| Day | Rate | Set date |
|---|---|---|
| 1 May | 20.8500 | .. |
| 4 May | 21.1200 | .. |
| 5 May | 20.8000 | .. |
| 6 May | 20.7700 | .. |
| 7 May | 20.7100 | .. |
| 8 May | 20.8600 | .. |
| 11 May | 21.0000 | .. |
| 12 May | 20.9600 | .. |
| 13 May | 20.7600 | .. |
| 14 May | 20.5500 | .. |
| 15 May | 20.6900 | .. |
| 18 May | 20.5200 | .. |
| 19 May | 20.1200 | .. |
| 20 May | 20.4000 | .. |
| 21 May | 20.9000 | .. |
| 22 May | 20.9400 | .. |
| 26 May | 22.0000 | .. |
| 27 May | 21.9200 | .. |
| 28 May | 21.9500 | .. |
| 29 May | 22.1100 | .. |