| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 130 |
23.9%
|
| 0 | 248 |
45.5%
|
|
| 1 | 24 |
4.4%
|
|
| 2 | 30 |
5.5%
|
|
| 3 | 21 |
3.9%
|
|
| 4 | 12 |
2.2%
|
|
| 5 | 27 |
5%
|
|
| 6 | 11 |
2%
|
|
| 7 | 2 |
0.4%
|
|
| 8 | 4 |
0.7%
|
|
| 10 | 13 |
2.4%
|
|
| 12 | 3 |
0.6%
|
|
| 15 | 4 |
0.7%
|
|
| 20 | 3 |
0.6%
|
|
| 25 | 9 |
1.7%
|
|
| 28 | 1 |
0.2%
|
|
| 30 | 2 |
0.4%
|
|
| 70 | 1 |
0.2%
|
|
| Sysmiss | 184 |