Year	% of working-age population
1960	11.35304090440735
1961	11.650772250628293
1962	11.91929742016252
1963	12.185363301881008
1964	12.486332015340006
1965	12.835820338327471
1966	13.203565314127587
1967	13.551019643198362
1968	13.879450914177516
1969	14.175433817805384
1970	14.448936828915615
1971	14.728982855837693
1972	15.06289154257898
1973	15.426448764061144
1974	15.804242134454935
1975	16.195493317870632
1976	16.555213314900843
1977	16.913792042880196
1978	17.231717819408907
1979	17.47281407578706
1980	17.47992658175282
1981	17.198340980405348
1982	16.75840448710753
1983	16.23108825498219
1984	15.948873394881812
1985	15.96903962985463
1986	16.095611326630248
1987	16.311243320843133
1988	16.58780925066504
1989	16.844649353498657
1990	17.082210359639074
1991	17.317550639487486
1992	17.552790781004735
1993	17.825563323479646
1994	18.1140027095845
1995	18.435463792321507
1996	18.755389473291466
1997	19.040411903807374
1998	19.29456836462896
1999	19.517941550762746
2000	19.72175068204966
2001	19.917748024319305
2002	20.146706685675085
2003	20.352823194346996
2004	20.549288709165094
2005	20.749060555573646
2006	20.94510149221786
2007	21.130681450868526
2008	21.31870028179378
2009	21.54935205436708
2010	21.785510654466897
2011	22.162651326730455
2012	22.748010988654634
2013	23.42992569622881
2014	24.20144832883174
2015	25.017873141097137
2016	25.874273576167266
2017	26.756623957776814
2018	27.653205710259797
2019	28.583859950177622
2020	29.467823895277252
2021	30.150327248101117
2022	29.780395338447114
2023	29.707138503088192