204th in the world. The services sector accounted for 66% of GDP, followed by industry and agriculture at 23.6% and 10.4% respectively. For the same year, the Samoan labour force was estimated at 50,700. The Central Bank of Samoa issues and regulates Samoa's currency, the Samoan tālā. The economy of Samoa has traditionally depended on agriculture and fishing at the local level. In modern times, development aid, private family remittances from overseas, and agricultural exports have become key factors in the nation's economy. Agriculture employs two-thirds of the labour force and furnishes 90% of exports, featuring coconut cream, coconut oil, noni (juice of the nonu fruit, as it is known in Samoan), and copra. Sixty percent of Samoa's electricity comes from renewable hydro, solar, and wind sources, with the remainder produced by diesel generators. The Electric Power Corporation set a goal of 100% renewable energy by 2021. Agriculture In the period before German colonisation (from the late 19th century), Samoa produced mostly copra. German merchants and settlers were active in introducing large-scale plantation operations and in developing new industries, notably cocoa beans and rubber, relying on imported labourers from China and Melanesia. When the value of natural rubber fell drastically, about the end of the Great War (World War I) in 1918, the New Zealand government encouraged the production of bananas, for which there is a large market in New Zealand. Because of variations in altitude, Samoa can cultivate a large range of tropical and subtropical crops. Land is not generally available to outside interests. Of the total land area of , about 24.4% is in permanent crops and another 21.2% is arable. About 4.4% is Western Samoan Trust Estates Corporation (WSTEC). The staple products of Samoa are copra (dried coconut meat), cocoa beans (for chocolate), rubber, and bananas. The annual production of both bananas and copra has been in the range of 13,000 to 15,000 metric tons (about 14,500 to 16,500 short tons). If the Asiatic rhinoceros beetle in Samoa were eradicated, Samoa could produce in excess of 40,000 metric tons (44,000 short tons) of copra. Samoan cocoa beans are of very high quality and are used in fine New Zealand chocolates. Most are Criollo-Forastero hybrids. Coffee grows well, but production has been uneven. WESTEC is the biggest coffee producer. Other agricultural industries have proven less successful. Sugarcane production was originally established by Germans in the early 20th century.