| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 24 |
70.6%
|
|
| 1 | 3 |
8.8%
|
|
| 2 | 3 |
8.8%
|
|
| 4 | 1 |
2.9%
|
|
| 6 | 1 |
2.9%
|
|
| 15 | 1 |
2.9%
|
|
| 40 | 1 |
2.9%
|
|
| Sysmiss | 206 |