This should not surprise anyone who is actually out there trying to organize workers:

Over the last quarter century, the unionized workforce has changed dramatically, according to this new CEPR report. In 2008, union workers reflected trends in the workforce as a whole toward a greater share of women, Latinos, Asian Pacific Americans, older, more-educated workers, and a shift out of manufacturing toward services.

   You can read the whole report put out by my friends at the Center for Economic and Policy Research.