
One year since Hurricane Maria made landfall in Puerto Rico on September 20, 2017, nearly 160,000 residents of the island have relocated to the United States. This exodus represents one of the most significant movements of Puerto Ricans to the U.S. mainland in the island’s history in terms of both volume and duration. The new emigration estimates — of 159,415 with an upper bound confidence interval of 176,603 — is as high as the net migration flow in the previous two years combined (144,801).