Year	% of total labor force (national estimate)
2005	30.31
2007	19.4
2008	17.15
2009	19.09
2010	19.649
2011	19.759
2012	19.808
2013	19.585
2014	18.054
2015	17.555
2016	17.732
2017	16.082
2018	15.19
2019	15.128
2020	17.878
2021	16.543