| قيمة | فئة | حالات | |
|---|---|---|---|
| 2007 | 19289 |
20.2%
|
|
| 2008 | 37626 |
39.5%
|
|
| 2009 | 18343 |
19.2%
|
|
| 2010 | 20097 |
21.1%
|
|
| Sysmiss | 1 |