Exact population: 3,927,188 (July 2006 est.) Literacy: Total population: 94.1%; male: 93.9%; female: 94.4% Ethnicities: White (mostly Spanish origin) 80.5%, black 8%, Amerindian 0.4%, Asian 0.2%, mixed and other 10.9% Land boundaries: 0 km Terrain: Mostly mountains with coastal plain belt in north; mountains precipitous to sea on west coast; sandy beaches along most coastal areas Extremes: Lowest point: Caribbean Sea 0 m; highest point: Cerro de Punta 1,338 m Imports: US 55.0%, Ireland 23.7%, Japan 5.4% (2004) Exports: US 90.3%, UK 1.6%, Netherlands 1.4%, Dominican Republic 1.4% (2004) Industries: Pharmaceuticals, electronics, apparel, food products, tourism
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 "Flag of Puerto Rico")
 "Map of Puerto Rico")
 "Worldmap of Puerto Rico")
 "Money from Puerto Rico")