| Day | Rate | Set date |
|---|---|---|
| 1 September | 18.0400 | .. |
| 5 September | 18.5800 | .. |
| 6 September | 18.3600 | .. |
| 7 September | 18.2700 | .. |
| 8 September | 18.4400 | .. |
| 11 September | 18.4700 | .. |
| 12 September | 18.6400 | .. |
| 13 September | 18.5400 | .. |
| 14 September | 18.8500 | .. |
| 15 September | 18.9200 | .. |
| 18 September | 18.9300 | .. |
| 19 September | 18.9500 | .. |
| 20 September | 18.6900 | .. |
| 21 September | 17.5600 | .. |
| 22 September | 17.2500 | .. |
| 25 September | 17.4700 | .. |
| 26 September | 17.3300 | .. |
| 27 September | 17.5700 | .. |
| 28 September | 17.7600 | .. |
| 29 September | 17.5400 | .. |