The Noril'sk Nickel Joint-Stock Company dominates Russia's nonferrous metallurgy industries. It controls nearly all of the country's aluminum and nickel production and 60 percent of copper production. The largest operations in the industry are Noril'sk Nickel in northwestern Siberia and Bratsk Aluminum, Krasnoyarsk Aluminum, and Sayan Aluminum in south-central Siberia. More than 90 percent of Russia's aluminum comes from six smelters. Some smelters have been privatized and export their semifinished products. Inputs, especially alumina (of which Russia has little), became much more expensive in the mid-1990s, as did transportation and electricity costs. At the same time, export revenues fell.