1 Intangible fixed assets
| | 2017 | 2016 |
Book value as at 1 January | 517 | 488 |
Investments | 328 | 247 |
Depreciations | (274) | (218) |
Book value as at 31 December | 571 | 517 |
| | | |
Purchase value | 8,104 | 7,776 |
Cumulative depreciations | (7,533) | (7,259) |
Book value as at 31 December | 571 | 517 |