| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1994 | 56 |
4.5%
|
|
| 1995 | 204 |
16.2%
|
|
| 1996 | 221 |
17.6%
|
|
| 1997 | 316 |
25.2%
|
|
| 1998 | 430 |
34.2%
|
|
| 1999 | 24 |
1.9%
|
|
| 9997 | inconsistent | 5 |
0.4%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 4697 |