| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
1.4%
|
| 1 | 1-2 production performance indicators | 38 |
27%
|
| 2 | 3-9 production performance indicators | 66 |
46.8%
|
| 3 | 10 or more production performance indicators | 35 |
24.8%
|
| Sysmiss | 247 |