| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 2008 | 57 |
4.9%
|
|
| 2009 | 209 |
17.9%
|
|
| 2010 | 247 |
21.2%
|
|
| 2011 | 312 |
26.7%
|
|
| 2012 | 341 |
29.2%
|
|
| 9997 | Inconsistent | 1 |
0.1%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 1982 |