| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 0 |
0%
|
| 0 | 17 |
89.5%
|
|
| 5 | 1 |
5.3%
|
|
| 20 | 1 |
5.3%
|
|
| Sysmiss | 222 |