| Day | Rate | Set date |
|---|---|---|
| 1 May | 25.8700 | .. |
| 2 May | 26.8900 | .. |
| 3 May | 26.7500 | .. |
| 4 May | 26.9800 | .. |
| 5 May | 27.2900 | .. |
| 8 May | 28.0900 | .. |
| 9 May | 28.6500 | .. |
| 10 May | 28.1000 | .. |
| 11 May | 29.1100 | .. |
| 12 May | 29.6200 | .. |
| 15 May | 29.9200 | .. |
| 16 May | 29.7300 | .. |
| 17 May | 29.3200 | .. |
| 18 May | 30.3300 | .. |
| 19 May | 29.8900 | .. |
| 22 May | 28.6100 | .. |
| 23 May | 28.7800 | .. |
| 24 May | 29.9300 | .. |
| 25 May | 30.5100 | .. |
| 26 May | 30.0000 | .. |
| 30 May | 30.3500 | .. |
| 31 May | 29.0100 | .. |