| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1994 | 191 |
9.8%
|
|
| 1995 | 308 |
15.8%
|
|
| 1996 | 345 |
17.7%
|
|
| 1997 | 484 |
24.9%
|
|
| 1998 | 550 |
28.3%
|
|
| 1999 | 31 |
1.6%
|
|
| 9997 | inconsistent | 36 |
1.9%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 4008 |