Year	% of working-age population
1960	17.839473113302027
1961	18.046305775944816
1962	18.25347403157042
1963	18.47416337303353
1964	18.72994571379872
1965	19.03134684901649
1966	19.395674410959966
1967	19.786636980483774
1968	20.147760164873684
1969	20.50379111791953
1970	20.92754469931314
1971	21.396160373496482
1972	21.878959287586742
1973	22.378215676927887
1974	22.90897498276347
1975	23.43047610724714
1976	23.89326692096479
1977	24.357269902577745
1978	24.802527735761064
1979	25.15893228573104
1980	25.41545423879052
1981	25.599720041851647
1982	25.785654402028335
1983	25.978550585735434
1984	26.168958713503226
1985	26.541127918997194
1986	27.00284779211895
1987	27.294865324557904
1988	27.463048413284863
1989	27.59320919579233
1990	27.695340422968062
1991	27.7443659646928
1992	27.743635480187294
1993	27.711884691725203
1994	27.67361083782966
1995	27.61942889733759
1996	27.531079285922328
1997	27.419708745917287
1998	27.263230200701898
1999	27.052341588092403
2000	26.846286779912926
2001	26.67833060810794
2002	26.529778690348905
2003	26.421312193606965
2004	26.397281224609632
2005	26.375788607789037
2006	26.357316734494585
2007	26.49823102307815
2008	26.85665889792213
2009	27.40428369671714
2010	28.059456351063243
2011	28.75049776500649
2012	29.421965431342944
2013	30.04840790368571
2014	30.61823639486741
2015	31.069526721782253
2016	31.388369250573206
2017	31.633175155434255
2018	31.857093072677202
2019	32.06005204518913
2020	32.19518881268247
2021	32.33151559421912
2022	32.58022195045201
2023	32.86454694043088