| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1999 | 38 |
1.8%
|
|
| 2000 | 168 |
7.7%
|
|
| 2001 | 477 |
22%
|
|
| 2002 | 750 |
34.6%
|
|
| 2003 | 730 |
33.6%
|
|
| 9997 | inconsistent | 7 |
0.3%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 10307 |