| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1994 | 61 |
3.9%
|
|
| 1995 | 134 |
8.5%
|
|
| 1996 | 268 |
17%
|
|
| 1997 | 484 |
30.6%
|
|
| 1998 | 586 |
37.1%
|
|
| 1999 | 41 |
2.6%
|
|
| 9997 | inconsistent | 6 |
0.4%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 4865 |