| Months | Bias Correction Factor |
| January | 0.94 |
| February | 0.96 |
| March | 0.98 |
| April | 0.94 |
| May | 1.00 |
| June | 1.10 |
| July | 1.17 |
| August | 1.11 |
| September | 1.04 |
| October | 1.00 |
| November | 0.91 |
| December | 0.90 |