| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 1 |
8.3%
|
|
| 2004 | 1 |
8.3%
|
|
| 2005 | 2 |
16.7%
|
|
| 2006 | 1 |
8.3%
|
|
| 2008 | 4 |
33.3%
|
|
| 2009 | 3 |
25%
|
|
| Sysmiss | 264 |