|
Month
|
2011
|
2010
|
2009
|
| January | 2.89 | 3.99 | 3.99 |
| February | 3.99 | 3.99 | 3.99 |
| March | 2.31 | 3.99 | 3.99 |
| April | 2.89 | 3.99 | 3.99 |
| May | 3.99 | 3.99 | 3.99 |
| June | 2.89 | 3.99 | 3.99 |
| July | 3.19 | 3.99 | |
| August | 3.05 | 3.19 | 3.99 |
| September | 3.19 | 3.99 | |
| October | 2.89 | 3.99 | |
| November | 2.89 | 3.99 | |
| December | 2.89 | 3.99 |