| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not valid (more than 1 scale missing) | 19 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    
| 2 | Valid (1 or none scale missing) | 3066 | 
                                                                 
                                    
                                    99.4%
                                 
                                                             |