| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
3.9%
|
| 1 | 1-2 production performance indicators | 31 |
40.3%
|
| 2 | 3-9 production performance indicators | 34 |
44.2%
|
| 3 | 10 or more production performance indicators | 9 |
11.7%
|
| Sysmiss | 288 |