| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | no card | 1 |
25%
|
| 1 | yes, seen | 2 |
50%
|
| 2 | yes, not seen | 1 |
25%
|
| 3 | no longer has card | 0 |
0%
|
| Sysmiss | 12473 |