Year	% of working-age population
1960	41.12414097052889
1961	40.53378586720575
1962	39.87592697798342
1963	39.42394642130414
1964	39.19333146264409
1965	39.117255279174586
1966	39.138050851107124
1967	39.158501073216264
1968	39.128322796091766
1969	39.131992879156535
1970	39.083548849391335
1971	38.947207753333096
1972	38.80720431527514
1973	38.62679898480559
1974	38.36972809672524
1975	38.059843872361384
1976	37.64925512392632
1977	37.13280129408122
1978	36.5542318508006
1979	35.89126059202063
1980	35.148661039791044
1981	34.35922073498964
1982	33.57119579436321
1983	32.75907915719833
1984	31.8827175273296
1985	31.12899497142883
1986	30.48570461050386
1987	29.867065825318306
1988	29.44412318115238
1989	29.261297537025342
1990	29.251369259976972
1991	29.36757544538715
1992	29.56896582834418
1993	29.796236703091765
1994	29.988427933725823
1995	30.166388310905035
1996	30.358132681745936
1997	30.526805025467656
1998	30.644296862643365
1999	30.76805614948728
2000	30.86258118360632
2001	30.843383848511756
2002	30.736184153981398
2003	30.546499623727293
2004	30.270964196345584
2005	29.918831618109287
2006	29.521437800398072
2007	29.125063723454183
2008	28.79797198405745
2009	28.59399131115768
2010	28.41332391722474
2011	28.170952655159336
2012	27.929650779778598
2013	27.740627440090414
2014	27.544700908831253
2015	27.35078816448701
2016	27.24221089958657
2017	27.174921943849384
2018	27.02287548899833
2019	26.759110473457675
2020	26.454728632378504
2021	26.128018014118805
2022	25.760155418719073
2023	25.352597265753612