| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1 | Then | 23 |
20.7%
|
| 2 | Later | 70 |
63.1%
|
| 3 | Not at all | 18 |
16.2%
|
| 9 | 15 | ||
| Sysmiss | 1019 |