http://www.bls.gov/news.release/pdf/union2.pd Industry
and Occupation of Union Members In 2013, 7.2 million employees in the public
sector belonged to a union, compared with 7.3 million workers in the private
sector
The
union membership rate for public-sector workers (35.3 percent) was
substantially higher than the rate for private-sector workers (6.7 percent).
Within the public sector, the union
membership rate was highest for local government (40.8 percent), which includes employees in heavily
unionized occupations, such as teachers, police officers, and firefighters. In
the private sector, industries with high unionization rates included utilities (25.6
percent), transportation and warehousing (19.6 percent), telecommunications (14.4
percent), and construction (14.1 percent). Low unionization rates occurred in
agriculture and related industries (1.0 percent), finance (1.0 percent), and in
food services and drinking places (1.3 percent).
Advice USA dept labour report
