Year	% of total population
1960	34.8904830933008
1961	34.9625603628614
1962	34.9399307620831
1963	34.8415071689846
1964	34.7109514026056
1965	34.515805292524
1966	34.2828868130547
1967	34.0366485428392
1968	33.6507487429953
1969	33.1594840093048
1970	32.6327347066534
1971	32.0918072861848
1972	31.6055662050471
1973	31.1806059122115
1974	30.6761860080546
1975	30.067937056764
1976	29.5208279888942
1977	28.9763009466552
1978	28.3834359531571
1979	27.8964636289976
1980	27.5272383172043
1981	27.1727549137655
1982	26.8727390056646
1983	26.6782354938083
1984	26.4740181035688
1985	26.214775796587
1986	25.9222048266538
1987	25.5628829524555
1988	25.2364289672751
1989	25.0599210011006
1990	24.9637772797766
1991	24.8413704354028
1992	24.8208219702407
1993	24.8585333694538
1994	24.7174846792838
1995	24.4287043159582
1996	24.1416530273672
1997	23.865924958219
1998	23.5938895674207
1999	23.4010863535836
2000	23.2875130568247
2001	23.1820444681284
2002	23.0234400517029
2003	22.7768365188526
2004	22.4749923467774
2005	22.0544493205197
2006	21.5287244241056
2007	21.0900648703075
2008	20.8764143965504
2009	20.8856322370887
2010	20.91646169263
2011	20.8197486321341
2012	20.6899506043221
2013	20.5754503131708
2014	20.428606091682
2015	20.1761314808969
2016	19.8698441496152
2017	19.5348512362062
2018	19.160013146487
2019	18.8547139556704
2020	18.7095173030717
2021	18.6286740383707
2022	18.4862636883763
2023	18.3073842616338