| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | 1-2 production performance indicators | 21 |
84%
|
| 2 | 3-9 production performance indicators | 3 |
12%
|
| 3 | 10 or more production performance indicators | 1 |
4%
|
| Sysmiss | 367 |