| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1 | Then | 15 |
34.1%
|
| 2 | Later | 19 |
43.2%
|
| 3 | Not at all | 10 |
22.7%
|
| 9 | 3 | ||
| Sysmiss | 284 |