| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
0.9%
|
| 1 | 1-2 production performance indicators | 32 |
9.9%
|
| 2 | 3-9 production performance indicators | 155 |
48.1%
|
| 3 | 10 or more production performance indicators | 132 |
41%
|
| Sysmiss | 278 |