It just gets worse for workers.

BLS via WSJ:

The percentage of the workforce represented by unions fell slightly in 2014 to 11.1%, down from 11.3% the year before, continuing a trend of stagnation that suggests labor will have to work harder to rebound from its decadeslong slide.

Figures released by the Bureau of Labor Statistics said union membership in the private sector in 2014 fell to a rate of 6.6% from 6.7% in 2013.