| Day | Rate | Set date |
|---|---|---|
| 3 May | 15.5400 | .. |
| 4 May | 15.4800 | .. |
| 5 May | 15.8000 | .. |
| 6 May | 16.2800 | .. |
| 9 May | 16.2200 | .. |
| 10 May | 16.0200 | .. |
| 11 May | 16.0900 | .. |
| 12 May | 16.4400 | .. |
| 13 May | 16.5900 | .. |
| 16 May | 16.3600 | .. |
| 17 May | 15.8200 | .. |
| 18 May | 16.0900 | .. |
| 19 May | 16.3400 | .. |
| 20 May | 16.5500 | .. |
| 23 May | 16.4100 | .. |
| 24 May | 16.3200 | .. |
| 25 May | 16.1200 | .. |
| 26 May | 16.1200 | .. |
| 27 May | 16.3900 | .. |
| 31 May | 16.4500 | .. |