| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    
| 1 | 1-2 production performance indicators | 33 | 
                                                                 
                                    
                                    13.1%
                                 
                                                             | 
                                                        
                    
| 2 | 3-9 production performance indicators | 129 | 
                                                                 
                                    
                                    51.4%
                                 
                                                             | 
                                                        
                    
| 3 | 10 or more production performance indicators | 87 | 
                                                                 
                                    
                                    34.7%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 358 |