| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| -4 | Too many to count | 29 |
80.6%
|
| 0 | 1 |
2.8%
|
|
| 3 | 1 |
2.8%
|
|
| 4 | 1 |
2.8%
|
|
| 5 | 1 |
2.8%
|
|
| 8 | 1 |
2.8%
|
|
| 10 | 1 |
2.8%
|
|
| 50 | 1 |
2.8%
|
|
| Sysmiss | 214 |