| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 16 |
66.7%
|
|
| 1 | 2 |
8.3%
|
|
| 2 | 3 |
12.5%
|
|
| 3 | 1 |
4.2%
|
|
| 5 | 1 |
4.2%
|
|
| 28 | 1 |
4.2%
|
|
| Sysmiss | 129 |