| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 21 |
17.8%
|
| 0 | None | 52 |
44.1%
|
| 1 | 3 |
2.5%
|
|
| 2 | 5 |
4.2%
|
|
| 3 | 2 |
1.7%
|
|
| 5 | 5 |
4.2%
|
|
| 6 | 1 |
0.8%
|
|
| 7 | 2 |
1.7%
|
|
| 8 | 1 |
0.8%
|
|
| 10 | 7 |
5.9%
|
|
| 15 | 5 |
4.2%
|
|
| 20 | 5 |
4.2%
|
|
| 25 | 1 |
0.8%
|
|
| 30 | 3 |
2.5%
|
|
| 31 | 1 |
0.8%
|
|
| 35 | 1 |
0.8%
|
|
| 40 | 1 |
0.8%
|
|
| 50 | 1 |
0.8%
|
|
| 90 | 1 |
0.8%
|
|
| Sysmiss | 31 |