Year Percent of Working-Age Population 1960-01-01 13.2197385046742 1961-01-01 13.4523848894718 1962-01-01 13.6656005880909 1963-01-01 13.8665929622862 1964-01-01 14.0686461223850 1965-01-01 14.2837984522828 1966-01-01 14.5690530064432 1967-01-01 14.8454069733022 1968-01-01 15.1160140967546 1969-01-01 15.3829318576972 1970-01-01 15.6422354433676 1971-01-01 15.9421101547004 1972-01-01 16.2104182537310 1973-01-01 16.4554625855054 1974-01-01 16.6907119596862 1975-01-01 16.9208158428685 1976-01-01 17.2303108695600 1977-01-01 17.5361623205094 1978-01-01 17.7870417365377 1979-01-01 17.9056070081723 1980-01-01 17.8577422928132 1981-01-01 17.7269509864503 1982-01-01 17.4408270908413 1983-01-01 17.0939628716901 1984-01-01 16.8113777146524 1985-01-01 16.6630152156371 1986-01-01 16.7284288977502 1987-01-01 16.8865942400776 1988-01-01 17.1162018898644 1989-01-01 17.3802338614227 1990-01-01 17.6599244182005 1991-01-01 18.0342735552422 1992-01-01 18.4157216091923 1993-01-01 18.7755514626760 1994-01-01 19.0758136242697 1995-01-01 19.2978227652627 1996-01-01 19.5304809173912 1997-01-01 19.6688761332515 1998-01-01 19.7596080929755 1999-01-01 19.8687608277563 2000-01-01 20.0283678201313 2001-01-01 20.3147534011897 2002-01-01 20.6386653008920 2003-01-01 20.9512596160220 2004-01-01 21.1758941353661 2005-01-01 21.2768193340712 2006-01-01 21.4038140280842 2007-01-01 21.4302683821065 2008-01-01 21.4206255230371 2009-01-01 21.4565130890987 2010-01-01 21.5876082139498 2011-01-01 21.8377810205952 2012-01-01 22.1721321514767 2013-01-01 22.5643751748158 2014-01-01 22.9901079120963 2015-01-01 23.4378811821929 2016-01-01 23.9516424385846 2017-01-01 24.4845200663825