| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 15 |
1.5%
|
| 1 | 1-2 production performance indicators | 200 |
19.9%
|
| 2 | 3-9 production performance indicators | 391 |
39%
|
| 3 | 10 or more production performance indicators | 195 |
19.4%
|
| 4 | No production performance indicators | 202 |
20.1%
|
| Sysmiss | 1632 |