| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | Never | 465 |
43.1%
|
| 1 | Once or twice | 350 |
32.4%
|
| 2 | More often | 264 |
24.5%
|
| 9 | 4 | ||
| Sysmiss | 62 |