| Day | Rate | Set date |
|---|---|---|
| 2 August | 20.4500 | .. |
| 3 August | 20.3000 | .. |
| 4 August | 20.4400 | .. |
| 5 August | 20.5600 | .. |
| 6 August | 20.8800 | .. |
| 9 August | 21.2700 | .. |
| 10 August | 21.3000 | .. |
| 11 August | 21.5200 | .. |
| 12 August | 21.4800 | .. |
| 13 August | 21.6700 | .. |
| 16 August | 21.3600 | .. |
| 17 August | 21.7400 | .. |
| 18 August | 21.5200 | .. |
| 19 August | 21.7700 | .. |
| 20 August | 21.6500 | .. |
| 23 August | 21.8400 | .. |
| 24 August | 21.4700 | .. |
| 25 August | 20.5800 | .. |
| 26 August | 20.9500 | .. |
| 27 August | 21.2700 | .. |
| 30 August | 22.0100 | .. |
| 31 August | 22.1100 | .. |