Tools
| Year ended December 31, 2019 | Year ended December 31, 2018 | |
|---|---|---|
| Cost of production fuel | 4,203 | 3,854 |
| Use of repair and consumable materials | 602 | 524 |
| Energy consumption | 245 | 175 |
| Other | 320 | 347 |
| TOTAL MATERIALS AND ENERGY CONSUMPTION | 5,370 | 4,900 |
