Immigration to the U.S. from Mexico has virtually stopped, the Pew Research Center says in a new study released Monday. Citing data from Mexican and U.S. government sources, the study says that a weakened American economy, fewer employment opportunities, and stricter immigration enforcement have combined to keep many would-be migrants south of the border. The numbers have been on the decline for years—1 million immigrants were caught trying to cross the border in 2005, but six years later that number had dropped to 286,000. Constituting the largest influx of immigrants from a single country that the United States has ever seen, about 12 million Mexicans came to the country over the past 40 years.
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