| Day | Rate | Set date |
|---|---|---|
| 1 July | 18.8000 | .. |
| 2 July | 18.9200 | .. |
| 3 July | 18.2100 | .. |
| 4 July | 18.0600 | .. |
| 7 July | 18.1900 | .. |
| 8 July | 18.3800 | .. |
| 9 July | 18.2200 | .. |
| 10 July | 17.9600 | .. |
| 11 July | 18.0900 | .. |
| 14 July | 17.8200 | .. |
| 15 July | 18.3900 | .. |
| 16 July | 18.4000 | .. |
| 17 July | 18.6900 | .. |
| 18 July | 18.1200 | .. |
| 21 July | 18.0900 | .. |
| 22 July | 18.2200 | .. |
| 23 July | 18.3900 | .. |
| 24 July | 18.4400 | .. |
| 25 July | 18.5300 | .. |
| 28 July | 18.4100 | .. |
| 29 July | 18.5900 | .. |
| 30 July | 18.9700 | .. |
| 31 July | 18.9400 | .. |