| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
1.4%
|
| 1 | 1-2 production performance indicators | 99 |
35.1%
|
| 2 | 3-9 production performance indicators | 148 |
52.5%
|
| 3 | 10 or more production performance indicators | 31 |
11%
|
| Sysmiss | 441 |