| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 9 |
1.7%
|
| 1 | 1-2 production performance indicators | 216 |
41.3%
|
| 2 | 3-9 production performance indicators | 252 |
48.2%
|
| 3 | 10 or more production performance indicators | 46 |
8.8%
|
| Sysmiss | 1050 |