| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
2.5%
|
| 5 | 2 |
5%
|
|
| 10 | 6 |
15%
|
|
| 12 | 3 |
7.5%
|
|
| 15 | 4 |
10%
|
|
| 20 | 1 |
2.5%
|
|
| 25 | 2 |
5%
|
|
| 27 | 1 |
2.5%
|
|
| 30 | 3 |
7.5%
|
|
| 35 | 2 |
5%
|
|
| 49 | 1 |
2.5%
|
|
| 50 | 4 |
10%
|
|
| 60 | 1 |
2.5%
|
|
| 70 | 1 |
2.5%
|
|
| 80 | 1 |
2.5%
|
|
| 100 | 7 |
17.5%
|
|
| Sysmiss | 133 |