| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not valid (more than 1 scale missing) | 7 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    
| 2 | Valid (1 or none scale missing) | 2447 | 
                                                                 
                                    
                                    99.7%
                                 
                                                             |