| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 38 |
12.4%
|
| 0 | 9 |
2.9%
|
|
| 1 | 74 |
24.1%
|
|
| 2 | 31 |
10.1%
|
|
| 3 | 15 |
4.9%
|
|
| 4 | 3 |
1%
|
|
| 5 | 52 |
16.9%
|
|
| 6 | 2 |
0.7%
|
|
| 8 | 1 |
0.3%
|
|
| 10 | 48 |
15.6%
|
|
| 11 | 1 |
0.3%
|
|
| 12 | 2 |
0.7%
|
|
| 13 | 1 |
0.3%
|
|
| 15 | 20 |
6.5%
|
|
| 18 | 2 |
0.7%
|
|
| 20 | 8 |
2.6%
|
|
| Sysmiss | 342 |