Year	% of total population
1960	3.65234389353087
1961	3.73262499090314
1962	3.85069044879171
1963	3.96812408837027
1964	4.08496732026144
1965	4.19492677350323
1966	4.29740791268759
1967	4.39753140122886
1968	4.49366792215525
1969	4.58588342021707
1970	4.62665790185994
1971	4.63673541514149
1972	4.66134718871776
1973	4.68886409933068
1974	4.71023530389956
1975	4.70957431352608
1976	4.68732260042235
1977	4.64678457125771
1978	4.60292363895379
1979	4.58020890888521
1980	4.59932105750437
1981	4.66622970656449
1982	4.68535590970113
1983	4.63665190770535
1984	4.59247633903366
1985	4.54941983171837
1986	4.49817145636503
1987	4.44404623241645
1988	4.39950049339376
1989	4.35908024641426
1990	4.32513731583889
1991	4.32306392382438
1992	4.34109575958233
1993	4.35786615905509
1994	4.37145087474936
1995	4.37754082223074
1996	4.37662697313764
1997	4.36377637008194
1998	4.33795099059658
1999	4.30546936703148
2000	4.26577878904904
2001	4.20694936345362
2002	4.14604765702426
2003	4.10083148252326
2004	4.06158646011021
2005	4.01749128682803
2006	3.96350569770915
2007	3.90239307130934
2008	3.83296887706282
2009	3.75741040150903
2010	3.6826371140643
2011	3.60800776158392
2012	3.55483363125874
2013	3.53122725888613
2014	3.52359782680243
2015	3.53588715391289
2016	3.56956983861312
2017	3.62436399381839
2018	3.69657998334469
2019	3.77424871504527
2020	3.78863067768625
2021	3.76007081787927
2022	3.76023344232879
2023	3.77713705303519