| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | 1-2 production performance indicators | 12 |
21.1%
|
| 2 | 3-9 production performance indicators | 34 |
59.6%
|
| 3 | 10 or more production performance indicators | 11 |
19.3%
|
| Sysmiss | 158 |