The largest wave of immigration in history from a single country to the United States has come to a standstill. After four decades that brought 12 million current immigrants—more than half of whom came illegally—the net migration flow from Mexico to the U.S. has stopped and may have reversed.
The standstill appears to result from the weakened U.S. job market, heightened border enforcement, a rise in deportations, the growing dangers associated with illegal border crossings, and changing economic and demographic conditions in Mexico. In addition Mexican households are becoming smaller, with fewer births per capita. Money made in the US can stretch further in Mexico, contributing to the advantages of returning home for both legal and undocumented immigrants.
Mexican immigration exceeded Italian immigration in numbers, but not in the percentage of the contemporary American population, so the largest percentage immigration remains from Italy.
Unauthorized Immigrant Population: National and State Trends, 2010
Between Two Worlds: How Young Latinos Come of Age in America