Year % of total labor force 1991 48.42294996991267 1992 48.459088660672755 1993 48.4953583120828 1994 48.52371484855761 1995 48.55241236699121 1996 48.56677242113667 1997 48.57984719566742 1998 48.58734093588551 1999 48.592266143076515 2000 48.5954236254411 2001 48.58919545740832 2002 48.5465312521553 2003 48.56631323691049 2004 48.58669256032292 2005 48.613550953090304 2006 48.59557848418698 2007 48.58008374501248 2008 48.56645410841753 2009 48.54985510661038 2010 48.535160988686 2011 48.52223835071031 2012 48.510316282097136 2013 48.50018063982115 2014 48.48960921221205 2015 48.47432650967824 2016 48.53531390901545 2017 48.595007758385776 2018 48.65030590752371 2019 48.70947708904653 2020 48.673835722671534 2021 48.864519896044754 2022 48.675677239608305 2023 48.71763463918713