Year	% of total labor force (national estimate)
2005	11.17388888334769
2006	10.27038400351869
2007	9.61351496160808
2008	9.945122316536333
2009	9.467145280348603
2010	9.209550059986737
2012	10.56074223814516
2014	10.721564560358814
2016	9.629349127676338