| Day | Rate | Set date |
|---|---|---|
| 1 May | 264.5000 | 29.04.2011 |
| 2 May | 264.0500 | 02.05.2011 |
| 3 May | 265.5300 | 03.05.2011 |
| 4 May | 264.6800 | 04.05.2011 |
| 5 May | 265.2600 | 05.05.2011 |
| 6 May | 264.9500 | 06.05.2011 |
| 7 May | 264.9500 | 06.05.2011 |
| 8 May | 264.9500 | 06.05.2011 |
| 9 May | 264.4000 | 09.05.2011 |
| 10 May | 263.8500 | 10.05.2011 |
| 11 May | 263.6700 | 11.05.2011 |
| 12 May | 266.0800 | 12.05.2011 |
| 13 May | 267.0500 | 13.05.2011 |
| 14 May | 267.0500 | 13.05.2011 |
| 15 May | 267.0500 | 13.05.2011 |
| 16 May | 267.9300 | 16.05.2011 |
| 17 May | 267.6900 | 17.05.2011 |
| 18 May | 269.0300 | 18.05.2011 |
| 19 May | 267.9700 | 19.05.2011 |
| 20 May | 268.8000 | 20.05.2011 |
| 21 May | 268.8000 | 20.05.2011 |
| 22 May | 268.8000 | 20.05.2011 |
| 23 May | 270.1600 | 23.05.2011 |
| 24 May | 269.4000 | 24.05.2011 |
| 25 May | 270.0600 | 25.05.2011 |
| 26 May | 269.0200 | 26.05.2011 |
| 27 May | 268.5800 | 27.05.2011 |
| 28 May | 268.5800 | 27.05.2011 |
| 29 May | 268.5800 | 27.05.2011 |
| 30 May | 268.0700 | 30.05.2011 |
| 31 May | 266.8500 | 31.05.2011 |