| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 40 |
33.9%
|
| 0 | 16 |
13.6%
|
|
| 1 | 24 |
20.3%
|
|
| 2 | 11 |
9.3%
|
|
| 3 | 4 |
3.4%
|
|
| 4 | 1 |
0.8%
|
|
| 5 | 8 |
6.8%
|
|
| 8 | 1 |
0.8%
|
|
| 10 | 3 |
2.5%
|
|
| 11 | 1 |
0.8%
|
|
| 15 | 3 |
2.5%
|
|
| 20 | 1 |
0.8%
|
|
| 23 | 1 |
0.8%
|
|
| 30 | 2 |
1.7%
|
|
| 55 | 1 |
0.8%
|
|
| 60 | 1 |
0.8%
|
|
| Sysmiss | 2071 |