| Value | Category | Cases | |
|---|---|---|---|
| 2005 | 2 |
16.7%
|
|
| 2006 | 1 |
8.3%
|
|
| 2007 | 2 |
16.7%
|
|
| 2008 | 5 |
41.7%
|
|
| 2009 | 2 |
16.7%
|
|
| Sysmiss | 296 |