Figure 3. U.S. Natural Gas Production Shares for Major and Non-Major U.S. Petroleum Companies by Region, 1986-1997

Sources: FRS Companies: Financial Analysis Team, Office of Energy Markets and End Use, Energy Information Administration (Financial Reporting System);
Total United States: Energy Information Administration, U.S. Crude Oil, Natural Gas, and Natural Gas Liquids Reserves 1997 Annual Report, DOE/EIA-0216(97) (Washington, DC, September 1998), and preceeding issues.