| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 26 |
41.3%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 2 |
3.2%
|
|
| 2 | 5 |
7.9%
|
|
| 3 | 7 |
11.1%
|
|
| 4 | 2 |
3.2%
|
|
| 5 | 1 |
1.6%
|
|
| 6 | 1 |
1.6%
|
|
| 7 | 2 |
3.2%
|
|
| 10 | 6 |
9.5%
|
|
| 12 | 1 |
1.6%
|
|
| 14 | 1 |
1.6%
|
|
| 15 | 2 |
3.2%
|
|
| 18 | 1 |
1.6%
|
|
| 19 | 1 |
1.6%
|
|
| 20 | 3 |
4.8%
|
|
| 25 | 1 |
1.6%
|
|
| 30 | 1 |
1.6%
|
|
| Sysmiss | 538 |