| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
13.2%
|
| 0 | None | 37 |
69.8%
|
| 1 | 4 |
7.5%
|
|
| 2 | 1 |
1.9%
|
|
| 10 | 3 |
5.7%
|
|
| 23 | 1 |
1.9%
|
|
| Sysmiss | 104 |