| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1999 | 94 |
3.7%
|
|
| 2000 | 253 |
9.8%
|
|
| 2001 | 510 |
19.8%
|
|
| 2002 | 900 |
35%
|
|
| 2003 | 802 |
31.2%
|
|
| 9997 | inconsistent | 13 |
0.5%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 9905 |