Year	% of working-age population
1960	15.895204119115661
1961	16.07531141797936
1962	16.152855512356492
1963	16.24718116815761
1964	16.43926012015406
1965	16.679237968913466
1966	16.88634234799581
1967	17.12032049794258
1968	17.41330536579835
1969	17.62948788781235
1970	17.793621988880652
1971	18.00424110308255
1972	18.24705368644451
1973	18.42085670724799
1974	18.57252674761605
1975	18.717723129107483
1976	18.81593842450563
1977	18.93609840050074
1978	19.021115875548464
1979	19.05561942730476
1980	18.975984736810723
1981	18.668118708498525
1982	18.22244676282618
1983	17.878457158147604
1984	17.591071164086642
1985	17.236996018164415
1986	17.059933263258777
1987	17.069725261309863
1988	17.16404882353792
1989	17.360911827526238
1990	17.59581109035421
1991	17.91662424674336
1992	18.52334885045424
1993	19.277028860115365
1994	19.92283110525638
1995	20.537744423271644
1996	21.149220748137598
1997	21.71183122955564
1998	22.067084774803643
1999	22.11012551148459
2000	22.236091620180577
2001	22.605696496063203
2002	23.08521606190602
2003	23.590282137052736
2004	24.073640445485633
2005	24.542158695190228
2006	25.109616783656776
2007	25.61267214296325
2008	25.763267038202308
2009	25.811244298127356
2010	25.909414942217136
2011	26.230702714129734
2012	26.844461814451215
2013	27.548389393784518
2014	28.31716581158097
2015	29.01798018395938
2016	29.670483367848977
2017	30.300230837749652
2018	30.771250549980838
2019	31.261704701768345
2020	31.855104880492753
2021	32.25395458281932
2022	32.65789455107616
2023	33.27255972608772