| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 51 |
28.2%
|
| 0 | 70 |
38.7%
|
|
| 1 | 12 |
6.6%
|
|
| 2 | 10 |
5.5%
|
|
| 3 | 6 |
3.3%
|
|
| 4 | 12 |
6.6%
|
|
| 5 | 4 |
2.2%
|
|
| 6 | 2 |
1.1%
|
|
| 7 | 3 |
1.7%
|
|
| 9 | 1 |
0.6%
|
|
| 10 | 3 |
1.7%
|
|
| 11 | 1 |
0.6%
|
|
| 12 | 1 |
0.6%
|
|
| 20 | 3 |
1.7%
|
|
| 30 | 2 |
1.1%
|
|
| Sysmiss | 178 |