| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 36 |
100%
|
| -7 | Does not apply | 0 | |
| 1 | One day or less | 0 | |
| 2 | 0 | ||
| 3 | 0 | ||
| 4 | 0 | ||
| 5 | 0 | ||
| 6 | 0 | ||
| 7 | 0 | ||
| 8 | 0 | ||
| 10 | 0 | ||
| 15 | 0 | ||
| 21 | 0 | ||
| 24 | 0 | ||
| 30 | 0 | ||
| 35 | 0 | ||
| 48 | 0 | ||
| 60 | 0 | ||
| 72 | 0 | ||
| 144 | 0 | ||
| 168 | 0 |