| Value | Category | Cases | |
|---|---|---|---|
| -99 | Inconsistent | 5 |
6.4%
|
| -9 | Missing | 2 |
2.6%
|
| 0 | incorrect | 3 |
3.8%
|
| 1 | correct | 68 |
87.2%
|
| Sysmiss | 2909 |