| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1994 | 10 |
31.3%
|
|
| 1995 | 17 |
53.1%
|
|
| 1996 | 5 |
15.6%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 6413 |