| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
1.6%
|
| 1 | 1-2 production performance indicators | 74 |
38.3%
|
| 2 | 3-9 production performance indicators | 96 |
49.7%
|
| 3 | 10 or more production performance indicators | 20 |
10.4%
|