| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
2.1%
|
| 1 | 1-2 production performance indicators | 39 |
16.3%
|
| 2 | 3-9 production performance indicators | 137 |
57.1%
|
| 3 | 10 or more production performance indicators | 59 |
24.6%
|
| Sysmiss | 234 |