Year	% of total population
1960	2.81983577377906
1961	2.78327497968152
1962	2.74868789493366
1963	2.71532238041029
1964	2.6842662347515
1965	2.65516309943757
1966	2.62726529419973
1967	2.60102436979385
1968	2.57659130854612
1969	2.55493177887594
1970	2.5365194052554
1971	2.52094953890344
1972	2.50846951998285
1973	2.4992072379808
1974	2.49317074016404
1975	2.49023514905226
1976	2.49000523946644
1977	2.49346075291468
1978	2.5001384298428
1979	2.50915757157591
1980	2.51984114418647
1981	2.53106458604909
1982	2.54339478899892
1983	2.55748578534066
1984	2.57396959171321
1985	2.59369195876777
1986	2.61664952222533
1987	2.64270525914019
1988	2.67169246997143
1989	2.70190042820823
1990	2.73642300321866
1991	2.77694412569512
1992	2.82468392678772
1993	2.86529430037405
1994	2.90394124847001
1995	2.92978858674855
1996	2.95202430486466
1997	2.99263253302007
1998	3.03811833670684
1999	3.06907367843473
2000	3.10232922301353
2001	3.14534166637387
2002	3.18425593854812
2003	3.21511289046976
2004	3.24073395498128
2005	3.27642234505243
2006	3.32449334101364
2007	3.38006966450143
2008	3.42841240157709
2009	3.47968214150449
2010	3.53914110086421
2011	3.60327288258713
2012	3.6742343654115
2013	3.73459629950184
2014	3.79871668534719
2015	3.84822661995218
2016	3.87411179579754
2017	3.90656807184599
2018	3.93691600143903
2019	3.96906898272502
2020	3.99657692580264
2021	4.00741704029929
2022	4.01325287256637
2023	4.03310142984552