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CONSOLIDATED STATEMENTS OF EARNINGS - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Operating revenues |  |  |
Total operating revenues | $ 47,071 | $ 39,087 | $ 50,069
Operating expenses |  |  |
Operating and administrative | 6,712 | 6,749 | 6,991
Depreciation and amortization | 3,852 | 3,712 | 3,391
Impairment of long-lived assets | 0 | 0 | 423
Total operating expenses | 39,266 | 31,130 | 41,809
Operating income | 7,805 | 7,957 | 8,260
Income from equity investments (Note 13) | 1,711 | 1,136 | 1,503
Impairment of equity investments (Note 13) | (111) | (2,351) | 0
Other income/(expense) |  |  |
Net foreign currency gain | 286 | 181 | 477
Gain/(loss) on dispositions | 319 | (17) | (300)
Other | 374 | 74 | 258
Interest expense (Note 18) | (2,655) | (2,790) | (2,663)
Earnings before income taxes | 7,729 | 4,190 | 7,535
Income tax expense (Note 25) | (1,415) | (774) | (1,708)
Earnings | 6,314 | 3,416 | 5,827
Earnings attributable to noncontrolling interests | (125) | (53) | (122)
Earnings attributable to controlling interests | 6,189 | 3,363 | 5,705
Preference share dividends | (373) | (380) | (383)
Earnings attributable to common shareholders | $ 5,816 | $ 2,983 | $ 5,322
Earnings/(loss) per common share attributable to common shareholders (in CAD per share) | $ 2.87 | $ 1.48 | $ 2.64
Diluted earnings/(loss) per common share attributable to common shareholders (in CAD per share) | $ 2.87 | $ 1.48 | $ 2.63
Commodity sales |  |  |
Operating revenues |  |  |
Total operating revenues | $ 26,873 | $ 19,259 | $ 29,309
Operating expenses |  |  |
Operating costs | 26,608 | 18,890 | 28,802
Gas distribution revenue |  |  |
Operating revenues |  |  |
Total operating revenues | 4,026 | 3,663 | 4,205
Operating expenses |  |  |
Operating costs | 2,094 | 1,779 | 2,202
Transportation and other services |  |  |
Operating revenues |  |  |
Total operating revenues | $ 16,172 | $ 16,165 | $ 16,555

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