| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.8%
|
| -7 | Does not apply (spontaneous) | 17 |
14.2%
|
| 0 | 44 |
36.7%
|
|
| 15 | 1 |
0.8%
|
|
| 20 | 1 |
0.8%
|
|
| 50 | 1 |
0.8%
|
|
| 60 | 1 |
0.8%
|
|
| 75 | 1 |
0.8%
|
|
| 80 | 2 |
1.7%
|
|
| 100 | 51 |
42.5%
|