| Value | Category | Cases | |
|---|---|---|---|
| 2004 | 258 |
72.5%
|
|
| 2005 | 59 |
16.6%
|
|
| 2006 | 22 |
6.2%
|
|
| 2007 | 5 |
1.4%
|
|
| 2008 | 4 |
1.1%
|
|
| 2009 | 8 |
2.2%
|
|
| Sysmiss | 1275 |