| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 2005 | 2 |
2.2%
|
|
| 2006 | 62 |
67.4%
|
|
| 2007 | 19 |
20.7%
|
|
| 2008 | 9 |
9.8%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 16995 |