| Day | Rate | Set date |
|---|---|---|
| 1 May | 28.9400 | .. |
| 2 May | 27.8000 | .. |
| 3 May | 28.4500 | .. |
| 4 May | 28.3600 | .. |
| 7 May | 27.7700 | .. |
| 8 May | 27.3900 | .. |
| 9 May | 28.2300 | .. |
| 10 May | 28.5200 | .. |
| 11 May | 28.5500 | .. |
| 14 May | 28.7100 | .. |
| 15 May | 28.9800 | .. |
| 16 May | 28.8600 | .. |
| 17 May | 28.9100 | .. |
| 18 May | 29.9100 | .. |
| 21 May | 29.9800 | .. |
| 22 May | 29.7400 | .. |
| 23 May | 29.5800 | .. |
| 24 May | 28.4100 | .. |
| 25 May | 28.3800 | .. |
| 29 May | 28.6600 | .. |
| 30 May | 28.5500 | .. |
| 31 May | 28.3700 | .. |