They were not as successful at economic development and annual revenues plunged to less than what it was under the Danes. prompting an outmigration to then U.S. controlled territories like Cuba. EXTENSIONS OF REMARKS. Vol. 153. Pt. 4 Puerto Rico. Panama and the mainland. During that time. new immigrants from Puerto Rico and the mainland and an increased birthrate due to better sanitation bolstered the population numbers. It was in 1931 that the Department of the Interior was given the authority to administer the islands and charged with the economic regeneration of the islands. It was during that time that the first civilian governor was appointed.
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immigrants