| Value | Category | Cases | |
|---|---|---|---|
| -99 | No response | 49 |
1.6%
|
| -88 | Doesn | 8 |
0.3%
|
| 0 | Incorrect | 972 |
32.4%
|
| 1 | Correct | 1971 |
65.7%
|
| Sysmiss | 867 |