| Value | Category | Cases | |
|---|---|---|---|
| 1993 | 1 |
14.3%
|
|
| 1996 | 1 |
14.3%
|
|
| 1997 | 1 |
14.3%
|
|
| 2001 | 1 |
14.3%
|
|
| 2003 | 3 |
42.9%
|
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 42005 |