Year	% of working-age population
1960	18.631026081806443
1961	18.904359449801206
1962	19.20051257112586
1963	19.41691753450565
1964	19.665226151685356
1965	19.972479713207537
1966	20.297862381985553
1967	20.638165692132386
1968	20.88304732826242
1969	21.07263863170854
1970	21.272841350934698
1971	21.4448020074413
1972	21.609310832470356
1973	21.757862144032696
1974	21.86001164979316
1975	21.924263598323012
1976	21.932000092155867
1977	21.99019779726846
1978	22.09835447363976
1979	22.173339508649818
1980	22.094601181358307
1981	21.732974820340168
1982	21.193818677956976
1983	20.60195838593019
1984	20.258055446534993
1985	20.383909594414888
1986	20.724020569716124
1987	21.08166005690923
1988	21.491107601198223
1989	21.903733967110263
1990	22.319448045185005
1991	22.73477491932266
1992	23.10355497690929
1993	23.431783823991278
1994	23.761059205148207
1995	24.148136293415774
1996	24.552733659682076
1997	24.922713904453552
1998	25.22024531340672
1999	25.44326263583951
2000	25.616286575190887
2001	25.751373088648737
2002	25.869127778315736
2003	25.985868655082854
2004	26.113581869309144
2005	26.144898421540834
2006	25.995817513162795
2007	25.824816077757106
2008	25.815055583923836
2009	25.948443849470877
2010	26.117454115784838
2011	26.44563656148888
2012	26.894527498449328
2013	27.300667195410373
2014	27.718823989162793
2015	28.102747842482543
2016	28.44527061127199
2017	28.81542460071752
2018	29.21774321439048
2019	29.65311731481048
2020	30.01242589623943
2021	30.389121783152675
2022	30.953767349277094
2023	31.608464020170068