| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 74 |
100%
|
| -7 | Does not apply | 0 | |
| 1 | Less than one week | 0 | |
| 2 | 0 | ||
| 3 | 0 | ||
| 4 | 0 | ||
| 5 | 0 | ||
| 6 | 0 | ||
| 7 | 0 |