Abstract Puerto Rico has belonged to the United States for more than a century. In 1898, more than two decades after the Spanish American War, Spain formally ceded the island to the United States. Just over 20 years later, islanders officially became American citizens. Since then, the 100-mile-long by 35-mile-wide island has experienced economic and political crises, the COVID-19 pandemic, and life-threatening natural disasters. These events provoked a vast fluctuation in its population.
