| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | Not at all | 40 |
75.5%
|
| 1 | Often | 6 |
11.3%
|
| 2 | Sometimes | 7 |
13.2%
|
| 9 | 3 | ||
| Sysmiss | 818 |