| Day | Rate | Set date |
|---|---|---|
| 1 September | 18.4300 | .. |
| 2 September | 18.4400 | .. |
| 3 September | 18.3700 | .. |
| 4 September | 18.2600 | .. |
| 5 September | 18.4700 | .. |
| 8 September | 18.3300 | .. |
| 9 September | 18.2800 | .. |
| 10 September | 18.3000 | .. |
| 11 September | 18.3000 | .. |
| 12 September | 18.2600 | .. |
| 15 September | 18.2300 | .. |
| 16 September | 18.5800 | .. |
| 17 September | 18.4100 | .. |
| 18 September | 18.4100 | .. |
| 19 September | 18.4000 | .. |
| 22 September | 18.6300 | .. |
| 23 September | 18.6400 | .. |
| 24 September | 18.8000 | .. |
| 25 September | 19.1400 | .. |
| 26 September | 19.5600 | .. |
| 29 September | 19.9500 | .. |
| 30 September | 19.9000 | .. |