| 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 |