| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 1 |
6.7%
|
|
| 2002 | 1 |
6.7%
|
|
| 2003 | 6 |
40%
|
|
| 2004 | 1 |
6.7%
|
|
| 2005 | 6 |
40%
|
|
| Sysmiss | 8119 |