| Value | Category | Cases | |
|---|---|---|---|
| 1999 | 1 |
4.8%
|
|
| 2003 | 2 |
9.5%
|
|
| 2004 | 5 |
23.8%
|
|
| 2005 | 7 |
33.3%
|
|
| 2006 | 5 |
23.8%
|
|
| 2007 | 1 |
4.8%
|
|
| Sysmiss | 1162 |