Year % of total labor force 1991 1.728779308631595 1992 1.6567772807959702 1993 1.5603927139335814 1994 1.5504341733888027 1995 1.7498878522232286 1996 1.6990618955361483 1997 1.596608439666904 1998 1.5425296696375301 1999 1.466544674894976 2000 1.3307654954896533 2001 1.314288998820366 2002 1.3050646478584191 2003 1.2265799049495762 2004 1.1867980656968085 2005 1.1836405365522014 2006 1.1244092493972497 2007 1.1021218697995867 2008 1.0886455860297954 2009 0.9939692863858804 2010 1.015260432549317 2011 0.9725216120890505 2012 0.9482057034051934 2013 0.9346776390278604 2014 0.9169346102849701 2015 0.9061559804495137 2016 0.8998790326054269 2017 0.875111335935036 2018 0.8746237731233584 2019 0.8679758277453261 2020 0.8768893804287493