| Day | Rate | Set date |
|---|---|---|
| 1 May | 28.3300 | .. |
| 2 May | 27.5900 | .. |
| 3 May | 28.0700 | .. |
| 4 May | 28.1900 | .. |
| 8 May | 27.9000 | .. |
| 9 May | 28.1500 | .. |
| 10 May | 28.4800 | .. |
| 11 May | 28.1900 | .. |
| 14 May | 28.2800 | .. |
| 15 May | 28.1600 | .. |
| 16 May | 28.3600 | .. |
| 17 May | 28.4600 | .. |
| 18 May | 29.3900 | .. |
| 21 May | 29.4200 | .. |
| 22 May | 29.3600 | .. |
| 23 May | 29.2400 | .. |
| 24 May | 28.5300 | .. |
| 25 May | 28.4800 | .. |
| 29 May | 29.1700 | .. |
| 30 May | 29.1400 | .. |
| 31 May | 29.3400 | .. |