The share of workers represented by unions held steady in 2015, matching the historic low of 12.3% set the prior year and reflecting gains in unionization that kept pace with overall U.S. job growth, a Labor Department report showed.
 
The unionization rate has fallen dramatically from 23.3% in 1983, when the government began tracking comparable data.
 
The number of workers covered by collective-bargaining agreements, regardless of whether they were union members, rose by 289,000 last year to 16.44 million, the figures showed. On a percentage basis, the growth in the unionized labor force matched ...