Year	% of working-age population
1960	39.07726514730406
1961	38.27645639434677
1962	38.23529411764706
1963	38.52491694352159
1964	38.527408368472265
1965	38.54054396753946
1966	38.67866004962779
1967	38.83931281490924
1968	38.924182152823136
1969	38.987680148768014
1970	39.188263500399586
1971	39.50847457627118
1972	39.72356444544331
1973	39.72977499860421
1974	39.575246756127314
1975	39.18234840981622
1976	38.74154114822092
1977	38.48405985686402
1978	38.21072487200215
1979	37.77968097634086
1980	37.19768245362249
1981	36.58742736397253
1982	36.405359780544416
1983	36.52206154987023
1984	36.45078824030678
1985	36.089541048572805
1986	35.41161901685242
1987	34.529997834091404
1988	33.613079019073574
1989	32.4580638087929
1990	31.076685594575228
1991	29.85645402649227
1992	29.453194321206745
1993	29.7758095765292
1994	30.0641663900874
1995	30.13312710600453
1996	30.051270742598817
1997	29.919137466307276
1998	29.734036707330475
1999	29.424037775215506
2000	28.995834246875685
2001	28.222234374145565
2002	27.66626885103613
2003	27.711424133683256
2004	27.808335096255554
2005	27.909404028807018
2006	27.741571303946223
2007	27.361006289308175
2008	27.151892479494023
2009	27.113361901051814
2010	27.307395250048273
2011	27.544221274147933
2012	27.59650953239116
2013	27.50507866017858
2014	27.506292444317804
2015	27.643014038773757
2016	27.751632731463694
2017	27.84804016219347
2018	27.87361891839504
2019	27.745102804646866
2020	27.46990300726227
2021	27.37786053805067
2022	27.42555708933149
2023	27.37983268155042