| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
2.8%
|
| 1 | 1-2 production performance indicators | 31 |
43.7%
|
| 2 | 3-9 production performance indicators | 24 |
33.8%
|
| 3 | 10 or more production performance indicators | 14 |
19.7%
|
| Sysmiss | 78 |