| Day | Rate | Set date |
|---|---|---|
| 4 May | 16.9300 | .. |
| 5 May | 17.0500 | .. |
| 6 May | 16.5600 | .. |
| 7 May | 16.4100 | .. |
| 10 May | 16.4500 | .. |
| 11 May | 15.9600 | .. |
| 12 May | 15.6000 | .. |
| 13 May | 16.1000 | .. |
| 14 May | 16.2100 | .. |
| 17 May | 15.8100 | .. |
| 18 May | 15.1400 | .. |
| 19 May | 15.0200 | .. |
| 20 May | 15.2300 | .. |
| 21 May | 15.5800 | .. |
| 24 May | 15.2800 | .. |
| 25 May | 15.4300 | .. |
| 26 May | 15.4700 | .. |
| 27 May | 15.3600 | .. |
| 28 May | 15.2000 | .. |