Sugar plantations in the Caribbean were a major part of the economy of the islands in the 18th, 19th, and 20th centuries. Most Caribbean islands were covered with sugar cane fields and mills for refining the crop. The main source of labor, until the abolition of chattel slavery, was enslaved Africans. After the abolition of slavery, indentured laborers from India, China, Portugal and other places were brought to the Caribbean to work in the sugar industry. These plantations produced 80 to 90 percent of the sugar consumed in Western Europe,[1] later supplanted by European-grown sugar beet.