| Day | Rate | Set date |
|---|---|---|
| 1 May | 30.2900 | .. |
| 2 May | 30.1700 | .. |
| 3 May | 30.1600 | .. |
| 4 May | 30.2500 | .. |
| 7 May | 30.1600 | .. |
| 8 May | 30.2200 | .. |
| 9 May | 30.3400 | .. |
| 10 May | 30.3400 | .. |
| 11 May | 30.3600 | .. |
| 14 May | 30.5900 | .. |
| 15 May | 30.6000 | .. |
| 16 May | 30.9800 | .. |
| 17 May | 30.7300 | .. |
| 18 May | 30.7500 | .. |
| 21 May | 30.9300 | .. |
| 22 May | 30.6700 | .. |
| 23 May | 30.6000 | .. |
| 24 May | 30.7500 | .. |
| 25 May | 30.8800 | .. |
| 29 May | 30.7100 | .. |
| 30 May | 30.8100 | .. |
| 31 May | 30.8300 | .. |