Year Percent of Working-Age Population 1960-01-01 12.7344975512693 1961-01-01 12.9510210609170 1962-01-01 13.1385228072051 1963-01-01 13.3214490659072 1964-01-01 13.5326973730061 1965-01-01 13.7908280330224 1966-01-01 14.1523165044726 1967-01-01 14.5373757427738 1968-01-01 14.9360749426638 1969-01-01 15.3316865019848 1970-01-01 15.7141382610357 1971-01-01 15.9749161916073 1972-01-01 16.2173797916037 1973-01-01 16.4532737397059 1974-01-01 16.6951244326878 1975-01-01 16.9496061767554 1976-01-01 17.2549386906614 1977-01-01 17.5659610196820 1978-01-01 17.8651417599313 1979-01-01 18.1222510790405 1980-01-01 18.3228926061893 1981-01-01 18.4924452955890 1982-01-01 18.5922041489675 1983-01-01 18.6669417014238 1984-01-01 18.7758476008383 1985-01-01 18.9520685989724 1986-01-01 19.2580176597513 1987-01-01 19.6053079676787 1988-01-01 19.9807758345802 1989-01-01 20.3643544826365 1990-01-01 20.7476578052790 1991-01-01 21.0730424246545 1992-01-01 21.3880476196595 1993-01-01 21.6994540292575 1994-01-01 22.0186328908171 1995-01-01 22.3563853105195 1996-01-01 22.6767962630202 1997-01-01 23.0118492948971 1998-01-01 23.3650124724136 1999-01-01 23.7320304572274 2000-01-01 24.1077848577446 2001-01-01 24.4400656702007 2002-01-01 24.7608660148123 2003-01-01 25.0692308825846 2004-01-01 25.3601071428015 2005-01-01 25.6341944081196 2006-01-01 26.1031295301296 2007-01-01 26.5583709397619 2008-01-01 27.0300383962245 2009-01-01 27.5592997638736 2010-01-01 28.1736622630649 2011-01-01 28.8179264905975 2012-01-01 29.5162757069501 2013-01-01 30.2610757075004 2014-01-01 31.0317002034984 2015-01-01 31.8152775679591 2016-01-01 32.4827771116192 2017-01-01 33.1500873619739