| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
1.9%
|
| 1 | 1-2 production performance indicators | 57 |
36.5%
|
| 2 | 3-9 production performance indicators | 80 |
51.3%
|
| 3 | 10 or more production performance indicators | 16 |
10.3%
|
| Sysmiss | 77 |