| Total operating revenue | 42,837.24a | 46,247.78a |
| Operating revenue | 42,837.24a | 46,247.78a |
| Total operating costs | -39,054.99a | -43,029.67a |
| Operating costs | -37,497.28a | -41,184.21a |
| Taxes and surcharges | -169.24a | -136.93a |
| Selling expenses | -5.83a | -12.95a |
| Administrative expenses | -937.24a | -1,004.82a |
| Research and development expenses | -727.17a | -975.64a |
| Finance costs | -281.78a | -284.87a |
| Interest expense | -4a | -2.84a |
| Interest income | 293.27a | 304.18a |
| Other income | 59.15a | 123.36a |
| Investment income (loss) | 2.59a | 16.12a |