| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 70 |
7.3%
|
| 0 | 235 |
24.6%
|
|
| 1 | 469 |
49.2%
|
|
| 2 | 39 |
4.1%
|
|
| 3 | 17 |
1.8%
|
|
| 4 | 14 |
1.5%
|
|
| 5 | 29 |
3%
|
|
| 6 | 3 |
0.3%
|
|
| 7 | 1 |
0.1%
|
|
| 8 | 4 |
0.4%
|
|
| 10 | 21 |
2.2%
|
|
| 12 | 1 |
0.1%
|
|
| 15 | 19 |
2%
|
|
| 20 | 32 |
3.4%
|
|
| Sysmiss | 12 |