Year	% of working-age population
1960	40.354805174014075
1961	41.184028707986656
1962	41.4458698269152
1963	41.43785402798669
1964	40.92747631108574
1965	40.29649610187837
1966	39.74549967827211
1967	39.1888097100803
1968	38.706128557915505
1969	38.11399469924283
1970	37.42652551052734
1971	36.815097325791655
1972	36.23062789726361
1973	35.580793060150214
1974	34.88776016332053
1975	34.22785624403494
1976	33.62185556103897
1977	33.07141788621446
1978	32.49568628362949
1979	32.17030662832385
1980	32.113226667353736
1981	31.997991164510463
1982	31.871598474377745
1983	31.929785581016993
1984	32.145233542832976
1985	32.30355700945977
1986	32.39156001128996
1987	32.393344837404065
1988	32.34637979953735
1989	32.33171463782439
1990	32.25304544293993
1991	32.08233050947262
1992	31.916067334036534
1993	31.724270178123522
1994	31.36710467213591
1995	30.833078143605952
1996	30.164211163864923
1997	29.3444959956539
1998	28.207925261887436
1999	26.866529504209296
2000	25.618891057117853
2001	24.377929338962083
2002	23.254495918689557
2003	22.432058022094612
2004	21.757248828376465
2005	21.153345592608435
2006	20.67417514385462
2007	20.33987133491769
2008	20.16482730918226
2009	20.15465885939161
2010	20.195844024838497
2011	20.31386358150628
2012	20.601544623675036
2013	21.009711589411157
2014	21.49608868452438
2015	21.953491603453536
2016	22.336701002860472
2017	22.635666115287663
2018	22.7560760756263
2019	22.75659901015263
2020	22.712823612510775
2021	22.593977003238663
2022	23.455951795693178
2023	23.861786307685243