| Value | Category | Cases | |
|---|---|---|---|
| 1999 | 1 |
4.8%
|
|
| 2000 | 1 |
4.8%
|
|
| 2003 | 1 |
4.8%
|
|
| 2004 | 6 |
28.6%
|
|
| 2006 | 5 |
23.8%
|
|
| 2007 | 2 |
9.5%
|
|
| 2008 | 5 |
23.8%
|
|
| Sysmiss | 425 |