| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1994 | 59 |
14.9%
|
|
| 1995 | 137 |
34.7%
|
|
| 1996 | 102 |
25.8%
|
|
| 1997 | 64 |
16.2%
|
|
| 1998 | 26 |
6.6%
|
|
| 1999 | 3 |
0.8%
|
|
| 9997 | inconsistent | 4 |
1%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 6050 |