| Day | Rate | Set date |
|---|---|---|
| 1 May | 73.8900 | .. |
| 2 May | 74.6400 | .. |
| 3 May | 72.6500 | .. |
| 4 May | 70.2900 | .. |
| 5 May | 70.9500 | .. |
| 8 May | 70.2100 | .. |
| 9 May | 71.0800 | .. |
| 10 May | 72.4400 | .. |
| 11 May | 73.4300 | .. |
| 12 May | 72.3200 | .. |
| 15 May | 69.6700 | .. |
| 16 May | 70.3400 | .. |
| 17 May | 69.0400 | .. |
| 18 May | 69.6700 | .. |
| 19 May | 68.6800 | .. |
| 22 May | 69.3500 | .. |
| 23 May | 71.0000 | .. |
| 24 May | 69.2200 | .. |
| 25 May | 70.7100 | .. |
| 26 May | 70.5900 | .. |
| 30 May | 71.0500 | .. |
| 31 May | 70.4100 | .. |