| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 2008 | 15 |
2.5%
|
|
| 2009 | 53 |
8.8%
|
|
| 2010 | 86 |
14.3%
|
|
| 2011 | 152 |
25.2%
|
|
| 2012 | 296 |
49.2%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 4727 |