| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 2008 | 18 |
9%
|
|
| 2009 | 14 |
7%
|
|
| 2010 | 29 |
14.4%
|
|
| 2011 | 50 |
24.9%
|
|
| 2012 | 90 |
44.8%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 4281 |