| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 5 | 1 |
6.3%
|
|
| 10 | 1 |
6.3%
|
|
| 15 | 4 |
25%
|
|
| 25 | 1 |
6.3%
|
|
| 30 | 4 |
25%
|
|
| 35 | 2 |
12.5%
|
|
| 40 | 2 |
12.5%
|
|
| 45 | 1 |
6.3%
|
|
| Sysmiss | 157 |