| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
1.5%
|
| 1 | 1-2 production performance indicators | 67 |
33.2%
|
| 2 | 3-9 production performance indicators | 112 |
55.4%
|
| 3 | 10 or more production performance indicators | 20 |
9.9%
|
| Sysmiss | 511 |