| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.8%
|
| 0 | None | 49 |
38.6%
|
| 1 | 1 |
0.8%
|
|
| 2 | 5 |
3.9%
|
|
| 3 | 1 |
0.8%
|
|
| 5 | 23 |
18.1%
|
|
| 10 | 10 |
7.9%
|
|
| 15 | 7 |
5.5%
|
|
| 17 | 1 |
0.8%
|
|
| 20 | 26 |
20.5%
|
|
| 35 | 1 |
0.8%
|
|
| 40 | 1 |
0.8%
|
|
| 70 | 1 |
0.8%
|
|
| Sysmiss | 23 |