significantly to GDP growth in 2005. The construction industry, about half of which is state-owned, has suffered from low investment in capital projects and from shoddy workmanship that has discouraged international contracts. However, new infrastructure projects and increased housing construction brought a 60% increase in output from 2004 to 2005. As of 2009, one third of industrial plants and factories are inactive, according to Tajikistan's Institute of Economic Studies. Industrial output has fallen by 13% in the first six months of 2009, leading to a fall in export revenues of 48%. Energy The rivers of Tajikistan, such as the Vakhsh and the Panj, have great hydropower potential, and the government has focused on attracting investment for projects for internal use and electricity exports. Tajikistan is home to the hydroelectric power station Nurek, the second highest dam in the world. Sangtuda 1 Hydroelectric Power Plant of 670 megawatts (MW) capacity, operated by Russian Inter RAO UES, commenced operations on 18 January 2008 and was officially commissioned on 31 July 2009. Other projects at the development stage include Sangduta 2 by Iran, Zerafshan by Chinese SinoHydro and Rogun power plant, which, at , is projected to supersede the Nurek Dam as tallest in the world if completed. The Rogun Dam was originally planned to be built by Russia's Inter RAO UES, but following disagreements, Russia pulled out. In 2010, production resumed with Iranian investment and Chinese assistance. Besides hydropower, other energy resources include sizable coal deposits and smaller reserves of natural gas and petroleum. In December 2010, Russian Gazprom announced discovery of significant natural gas reserves in Sarykamish field with 60 bcm of natural gas, enough for 50 years of Tajikistan's domestic consumption. The national power company is Barqi Tojik. Tajikistan is a partner country of the EU INOGATE energy programme, which has four key topics: enhancing energy security, convergence of member state energy markets on the basis of EU internal energy market principles, supporting sustainable energy development, and attracting investment for energy projects of common and regional interest. Services Throughout the early 2000s, the overall output of the services sector has increased steadily. The banking system has improved significantly because of strengthened oversight by the National Bank of Tajikistan, relaxed restrictions on participation by foreign institutions, and regulatory reform. The system includes 16 commercial banks and the central bank, or National Bank. The state controls the system, although in principle most