| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
2%
|
| 1 | 7 |
4.6%
|
|
| 2 | 6 |
4%
|
|
| 3 | 3 |
2%
|
|
| 4 | 1 |
0.7%
|
|
| 5 | 11 |
7.3%
|
|
| 10 | 2 |
1.3%
|
|
| 20 | 2 |
1.3%
|
|
| NA | 116 |
76.8%
|