Year	% of total population
1960	3.06653985497589
1961	3.01917324555529
1962	2.97077135418929
1963	2.90770965456106
1964	2.84865708917762
1965	2.79639218710138
1966	2.72072847027208
1967	2.63982377172883
1968	2.56974453701646
1969	2.50477642890446
1970	2.44456880582705
1971	2.40974762188502
1972	2.39768673580464
1973	2.40017863265006
1974	2.41462681167955
1975	2.42926902472891
1976	2.44451066857637
1977	2.46173876297457
1978	2.48128649511964
1979	2.50087226519207
1980	2.52103285963876
1981	2.54227775156467
1982	2.56344642444037
1983	2.57984324851234
1984	2.58839866444755
1985	2.59251430058583
1986	2.59560463409609
1987	2.59099840134734
1988	2.50884809358657
1989	2.43450429612469
1990	2.44490579199325
1991	2.45624524237316
1992	2.46211949277875
1993	2.46233065921907
1994	2.47271801718226
1995	2.48603250539768
1996	2.49084894755997
1997	2.49418073694891
1998	2.46928818921732
1999	2.44607612289952
2000	2.45134448523949
2001	2.45461245887242
2002	2.45558714763368
2003	2.45677179129757
2004	2.46012859572092
2005	2.46508569582512
2006	2.47189837196932
2007	2.48070091760666
2008	2.49016065876172
2009	2.49951065779998
2010	2.50948602744611
2011	2.5179804843284
2012	2.52515872736654
2013	2.52841901845943
2014	2.5303826011014
2015	2.53779613454151
2016	2.56188152922822
2017	2.61387789177476
2018	2.68112232517497
2019	2.74525908466063
2020	2.80060006258588
2021	2.84682492000459
2022	2.89029849135862
2023	2.94167644530569