| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 11 |
8.8%
|
| 1 | 1-2 production performance indicators | 54 |
43.2%
|
| 2 | 3-9 production performance indicators | 50 |
40%
|
| 3 | 10 or more production performance indicators | 10 |
8%
|
| Sysmiss | 473 |