| Day | Rate | Set date |
|---|---|---|
| 1 May | 15.1300 | .. |
| 5 May | 14.6400 | .. |
| 6 May | 14.4900 | .. |
| 7 May | 14.4700 | .. |
| 8 May | 14.6900 | .. |
| 11 May | 14.8400 | .. |
| 12 May | 15.1100 | .. |
| 13 May | 14.6800 | .. |
| 14 May | 14.6800 | .. |
| 15 May | 14.4000 | .. |
| 18 May | 14.4600 | .. |
| 19 May | 14.3800 | .. |
| 20 May | 13.7200 | .. |
| 21 May | 13.9800 | .. |
| 22 May | 14.0600 | .. |
| 26 May | 14.1400 | .. |
| 27 May | 14.2300 | .. |
| 28 May | 14.1300 | .. |
| 29 May | 14.3700 | .. |