| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 2005 | 14 |
0.2%
|
|
| 2006 | 321 |
4.9%
|
|
| 2007 | 674 |
10.3%
|
|
| 2008 | 1461 |
22.2%
|
|
| 2009 | 2181 |
33.2%
|
|
| 2010 | 1918 |
29.2%
|
|
| 9997 | inconsistent | 2 |
0%
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 10516 |