| Operating revenue | 0.28a | 0.24a | 0.23a | 0.19a | 0.26a | 0.25a |
| Operating costs | -0.15a | -0.14a | -0.13a | -0.12a | -0.15a | -0.14a |
| Selling, general and administrative expenses | -0.07a | -0.06a | -0.05a | -0.05a | -0.06a | -0.06a |
| Operating profit | 0.06a | 0.04a | 0.04a | 0.02a | 0.05a | 0.04a |
| Ordinary profit | 0.06a | 0.05a | 0.04a | 0.02a | 0.06a | 0.05a |
| Profit attributable to owners of parent | 0.05a | 0.03a | 0.03a | 0.01a | 0.04a | 0.03a |