| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
4.7%
|
| 1 | 1-2 production performance indicators | 22 |
14.9%
|
| 2 | 3-9 production performance indicators | 102 |
68.9%
|
| 3 | 10 or more production performance indicators | 17 |
11.5%
|
| Sysmiss | 450 |