| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | No | 7 |
70%
|
| 1 | Currently attending | 0 |
0%
|
| 2 | Attended at some time | 2 |
20%
|
| 9 | 1 |
10%
|
|
| Sysmiss | 14414 |