| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1994 | 21 |
1.9%
|
|
| 1995 | 106 |
9.4%
|
|
| 1996 | 170 |
15%
|
|
| 1997 | 324 |
28.6%
|
|
| 1998 | 459 |
40.5%
|
|
| 1999 | 51 |
4.5%
|
|
| 9997 | inconsistent | 2 |
0.2%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 5312 |