Year	% of working-age population
1960	39.222720945978345
1961	38.23540479897642
1962	37.385124262174145
1963	36.87160131224976
1964	36.68893687020445
1965	36.66594372955798
1966	36.7930273138995
1967	36.91285303850396
1968	36.791693884304486
1969	36.529833888773005
1970	36.25645933738358
1971	36.039799404982915
1972	35.915671585678574
1973	35.79449203212619
1974	35.6487072302214
1975	35.47153395973885
1976	35.15107680682247
1977	34.650231217565654
1978	33.978291027078015
1979	33.16071440497318
1980	32.20547573001742
1981	31.067256848160056
1982	29.95181923610896
1983	29.0698573764123
1984	28.363325725857436
1985	27.77319443802646
1986	27.19060627255358
1987	26.553261044059482
1988	26.011253941220243
1989	25.62372038120136
1990	25.30600585135006
1991	25.1251725464038
1992	25.163737966513473
1993	25.30570925862326
1994	25.512096431890164
1995	25.817736297259525
1996	26.188599479945353
1997	26.58835528910492
1998	26.988500091206564
1999	27.369188237120152
2000	27.702954692763846
2001	27.957234008376812
2002	28.130801524816324
2003	28.233021385853853
2004	28.253898539474264
2005	28.2022956386876
2006	28.11946858999817
2007	28.00197093153119
2008	27.864763159028662
2009	27.704210933111202
2010	27.519201175973006
2011	27.335493792952093
2012	27.117305142146996
2013	26.85523823702123
2014	26.575914019408977
2015	26.305526859150934
2016	26.094076880534285
2017	25.954005032941534
2018	25.827503650076455
2019	25.685655472696823
2020	25.54610163594876
2021	25.43045767034176
2022	25.30949711840836
2023	25.179174594139077