| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | not given | 13 |
13.1%
|
| 2006 | 32 |
32.3%
|
|
| 2007 | 32 |
32.3%
|
|
| 2008 | 17 |
17.2%
|
|
| 2009 | 3 |
3%
|
|
| 4444 | marked on card | 0 |
0%
|
| 6666 | mother reported | 2 |
2%
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | dk | 0 |
0%
|
| 9999 | missing | 0 |
0%
|
| Sysmiss | 16988 |