| Day | Rate | Set date |
|---|---|---|
| 1 August | 19.4000 | .. |
| 2 August | 19.5900 | .. |
| 5 August | 19.6300 | .. |
| 6 August | 19.6200 | .. |
| 7 August | 19.7600 | .. |
| 8 August | 19.9700 | .. |
| 9 August | 19.9300 | .. |
| 12 August | 20.6600 | .. |
| 13 August | 20.7300 | .. |
| 14 August | 20.6800 | .. |
| 15 August | 20.5700 | .. |
| 16 August | 20.5300 | .. |
| 19 August | 20.8500 | .. |
| 20 August | 20.4700 | .. |
| 21 August | 20.2000 | .. |
| 22 August | 20.7200 | .. |
| 23 August | 20.4100 | .. |
| 27 August | 20.0300 | .. |
| 28 August | 20.2700 | .. |
| 29 August | 20.7500 | .. |
| 30 August | 20.7800 | .. |