| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | None | 42 |
68.9%
|
| 1 | 11 |
18%
|
|
| 2 | 1 |
1.6%
|
|
| 3 | 1 |
1.6%
|
|
| 5 | 2 |
3.3%
|
|
| 10 | 1 |
1.6%
|
|
| 15 | 2 |
3.3%
|
|
| 20 | 1 |
1.6%
|
|
| Sysmiss | 112 |