| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1994 | 16 |
1.7%
|
|
| 1995 | 79 |
8.5%
|
|
| 1996 | 134 |
14.4%
|
|
| 1997 | 266 |
28.7%
|
|
| 1998 | 403 |
43.4%
|
|
| 1999 | 28 |
3%
|
|
| 9997 | inconsistent | 2 |
0.2%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 5517 |