| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1994 | 6 |
19.4%
|
|
| 1995 | 18 |
58.1%
|
|
| 1996 | 3 |
9.7%
|
|
| 1997 | 1 |
3.2%
|
|
| 1998 | 3 |
9.7%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 6414 |