| Value | Category | Cases | |
|---|---|---|---|
| 1 | 0 times | 1726 | 
                                                                 
                                    
                                    97%
                                 
                                                             | 
                                                        
                    
| 2 | 1 or 2 times | 37 | 
                                                                 
                                    
                                    2.1%
                                 
                                                             | 
                                                        
                    
| 3 | 3 to 9 times | 4 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    
| 4 | 10 or more times | 13 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 90 |