Since what year has Puerto Rico been recognized as a commonwealth of the United States?

Puerto Rico has been recognized as a commonwealth of the United States since 1952. This designation came about through the approval of the Puerto Rican Constitution, which was ratified by the people of Puerto Rico and subsequently accepted by the U.S. Congress. This political status allows Puerto Rico a certain degree of administrative autonomy while still being under U.S. jurisdiction. The relationship is characterized by local self-governance in matters of local affairs, but the residents of Puerto Rico do not have voting representation in the U.S. Congress, and federal laws apply to the territory. Other years listed do not align with the establishment of this commonwealth status; thus, they do not reflect the historical context of Puerto Rico's relationship with the United States.