A very interesting story here:

FORT LAUDERDALE Fla., February 8, 2007 — The Employee Confidence Index for U.S. workers in the industrial, manufacturing and construction industries declined 1.7 points to 53.0 in the fourth quarter of 2006, according to the latest Spherion^® Employment Report survey conducted by Harris Interactive^® on behalf of Spherion Corporation. The decline is in contrast to the U.S. Employee Confidence Index, which rose 2.3 points in the same period.

http://www.spherion.com/press/Industrial-Manufacturing_4Q06_employment_rpt.jsp