| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 5 |
7.5%
|
| 20 | 3 |
4.5%
|
|
| 30 | 1 |
1.5%
|
|
| 40 | 3 |
4.5%
|
|
| 50 | 1 |
1.5%
|
|
| 60 | 2 |
3%
|
|
| 70 | 2 |
3%
|
|
| 85 | 1 |
1.5%
|
|
| 95 | 1 |
1.5%
|
|
| 100 | 48 |
71.6%
|
|
| Sysmiss | 84 |