Climate Climatic conditions vary sharply. In the highlands temperature tends to fall sharply by night. Rainfall takes place from October through April, although it varies from year to year. Both floods and droughts are common. Population density is 7 inhabitants per square kilometer, one of the lowest by world's standards.
Population is concentrated in the highland and valley regions.
Settlement patterns are slowly changing due to migration to the lowlands. Language Spanish is the official language although Aymara, Quechua and other native dialects are spoken widely. Business transactions and business documents and records must be in Spanish for legal purposes. Documents written in a foreign language must be translated and officially notarized to become fully legal. English is commonly used in the business community and it is possible to engage personnel with a full command of a foreign language, in all major cities.