11.8 Percent (14.8 Million Workers) in Unions•Public-sector workers had a union membership rate (37.0 percent) more than five times higher than that of private-sector workers (6.9 percent).•7.6 million employees in the public sector belonged to a union, compared with 7.2 million union workers in the private sector. •Workers in education, training, and library occupations had the highest unionization rate, at 36.8 percent, while the lowest rate occurred in sales and related occupations (3.0 percent).