| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 46 |
19.2%
|
| 0 | None | 71 |
29.6%
|
| 1 | 33 |
13.8%
|
|
| 2 | 12 |
5%
|
|
| 3 | 12 |
5%
|
|
| 4 | 1 |
0.4%
|
|
| 5 | 30 |
12.5%
|
|
| 6 | 1 |
0.4%
|
|
| 7 | 1 |
0.4%
|
|
| 8 | 1 |
0.4%
|
|
| 10 | 16 |
6.7%
|
|
| 15 | 7 |
2.9%
|
|
| 20 | 7 |
2.9%
|
|
| 30 | 1 |
0.4%
|
|
| 40 | 1 |
0.4%
|
|
| Sysmiss | 1206 |