| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | Never | 193 |
5.2%
|
| 1 | Frequently | 1101 |
29.5%
|
| 2 | Some times | 2429 |
65.2%
|
| 9 | 5 |
0.1%
|
|
| Sysmiss | 1360 |