| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 2007 | 3 |
5.2%
|
|
| 2008 | 37 |
63.8%
|
|
| 2009 | 13 |
22.4%
|
|
| 2010 | 5 |
8.6%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 5271 |