Year	% of working-age population
1960	14.8466219587013
1961	15.131552415702219
1962	15.394337703270079
1963	15.619261010121845
1964	15.88460234623385
1965	16.215279906282905
1966	16.575167334352663
1967	16.934779427693673
1968	17.264496512104632
1969	17.570232865664355
1970	17.888607201562973
1971	18.204016335254185
1972	18.516304074635784
1973	18.825599055507514
1974	19.125350842873424
1975	19.40865314214542
1976	19.65258483661922
1977	19.90764442160059
1978	20.15788280180876
1979	20.345115277299225
1980	20.322540333114574
1981	20.026955040811913
1982	19.6083108032077
1983	19.153049765866434
1984	18.870326846032427
1985	18.934637386476155
1986	19.18852371293527
1987	19.46405023354984
1988	19.750032213248495
1989	20.02449514414036
1990	20.299121393613145
1991	20.573925357692968
1992	20.84871174789798
1993	21.148092441452167
1994	21.46130427708498
1995	21.804155374100763
1996	22.13695843241065
1997	22.42954884363578
1998	22.700024947842117
1999	22.98355390973312
2000	23.3154695558015
2001	23.66869460380583
2002	24.005582317019673
2003	24.300225522646063
2004	24.62588964850305
2005	25.00320640316309
2006	25.34056338889284
2007	25.572714406294466
2008	25.80188532066036
2009	26.108878395942593
2010	26.39123553023225
2011	26.76300161752112
2012	27.337708790568136
2013	27.98455044390122
2014	28.676807124768036
2015	29.3292437069324
2016	29.94200099623945
2017	30.546093976027873
2018	31.141679405549837
2019	31.75170157341904
2020	32.340729560135664
2021	32.877131680220785
2022	33.250984779628595
2023	33.764858094301296