| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.8%
|
| 1 | 1-2 production performance indicators | 32 |
26.4%
|
| 2 | 3-9 production performance indicators | 75 |
62%
|
| 3 | 10 or more production performance indicators | 13 |
10.7%
|
| Sysmiss | 479 |