| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 2007 | 1 |
1.8%
|
|
| 2008 | 33 |
60%
|
|
| 2009 | 14 |
25.5%
|
|
| 2010 | 6 |
10.9%
|
|
| 9997 | Inconsistent | 1 |
1.8%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 5274 |