| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
5.1%
|
| 0 | 50 |
64.1%
|
|
| 10 | 2 |
2.6%
|
|
| 20 | 3 |
3.8%
|
|
| 25 | 2 |
2.6%
|
|
| 30 | 2 |
2.6%
|
|
| 40 | 3 |
3.8%
|
|
| 50 | 4 |
5.1%
|
|
| 70 | 1 |
1.3%
|
|
| 80 | 2 |
2.6%
|
|
| 90 | 1 |
1.3%
|
|
| 100 | 4 |
5.1%
|
|
| Sysmiss | 72 |