| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| -7 | Does not apply (sponatneous) | 15 |
1.5%
|
| 1 | Yes | 375 |
36.6%
|
| 2 | No | 634 |
61.9%
|