| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 2007 | 6 |
0.5%
|
|
| 2008 | 73 |
5.9%
|
|
| 2009 | 125 |
10.1%
|
|
| 2010 | 215 |
17.5%
|
|
| 2011 | 409 |
33.2%
|
|
| 2012 | 402 |
32.6%
|
|
| 9997 | Inconsistent | 2 |
0.2%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 4097 |