Year	% of working-age population
1960	34.05577379735936
1961	33.181140564943256
1962	32.426646048815286
1963	31.85363162219924
1964	31.541308764857018
1965	31.477374123645635
1966	31.580299910084985
1967	31.750239306329437
1968	31.824001567298772
1969	31.826731735368668
1970	31.83667670431386
1971	31.874233372087808
1972	31.943565391854182
1973	32.01663134596175
1974	32.11918007132474
1975	32.208908891603485
1976	32.183759024846744
1977	32.025115061740564
1978	31.70765518730882
1979	31.19861365385801
1980	30.588717620643497
1981	29.942006265783398
1982	29.283532209879375
1983	28.726055614683226
1984	28.338109434811308
1985	28.103840314505547
1986	27.91417458635199
1987	27.724936249895244
1988	27.6496656242456
1989	27.6816612159648
1990	27.862624347444566
1991	28.226448110694097
1992	28.653993169295134
1993	29.07963105466723
1994	29.392100015526363
1995	29.507997409613267
1996	29.481437674487992
1997	29.367428772772612
1998	29.190528394911585
1999	28.955031617568324
2000	28.653050708431778
2001	28.298205044494978
2002	27.93315678035769
2003	27.545059100565922
2004	27.114732048367163
2005	26.615571122743674
2006	26.108666604653852
2007	25.71701261120894
2008	25.472147018616237
2009	25.40318856594071
2010	25.541292872467398
2011	25.84235581829622
2012	26.238275249604204
2013	26.681061264763418
2014	27.11526176289586
2015	27.515550315699528
2016	27.883141970003027
2017	28.18187365174845
2018	28.376668502295427
2019	28.48451850078243
2020	28.51883966724163
2021	28.48753699206405
2022	28.31768455455792
2023	28.027181986093535