Major exports include prawns, cotton, cashew nuts, sugar, citrus, copra and coconuts, and timber. Main agricultural productions are coconuts (copra), vegetables and fruits. Coconuts, ginger, and copra are also significant. Copra and abaca were exported in large quantities. Other important cash crops and exports include copra, cacao and palm oil. The all-wet process uses coconut milk extracted from raw coconut rather than dried copra. It takes around 6,000 full-grown coconuts to produce one tonne of copra. The city's primary agricultural produce includes rice, corn, vegetables, rootcrops, coconut, copra and bananas. Thousands of local workers were hired as cheap labor on cocoa and copra plantations. The chief exports include cotton, sugar, chromite, sisal, copra, and hardwood. Tahiti also exports vanilla, fruits, flowers, monoi, fish, copra oil, and noni. Hayes continued to trade in coconut oil, copra and blackbirding. Coconut plantations began to revive in 2006, owing to the steep rise in copra prices. Industries include copra, handicrafts, fishing, and lumber. These methods, however, are less efficient than coconut oil production from copra.