| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 2007 | 1 |
2.6%
|
|
| 2008 | 6 |
15.8%
|
|
| 2009 | 5 |
13.2%
|
|
| 2010 | 6 |
15.8%
|
|
| 2011 | 7 |
18.4%
|
|
| 2012 | 13 |
34.2%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 4444 |