| Day | Rate | Set date |
|---|---|---|
| 1 May | 4.3260 | .. |
| 2 May | 4.0250 | .. |
| 3 May | 4.0410 | .. |
| 6 May | 4.0110 | .. |
| 7 May | 3.9200 | .. |
| 8 May | 3.9780 | .. |
| 9 May | 3.9830 | .. |
| 10 May | 3.9100 | .. |
| 13 May | 3.9250 | .. |
| 14 May | 4.0240 | .. |
| 15 May | 4.0700 | .. |
| 16 May | 3.9320 | .. |
| 17 May | 4.0550 | .. |
| 20 May | 4.0900 | .. |
| 21 May | 4.1920 | .. |
| 22 May | 4.1860 | .. |
| 23 May | 4.2610 | .. |
| 24 May | 4.2370 | .. |
| 27 May | 4.3130 | .. |
| 28 May | 4.1740 | .. |
| 29 May | 4.1480 | .. |
| 30 May | 4.0230 | .. |
| 31 May | 3.9840 | .. |