| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1994 | 8 |
0.8%
|
|
| 1995 | 79 |
8.3%
|
|
| 1996 | 113 |
11.9%
|
|
| 1997 | 235 |
24.7%
|
|
| 1998 | 457 |
48%
|
|
| 1999 | 57 |
6%
|
|
| 9997 | inconsistent | 4 |
0.4%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 5492 |