| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | None | 148 |
89.2%
|
| 1 | 8 |
4.8%
|
|
| 2 | 8 |
4.8%
|
|
| 3 | 1 |
0.6%
|
|
| 20 | 1 |
0.6%
|
|
| Sysmiss | 1134 |