| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1994 | 57 |
3.9%
|
|
| 1995 | 124 |
8.5%
|
|
| 1996 | 255 |
17.4%
|
|
| 1997 | 450 |
30.7%
|
|
| 1998 | 529 |
36.1%
|
|
| 1999 | 30 |
2%
|
|
| 9997 | inconsistent | 22 |
1.5%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 4978 |