| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1994 | 90 |
5.8%
|
|
| 1995 | 261 |
16.7%
|
|
| 1996 | 277 |
17.7%
|
|
| 1997 | 388 |
24.9%
|
|
| 1998 | 485 |
31.1%
|
|
| 1999 | 54 |
3.5%
|
|
| 9997 | inconsistent | 6 |
0.4%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 4392 |