| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 57 |
13.8%
|
| -4 | Too many to count | 291 |
70.3%
|
| 0 | 9 |
2.2%
|
|
| 1 | 1 |
0.2%
|
|
| 2 | 7 |
1.7%
|
|
| 3 | 8 |
1.9%
|
|
| 4 | 5 |
1.2%
|
|
| 5 | 13 |
3.1%
|
|
| 6 | 6 |
1.4%
|
|
| 8 | 1 |
0.2%
|
|
| 10 | 7 |
1.7%
|
|
| 15 | 3 |
0.7%
|
|
| 20 | 3 |
0.7%
|
|
| 30 | 1 |
0.2%
|
|
| 40 | 1 |
0.2%
|
|
| 42 | 1 |
0.2%
|
|
| Sysmiss | 605 |