| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
9.9%
|
| 0 | 26 |
36.6%
|
|
| 2 | 1 |
1.4%
|
|
| 4 | 1 |
1.4%
|
|
| 5 | 1 |
1.4%
|
|
| 10 | 4 |
5.6%
|
|
| 17 | 2 |
2.8%
|
|
| 20 | 7 |
9.9%
|
|
| 30 | 8 |
11.3%
|
|
| 40 | 3 |
4.2%
|
|
| 50 | 2 |
2.8%
|
|
| 60 | 2 |
2.8%
|
|
| 70 | 3 |
4.2%
|
|
| 87 | 1 |
1.4%
|
|
| 88 | 1 |
1.4%
|
|
| 100 | 2 |
2.8%
|
|
| Sysmiss | 297 |