Year % of total labor force 1991 1.5752777195408847 1992 1.2500466399977423 1993 1.2692757251390883 1994 1.297632162465009 1995 1.7024793928049207 1996 1.6790806417882786 1997 1.5937633895080734 1998 1.5493235905153433 1999 1.4794574239671088 2000 1.3255066677973857 2001 1.184385746769832 2002 1.3248724335607065 2003 1.1352590164399696 2004 1.077411897947741 2005 1.0378485927032544 2006 1.0146185045848644 2007 0.9863016912052901 2008 0.963271161739146 2009 0.9519771195413911 2010 0.9505831422331148 2011 0.915579029241735 2012 0.9147308364207974 2013 0.9169797126971196 2014 0.8661269569759662 2015 0.8679856170073262 2016 0.8614997398309956 2017 0.8559740283504712 2018 0.8562956636507265 2019 0.8600181701527366 2020 0.8713495325822768