| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 2008 | 65 |
5.7%
|
|
| 2009 | 108 |
9.4%
|
|
| 2010 | 188 |
16.4%
|
|
| 2011 | 381 |
33.2%
|
|
| 2012 | 403 |
35.1%
|
|
| 9997 | Inconsistent | 4 |
0.3%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 4180 |