| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 2005 | 12 |
0.2%
|
|
| 2006 | 320 |
5%
|
|
| 2007 | 674 |
10.4%
|
|
| 2008 | 1440 |
22.3%
|
|
| 2009 | 2156 |
33.4%
|
|
| 2010 | 1856 |
28.7%
|
|
| 9997 | inconsistent | 2 |
0%
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 10627 |