Year	% of working-age population
1960	55.42533292491012
1961	56.02991699991403
1962	56.455311392728106
1963	56.81311699224625
1964	57.255691520971865
1965	57.76764595854552
1966	58.24905697230934
1967	58.639687680996964
1968	58.782518722087715
1969	58.78337036785245
1970	58.75740222875814
1971	58.667022498255974
1972	58.47114606033092
1973	58.09765821458763
1974	57.507830730503926
1975	56.798781536502304
1976	56.001245693103485
1977	55.26774418241005
1978	54.60694742879141
1979	53.888839928046316
1980	53.04448441775601
1981	51.96800388683658
1982	50.75963326888721
1983	49.54757980116909
1984	48.654019208602215
1985	48.31952666817018
1986	48.27273893170446
1987	48.31733687884008
1988	48.535379756889945
1989	48.890887878506845
1990	49.36856081438511
1991	49.90671741031768
1992	50.37753974238465
1993	50.74803169027612
1994	51.03606956352954
1995	51.33245809578805
1996	51.64268022825003
1997	51.93448037300278
1998	52.16703253043152
1999	52.329710449857714
2000	52.46169588121038
2001	52.53102053405141
2002	52.522271399319344
2003	52.477761250748344
2004	52.435855203492835
2005	52.27602043848785
2006	51.89607317998316
2007	51.51394164395414
2008	51.40705731203281
2009	51.564222541016
2010	51.81761686331994
2011	52.25903666392126
2012	52.82325063278878
2013	53.33853282965274
2014	53.85912099656389
2015	54.30757561199806
2016	54.68678352859237
2017	55.104997475402726
2018	55.549590300895225
2019	55.97237862703612
2020	56.252720196062654
2021	56.507219121818274
2022	56.89401536286316
2023	57.31376576884417