| Value | Category | Cases | |
|---|---|---|---|
| 2002 | 727 |
14.4%
|
|
| 2003 | 1588 |
31.5%
|
|
| 2004 | 1577 |
31.3%
|
|
| 2005 | 1036 |
20.6%
|
|
| 2006 | 110 |
2.2%
|
|
| Sysmiss | 33185 |