| | | Closing exchange rate | | Effect of 10% strengthening of $ on net earnings and equity $000 | | ||
| At December 31, 2017 | | | | | | | |
| Euro (EUR) | | | 0.8347 | | | 940 | |
| Communauté Financi?re Africaine franc (CFA) | | | 547.53 | | | (1,723) | |
| South African rand (ZAR) | | | 12.36 | | | (8) | |
| British pound (GBP) | | | 0.74 | | | 1 | |
| At December 31, 2016 | | | | | | | |
| Euro (EUR) | | | 0.9490 | | | 654 | |
| Communauté Financi?re Africaine franc (CFA) | | | 623.30 | | | 365 | |
| South African rand (ZAR) | | | 13.65 | | | (61) | |
| British pound (GBP) | | | 0.81 | | | (62) | |