Year Percent of Working-Age Population 1960-01-01 17.5094421867068 1961-01-01 17.8143414035003 1962-01-01 18.1024420872037 1963-01-01 18.3798931196591 1964-01-01 18.6535197088802 1965-01-01 18.9312538289138 1966-01-01 19.2649677974573 1967-01-01 19.5890803935816 1968-01-01 19.9062398871147 1969-01-01 20.2145331729166 1970-01-01 20.5124213883096 1971-01-01 20.8151347026573 1972-01-01 21.0904678004520 1973-01-01 21.3495753172288 1974-01-01 21.6059487315382 1975-01-01 21.8676879127843 1976-01-01 22.2026570531442 1977-01-01 22.5219813097687 1978-01-01 22.8228031360554 1979-01-01 23.0979435022250 1980-01-01 23.3447552575054 1981-01-01 23.6169182796121 1982-01-01 23.8379911031335 1983-01-01 24.0280484916934 1984-01-01 24.2141063119567 1985-01-01 24.4113801032859 1986-01-01 24.6474325893794 1987-01-01 24.8726354584513 1988-01-01 25.0688827790479 1989-01-01 25.2071659522172 1990-01-01 25.2723377421514 1991-01-01 25.3096554756346 1992-01-01 25.2706260073813 1993-01-01 25.1666625976387 1994-01-01 25.0094931294034 1995-01-01 24.8087924713558 1996-01-01 24.6300704337969 1997-01-01 24.4040626645853 1998-01-01 24.1423997533961 1999-01-01 23.8565185661564 2000-01-01 23.5583851066222 2001-01-01 23.3433758592881 2002-01-01 23.1120914825676 2003-01-01 22.8902457697463 2004-01-01 22.7096194336027 2005-01-01 22.5932924992933 2006-01-01 22.4500425790615 2007-01-01 22.3341655582495 2008-01-01 22.2690776172747 2009-01-01 22.2975288369062 2010-01-01 22.4541187329330 2011-01-01 22.8214348111241 2012-01-01 23.3020908609289 2013-01-01 23.8418849785182 2014-01-01 24.3573715784718 2015-01-01 24.8012697165853 2016-01-01 25.3007499632228 2017-01-01 25.7190302148270