The economy of Ecuador has become service-based, although a small percentage of the workforce still engages in agriculture. Rice, potatoes, manioc, and plantains are grown for subsistence, bananas, coffee, and cacao are the main cash crops. Cattle, sheep, and pigs are raised, and there is fishing and lumbering. Petroleum is the country's largest industry, others include food processing, tourism, and the manufacture of textiles, wood products, and chemicals. Oil is Ecuador's leading export, other exports include forest products (notably balsawood), sugar, and rice. Vehicles, medicines, telecommunications equipment, and electricity are the main imports. The United States, Colombia, Peru, Venezuela, and Brazil are its chief trading partners. A large number of Ecuador tenders and RFP's floats from Consultancy, Education services and Environmental services.