| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1 | Then | 4191 |
85.8%
|
| 2 | Later | 481 |
9.8%
|
| 3 | Not at all | 172 |
3.5%
|
| 9 | 40 |
0.8%
|
|
| Sysmiss | 51294 |