Year	% of working-age population
1960	12.723418561783234
1961	13.035047283042136
1962	13.279883382657598
1963	13.398500049702921
1964	13.499988473767532
1965	13.802751629681195
1966	14.190649754285722
1967	14.498822215344545
1968	14.8225219482685
1969	15.123233605843417
1970	15.463210653573285
1971	15.77042070199314
1972	16.0247155657565
1973	16.27739583678319
1974	16.411133166716315
1975	16.576177933586997
1976	16.837391895420563
1977	17.086722870027035
1978	17.328249512560788
1979	17.54191215905481
1980	17.753126314151093
1981	17.909002543123474
1982	18.036532988896962
1983	18.174813572949397
1984	18.327978344994104
1985	18.556044306829005
1986	18.880016158709907
1987	19.285473051206992
1988	19.718226071287994
1989	20.14522904495117
1990	20.557820078848334
1991	20.9195021113753
1992	21.23882056290912
1993	21.565870278341674
1994	21.91971780887151
1995	22.320187654827357
1996	22.736261479501934
1997	23.162203711520352
1998	23.611359600489006
1999	24.00401794152269
2000	24.37007234117497
2001	24.789774016786623
2002	24.948530215770234
2003	24.734353236698478
2004	24.35320568163305
2005	24.197251299835685
2006	24.17280683941151
2007	23.98848610190375
2008	24.025177363736574
2009	24.38103433104374
2010	24.89440669096225
2011	25.41762600785128
2012	25.968434306083278
2013	26.72290353597817
2014	27.502755494955206
2015	28.052247175383954
2016	28.486053954579443
2017	28.923584623923933
2018	29.299254268821045
2019	29.581498845235167
2020	29.83763902437525
2021	30.160355873387413
2022	30.733899815913368
2023	31.51368362867273