Year	% of working-age population
1960	64.16019217867422
1961	62.079633896775654
1962	59.66477771569958
1963	57.1123197371677
1964	54.46837524983344
1965	51.913985605712256
1966	49.57349537931852
1967	47.498093687529625
1968	45.6024882524978
1969	43.85168799487296
1970	42.304600958318304
1971	40.96762645118396
1972	39.6677119492572
1973	38.46033358091687
1974	37.46172526660331
1975	36.58536585365854
1976	35.979723910529295
1977	35.59962644057521
1978	35.34647631558612
1979	35.247537992759646
1980	35.29392306965315
1981	35.38538773365363
1982	35.568012129844476
1983	35.87561775877796
1984	36.10196620527838
1985	36.18422230577787
1986	36.09064631545552
1987	35.91154898741106
1988	35.732232123451425
1989	35.49198581957433
1990	35.09897063714747
1991	34.61335986238056
1992	34.14980751904333
1993	33.644534553857234
1994	33.007371144947186
1995	32.30598581785049
1996	31.721450262623407
1997	31.127358472211952
1998	30.42127338051842
1999	29.704063773034033
2000	28.976439978943304
2001	28.165234241764338
2002	27.231320577106246
2003	26.25511356138473
2004	25.268246369931763
2005	24.32308496994275
2006	23.479774123663745
2007	22.717224602041355
2008	22.1486206424962
2009	21.794302303212607
2010	21.49063410912934
2011	21.17666014017366
2012	20.874243396279045
2013	20.58767733279066
2014	20.346927777608315
2015	20.15533684493166
2016	20.026519609273432
2017	19.933947801729847
2018	19.77903579254931
2019	19.58603798840883
2020	19.421561936959446
2021	19.315764695205303
2022	19.415931762324707
2023	19.64095075980649