| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 2007 | 2 |
0.5%
|
|
| 2008 | 102 |
26.8%
|
|
| 2009 | 128 |
33.6%
|
|
| 2010 | 95 |
24.9%
|
|
| 2011 | 40 |
10.5%
|
|
| 2012 | 12 |
3.1%
|
|
| 9997 | Inconsistent | 2 |
0.5%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 4948 |