Year % of total labor force 1991 1.3570816306692874 1992 1.3464839936715252 1993 1.3068797118211428 1994 0.9810238253177435 1995 1.5837572102999722 1996 1.5407240639555924 1997 1.3383609768922038 1998 1.060114950425474 1999 1.0222917080644818 2000 1.2844616321112494 2001 1.1901784771808073 2002 1.1562290232755326 2003 1.123951062635518 2004 1.0394213541321546 2005 1.0167934021970786 2006 0.7253559788088287 2007 0.7097914308300138 2008 0.6947530857458304 2009 0.6649140083808084 2010 0.6512138212957503 2011 0.7709453831671457 2012 0.7072866577645528 2013 0.7444285331889294 2014 0.7316963730295187 2015 0.7148208514487701 2016 0.6960964270607365 2017 0.6755893692399133 2018 0.6651320476379778 2019 0.663463935951969 2020 0.6655590525782364