| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1994 | 3 |
7.1%
|
|
| 1995 | 23 |
54.8%
|
|
| 1996 | 10 |
23.8%
|
|
| 1997 | 2 |
4.8%
|
|
| 1998 | 4 |
9.5%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 6403 |