| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
3.3%
|
| 0 | None | 40 |
65.6%
|
| 1 | 2 |
3.3%
|
|
| 2 | 3 |
4.9%
|
|
| 4 | 1 |
1.6%
|
|
| 5 | 3 |
4.9%
|
|
| 8 | 2 |
3.3%
|
|
| 10 | 3 |
4.9%
|
|
| 15 | 2 |
3.3%
|
|
| 25 | 1 |
1.6%
|
|
| 30 | 1 |
1.6%
|
|
| 35 | 1 |
1.6%
|
|
| Sysmiss | 50 |