| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 2005 | 10 |
10.5%
|
|
| 2006 | 59 |
62.1%
|
|
| 2007 | 19 |
20%
|
|
| 2008 | 7 |
7.4%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 16992 |