The tertiary sector comprises services such as transport, storage, communications, tourism, banking, insurance and real estate. In 2011–2012, it contributed 63.22% of the state's GDP, agriculture and allied sectors contributed 15.73%, while manufacturing, construction and utilities contributed 21.05%. Nearly half of Kerala's people depend on agriculture alone for income. Around 600 varieties of rice, which is Kerala's most used staple and cereal crop, are harvested from 3105.21 km2; a decline from 5883.4 km2 in 1990. 688,859 tonnes of rice are produced per year. Other key crops include coconut; 899,198 ha, tea, coffee; 23% of Indian production, or 57,000 tonnes, rubber, cashews, and spices—including pepper, cardamom, vanilla, cinnamon, and nutmeg.