| Day | Rate | Set date |
|---|---|---|
| 1 May | 26.7500 | .. |
| 2 May | 26.2400 | .. |
| 3 May | 26.6200 | .. |
| 6 May | 26.1200 | .. |
| 7 May | 26.6300 | .. |
| 8 May | 27.8500 | .. |
| 9 May | 27.6800 | .. |
| 10 May | 27.9900 | .. |
| 13 May | 28.3800 | .. |
| 14 May | 29.3600 | .. |
| 15 May | 28.1500 | .. |
| 16 May | 27.9500 | .. |
| 17 May | 28.1800 | .. |
| 20 May | 28.3300 | .. |
| 21 May | 27.3300 | .. |
| 22 May | 26.3700 | .. |
| 23 May | 26.1500 | .. |
| 24 May | 25.8800 | .. |
| 28 May | 25.2700 | .. |
| 29 May | 25.7600 | .. |
| 30 May | 24.6700 | .. |
| 31 May | 25.3100 | .. |