| Day | Rate | Set date |
|---|---|---|
| 1 May | 16.1300 | .. |
| 4 May | 15.9500 | .. |
| 5 May | 15.4700 | .. |
| 6 May | 15.3700 | .. |
| 7 May | 15.2400 | .. |
| 8 May | 15.1300 | .. |
| 11 May | 15.1700 | .. |
| 12 May | 15.2400 | .. |
| 13 May | 14.9500 | .. |
| 14 May | 15.0800 | .. |
| 15 May | 14.4700 | .. |
| 18 May | 14.0700 | .. |
| 19 May | 12.9600 | .. |
| 20 May | 14.1800 | .. |
| 21 May | 14.6300 | .. |
| 22 May | 14.7800 | .. |
| 26 May | 14.8200 | .. |
| 27 May | 14.9900 | .. |
| 28 May | 14.8500 | .. |
| 29 May | 15.2000 | .. |