Year	% of total population
1960	3.97173723274391
1961	3.98717217665696
1962	3.97535905772278
1963	3.97582080609062
1964	3.99606760934527
1965	4.03470685792832
1966	4.05460963873799
1967	4.03013708186543
1968	3.9796083633475
1969	3.95999520309859
1970	3.96366171592758
1971	3.99031793864271
1972	4.04253712559778
1973	4.09505589328966
1974	4.24335144661713
1975	4.44851740089792
1976	4.60110753534869
1977	4.70346114358847
1978	4.76414984480602
1979	4.75049552792514
1980	4.76347399912804
1981	4.85391564304456
1982	4.93740315234918
1983	5.01447452958495
1984	5.08198117939381
1985	5.1383864688786
1986	5.18497247360173
1987	5.22243453309321
1988	5.25178418150326
1989	5.27420612185478
1990	5.2921240346546
1991	5.1788715764012
1992	4.94982669447637
1993	4.74085436536738
1994	4.54691877971801
1995	4.36721618442888
1996	4.19952753123453
1997	4.03753303926861
1998	3.88097504288172
1999	3.73290265683305
2000	3.59556696231626
2001	3.46812419475417
2002	3.3476124455783
2003	3.23303210153737
2004	3.12585142341291
2005	3.02675376210624
2006	2.93623149562811
2007	2.8555277312923
2008	2.78524742321027
2009	2.72695931856792
2010	2.68054176167297
2011	2.64559044435205
2012	2.62283179067203
2013	2.61236546551986
2014	2.61353552353599
2015	2.62672597250071
2016	2.65154725828084
2017	2.68543400148897
2018	2.72549299217202
2019	2.76887614621282
2020	2.79939558335334
2021	2.81180712964055
2022	2.81955132718502
2023	2.83598237341469