| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 3 |
1.3%
|
|
| 10 | 1 |
0.4%
|
|
| 20 | 1 |
0.4%
|
|
| 30 | 1 |
0.4%
|
|
| 95 | 1 |
0.4%
|
|
| 100 | 226 |
97%
|
|
| Sysmiss | 127 |