| Value | Category | Cases | |
|---|---|---|---|
| 1996 | 1 |
7.1%
|
|
| 1998 | 1 |
7.1%
|
|
| 1999 | 2 |
14.3%
|
|
| 2000 | 1 |
7.1%
|
|
| 2002 | 1 |
7.1%
|
|
| 2003 | 2 |
14.3%
|
|
| 2004 | 2 |
14.3%
|
|
| 2006 | 4 |
28.6%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | DK | 0 |
0%
|
| Sysmiss | 10356 |