| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1994 | 128 |
26.8%
|
|
| 1995 | 187 |
39.1%
|
|
| 1996 | 95 |
19.9%
|
|
| 1997 | 39 |
8.2%
|
|
| 1998 | 26 |
5.4%
|
|
| 9997 | inconsistent | 3 |
0.6%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 5967 |