Year Percent of total labor force (Units) 2001 6.375 2002 6.275 2003 6.050 2004 4.875 2005 4.150 2006 3.775 2007 3.050 2008 3.025 2009 3.550 2010 2.825 2011 2.575 2012 2.000 2013 1.850 2014 1.700 2015 1.825 2016 1.900 2017 1.975 2018 1.800 2019 1.725 2020 2.550 2021 2.950 2022 3.675 2023 2.650 2024 2.000 2025 1.900 2026 1.800 2027 1.700 2028 1.700 2029 1.700