| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
11.1%
|
| 1 | 1-2 production performance indicators | 6 |
33.3%
|
| 2 | 3-9 production performance indicators | 5 |
27.8%
|
| 3 | 10 or more production performance indicators | 5 |
27.8%
|
| Sysmiss | 93 |