| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
1.1%
|
| 1 | 1-2 production performance indicators | 33 |
12%
|
| 2 | 3-9 production performance indicators | 146 |
53.3%
|
| 3 | 10 or more production performance indicators | 92 |
33.6%
|
| Sysmiss | 338 |