| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 0 |
0%
|
| -7 | Does not apply | 0 |
0%
|
| 1 | Less than one day | 1 |
50%
|
| 7 | 1 |
50%
|
|
| Sysmiss | 2 |