Year	% of total population
1960	2.34058645566674
1961	2.36976380775284
1962	2.39792959773201
1963	2.4260264154807
1964	2.45228034387294
1965	2.47675172264794
1966	2.49882479934537
1967	2.51716624851446
1968	2.53548265814456
1969	2.5566880862693
1970	2.58036140990033
1971	2.60106986545631
1972	2.62112331262539
1973	2.64286499761739
1974	2.66446869987303
1975	2.68552100737601
1976	2.70470641593692
1977	2.72539586893602
1978	2.74652060698572
1979	2.76567081385213
1980	2.78615085107105
1981	2.80868755053968
1982	2.83081298752499
1983	2.85294329601836
1984	2.87735521965478
1985	2.90347858420949
1986	2.92892403817712
1987	2.9530901758234
1988	2.9766563384691
1989	3.00074745228155
1990	3.02448050716119
1991	3.04898324797421
1992	3.0766379464583
1993	3.10635676720975
1994	3.13331274985866
1995	3.16231178086413
1996	3.18832418882213
1997	3.19144156960463
1998	3.183531917343
1999	3.1895920185829
2000	3.20525044388217
2001	3.22120261453277
2002	3.24079031488534
2003	3.28393337888496
2004	3.34554048092985
2005	3.40718639628867
2006	3.46037205419705
2007	3.51111193301865
2008	3.56852413561887
2009	3.63238164782494
2010	3.70528922176307
2011	3.78459677811041
2012	3.86939488932423
2013	3.9615539965166
2014	4.05849235633082
2015	4.14714303176419
2016	4.21856973999315
2017	4.28005277666291
2018	4.34119247293317
2019	4.40491287660825
2020	4.45748131460085
2021	4.49546948033006
2022	4.53593862149969
2023	4.59358469696763