Year	% of working-age population
1960	33.53466723789811
1961	34.42589259997965
1962	35.012978425763855
1963	35.470209395531626
1964	36.09999707762795
1965	36.799364889381074
1966	37.48662292668909
1967	38.146859221856005
1968	38.772152368332165
1969	39.307635467873176
1970	39.57708862108489
1971	39.56009785626093
1972	39.288098471393745
1973	38.778666697459165
1974	38.198911714587425
1975	37.53305904361173
1976	36.567684904978655
1977	35.399772746636124
1978	34.17849807204716
1979	32.95388168313688
1980	31.813632919604284
1981	30.766042633590356
1982	29.73976754516675
1983	28.68929372158332
1984	27.76180108243614
1985	27.09492406630542
1986	26.61390039023229
1987	26.26696016736327
1988	26.08679718992928
1989	25.996052460860625
1990	25.947173878077486
1991	26.041458045085193
1992	26.250990453982283
1993	26.434419565525918
1994	26.548683025664115
1995	26.564765493171098
1996	26.44093960561569
1997	26.19116003751756
1998	25.89784360876342
1999	25.586659086067232
2000	25.23863152926357
2001	24.83349075980636
2002	24.4560904503763
2003	24.12800592322761
2004	23.85184830908945
2005	23.62825656566055
2006	23.34047339158972
2007	22.977106558663984
2008	22.60014736273062
2009	22.262677510010196
2010	21.950215160003733
2011	21.65960770384528
2012	21.447681365665993
2013	21.317795706257368
2014	21.246486297472565
2015	21.274796849801938
2016	21.399513323929376
2017	21.52414509199888
2018	21.599897883468987
2019	21.64464433899982
2020	21.676129363276413
2021	21.739110626420878
2022	21.846270545060285
2023	21.959923296477328