| Month | Effective (n) | Percentage |
| January | 11 | 10.4 |
| February | 8 | 7.5 |
| March | 14 | 13 .2 |
| April | 5 | 4.7 |
| May | 12 | 11.3 |
| June | 8 | 7.5 |
| July | 9 | 8.5 |
| August | 4 | 3.8 |
| September | 5 | 4.7 |
| October | 15 | 14.1 |
| November | 5 | 4.7 |
| December | 10 | 9.4 |
| Total | 106 | 100 |