| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1994 | 98 |
20.4%
|
|
| 1995 | 183 |
38.1%
|
|
| 1996 | 111 |
23.1%
|
|
| 1997 | 53 |
11%
|
|
| 1998 | 33 |
6.9%
|
|
| 9997 | inconsistent | 2 |
0.4%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 5965 |