Year	% of total population
1960	2.94262419364766
1961	2.91230884559469
1962	2.87859694547381
1963	2.83823841354071
1964	2.79565569314304
1965	2.75541449978485
1966	2.71641969740792
1967	2.67999612421879
1968	2.64752947426564
1969	2.61810782184624
1970	2.59096572813294
1971	2.56766242568614
1972	2.55026017519735
1973	2.54057250153594
1974	2.52786617210883
1975	2.51033456569338
1976	2.49679946495123
1977	2.48470432497833
1978	2.47170918250595
1979	2.45891912397735
1980	2.44681318103976
1981	2.43495643844155
1982	2.42564641462319
1983	2.41506156095007
1984	2.42726680812322
1985	2.46888186368784
1986	2.52311853416118
1987	2.57066404805034
1988	2.58242489049172
1989	2.60589595616213
1990	2.65955873072378
1991	2.71185250887364
1992	2.75169817603115
1993	2.75618409952583
1994	2.7483423246264
1995	2.73623670182505
1996	2.70435429874239
1997	2.66347669856335
1998	2.60812350178409
1999	2.55428088501586
2000	2.51351840635303
2001	2.47420947741483
2002	2.43765414675304
2003	2.40467754470125
2004	2.37312254063903
2005	2.34618974527495
2006	2.33147474504515
2007	2.32996441973004
2008	2.3395754299804
2009	2.36301243574944
2010	2.40173565252782
2011	2.45585334610492
2012	2.52613553572786
2013	2.60839024722037
2014	2.69609601395899
2015	2.79261488864714
2016	2.89815527368156
2017	3.00731237113392
2018	3.11995323514272
2019	3.23432640654247
2020	3.3379844225826
2021	3.42404253576514
2022	3.49951649312274
2023	3.57141758447472