| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1998 | 16 |
2%
|
|
| 1999 | 249 |
31.4%
|
|
| 2000 | 325 |
40.9%
|
|
| 2001 | 137 |
17.3%
|
|
| 2002 | 28 |
3.5%
|
|
| 2003 | 18 |
2.3%
|
|
| 9997 | inconsistent | 21 |
2.6%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 11683 |