| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 26 |
21.3%
|
| 0 | 22 |
18%
|
|
| 1 | 16 |
13.1%
|
|
| 2 | 10 |
8.2%
|
|
| 5 | 8 |
6.6%
|
|
| 7 | 1 |
0.8%
|
|
| 10 | 8 |
6.6%
|
|
| 15 | 5 |
4.1%
|
|
| 20 | 9 |
7.4%
|
|
| 25 | 1 |
0.8%
|
|
| 30 | 9 |
7.4%
|
|
| 33 | 1 |
0.8%
|
|
| 50 | 2 |
1.6%
|
|
| 60 | 1 |
0.8%
|
|
| 90 | 1 |
0.8%
|
|
| 100 | 2 |
1.6%
|
|
| Sysmiss | 964 |