| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 55 |
65.5%
|
| 15 | 3 |
3.6%
|
|
| 20 | 5 |
6%
|
|
| 25 | 3 |
3.6%
|
|
| 30 | 6 |
7.1%
|
|
| 35 | 1 |
1.2%
|
|
| 40 | 4 |
4.8%
|
|
| 45 | 1 |
1.2%
|
|
| 50 | 1 |
1.2%
|
|
| 55 | 1 |
1.2%
|
|
| 60 | 2 |
2.4%
|
|
| 70 | 2 |
2.4%
|
|
| Sysmiss | 73 |