Bureau official : `` Between '07 and A recent study by the Pew Hispanic Center concluded that emigration from Mexico , the largest source of immigrants to the United States , slowed at least 40 percent between mid-decade and 2008 , based on national population surveys in the United States and Mexico , as well as Border Patrol apprehension figures . '08 there really was n't '' much immigration change . The numbers were pretty stable, but the number of people coming in from Mexico dropped off a cliff after that year. " Mexican-born population in U.S. dropped by about 300,000 between 2007 and 2008 .
Bureau official : `` Between '07 and '08 there really was n't '' much immigration change . The numbers were pretty stable, but the number of people coming in from Mexico dropped off a cliff after that year. " Mexican-born population in U.S. dropped by about 300,000 between 2007 and 2008 .