Year	% of working-age population
1960	13.57622633170375
1961	13.754995325230599
1962	13.888026730059199
1963	13.999040245640806
1964	14.137210929449925
1965	14.305121494562416
1966	14.475343324126875
1967	14.662970011117961
1968	14.830463273848043
1969	14.957378709076828
1970	15.10179674267518
1971	15.24525091136432
1972	15.409000996544654
1973	15.58565284354204
1974	15.760721248101921
1975	15.934400052541054
1976	16.10057113560699
1977	16.27414520733441
1978	16.43693605573327
1979	16.56370127811119
1980	16.59778883425325
1981	16.533847200646942
1982	16.424498931098825
1983	16.277031111266645
1984	16.21390729341822
1985	16.323710201920605
1986	16.50362613963388
1987	16.682188984906066
1988	16.898654779350366
1989	17.10700745170194
1990	17.28259273099164
1991	17.484834345305156
1992	17.70180595350335
1993	17.905604047688506
1994	18.12109207653563
1995	18.344408160855455
1996	18.545598656144545
1997	18.723723057949215
1998	18.88838379423864
1999	19.049115338508656
2000	19.22546480563025
2001	19.444913088240703
2002	19.66412924310275
2003	19.8595122432509
2004	20.069187449739943
2005	20.316105905659175
2006	20.574129330040204
2007	20.824762940627497
2008	21.10153801476519
2009	21.406029800321953
2010	21.67175546120121
2011	21.996155251758108
2012	22.503262203043263
2013	23.086935835056618
2014	23.65451532826219
2015	24.157308153017233
2016	24.68206521432592
2017	25.211791498171223
2018	25.714745199498502
2019	26.247896595748177
2020	26.76944389515229
2021	27.273239995000093
2022	27.76446041521939
2023	28.34579732340814