| Value | Category | Cases | |
|---|---|---|---|
| 2002 | 1 |
12.5%
|
|
| 2003 | 1 |
12.5%
|
|
| 2005 | 2 |
25%
|
|
| 2006 | 4 |
50%
|
|
| Sysmiss | 4195 |