Year	% of working-age population
1960	17.50375946510397
1961	17.79755542231402
1962	18.05451696021964
1963	18.310083949019706
1964	18.59114890643692
1965	18.927601468057524
1966	19.31302621590653
1967	19.685019210445244
1968	20.003385704737358
1969	20.275263603367197
1970	20.52588663580806
1971	20.767967577684942
1972	21.00441889050294
1973	21.258327577416246
1974	21.56248269352551
1975	21.888084311160036
1976	22.202794009863922
1977	22.542359360289147
1978	22.87189768564
1979	23.15080444292747
1980	23.39077785844751
1981	23.590504451038576
1982	23.81838864502547
1983	24.06895000793935
1984	24.220135957055398
1985	24.45719270019772
1986	24.761923565944087
1987	24.915536762533996
1988	25.01258553023609
1989	25.129858531726533
1990	25.187611010008105
1991	25.174233053639377
1992	25.118386436714413
1993	24.96764380114092
1994	24.803592551901183
1995	24.670359764462006
1996	24.525944716881884
1997	24.34485120194404
1998	24.080243036291694
1999	23.73004894382108
2000	23.380844275160477
2001	23.094596935803573
2002	22.825627202424418
2003	22.608202308901944
2004	22.48688126371005
2005	22.405023504434016
2006	22.277262066487943
2007	22.145759430990914
2008	22.126175560496105
2009	22.30529949380712
2010	22.629089967704726
2011	23.05701617527355
2012	23.519682095254936
2013	23.93495978656347
2014	24.347973150774685
2015	24.759123916402086
2016	25.18005533713313
2017	25.64942051218041
2018	26.17783561349895
2019	26.69555236728838
2020	27.25211067515318
2021	27.871313404208305
2022	28.424633731354586
2023	28.91744771621615