|
Month
|
2011
|
2010
|
2009
|
| January | 2.04 | 2.05 | 2.05 |
| February | 2.04 | 2.05 | 2.05 |
| March | 1.98 | 2.05 | 2.05 |
| April | 1.98 | 2.05 | 2.05 |
| May | 1.98 | 2.05 | 2.05 |
| June | 1.98 | 2.05 | 2.05 |
| July | 2.05 | 2.05 | |
| August | 1.98 | 2.05 | 2.05 |
| September | 2.05 | 2.05 | |
| October | 2.04 | 2.05 | |
| November | 2.05 | 2.05 | |
| December | 2.05 | 2.05 |