| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 | 
                                                                 
                                    
                                    2%
                                 
                                                             | 
                                                        
                    
| 1 | 1-2 production performance indicators | 16 | 
                                                                 
                                    
                                    15.7%
                                 
                                                             | 
                                                        
                    
| 2 | 3-9 production performance indicators | 31 | 
                                                                 
                                    
                                    30.4%
                                 
                                                             | 
                                                        
                    
| 3 | 10 or more production performance indicators | 53 | 
                                                                 
                                    
                                    52%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 48 |