According to the U.S. Department of Energy, Indian land represents a very small percent of the United States' land base, but contains an estimated 10 percent of the Nation's energy resources. In a combined area slightly larger than the state of Utah, Indian Country has approximately 17,500 active oil and gas leases. Five of the 12 BIA regions (Eastern Oklahoma, Great Plains, Rocky Mountain, Southern Plains, and Western) contain 96 percent of these oil and gas leases. Of these active leases, about 10,700 were issued in the past 5 years. Royalties received from Indian leases exceeded $430 million for fiscal year (FY) 2011.