| Operating revenues | 2,261,856a | 2,055,928a |
| Cost of sales | -1,843,542a | -1,642,263a |
| Gross income | 418,314a | 413,665a |
| Selling, general and administrative expenses | -221,675a | -205,754a |
| Operating income | 196,639a | 207,911a |
| Other income (expenses) | — | — |
| Interest income | 3,725a | 1,294a |
| Dividend income | 2,295a | 1,311a |
| Share of profit of entities accounted for using equity method | 1,592a | 1,060a |
| Foreign exchange gain, net | 2,485a | 4,459a |
| Gain on sales of assets | 515a | 2,265a |
| Gain on donation of non-current assets | 1,043a | 367a |
| Compensation income | 19,508a | 14,404a |
| Interest expenses | -23,359a | -23,324a |
| Loss on sales of assets | -180a | -50a |
| Loss on disposal of assets | -6,766a | -4,866a |
| Other, net | -931a | 7a |
| Other income (expenses), net | -73a | -3,073a |
| Income before income taxes | 196,566a | 204,838a |
| Income taxes | — | — |
| Current | -5,458a | -5,971a |
| Deferred | -37,230a | -40,540a |
| Total income taxes | -42,688a | -46,511a |
| Net income | 153,878a | 158,327a |
| Net income attributable to non-controlling interests | 851a | 1,230a |
| Net income attributable to owners of the parent | 153,027a | 157,097a |