| Value | Category | Cases | |
|---|---|---|---|
| 1 | Hole smaller than a thumb/figer 0.2-2 cm | 2 | 
                                                                 
                                    
                                    7.4%
                                 
                                                             | 
                                                        
                    
| 2 | Hole larger than thumb but smaller than fist/hand 2-10 cm | 3 | 
                                                                 
                                    
                                    11.1%
                                 
                                                             | 
                                                        
                    
| 3 | Hole larger than fist but smaller than head 10-25 cm | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 4 | Hole larger than head, more than 25 cm | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 5 | No holes | 22 | 
                                                                 
                                    
                                    81.5%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 6454 |