Year	% of total population
1960	3.16992321122278
1961	3.20476293533288
1962	3.23490176002435
1963	3.2613622077449
1964	3.2842802126342
1965	3.30359330192082
1966	3.3205761457987
1967	3.33559571607755
1968	3.34842685750845
1969	3.35930424027201
1970	3.36799985595181
1971	3.37559897642697
1972	3.38147125716891
1973	3.38477441964073
1974	3.38225852151195
1975	3.37478074762856
1976	3.36786901224082
1977	3.362666184216
1978	3.35628857633051
1979	3.34704675499042
1980	3.33438641626544
1981	3.31743987890017
1982	3.29709222664385
1983	3.27419738468604
1984	3.24949546786597
1985	3.22347611549237
1986	3.19631576913284
1987	3.16854391252086
1988	3.1299590906228
1989	3.08729680196288
1990	3.05185862944719
1991	2.9694915183749
1992	2.84221341425045
1993	2.77490590537688
1994	2.75544145951298
1995	2.73376665700541
1996	2.71146009675541
1997	2.6854679917919
1998	2.65965831362136
1999	2.63813052665526
2000	2.62060903758715
2001	2.60803217199201
2002	2.60076330058035
2003	2.59475017140571
2004	2.58352615794969
2005	2.56614127130494
2006	2.54600081057227
2007	2.52421458645962
2008	2.50281578134202
2009	2.48413964934637
2010	2.46768644916442
2011	2.45450592266616
2012	2.44948555007781
2013	2.45067393581864
2014	2.45872884504632
2015	2.48510115932566
2016	2.52007525162761
2017	2.55055074867361
2018	2.57990777876988
2019	2.60792918573804
2020	2.6158408087602
2021	2.59659193554559
2022	2.570008338111
2023	2.55322072457453