(In millions, except per share amounts) 1999 Revenues Natural gas and other products $19,536 Electricity Transportation Other Total revenues 15,238 588 4,750 40,112 Year ended December 31, 1998 1997 $13,276 13,939 627 $13,211 5,101 652 3,418 31,260 1,309 20,273 Costs and Expenses Cost of gas, electricity and other products 34,761 26,381 17,311 Operating expenses 2,996 2,352 1,406 Oil and gas exploration expenses 49 121 102 Depreciation, depletion and amortization 870 827 600 Taxes, other than income taxes Impairment of long-lived assets Contract restructuring charge Total costs and expenses Operating Income 193 201 164 441 675 39,310 29,882 20,258 802 1,378 15 Other Income and Deductions Equity in earnings of unconsolidated equity affiliates 309 97 216 Gains on sales of assets and investments 541 56 186 Interest income 162 88 70 Other income, net 181 (37) 78 Income Before Interest, Minority Interests and Income Taxes 1,995 1,582 565 Interest and related charges, net 656 550 401 Dividends on company-obligated preferred securities of subsidiaries 76 77 69 Minority interests 135 77 80 Income tax expense (benefit) 104 175 (90) Net income before cumulative effect of accounting changes 1,024 703 105 Cumulative effect of accounting changes, net of tax Net Income (131) 893 703 105