| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
4.4%
|
| 0 | None | 24 |
53.3%
|
| 1 | 3 |
6.7%
|
|
| 2 | 1 |
2.2%
|
|
| 5 | 4 |
8.9%
|
|
| 6 | 2 |
4.4%
|
|
| 8 | 1 |
2.2%
|
|
| 10 | 2 |
4.4%
|
|
| 15 | 1 |
2.2%
|
|
| 20 | 4 |
8.9%
|
|
| 40 | 1 |
2.2%
|
|
| Sysmiss | 105 |