| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | Never | 171 |
45%
|
| 1 | Once or twice | 84 |
22.1%
|
| 2 | More often | 125 |
32.9%
|
| 9 | 8 | ||
| Sysmiss | 407 |