| Day | Rate | Set date |
|---|---|---|
| 1 July | 19.4700 | .. |
| 2 July | 19.0500 | .. |
| 3 July | 19.3100 | .. |
| 4 July | 19.5200 | .. |
| 5 July | 19.7400 | .. |
| 8 July | 19.3500 | .. |
| 9 July | 19.5300 | .. |
| 10 July | 19.6400 | .. |
| 11 July | 20.0400 | .. |
| 12 July | 20.0100 | .. |
| 15 July | 20.4500 | .. |
| 16 July | 20.4600 | .. |
| 17 July | 19.4000 | .. |
| 18 July | 19.4300 | .. |
| 19 July | 19.2200 | .. |
| 22 July | 19.1700 | .. |
| 23 July | 19.4100 | .. |
| 24 July | 19.0700 | .. |
| 25 July | 19.2200 | .. |
| 26 July | 18.7200 | .. |
| 29 July | 18.8900 | .. |
| 30 July | 18.7700 | .. |
| 31 July | 18.9000 | .. |