| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1994 | 31 |
9.4%
|
|
| 1995 | 109 |
32.9%
|
|
| 1996 | 92 |
27.8%
|
|
| 1997 | 60 |
18.1%
|
|
| 1998 | 33 |
10%
|
|
| 1999 | 3 |
0.9%
|
|
| 9997 | inconsistent | 3 |
0.9%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 6114 |