UPDATE 1-UAW union gained more than 12,000 members in 2014 -filing
March 31, 2015 at 16:48 PM EDT
DETROIT, March 31 (Reuters) - Membership in the United Auto Workers union rose by more than 12,000 people to 403,466 in 2014, the fifth consecutive year of small gains for the American union, according to an annual filing with the U.S. Department of Labor.