| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
1%
|
| 1 | 1-2 production performance indicators | 174 |
45.3%
|
| 2 | 3-9 production performance indicators | 171 |
44.5%
|
| 3 | 10 or more production performance indicators | 35 |
9.1%
|
| Sysmiss | 614 |