Year	% of working-age population
1960	8.749235751448621
1961	9.028332231634579
1962	9.33855021124
1963	9.659345819497869
1964	9.959730771827987
1965	10.231755233494363
1966	10.475781556060488
1967	10.683373235396623
1968	10.87039729192564
1969	11.076154048852938
1970	11.325742779143203
1971	11.631823182759867
1972	12.019652209686862
1973	12.480491358167974
1974	12.977805960054603
1975	13.47701300958776
1976	13.966958417153585
1977	14.443375424612947
1978	14.869361025977614
1979	15.210295199912375
1980	15.409271557128228
1981	15.477222399412833
1982	15.474533473454574
1983	15.480433190048759
1984	15.573873414729627
1985	15.695039283892697
1986	15.7714565711768
1987	15.87203203966816
1988	16.01980143803038
1989	16.146772582976883
1990	16.23758130895045
1991	16.26870844160485
1992	16.26479506201333
1993	16.27054058394771
1994	16.307500170068078
1995	16.318510821609134
1996	16.297853539198375
1997	16.277194751788308
1998	16.209595781662628
1999	16.137774190871674
2000	16.10870993573291
2001	16.1260764109163
2002	16.183682185844166
2003	16.221507437774974
2004	16.22552260364892
2005	16.200711517657346
2006	16.132677287616406
2007	16.03788584784336
2008	15.95692887752066
2009	15.975124134049992
2010	16.089345303678087
2011	16.348487677855953
2012	16.77149864867744
2013	17.17859632037539
2014	17.53194875473823
2015	17.896783814559544
2016	18.29962339753946
2017	18.728357246861265
2018	19.118379757702503
2019	19.430955398297574
2020	19.690264205364034
2021	19.91680725112987
2022	20.113065243226377
2023	20.323517965214528