| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
3.1%
|
| 1 | 1-2 production performance indicators | 26 |
19.8%
|
| 2 | 3-9 production performance indicators | 57 |
43.5%
|
| 3 | 10 or more production performance indicators | 44 |
33.6%
|
| Sysmiss | 226 |