Year	% of working-age population
1960	11.75283760265901
1961	11.85395089901447
1962	11.970010160109307
1963	12.089153269831709
1964	12.18379317399047
1965	12.234418678421084
1966	12.240561861855955
1967	12.190939348023157
1968	12.10138734721008
1969	12.003359136819473
1970	11.924491614680385
1971	11.907626612880062
1972	11.972141519081559
1973	12.088345313187618
1974	12.234946832508209
1975	12.400567016951932
1976	12.585261314406857
1977	12.793052230391948
1978	12.992588562887853
1979	13.150317822418108
1980	13.248238955932944
1981	13.24870368877784
1982	13.130582786874431
1983	12.939029164473737
1984	12.773663896927914
1985	12.682790006595223
1986	12.638925500533485
1987	12.622984875144228
1988	12.63582233625672
1989	12.658161403368446
1990	12.703913236696643
1991	12.847376210242023
1992	13.107677030968784
1993	13.499608130125523
1994	13.940547483857287
1995	14.389773619938584
1996	14.824220241335398
1997	15.193976141181109
1998	15.544110464858147
1999	15.888920415993288
2000	16.28036627000572
2001	16.753024572117237
2002	17.25411228222805
2003	17.775213163289656
2004	18.318663963966156
2005	18.796500555756886
2006	19.09764031850845
2007	19.23024819778412
2008	19.30203256635292
2009	19.311267744124862
2010	19.210526315789473
2011	19.201368674927824
2012	19.42128761962602
2013	19.755350086104244
2014	20.249173066686943
2015	20.895988704742052
2016	21.493942570494504
2017	22.09269646052774
2018	22.791554409648793
2019	23.554256957296843
2020	24.25432344477018
2021	24.800591205813525
2022	25.323704623714292
2023	25.952852392871822