| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 20 | 2 |
4.1%
|
|
| 30 | 1 |
2%
|
|
| 50 | 3 |
6.1%
|
|
| 70 | 1 |
2%
|
|
| 100 | 42 |
85.7%
|
|
| Sysmiss | 101 |