Year	% of working-age population
1960	12.708740574253765
1961	12.872684400780685
1962	13.10269541750311
1963	13.285655330990378
1964	13.40726275289561
1965	13.76439035322388
1966	14.199639812147794
1967	14.506675539930965
1968	14.888222860277061
1969	15.26239171428561
1970	15.68753947993018
1971	16.03248760933204
1972	16.2522585336962
1973	16.47078051887482
1974	16.62682630288293
1975	16.92717872092951
1976	17.26215824227425
1977	17.498242167453913
1978	17.764356495549517
1979	18.027878673772516
1980	18.26738057664622
1981	18.43215743100774
1982	18.56795358676675
1983	18.633829274888615
1984	18.670955497490667
1985	18.877097152502145
1986	19.22634593381015
1987	19.574231382253956
1988	19.935170203108957
1989	20.339546716519028
1990	20.72462721566952
1991	21.10167275717807
1992	21.494196373374187
1993	21.85696116427588
1994	22.19228927024187
1995	22.539165017382658
1996	22.888139533887266
1997	23.23426943614736
1998	23.57565843217866
1999	23.840798887702686
2000	24.15632339109411
2001	24.56805282661973
2002	24.94995039356346
2003	25.318103550286992
2004	25.743940744268368
2005	26.13816531954071
2006	26.453888333465787
2007	26.75317299584552
2008	27.10463210268159
2009	27.563079890311464
2010	28.072947710202612
2011	28.63821872076408
2012	29.242562453452187
2013	29.963816358222278
2014	30.773005290843514
2015	31.51701714772316
2016	32.25678867810764
2017	33.0059586167922
2018	33.65971164875203
2019	34.22094998277008
2020	34.72598544054233
2021	35.198242210143995
2022	35.82119789129005
2023	36.59602542493883