| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1994 | 11 |
2.4%
|
|
| 1995 | 146 |
31.2%
|
|
| 1996 | 146 |
31.2%
|
|
| 1997 | 94 |
20.1%
|
|
| 1998 | 61 |
13%
|
|
| 1999 | 9 |
1.9%
|
|
| 9997 | inconsistent | 1 |
0.2%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 5977 |