The oil pipeline from Golmud to Lhasa is the only pipeline transportation route in Tibet, with a total investment of 232.94 million Yuan and a total length of 1,080 km. There are 11 pumping stations, and one oil diversion station along the route, mainly transporting gasoline, light diesel oil, coal oil for aviation and coal oil for lamps, with an annual transportation capacity of 230,000 to 250,000 tons. Since the operation in October 1977, the pipeline has transported some four million tons of oil. It has seen 30 years of uninterrupted normal operation. In 2006, 114,000 tons of oil was transported, down 3 percent.