| Value | Category | Cases | |
|---|---|---|---|
| 2002 | 106 |
21%
|
|
| 2003 | 15 |
3%
|
|
| 2004 | 80 |
15.8%
|
|
| 2005 | 304 |
60.2%
|
|
| Sysmiss | 494 |