| Value | Category | Cases | |
|---|---|---|---|
| 2002 | 4 |
6.3%
|
|
| 2003 | 14 |
21.9%
|
|
| 2004 | 14 |
21.9%
|
|
| 2005 | 26 |
40.6%
|
|
| 2006 | 6 |
9.4%
|
|
| 9998 | DK | 0 |
0%
|
| 9999 | Missing | 0 |
0%
|
| Sysmiss | 128 |