| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
6.1%
|
| -7 | Does not apply (spontaneous) | 26 |
26.5%
|
| 0 | 4 |
4.1%
|
|
| 10 | 1 |
1%
|
|
| 20 | 3 |
3.1%
|
|
| 30 | 2 |
2%
|
|
| 45 | 1 |
1%
|
|
| 55 | 1 |
1%
|
|
| 70 | 4 |
4.1%
|
|
| 80 | 4 |
4.1%
|
|
| 85 | 1 |
1%
|
|
| 90 | 4 |
4.1%
|
|
| 100 | 41 |
41.8%
|
|
| Sysmiss | 662 |