| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
2.4%
|
| 1 | 1-2 production performance indicators | 18 |
14.5%
|
| 2 | 3-9 production performance indicators | 57 |
46%
|
| 3 | 10 or more production performance indicators | 46 |
37.1%
|
| Sysmiss | 234 |