Great Britain first sent an official representative to the area in the late 18th century but Belize was not formally termed the "Colony of British Honduras" until 1840. It became a crown colony in 1862. Subsequently, several constitutional changes were enacted to expand representative government. Full internal self-government under a ministerial system was granted in January 1964. The official name of the territory was changed from British Honduras to Belize in June 1973, and full independence was granted on September 21, 1981; territorial disputes between the UK and Guatemala delayed the independence of Belize (formerly British Honduras) until then. Guatemala refused to recognize the new nation until 1992. Tourism has become the mainstay of the economy. The country remains plagued by high unemployment, growing involvement in the South American drug trade, and increased urban crime.