| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 2007 | 1 |
0.1%
|
|
| 2008 | 70 |
5.8%
|
|
| 2009 | 111 |
9.2%
|
|
| 2010 | 200 |
16.6%
|
|
| 2011 | 399 |
33.2%
|
|
| 2012 | 418 |
34.8%
|
|
| 9997 | Inconsistent | 3 |
0.2%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 4127 |