| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
4.6%
|
| 0 | 59 |
39.1%
|
|
| 15 | 1 |
0.7%
|
|
| 40 | 2 |
1.3%
|
|
| 50 | 2 |
1.3%
|
|
| 75 | 1 |
0.7%
|
|
| NA | 79 |
52.3%
|