| Value | Category | Cases | |
|---|---|---|---|
| 1 | Plutôt difficile | 441 |
29.1%
|
| 2 | Plutôt facile | 929 |
61.4%
|
| 3 | nsp | 129 |
8.5%
|
| 9 | nr | 14 |
0.9%
|