Union membership drops to historic low.

“The number of wage and salary workers who were union members dropped to 12 percent of the work force last year,” the AP reports, “the lowest percentage since the government started tracking that number over two decades ago.” Workers represented by unions earn 28 percent more than nonunion workers, are 62 percent more likely to have medical insurance through their jobs, and are four-and-a-half times as likely to have guaranteed pensions.