| Value | Category | Cases | |
|---|---|---|---|
| 2003 | 1 |
11.1%
|
|
| 2004 | 5 |
55.6%
|
|
| 2005 | 1 |
11.1%
|
|
| 2006 | 2 |
22.2%
|
|
| Sysmiss | 6302 |