| Value | Category | Cases | |
|---|---|---|---|
| 1993 | 1 |
20%
|
|
| 2001 | 1 |
20%
|
|
| 2005 | 1 |
20%
|
|
| 2006 | 1 |
20%
|
|
| 2007 | 1 |
20%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | DK | 0 |
0%
|
| Sysmiss | 10365 |