Mozambique is endowed with rich and extensive natural resources. The country's economy is based largely on agriculture, but industry is growing, mainly food and beverages, chemical manufacturing and aluminium and petroleum production. The tourism sector is also expanding. South Africa is Mozambique's main trading partner and source of foreign direct investment, while Belgium, Brazil, Portugal and Spain are also among the country's most important economic partners. Since 2001, Mozambique's annual average GDP growth has been among the world's highest. However, the country is still one of the poorest and most underdeveloped countries in the world, ranking low in GDP per capita, human development, measures of inequality and average life expectancy.