| Day | Rate | Set date |
|---|---|---|
| 1 August | 20.2800 | .. |
| 4 August | 20.7500 | .. |
| 5 August | 20.8100 | .. |
| 6 August | 20.4600 | .. |
| 7 August | 20.0900 | .. |
| 8 August | 19.5400 | .. |
| 11 August | 19.6900 | .. |
| 12 August | 19.9900 | .. |
| 13 August | 20.1900 | .. |
| 14 August | 20.0800 | .. |
| 15 August | 20.0700 | .. |
| 18 August | 19.9100 | .. |
| 19 August | 20.1200 | .. |
| 20 August | 20.0600 | .. |
| 21 August | 19.6600 | .. |
| 22 August | 19.7000 | .. |
| 25 August | 19.2600 | .. |
| 26 August | 19.2800 | .. |
| 27 August | 19.7300 | .. |
| 28 August | 19.5800 | .. |
| 29 August | 19.6100 | .. |