WASHINGTON (AP) - The number of Mexican immigrants living illegally in the U.S. has dropped significantly for the first time in decades, a dramatic shift as many illegal workers, already in the U.S. and seeing few job opportunities, return to Mexico. An analysis of census data from the U.S. and Mexican governments details the movement to and from Mexico, a nation accounting for nearly 60 percent of the illegal immigrants in the U.S. It comes amid renewed debate over U.S. immigration policy as the Supreme Court hears arguments this week on border state Arizona's tough immigration law.
Roughly 6.1 million unauthorized Mexican immigrants were living in the U.S. last year, down from a peak of nearly 7 million in 2007, according to the Pew Hispanic Center study released Monday. It was the biggest sustained drop in modern history, believed to be surpassed in scale only by losses in the Mexican-born U.S. population during the Great Depression.