| Thousands of U.S. dollars | |||
| Net carrying amount of asset | |||
| 2016 | 2017 | ||
| Finance leases | |||
| Plant and machinery | 2,386 | 1,847 | |
| Furniture, tools and other tangible assets | 1,422 | 6,619 | |
| Software | - | 6,796 | |
| Total | 3,808 | 15,262 | |
| Thousands of U.S. dollars | |||
| 2016 | 2017 | ||
| Up to 1 year (Note 17) | 2,205 | 4,260 | |
| Between 1 and 5 years (Note 17) | 1,431 | 6,238 | |
| Total | 3,636 | 10,498 | |