| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 15 |
18.5%
|
| 0 | 4 |
4.9%
|
|
| 1 | 25 |
30.9%
|
|
| 2 | 12 |
14.8%
|
|
| 3 | 10 |
12.3%
|
|
| 4 | 7 |
8.6%
|
|
| 5 | 3 |
3.7%
|
|
| 6 | 2 |
2.5%
|
|
| 8 | 1 |
1.2%
|
|
| 50 | 1 |
1.2%
|
|
| 60 | 1 |
1.2%
|
|
| Sysmiss | 30 |