Emmigration:  

The scarcity of resources and lengthy droughts, which have always affected the country, meant that its inhabitants were often forced to seek a better standard of living elsewhere. Indeed, the migrated population (500,000) actually exceeds the resident population (420,000), yet those who have moved away maintain close ties with their homeland. Evidence of this can be found in the culture and especially the music of the country, yet it is also one of the driving forces behind the country’s development, with money sent home by emigrants representing an important source of income for the local population.