Year Percent of total labor force 2001 6.375 2002 6.275 2003 6.05 2004 4.875 2005 4.15 2006 3.775 2007 3.05 2008 3.025 2009 3.55 2010 2.825 2011 2.575 2012 2 2013 1.85 2014 1.7 2015 1.825 2016 1.9 2017 1.975 2018 1.8 2019 1.8 2020 1.8 2021 1.8 2022 1.8 2023 1.8 2024 1.8