Year Percent of Working-Age Population 1960-01-01 11.3432059616670 1961-01-01 11.6430971507294 1962-01-01 11.9503011154263 1963-01-01 12.2592358065616 1964-01-01 12.5672787922244 1965-01-01 12.8764005959831 1966-01-01 13.1999127312297 1967-01-01 13.4990075388461 1968-01-01 13.7879611684824 1969-01-01 14.0819550511546 1970-01-01 14.3877187393709 1971-01-01 14.7496578872206 1972-01-01 15.0888707138851 1973-01-01 15.4151859453025 1974-01-01 15.7435829611075 1975-01-01 16.0788407745930 1976-01-01 16.4701515625787 1977-01-01 16.8810475407738 1978-01-01 17.2352768879290 1979-01-01 17.4121311137979 1980-01-01 17.3513912447127 1981-01-01 17.1245416561777 1982-01-01 16.6734232919939 1983-01-01 16.1383911613834 1984-01-01 15.7119129690098 1985-01-01 15.4956275949027 1986-01-01 15.6105816355101 1987-01-01 15.8802787634203 1988-01-01 16.2373818107584 1989-01-01 16.5771666073514 1990-01-01 16.8491430412337 1991-01-01 17.2537032166167 1992-01-01 17.5972777314164 1993-01-01 17.8903321871747 1994-01-01 18.1513821781126 1995-01-01 18.3908257565007 1996-01-01 18.7395106049392 1997-01-01 19.0511221595170 1998-01-01 19.3180751884620 1999-01-01 19.5458697658787 2000-01-01 19.7338620363631 2001-01-01 20.0440782405695 2002-01-01 20.3181535227106 2003-01-01 20.5550165585993 2004-01-01 20.7304422661830 2005-01-01 20.8404806873360 2006-01-01 21.0144199469932 2007-01-01 21.1216635453354 2008-01-01 21.2141980997497 2009-01-01 21.3702708971208 2010-01-01 21.6395704948030 2011-01-01 22.1011840744726 2012-01-01 22.6631362908979 2013-01-01 23.3145137249838 2014-01-01 24.0352838159256 2015-01-01 24.8095859341398 2016-01-01 25.6922993904772 2017-01-01 26.6162129149828