| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | Never | 83 |
2.2%
|
| 1 | Frequently | 1859 |
49.9%
|
| 2 | Some times | 1780 |
47.7%
|
| 9 | 6 |
0.2%
|
|
| Sysmiss | 1360 |