| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 2005 | 31 |
0.4%
|
|
| 2006 | 375 |
5.4%
|
|
| 2007 | 732 |
10.5%
|
|
| 2008 | 1603 |
23.1%
|
|
| 2009 | 2276 |
32.8%
|
|
| 2010 | 1928 |
27.8%
|
|
| 9997 | inconsistent | 2 |
0%
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 10140 |