| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Très facile | 14 |
1.2%
|
| 2 | Facile | 116 |
9.7%
|
| 3 | Difficile | 452 |
37.7%
|
| 4 | Très difficile | 315 |
26.3%
|
| 8 | REFUS | 0 |
0%
|
| 9 | Ne sait pas | 303 |
25.3%
|