| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very low technical quality | 1 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    
| 2 | 1 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 3 | 2 | 
                                                                 
                                    
                                    2.9%
                                 
                                                             | 
                                                        
                    |
| 4 | 4 | 
                                                                 
                                    
                                    5.9%
                                 
                                                             | 
                                                        
                    |
| 6 | 4 | 
                                                                 
                                    
                                    5.9%
                                 
                                                             | 
                                                        
                    |
| 7 | 15 | 
                                                                 
                                    
                                    22.1%
                                 
                                                             | 
                                                        
                    |
| 8 | 20 | 
                                                                 
                                    
                                    29.4%
                                 
                                                             | 
                                                        
                    |
| 9 | 12 | 
                                                                 
                                    
                                    17.6%
                                 
                                                             | 
                                                        
                    |
| 10 | Very high technical quality | 9 | 
                                                                 
                                    
                                    13.2%
                                 
                                                             | 
                                                        
                    
| 11 | Don't know | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 28 |