| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 2008 | 74 |
19.5%
|
|
| 2009 | 138 |
36.4%
|
|
| 2010 | 96 |
25.3%
|
|
| 2011 | 54 |
14.2%
|
|
| 2012 | 16 |
4.2%
|
|
| 9997 | Inconsistent | 1 |
0.3%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 4950 |