| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 2007 | 7 |
1.7%
|
|
| 2008 | 124 |
30.8%
|
|
| 2009 | 137 |
34%
|
|
| 2010 | 98 |
24.3%
|
|
| 2011 | 29 |
7.2%
|
|
| 2012 | 8 |
2%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 4926 |