| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 10 |
2.4%
|
| 1 | 1-2 production performance indicators | 175 |
42.8%
|
| 2 | 3-9 production performance indicators | 136 |
33.3%
|
| 3 | 10 or more production performance indicators | 88 |
21.5%
|
| Sysmiss | 610 |