| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | No | 558 |
94.9%
|
| 1 | Yes, once | 14 |
2.4%
|
| 2 | Yes, more than once | 16 |
2.7%
|
| 9 | 6 | ||
| Sysmiss | 280 |