| Day | Rate | Set date |
|---|---|---|
| 1 February | 80.9400 | 01.02.2018 |
| 2 February | 80.4100 | 02.02.2018 |
| 5 February | 79.2700 | 05.02.2018 |
| 6 February | 80.4400 | 06.02.2018 |
| 7 February | 79.1400 | 07.02.2018 |
| 8 February | 78.4800 | 08.02.2018 |
| 9 February | 78.8300 | 09.02.2018 |
| 12 February | 78.9200 | 12.02.2018 |
| 13 February | 78.4400 | 13.02.2018 |
| 14 February | 78.8700 | 14.02.2018 |
| 15 February | 78.6200 | 15.02.2018 |
| 16 February | 78.5600 | 16.02.2018 |
| 19 February | 78.5800 | 19.02.2018 |
| 20 February | 78.8700 | 20.02.2018 |
| 21 February | 78.8800 | 21.02.2018 |
| 22 February | 78.3600 | 22.02.2018 |
| 23 February | 77.9200 | 23.02.2018 |
| 26 February | 78.1000 | 26.02.2018 |
| 27 February | 77.6700 | 27.02.2018 |
| 28 February | 76.9400 | 28.02.2018 |