| Value | Category | Cases | |
|---|---|---|---|
| 1 | Hole smaller than a thumb/figer 0.2-2 cm | 118 | 
                                                                 
                                    
                                    9.4%
                                 
                                                             | 
                                                        
                    
| 2 | Hole larger than thumb but smaller than fist/hand 2-10 cm | 126 | 
                                                                 
                                    
                                    10%
                                 
                                                             | 
                                                        
                    
| 3 | Hole larger than fist but smaller than head 10-25 cm | 74 | 
                                                                 
                                    
                                    5.9%
                                 
                                                             | 
                                                        
                    
| 4 | Hole larger than head, more than 25 cm | 67 | 
                                                                 
                                    
                                    5.3%
                                 
                                                             | 
                                                        
                    
| 5 | No holes | 870 | 
                                                                 
                                    
                                    69.3%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 5226 |