Year	% of working-age population
1960	14.0529068657647
1961	14.260957058272826
1962	14.413835401570669
1963	14.543023280768876
1964	14.704452754836243
1965	14.905417884341029
1966	15.108932581362149
1967	15.327908790754766
1968	15.535902713220668
1969	15.704394487513182
1970	15.886284919823822
1971	16.066362054057148
1972	16.271633602682655
1973	16.488014177788685
1974	16.706460483579654
1975	16.92658722220846
1976	17.146318256891746
1977	17.382110833893655
1978	17.605964449573804
1979	17.782573563381096
1980	17.854532927370034
1981	17.806945870930562
1982	17.699504903957116
1983	17.564298699497304
1984	17.52662118553749
1985	17.66868675421176
1986	17.892762815706995
1987	18.122129688199223
1988	18.397108251627415
1989	18.670915616282876
1990	18.91612443601727
1991	19.197086956090516
1992	19.49925386345274
1993	19.787979495179027
1994	20.085458597665276
1995	20.383770501512295
1996	20.641135660416722
1997	20.860130571716002
1998	21.053570131998573
1999	21.23886663763702
2000	21.455980850241367
2001	21.739688346366034
2002	22.037534597399898
2003	22.314874788050982
2004	22.6004480557325
2005	22.91977319973126
2006	23.24173586000542
2007	23.536611853045894
2008	23.84522047717436
2009	24.186939008025064
2010	24.48712636565875
2011	24.86352425213616
2012	25.45667007493038
2013	26.14566841924971
2014	26.823649345349224
2015	27.421102090805544
2016	28.04350035989425
2017	28.683355296523676
2018	29.27045968589038
2019	29.894734811507824
2020	30.520685922216916
2021	31.144920508577965
2022	31.881671677952433
2023	32.633924044019956