| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 28 |
0.3%
|
| -8 | Refused | 1 |
0%
|
| -5 | Not Applicable | 14 |
0.1%
|
| -3 | Missing | 716 |
7.6%
|
| 1 | Card | 3691 |
39.4%
|
| 2 | Recall | 4927 |
52.5%
|
| Sysmiss | 227 |