| Value | Category | Cases | |
|---|---|---|---|
| 2003 | 2 |
18.2%
|
|
| 2004 | 2 |
18.2%
|
|
| 2005 | 1 |
9.1%
|
|
| 2006 | 5 |
45.5%
|
|
| 2007 | 1 |
9.1%
|
|
| 9999 | 1 | ||
| Sysmiss | 4191 |