Year % of total labor force 1991 47.100909464387584 1992 47.055071609255045 1993 47.00987204963503 1994 46.94204135236042 1995 47.463613633372816 1996 47.74708729381454 1997 47.27918036073023 1998 47.36584085157306 1999 47.6999115283162 2000 47.60087475306111 2001 47.75986333411211 2002 47.93588056135065 2003 47.79325817312848 2004 47.93690714072441 2005 48.170526958736104 2006 48.17421194907484 2007 48.229874432205975 2008 48.00049780443208 2009 48.39599141037761 2010 47.98196533086897 2011 47.80862870547141 2012 48.05227984728816 2013 48.116979588281346 2014 48.2064114587457 2015 48.27933100774791 2016 47.96742205164038 2017 47.872240554202996 2018 47.95982416252457 2019 47.85249677855487 2020 47.67939467938123 2021 47.65279251562311 2022 48.263001833634725 2023 48.45380800238349