| Value | Category | Cases | |
|---|---|---|---|
| 1992 | 1 |
4.5%
|
|
| 1994 | 2 |
9.1%
|
|
| 1998 | 2 |
9.1%
|
|
| 2000 | 3 |
13.6%
|
|
| 2001 | 2 |
9.1%
|
|
| 2004 | 2 |
9.1%
|
|
| 2005 | 7 |
31.8%
|
|
| 2006 | 2 |
9.1%
|
|
| 2007 | 1 |
4.5%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | DK | 0 |
0%
|
| Sysmiss | 10348 |