Gazprom Libya, Kazakhstan, Uzbekistan, Kyrgyzstan and Tajikistan. Gazprom's Unified Gas Supply System (UGSS) includes of gas trunklines and branches and 218 compressor stations with a 41.4 GW capacity. The UGSS is the largest gas transmission system in the world. In 2008, the transportation system carried of gas. The UGSS has reached its capacity. Major transmission projects include the Nord Stream and South Stream pipelines, as well as pipelines inside Russia. In 2006, Gazprom sold of gas to domestic customers; to the rest of Europe; and to CIS countries and the Baltic states. Gazprom receives about 60 percent of its revenue from
Gazprom Promgaz for gas supply of South Ossetia and Armenia. Gazprom Promgaz plans gas transportation and its distribution systems, as well as investigating various research in the field of natural gas. The company is the general planner of the natural gas supply program for Russian regions, developed by Gazprom. The company is also a research center of Gazprom in the field of regional power systems, the supply, distribution and use of gas, efficient energy use and energy-savings, price setting for construction of gas industry objectives, the development of regional hydrocarbon fields and development of non-traditional hydrocarbon resources including coal bed methane. Gazprom