| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
7.1%
|
| 0 | None | 11 |
19.6%
|
| 1 | 2 |
3.6%
|
|
| 3 | 1 |
1.8%
|
|
| 5 | 6 |
10.7%
|
|
| 10 | 12 |
21.4%
|
|
| 20 | 6 |
10.7%
|
|
| 25 | 1 |
1.8%
|
|
| 26 | 1 |
1.8%
|
|
| 30 | 4 |
7.1%
|
|
| 35 | 1 |
1.8%
|
|
| 40 | 2 |
3.6%
|
|
| 50 | 2 |
3.6%
|
|
| 70 | 1 |
1.8%
|
|
| 80 | 2 |
3.6%
|
|
| Sysmiss | 89 |