| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1998 | 3 |
7.5%
|
|
| 1999 | 21 |
52.5%
|
|
| 2000 | 13 |
32.5%
|
|
| 2001 | 2 |
5%
|
|
| 9997 | inconsistent | 1 |
2.5%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 12437 |