Year	% of total population
1960	30.40056223538
1961	29.7760285516499
1962	29.0620216679148
1963	28.3659428194038
1964	27.7216355101259
1965	27.1443057181449
1966	26.6385393557731
1967	26.1505402250761
1968	25.6649239322916
1969	25.1732604272514
1970	24.6152874308522
1971	24.0048074504859
1972	23.4021454660741
1973	22.8655305946606
1974	22.4039115878306
1975	22.0112502356004
1976	21.6645667205161
1977	21.3373559228896
1978	20.9893527480852
1979	20.6292386454804
1980	20.308194428694
1981	20.0217068582443
1982	19.7734511103593
1983	19.5896273538928
1984	19.4797969374696
1985	19.410679953286
1986	19.3485690060688
1987	19.307865401816
1988	19.3362500395477
1989	19.3602666304359
1990	19.3167212970103
1991	19.2445372362259
1992	19.1769396252093
1993	19.1347756535195
1994	19.0913610914043
1995	19.0287949571873
1996	18.9306007734864
1997	18.773118570879
1998	18.5544143453113
1999	18.3338428041013
2000	18.1527929030686
2001	18.0015526206859
2002	17.8684152612907
2003	17.715815245342
2004	17.5455099623365
2005	17.3598775159543
2006	17.1663406440692
2007	16.9771468883877
2008	16.8042085685859
2009	16.6655053602719
2010	16.5571237629868
2011	16.4867971773698
2012	16.4429029683727
2013	16.4228645593116
2014	16.4027634106356
2015	16.3579045457208
2016	16.2889413506541
2017	16.2000526675114
2018	16.070388313869
2019	15.8772381564443
2020	15.6613258273671
2021	15.4286440442833
2022	15.1728770072547
2023	14.91327748419