| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 2007 | 6 |
0.5%
|
|
| 2008 | 70 |
5.8%
|
|
| 2009 | 123 |
10.1%
|
|
| 2010 | 209 |
17.2%
|
|
| 2011 | 408 |
33.6%
|
|
| 2012 | 398 |
32.7%
|
|
| 9997 | Inconsistent | 2 |
0.2%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 4113 |