| Day | Rate | Set date |
|---|---|---|
| 2 May | 17.1600 | .. |
| 3 May | 16.8900 | .. |
| 4 May | 16.8600 | .. |
| 5 May | 17.2900 | .. |
| 6 May | 17.7000 | .. |
| 9 May | 17.7300 | .. |
| 10 May | 17.6100 | .. |
| 11 May | 17.8500 | .. |
| 12 May | 18.2800 | .. |
| 13 May | 18.2100 | .. |
| 16 May | 18.0600 | .. |
| 17 May | 17.5900 | .. |
| 18 May | 17.9900 | .. |
| 19 May | 18.4500 | .. |
| 20 May | 18.9200 | .. |
| 23 May | 18.0600 | .. |
| 24 May | 17.9200 | .. |
| 25 May | 17.7000 | .. |
| 26 May | 17.7400 | .. |
| 27 May | 18.0300 | .. |
| 31 May | 18.3100 | .. |