Year	% of working-age population
1960	67.80018892037562
1961	62.116977488693536
1962	62.25349321177287
1963	62.177737336973
1964	62.17967599410898
1965	62.50393700787401
1966	62.65794724007981
1967	62.30686806539698
1968	61.513575618310455
1969	60.27321497704773
1970	60.567450413765926
1971	62.584742738885325
1972	64.34001073153281
1973	65.35500602397337
1974	65.67658661764143
1975	65.92059344795454
1976	66.22502250225023
1977	66.01162725905013
1978	64.79295249031148
1979	62.64134916561963
1980	60.23763377433218
1981	57.96894698427444
1982	55.970295734101015
1983	54.374878789837744
1984	52.92490687301156
1985	51.36704534666624
1986	49.8714330511132
1987	48.67726515422824
1988	47.90587286321472
1989	47.55876473960674
1990	47.45683480358893
1991	47.61733177191244
1992	48.01269480082037
1993	48.4249029561063
1994	48.62068452159414
1995	47.70532470984318
1996	46.08770546845348
1997	44.62680960499321
1998	43.129033642907224
1999	41.59678769562565
2000	40.40295727749873
2001	39.44697087023245
2002	38.3642412926593
2003	37.22345829310272
2004	36.091915511440575
2005	34.9761171997939
2006	33.92390276464371
2007	33.051012461059194
2008	32.364613649339255
2009	31.88815099615519
2010	31.50744652425218
2011	31.14090349250393
2012	30.86273558659457
2013	30.714306279330895
2014	30.707070707070706
2015	30.799371890638525
2016	30.944195833209854
2017	31.112640445235705
2018	31.267465220609335
2019	31.364475149075048
2020	31.533557150337266
2021	31.675425230884045
2022	31.752862280715533
2023	31.820491647081244