| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
19.4%
|
| 0 | None | 20 |
64.5%
|
| 1 | 1 |
3.2%
|
|
| 4 | 1 |
3.2%
|
|
| 10 | 2 |
6.5%
|
|
| 50 | 1 |
3.2%
|
|
| Sysmiss | 83 |