| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 10 | 4 |
5.6%
|
|
| 15 | 4 |
5.6%
|
|
| 20 | 14 |
19.7%
|
|
| 25 | 2 |
2.8%
|
|
| 30 | 13 |
18.3%
|
|
| 40 | 4 |
5.6%
|
|
| 50 | 26 |
36.6%
|
|
| 60 | 2 |
2.8%
|
|
| 70 | 2 |
2.8%
|
|
| Sysmiss | 1025 |