| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 1 |
8.3%
|
|
| 2002 | 1 |
8.3%
|
|
| 2003 | 2 |
16.7%
|
|
| 2004 | 2 |
16.7%
|
|
| 2005 | 6 |
50%
|
|
| Sysmiss | 873 |