The noun Puerto Rico is a proper noun; proper nouns are always capitalized.
The possessive form is Puerto Rico's.
Puerto Rico's economy has moved from agriculture to an industry and service based economy .
Commonwealth of Puerto Rico
Puerto Rico is a commonwealth of the United States.
PR
00731
No
Dahalay, Gus, and ara
Fried plantains.
Sausage
multi-color
Peurto Rican's
The Dominican Republic is the closest country to Puerto Rico.
The governor of Puerto Rico is the mediocre Luis Fortuño!