| January |
| February |
| March |
| April |
| May |
| June |
| July |
| August |
| September |
| October |
| November |
| December |
|
| 35.71 |
| 68.42 |
| 72.22 |
| 58.33 |
| 75.00 |
| 77.78 |
| 68.75 |
| 78.57 |
| 87.50 |
| 48.00 |
| 85.71 |
| 83.33 |
|
| 57.14 |
| 46.15 |
| 66.67 |
| 36.36 |
| 53.33 |
| 75.00 |
| 53.85 |
| 88.89 |
| 70.00 |
| 66.67 |
| 45.45 |
| . |
|
| 21.43 |
| -22.27 |
| -5.55 |
| -21.97 |
| -21.67 |
| -2.78 |
| -14.9 |
| 10.32 |
| -17.5 |
| 23.81 |
| -40.26 |
| . |
|
| January pass rate rises significantly |
| February pass rate falls significantly |
| . |
| April pass rate falls significantly |
| May pass rate falls significantly |
| . |
| July pass rate falls |
| August pass rate rises |
| September pass rate falls |
| October pass rate rises significantly |
| November pass rate falls significantly |
| . |
|