| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | no | 1867 |
29%
|
| 1 | yes, spontaneously | 1160 |
18%
|
| 2 | yes, probed | 3418 |
53%
|
| 8 | not asked | 0 |
0%
|