Year % of total labor force 1991 51.11303349746471 1992 51.09603442877353 1993 51.105653875989965 1994 51.10419175345984 1995 50.9935801122557 1996 50.767553098658404 1997 50.555978205576245 1998 50.38827698553114 1999 50.34667338301112 2000 50.40338626013563 2001 50.4184786615306 2002 50.472118677709446 2003 50.54585982754676 2004 50.61700594983798 2005 50.68128058139383 2006 50.530916373100375 2007 50.35078617180897 2008 50.12057267601669 2009 49.84429880208453 2010 49.53991190862548 2011 49.2163104962202 2012 49.196957057328966 2013 49.183902716219976 2014 49.18381417819121 2015 49.18932084038467 2016 49.195842391764906 2017 49.2087047912251 2018 49.01341974181271 2019 48.834437073200846 2020 48.50389590361549 2021 48.60747533845699 2022 48.44654936793449 2023 48.47331310086312