
1983	2.08659061155788
1984	2.0695387230657
1985	2.05761126692219
1986	2.05039637710732
1987	2.0479228330136
1988	2.04710949565416
1989	2.04574796320431
1990	2.04449383392427
1991	2.04414814440141
1992	2.04357275556672
1993	2.04623701254996
1994	2.05523418258892
1995	2.06963436440501
1996	2.08889866699
1997	2.11354013318636
1998	2.14714539678839
1999	2.18892450154148
2000	2.23293115646458
2001	2.28429468266711
2002	2.34876352400343
2003	2.41876194894495
2004	2.4851125320617
2005	2.54681156135963
2006	2.60423500717265
2007	2.65728156527977
2008	2.70958041187838
2009	2.76295212748224
2010	2.81611150325704
2011	2.87016470819054
2012	2.92666797477439
2013	2.98005929290386
2014	3.03933968797216
2015	3.10341125271999
2016	3.16549437421526
2017	3.22919012160636
2018	3.29473453227432
2019	3.36622384592205
2020	3.43230163994652
2021	3.48436277611373
2022	3.53240869839499
2023	3.59332964702684