| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
0%
|
| -7 | Does not apply (spontaneous) | 176 |
1.9%
|
| 1 | Yes | 6249 |
66.6%
|
| 2 | No | 2947 |
31.4%
|
| Sysmiss | 9281 |