| Day | Rate | Set date |
|---|---|---|
| 3 May | 20.5700 | .. |
| 4 May | 20.3900 | .. |
| 5 May | 20.4600 | .. |
| 6 May | 20.4700 | .. |
| 7 May | 20.4400 | .. |
| 10 May | 20.4400 | .. |
| 11 May | 20.3400 | .. |
| 12 May | 20.2000 | .. |
| 13 May | 19.7800 | .. |
| 14 May | 19.4800 | .. |
| 17 May | 19.5100 | .. |
| 18 May | 19.3400 | .. |
| 19 May | 19.1500 | .. |
| 20 May | 19.5400 | .. |
| 21 May | 19.8800 | .. |
| 24 May | 19.7200 | .. |
| 25 May | 19.9000 | .. |
| 26 May | 19.8900 | .. |
| 27 May | 20.0600 | .. |
| 28 May | 20.0200 | .. |