45 million euro grant from Norway and contributions of 8 million euros from the Zanzibar government and 4 million euros from the Tanzanian national government. The project ended years of dependence on unreliable and erratic diesel generation subject to frequent power cuts. Only about 20 percent of the cable's capacity was being used in January 2011, so it is anticipated that the cable will meet the island's needs for 20 to 25 years."Reliable electricity attracts investors to Pemba" , Norway: The Official Site in Tanzania, 28 January 2011. Between 70 and 75 percent of the electricity generated is used domestically while less than 20 percent is used industrially. Fuel wood, charcoal and kerosene are widely used as sources of energy for cooking and lighting for most rural and urban areas. The consumption capacity of petroleum, gas, oil, kerosene and industrial diesel oil is increasing annually, going from a total of 5,650 tons consumed in 1997 to more than 7,500 tons in 1999. From 21 May to 19 June 2008, Unguja suffered a major failure of its electricity system, which left the island without electrical service and mostly dependent on diesel generators. The failure originated in mainland Tanzania. Another blackout happened from 10 December 2009 to 23 March 2010, caused by a problem with the submarine cable that formerly supplied electricity from mainland Tanzania. This led to a serious shock to Unguja's fragile economy, which is heavily dependent on foreign tourism. Transport Roads Zanzibar has 1,600 kilometres of roads, of which 85 percent are tarmacked or semi-tarmacked. The remainder are earth roads, which are rehabilitated annually to make them passable throughout the year.. Zanzibar, to ensure the roads are passable at all times and are maintained had established a Road Fund Board, situated at maisala which collects funds and disburses to Ministry of Communication, whom is the Road Agency at this time through the Department of Road Maintenance, known as UUB. The Road Fund Board, oversees a Performance Agreement entered between the Ministry of Communication and Infrastructure, while all the procurements and maintenances are assumed by the later. Public transportation There is no government-owned public transportation in Zanzibar. The privately owned Daladala, as it is officially known in Zanzibar, is the only kind of public transportation. The term Daladala originated from the Kiswahili word DALA(Dollar) or five shillings during the 1970s and 1980s when public transport cost five shillings to travel