| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1994 | 14 |
37.8%
|
|
| 1995 | 18 |
48.6%
|
|
| 1996 | 4 |
10.8%
|
|
| 1998 | 1 |
2.7%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 6408 |