| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.6%
|
| 1 | 1-2 production performance indicators | 43 |
25%
|
| 2 | 3-9 production performance indicators | 90 |
52.3%
|
| 3 | 10 or more production performance indicators | 38 |
22.1%
|
| Sysmiss | 182 |