| Value | Category | Cases | |
|---|---|---|---|
| 2002 | 1 |
11.1%
|
|
| 2004 | 1 |
11.1%
|
|
| 2005 | 1 |
11.1%
|
|
| 2006 | 2 |
22.2%
|
|
| 2007 | 4 |
44.4%
|
|
| 9999 | 1 | ||
| Sysmiss | 4193 |