| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
2.2%
|
| 0 | 144 |
53.9%
|
|
| 1 | 48 |
18%
|
|
| 2 | 35 |
13.1%
|
|
| 3 | 9 |
3.4%
|
|
| 4 | 7 |
2.6%
|
|
| 5 | 1 |
0.4%
|
|
| 6 | 3 |
1.1%
|
|
| 10 | 4 |
1.5%
|
|
| 12 | 2 |
0.7%
|
|
| 15 | 1 |
0.4%
|
|
| 30 | 3 |
1.1%
|
|
| 40 | 1 |
0.4%
|
|
| 60 | 3 |
1.1%
|
|
| Sysmiss | 78 |