| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 3 | 1 |
1.6%
|
|
| 5 | 6 |
9.5%
|
|
| 7 | 2 |
3.2%
|
|
| 8 | 1 |
1.6%
|
|
| 9 | 1 |
1.6%
|
|
| 10 | 13 |
20.6%
|
|
| 15 | 8 |
12.7%
|
|
| 18 | 1 |
1.6%
|
|
| 20 | 13 |
20.6%
|
|
| 25 | 2 |
3.2%
|
|
| 30 | 9 |
14.3%
|
|
| 50 | 4 |
6.3%
|
|
| 60 | 1 |
1.6%
|
|
| 70 | 1 |
1.6%
|
|
| Sysmiss | 742 |