Cambodia has a population of more than 15 million residents. The government is a constitutional monarchy operated as a parliamentary representative democracy. Cambodia’s economy follows an open market system and has seen rapid economic progress in the last decade. In 2014, it had a GDP of $16.71 billion. Cambodia's two largest industries are textiles and tourism. Agricultural activities remain the main source of income for many Cambodians living in rural areas. The service sector is heavily concentrated on trading activities and catering-related services.