| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 2008 | 85 |
23.1%
|
|
| 2009 | 134 |
36.4%
|
|
| 2010 | 94 |
25.5%
|
|
| 2011 | 45 |
12.2%
|
|
| 2012 | 9 |
2.4%
|
|
| 9997 | Inconsistent | 1 |
0.3%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 4961 |