| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 26 |
10.8%
|
| 1 | Yes | 12 |
5%
|
| 2 | No | 202 |
84.2%
|
| Sysmiss | 119 |