|
Month
|
2011
|
2010
|
2009
|
| January | 2.00 | 2.39 | 2.29 |
| February | 2.00 | 2.39 | 2.29 |
| March | 2.79 | 2.50 | 2.29 |
| April | 2.79 | 2.50 | 2.29 |
| May | 2.79 | 2.50 | 2.29 |
| June | 2.09 | 2.50 | 2.39 |
| July | 2.50 | 2.39 | |
| August | 2.89 | 2.50 | 2.39 |
| September | 2.50 | 2.39 | |
| October | 2.00 | 2.39 | |
| November | 2.00 | 2.39 | |
| December | 2.00 | 2.39 |