| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 2008 | 58 |
5.4%
|
|
| 2009 | 99 |
9.3%
|
|
| 2010 | 174 |
16.3%
|
|
| 2011 | 350 |
32.7%
|
|
| 2012 | 388 |
36.3%
|
|
| 9997 | Inconsistent | 1 |
0.1%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 4259 |