| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1994 | 53 |
4.1%
|
|
| 1995 | 206 |
15.9%
|
|
| 1996 | 230 |
17.8%
|
|
| 1997 | 328 |
25.4%
|
|
| 1998 | 439 |
34%
|
|
| 1999 | 31 |
2.4%
|
|
| 9997 | inconsistent | 5 |
0.4%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 4661 |