| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
1.7%
|
| 1 | 1-2 production performance indicators | 19 |
16.1%
|
| 2 | 3-9 production performance indicators | 56 |
47.5%
|
| 3 | 10 or more production performance indicators | 41 |
34.7%
|
| Sysmiss | 189 |