There was a big spike in legal immigration into the U.S. in 1989-1991, resulting from an amnesty program through which many formerly illegal immigrants became legal residents.

Question

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The Immigration Reform and Control Act (IRCA) of 1986 granted amnesty to certain undocumented immigrants who had entered the United States before January 1, 1982, leading to a significant increase in legal immigration in the following years as these individuals became eligible for legal status.

There Was a Big Spike in Legal Immigration into the U.S