Survey data from the U.S. and Mexico reveal a large flow of migrants back to Mexico, but the size of the return flow appears to be stable since 2006. As for immigration to the U.S. from Mexico, surveys from both countries attest to recent substantial decreases in the number of new arrivals, reinforced by U.S. Border Patrol data showing markedly reduced apprehensions of Mexicans trying to cross into the United States illegally.