Year	% of working-age population
1960	51.86257702821665
1961	55.48450796934505
1962	61.83570200711813
1963	67.72044934884184
1964	73.12992626493771
1965	78.0521297543787
1966	82.4266463526754
1967	86.21319635670409
1968	89.52287390807955
1969	92.5113404249675
1970	93.74967268918564
1971	93.22762148337596
1972	92.65073492650735
1973	92.17661296237439
1974	91.7238247735583
1975	91.27665531239792
1976	90.8084642134691
1977	90.32914078560535
1978	89.87412467242343
1979	89.39837058700647
1980	88.94706817163114
1981	88.51092678258095
1982	88.45769584892355
1983	88.64906533050684
1984	88.48807970808991
1985	88.89363281975126
1986	89.79919385726531
1987	90.3512529449561
1988	90.75955322448553
1989	91.15895166780122
1990	91.5709959735117
1991	91.81353226699677
1992	91.74430476676663
1993	91.34099138469222
1994	90.6311501670557
1995	89.65512102062716
1996	88.45146266918935
1997	87.00796908959188
1998	85.25455427027777
1999	83.25860904794058
2000	81.16745453827212
2001	79.981758388572
2002	79.5551999599955
2003	79.05262646623115
2004	78.642106506081
2005	78.32027210259002
2006	78.10765443151298
2007	78.04066583764208
2008	78.05467178837824
2009	78.00620918086577
2010	77.76224059662775
2011	77.3482466029787
2012	77.4011408869476
2013	77.85580390701568
2014	78.07789003430003
2015	77.99357798165137
2016	77.56251630958059
2017	76.82138479041177
2018	75.84583218136576
2019	74.65132997843278
2020	73.0501238081919
2021	71.23876514263384
2022	69.52789699570815
2023	67.94995332590562