| Day | Rate | Set date |
|---|---|---|
| 1 May | 73.7000 | .. |
| 2 May | 74.6100 | .. |
| 3 May | 72.2800 | .. |
| 4 May | 69.9400 | .. |
| 5 May | 70.1900 | .. |
| 8 May | 69.7700 | .. |
| 9 May | 70.6900 | .. |
| 10 May | 72.1300 | .. |
| 11 May | 73.3200 | .. |
| 12 May | 72.0400 | .. |
| 15 May | 69.4100 | .. |
| 16 May | 69.5300 | .. |
| 17 May | 68.6900 | .. |
| 18 May | 69.4500 | .. |
| 19 May | 68.5300 | .. |
| 22 May | 69.2300 | .. |
| 23 May | 71.7600 | .. |
| 24 May | 69.8600 | .. |
| 25 May | 71.3200 | .. |
| 26 May | 71.3700 | .. |
| 30 May | 72.0300 | .. |
| 31 May | 71.2900 | .. |