Year	% of total population
1960	4.88558485387682
1961	5.133641230183601
1962	5.385290364415245
1963	5.635548864751622
1964	5.866315483115337
1965	6.089267260769681
1966	6.3240073806359876
1967	6.5743881388631
1968	6.8389608724759885
1969	7.1249961337946655
1970	7.417479331925852
1971	7.716227708361631
1972	8.054453295420704
1973	8.384877306388717
1974	8.709724843346962
1975	9.043977533451706
1976	9.377488921127425
1977	9.693210602538237
1978	9.999597626891557
1979	10.257608677621743
1980	10.527120356624177
1981	10.806708153030355
1982	11.094476218026026
1983	11.417486413734867
1984	11.683120301799528
1985	11.95780433248423
1986	12.227180526503268
1987	12.498017475735342
1988	12.7689628799291
1989	13.023515129001556
1990	13.30839351514189
1991	13.58698028889833
1992	13.60836056561542
1993	13.646527517205028
1994	13.715641006691923
1995	13.790858018363112
1996	14.093716329295964
1997	14.226469280574738
1998	14.36440979057064
1999	14.508033952780686
2000	14.690578230882108
2001	14.865511494187576
2002	15.04387625611572
2003	15.227105657867318
2004	15.416649003247294
2005	15.526837401641817
2006	15.625290540359382
2007	15.69725819504816
2008	15.781030862326345
2009	15.889004423053054
2010	15.991619324505242
2011	16.09559184600021
2012	16.207628279998417
2013	16.329597361618056
2014	16.455757219879942
2015	16.59090381125704
2016	16.73375894330497
2017	16.881300024014823
2018	17.038834682995542
2019	17.17460317690278
2020	17.321358427322284
2021	17.48353423939869
2022	17.66161105857853
2023	17.849897107408626